fis: A Pathfinder

This is a computer-generated pathfinder created against the Distant Reader study called fis.

Each Distant Reader study carrel is composed of many individual items. Each item is bibliographically described with author, title, date, summary, and keyword values. Below is a list of the items' most signficant keywords as well as lists of the items themselves. Purpusing the content of this pathfinder provides the student, researcher, or scholar with one way to get their heads around the scope of the carrel. The keywords include:

Crack; Fatigue; Fracture; Strain; Model; Concrete; Strength; Loading; Damage; Load; Steel; Material; Specimens; Specimen; Temperature; Failure; Surface; Mode; Growth; Test; Properties; Analysis; Tensile; Energy; Composite; Plastic; Results; Shear; Materials; Life; Strutturale; Time; Composites; Matrix; Numerical; Method; Alloy; Data; Notch; Integrità; Pressure; Deformation; Effect; Parameters; Beam; Frattura; Plane; Rate; Heat; Mpa; Cement; Structure; Displacement; Plate; Joints; Water; Behavior; Value; Che; Della; Structures; Layer; Reinforcement; Contact; Field; Defect; Igf; Laser; Phase; Direction; Criterion; Image; Elements; Density; Cracks; Speed; Nano; Soil; Hydrogen; Http://www.gruppofrattura.it; Theory; Power; Fluid; Filler; Punto; Max; Laminates; Transformation; Sin; Int; Dal; Ring; Cone; Lead; Solid; Browser

Depending on how this pathfinder was created, many of the bibliographic sections will include elaborations on the meaning(s) of the given keywords. These elaborations were generated by feeding the items' summaries to a large langauge model and asking the model to address the question, "What is X?", where "X" is the keyword. The result will be a few sentences of elaboration. Be forewarned. The elaborations are often plausible, but they should not be take as truth. Instead, they should be taken as points for consideration.

• Microstructural characterisation related to hot tearing of Al-Cu sand mould castings by Merlin, M. (2013) - ons A, 35A (2 9. and Advanc 0.3221/IGF-ESIS. behaviour of a our of alumin erical feeders aining 4.8wt.% d available in coarseness of e hot spots. ease of the c hase, the cast ous microgra tions between the hot tea ber of samples he material du of hot tears in na - Italy) for ssandro Caval h. ord (2003). I uid with some a sort of ske between neig n in the mush ully liquid film f hot tears is p fication and a liquid to a s was prelimin as employed d. Keywords: alloy; analysis; bars; casting; crack; doi; eutectic; fig; figure; hot; igf; liquid; phase; tear; tearing
• Fracture mechanics analyses of the slip-side joggle regions of wing-leading-edge panels by Raju, I. S.; Knight, N. F.; Song, K.; Phillips, D. R. (2013) - Substrate def n of interface eme for 4-nod is made by co of the fractur d Integrità Struttu ease rates, the ack edge intera fect. and substrate d de (linear) 2D e omparing the re toughness urale, 15 (2011) e G values. The def e internal fo re used to eva rità Strutturale, 1 nd terminolog e that the orie he substrate a cident nodes, uplicated to c E-H is modi s of nodes h xplicitly by us e, as shown in efect Location cks are num nel acreage, an owards the acr Figure 10 Figure cts interact wi rfaces above e crack edges included in 9(b), the craz wo craze crac . Keywords: alii; con; crack; craze; defect; doi; edge; entry; fig; figure; fracture; heating; http://dx.medra.org/10.3221/igf-esis.15.05&auth=true; http://www.gruppofrattura.it; left; mode; panels; peak; raju; strain; tip; values
• The use of thermally expandable microcapsules for increasing the toughness and heal structural adhesives by Pesquet, Guillaume; da Silva, Lucas F. M.; Sato, Chiaki (2013) - The tests were carried out in a MTS servo-hydraulic machine with a load-cell of 5 kN load in laboratory ambient conditions (25ºC and relative humidity of 50%) and a cross-head rate of 10 mm/min. RESULTS Expansion test ig. 5 shows the expansion of used adhesives with respect to temperature. The local heating with the copper sheet expected to heal modified adhesives was unexpectedly highly salutary to non- modified adhesives AW106 and AV138M. Keywords: adhesives; crack; expansion; fracture; particles; specimens; temperature; tems; test; toughness
• Damage tolerance analysis of aircraft reinforced panels by Carta, F.; Pirondi, A. (2013) - The inclusion of the anti-bending device in the model 04-NB until the second reinforcement leads at a more faithful reproduction of the initial stage of crack propagation. The stress intensity factor trend obtained numerically as a function of crack growth was used to determine the fatigue crack growth rate, obtaining a good approximation of the experimental crack propagation rate in the skin. Keywords: alloy; crack; fig; figure; panels; propagation; skin; stringers
• An experimental study on flexural strength enhancement of concrete by means of small steel fibers by Namdar, Abdoullah; Bin Zakaria, Ideris; Bt Hazeli, Azimah; Javid Azimi, Sayed; Bin Abd. Razak, Abdul Syukor; Gopalakrishna, G. S. (2013) - The results show, for this type of fiber reinforcement concrete beam the best length of steel fiber is 50 mm. Steel fiber; Flexural strength; Corrugated steel fiber; Flexibility of beam; Shear crack; Flexural crack. Keywords: beam; concrete; crack; fiber; steel; strength
• Strength on cut edge and ground edge glass beams with the failure analysis method by Agnetti, Stefano (2013) - According to the theory of fracture mechanics, glass failure stress was defined using stress intensity factor KI. The glass specimens are tested in four-point bending performing flaw detection on the tested specimens after failure, in order to determine glass strength. Keywords: crack; edge; failure; flaw; fracture; glass; mirror; parameter; set; strength; stress; values
• A brittle fracture criterion for PMMA V-notches tensile specimens based on a length-enriched eXtended Finite Element approach by Benvenuti, E.; Tovo, R.; Livieri, P. (2013) - Independent stress fields are associated with each strain field by means of the following constitutive laws ( ) (1 ) ( ) σ x D E B x V (6.1) ( ) ( )(1 ) ( ) ρ ρσ x H x D E B x Figure 2: Regularized Heaviside function and corresponding gradient for various . Figure 3: Micro-cracks density function  obtained by differentiation of H . Keywords: benvenuti; crack; field; finite; stress
• About the certification of railway rails by De Iorio, A.; Grasso, M.; Penta, F.; Pucillo, G.P. (2013) - With reference to a series of fatigue, fracture toughness and fatigue crack growth tests carried out by the authors on specimens extracted from rails, the main lacks in the current standards, related to both the choice of the control parameters and the testing procedures, are pointed out. Among all tests prescribed by the Standard to qualify the rail steel, only fatigue tests, fracture toughness tests and fatigue crack growth tests have been carried out in the Department Lab. Keywords: crack; crack growth; fatigue; growth; rates; standard; tests; values
• A four-parameters model for fatigue crack growth data analysis by Grasso, M.; Penta, F.; Pinto, P.; Pucillo, G.P. (2013) - A four-parameters model for interpolation of fatigue crack growth data is presented. The main purpose of this work was to acquire enough experimental data to study the effects of different loading levels on the variability of fatigue crack growth data. Keywords: crack; data; fatigue; fitting; growth; model; parameters; set
• Mode I Stress Intensity Factors for triangular corner crack nearby intersecting of cylindrical holes by Salvati, E.; Livieri, P.; Tovo, R. (2013) - [16], Shen e Glinka [8] formularono la scrittura di una efficiente funzione peso scritta generalizzata da Sha e Yang Tuttavia, per risolvere ingegneristicamente, il problema di una cricca d’angolo nucleata all’incrocio fra due condotti cilindrici, è possibile assumere, in accordo con quanto fatto nel riferimento bibliografico Keywords: calcolo; che; con; crack; cricca; della; fig; forma; function; intensity; mpa; nel; pressione; sif; stress; una; weight
• Coupled FEM-DBEM method to assess crack growth in magnet system of Wendelstein 7-X by Citarella, R.; Lepore, M.; Fellinger, Joris; Bykov, Victor; Schauer, Felix (2013) - Figure 14: mode I SIFs (MPa√m) along the crack front for each step of crack advance for cracks N. 1 and 2. It is to be pointed out the formula used (Eq. 2) for calculating the equivalent SIF used in the Paris formula is: )2)(( 22 IIIIIIeq KKKK  (2) http://dx.medra.org/10.3221/IGF-ESIS.26.10&auth=true http://www.gruppofrattura.it R. Citarella et alii, Frattura ed Integrità Strutturale, 26 (2013) 92-103; DOI: 10.3221/IGF-ESIS.26.10 101 Figure 15: mode II SIFs (MPa√m) along the crack front for each step of crack advance for cracks N. 1 and 2. Keywords: abaqus; approach; citarella; crack; dbem; fem; fig; figure; growth; submodel
• High temperature initiation and propagation of cracks in 12%Cr-steel turbine disks by Foletti, S.; Lo Conte, A.; Salgarollo, S.; Bassi, F.; Riva, A. (2013) - [7, 8] and it is well known that for situations where linear elastic conditions prevail (short times and/or low loads) the linear elastic stress intensity factor, K, may be used to predict creep crack growth. The crack tip stress and strain rate fields of ductile materials under steady crack growth are characterised by the parameter C* which can successfully correlate creep crack growth. Keywords: crack; crack growth; creep; creep crack; growth; initiation; material; parameter; rate; stress; time
• A review of using thermoelasticity for structural integrity assessment by Marsavina, L.; Tomlinson, R.A. (2013) - [2] Tomlinson, R.A., Olden, E.J., Thermoelasticity for the analysis of crack tip stress fields – a review, Strain, (1999) 49 – 55. Methods to determine the stress intensity factor at crack tips using thermoelastic stress analysis are explored, starting from selected line techniques using the Westergaard equations to the most recent methods which utilise the full array of data available together with complex stress field equations. Keywords: crack; data; factors; fatigue; intensity; mode; stress; tip
• Experimental measurement and model validation of COD in pipe under bending with off-centered circumferential crack by Gentile, D.; Iannitti, G.; Bonora, N. (2014) - [6] Kishida, K., Zahoor, A., Crack-opening area calculations for circumferential throughwall pipe cracks, NP-5959-SR, Electric Power Research Institute, Palo Alto, CA.  0 0 0 * cos /    where 0 is a factor that depends on the amplitude of the applied bending and crack length and it is equal to the ratio of half crack angle  and the off center angle  for which there is half closure of the crack. Keywords: angle; bending; cod; configuration; crack; length; opening; pipe
• Numerical investigation on stress corrosion cracking behavior of dissimilar weld joints in pressurized water reactor plants by Zhao, Lingyan; Xue, He; Yang, Fuqiang; Suo, Yaohong (2014) - The units describe crack growth rate in terms of millimeter per second. RESULTS AND DISCUSSIONS echanical factors, such as crack opening stress, plastic strain and J-integral ahead of crack front, are always important to discuss the SCC crack growth behaviors. Keywords: alloy; crack; dmw; growth; rate; scc; strain; stress; weld
• Crack detection in beam-like structures by nonlinear harmonic identification by Casini, Paolo; Vestroni, Fabrizio; Giannini, Oliviero (2014) - Fatigue crack; Damage identification; Nonlinear dynamics; Cracked beam model. The obtained identification degrades quite dramatically and even moderate damage severity, especially if located close to a constraint, leads to an overestimation of damage positions and severity. Keywords: beam; crack; damage; harmonic; identification; position; severity
• Structural integrity of hierarchical composites by Paggi, Marco (2011) - Numerical examples regarding cutting tools made of hierarchical cellular polycrystalline materials are proposed, showing that tailoring of interface properties at the different scales is the way to achieve superior mechanical responses that cannot be obtained using standard materials KEYWORDS. In this paper, an example of active design is proposed, where it is shown that the interfaces in hierarchical cellular materials are determinant for the realization of desired material responses. Keywords: crack; fig; interfaces; level; material; microstructure; paggi
• Fracture-Safe and Fatigue-Reliable Structures by James, M. N. (2014) - Subsequently, in a series of papers between 1858 and 1870 Wöhler established several fundamental principles of the safe-life, or S-N, approach to fatigue design SUCCESS AND FAILURE n enormous amount of literature has been published on fatigue design, the application of fracture mechanics to structural design and on failure analysis, and the reliability achieved in the key industrial sectors of transport, energy extraction and generation, and pressure vessels is truly outstanding. Keywords: aircraft; crack; cracking; crane; design; failure; fatigue; fracture; life; service; shell; stress; structures
• Use of FBG sensors for monitoring cracks of the equestrian statue of Bartolomeo Colleoni in Venice by Felli, F.; Brotzu, A.; Pilone, D.; Vendittozzi, C. (2014) - Microsoft Word - numero_30_art_7 F. Felli et alii, Frattura ed Integrità Strutturale, 30 (2014) 48-54; DOI: 10.3221/IGF-ESIS.30.07 48 Focussed on: Fracture and Structural Integrity related Issues Use of FBG sensors for monitoring cracks of the equestrian statue of Bartolomeo Colleoni in Venice F. Felli, A. Brotzu, D. Pilone, C. Vendittozzi Dip. An array of FBG sensors connected in series was glued on the crack with the aim of capturing live information about the effect of applying stress on the crack opening. Keywords: crack; fbg; felli; horse; sensors; statue
• Critical applied stresses for a crack initiation from a sharp V-notch by Náhlík, L.; Huta, P.; Štegnerová, K. (2014) - [17] Dunn, M.L., Suwito, W., Cunningham, S.J., Fracture initiation at sharp notches: correlation using critical stress intensities. [20] Seweryn, A., Brittle fracture criterion for structures with sharp notches, Engineering Fracture Mechanics, 47 (1994) 673–681. Keywords: crack; fracture; notch; stress; tip; value
• The effect of thickness on out-of-plane constraint in terms of the T-stress by Matvienko, Yu.G. (2014) - 2. Figure 2: The angular distribution of crack tip plastic zone sizes for the middle plane in the CT specimen. It is shown that the plastic zone size is affected by the zzT -stress, i.e. there is strong effect of out-of-plane constraint (thickness) on crack tip plastic zones. Keywords: crack; mode; plastic; stress; thickness; tip
• Micro void coalescence of ductile fracture in mild steel during tensile straining by Pradhan, P. K.; Robi, P. S.; Roy, Sankar K. (2011) - Figure 1: Rectangular specimen with arrays of holes at different orientations: (a) Specimen without hole, (b) hole array at 00/900, (c) at 300, (d) at 400, (e) at 450, (f) at 500 and (g) at 600. For the specimens with hole array inclined at 90° (same as 0°) to the specimen edge, the fracture strain was least. Keywords: crack; deformation; fracture; holes; material; specimen; strain; tensile; void
• SCC and Corrosion Fatigue characterization of a Ti-6Al-4V alloy in a corrosive environment – experiments and numerical models by Baragetti, S.; Villa, F. (2014) - Figure 5: Corrosion fatigue test results for air, 3.5 % wt. Axial fatigue loading (R = 0.1) was imposed in the corrosion fatigue testing [11,12] in air, 3.5 wt. % NaCl water mixture and methanol water mixture at different wt. % methanol concentrations. Keywords: alloy; corrosion; crack; fatigue; methanol; model; propagation; results; static; stress; test; ti-6al-4v; water
• Elastic compliance of single-edge-notched tension SE(T) (or SENT) specimens by Tyson, B.; Ding, P.; Wang, X. (2014) - Plane stress constraints are difficult to simulate, and resort is normally made to a “generalized plane stress” formulation for this case. Table 1: Results of CANMET round robin: a0q and a0 are initial calculated and measured crack size values respectively, and af is the final crack size. Keywords: compliance; crack; plane; size; specimen; strain; stress
• In-service fatigue cracking of the propeller shafts joined by a spline-pinned construction to the engines of AN-24, AN-26, and IL-18 aircrafts by Shanyavskiy, A.; Toushentsov, A. (2014) - So having moved an PS from an AI-24, Series 2 to an AI-24VT engine brings about longer running time (4000…6000 h) to initiate fatigue cracks, whereas the opposite change of the running time (to 2000…4000 h) is the case for having the PS moved in the reversed direction—to an AI-24, Series 2 engine. Having analyzed the screening trends of PS on repairs revealed that the numbers of fatigue cracks increased in the PS from AI-24 engines. Keywords: crack; fatigue; propeller; running; shaft; spline; surface
• The effect of steady torsion on fatigue crack growth under rotating bending loading on aluminium alloy 7075-T6 by da Fonte, M.; Reis, L.; de Freitas, M. (2014) - Microsoft Word - numero_30_art_43 M. Da Fonte et alii, Frattura ed Integrità Strutturale, 30 (2014) 360-368; DOI: 10.3221/IGF-ESIS.30.43 360 Focussed on: Fracture and Structural Integrity related Issues The effect of steady torsion on fatigue crack growth under rotating bending loading on aluminium alloy 7075-T6 M. da Fonte IDMEC & ICEMS, Department of Mechanical Engineering, Nautical School fonte@enautica.pt L. Reis, M. de Freitas IDMEC & ICEMS, Instituto Superior Técnico, Universidade de Lisboa luis.g.reis@ist.utl.pt, mfreitas@dem.ist.utl.pt ABSTRACT. Recently, the knowledge of fatigue crack growth under typical loading conditions of axles and shafts with rotating bending and steady torsion is being object of research and industrial studies in order to apply damage tolerance concepts, mainly for maintenance purposes. Keywords: bending; crack; fatigue; growth; loading; mode; rotating; stress; torsion
• Application of Digital Image Correlation (DIC) in resonance machines for measuring fatigue crack growth by Lorenzino, P.; Beretta, G.; Navarro, A. (2014) - [5] Carroll, J. D., Abuzaid, W., Lambros, J., Sehitoglu, H., High resolution digital image correlation measurements of strain accumulation in fatigue crack growth, International Journal of Fatigue, 57 (2013) 140-150. Digital Image Correlation; Fatigue test; Resonance Machines; Crack growth. Keywords: crack; dic; image; resonance; specimen
• Are the Paris’ law parameters dependent on each other? by Carpinteri, Alberto; Paggi, Marco (2013) - At present, it is a common practice to describe the proc- ess of fatigue crack growth by a logarithmic d / da N vs. KΔ diagram (see e.g. Fig. 1). According to dimensional analysis and incomplete self-similarity concepts applied to the linear range of fatigue crack growth, a power-law asymptotic representation relating the parameter C to m and to the governing variables of the fatigue phenomenon is derived. Keywords: correlation; crack; fatigue; fracture; growth; law; parameters; paris
• Effect of the model’s geometry in fretting fatigue life prediction by Vázquez, J.; Navarro, C.; Domínguez, J. (2014) - [17]Navarro, C., Vázquez, J., Domínguez, J., 3D vs. 2D fatigue crack initiation and propagation in notched plates, Int. Fretting fatigue; Geometrical effects; Fatigue life model. Keywords: crack; fatigue; initiation; length; life; models; stress
• Interlaminar fracture in woven carbon/epoxy laminates by Reis, Paulo N.B.; Ferreira, José A.M.; Costa, José D.M.; Pereira, António M. (2014) - 2. DCB specimens were used with 180 mm length, 25 mm width and initial crack lengths (ao) of 30, 45 and 50 mm. For the same displacement, the increase of initial crack length decreases the loads. Keywords: compos; crack; fracture; interlaminar; length; load; mode
• Integrated assessment procedure for determining the fracture strength of glass components in CSP systems by Guerra Rosa, L.; Cruz Fernandes, J.; Li, B. (2014) - Microsoft Word - numero_30_art_53 L. Guerra Rosa et alii, Frattura ed Integrità Strutturale, 30 (2014) 438-445; DOI: 10.3221/IGF-ESIS.30.53 438 Focussed on: Fracture and Structural Integrity related Issues Integrated assessment procedure for determining the fracture strength of glass components in CSP systems L. Guerra Rosa, J. Cruz Fernandes, B. Li ICEMS & Dept. of Mechanical Engineering, Instituto Superior Tecnico Universidade de Lisboa, Av. The structural integrity and reliability of glass components are key issues for concentrated solar power (CSP) systems. Keywords: crack; design; fracture; glass; rosa; strength; stress
• Investigation about crack propagation paths in thin rim gears by Curà, F.; Mura, A.; Rosso, C. (2014) - [11] Guagliano, M., Vergani, L., Effect of crack closure on gear crack propagation, Int J Fatigue, 23 (2001) 65-73. /IGF-ESIS.30.54 453 [4] Lewicki, D. G., Ballarini R., Rim thickness effects on gear crack propagation life, International Journal of Fracture, 87 (1997) 59-86. Keywords: crack; gear; propagation; rim; thickness; tooth
• Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs by Spagnoli, A.; Migliazza, M.; Zucali, M.; Ferrero, A.M. (2014) - 101 102 103 104 105 106 107 108 Number of cycles [-] 0.0001 0.001 0.01 0.1 1 10 100 1000 R el at iv e bo w in g, b/ L [m m /m ] Figure 4: Relative bowing b/L vs number of cycles for 20 different realizations of grain orientation distribution along the slab thickness. Marble slabs, typically used as façade panels to externally cover buildings, might permanently deform after a certain time of environmental exposure. Keywords: bowing; calcite; crack; cycles; distribution; expansion; grain; marble; orientation; slab
• Stress induced martensite at the crack tip in NiTi alloys during fatigue loading by Sgambitterra, E.; Bruno, L.; Maletta, C. (2014) - [27] Maletta, C., Young, M.L., Stress-induced martensite in front of crack tips in NiTi shape memory alloys: modeling versus experiments, Journal of Materials Engineering and Performances, 20 (2011) 597–604. Due to these interesting features, as well as to their good mechanical performances and biocompatibility, NiTi alloys have seen growing use in many branches of engineering and medicine Keywords: alloys; crack; fatigue; memory; niti; shape; stress; temperature; tip; transformation
• Fatigue crack behavior on a Cu-Zn-Al SMA by Di Cocco, V.; Iacoviello, F.; Natali, S.; Volpe, V. (2014) - In the last decades, different shape memory alloys have been optimized, such as the copper-zinc-aluminum (ZnCuAl), copper-aluminum-nickel (CuAlNi), nickel-manganese-gallium (NiMnGa), nickel-titanium (NiTi), and other SMAs obtained alloying zinc, copper, gold, iron, etc.. However, the near equiatomic NiTi binary system shows the most interesting properties and it is currently used in an increasing number of applications in many fields of engineering, for the realization of smart sensors and actuators, joining devices, hydraulic and pneumatic valves, release/separation systems, consumer applications and commercial gadgets [1] Dong, Y., Boming, Z., Jun, L., A changeable aerofoil actuated by shape memory alloy springs, Materials Science and Engineering A, 485 (2008) 243–250. Keywords: alloys; crack; fig; shape; sma
• Evolution of crack paths and compliance in round bars under cyclic tension and bending by Toribio, J.; Matos, J.C.; González, B.; Escuadra, J. (2014) - 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 a/D a/ b m=2 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 m=2 a/D a/ b Figure 5: Evolution of the aspect ratio a/b with crack growth (represented by the relative crack depth a/D) for m=2, starting from different initial crack geometries under tension loading (left) and bending moment (right). 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 m=3 a/D a/ b 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 m=3 a/D a/ b Figure 6: Evolution of the aspect ratio a/b with crack growth (represented by the relative crack depth a/D) for m=3, starting from different initial crack geometries under tension loading (left) and bending moment (right). Keywords: bending; compliance; crack; dimensionless
• A research on detecting and recognizing bridge cracks in complex underwater conditions by Tao, Wang; Tao, Du; Xiaohong, Zou; Yiming, Sun (2014) - We can obtain crack images with a high contrast after performing equalization processing on the original image, as shown in Fig. In addition, bit manipulation, the most basic operation in the computer, occupied the absolute advantage in calculation speed because the hardware of the computer only identifies 0 and 1. 2) Measurement of length and width In practical crack image, absolute across and down do not exist. Keywords: area; crack; gray; image; method; value
• Study of short cracks under biaxial fatigue by Lopez-Crespo, P.; Moreno, B.; Garcia-Gonzalez, A.; Zapatero, J.; Lopez-Moreno, A. (2014) - Biaxial fatigue; Proportional loading; Fatigue crack growth; Crack initiation INTRODUCTION nderstanding the behaviour of engineering components under biaxial load is crucial for a number of industries, including aerospace, automobile and power generation industries. During the initiation, fatigue crack growth is different to that predicted by the above mentioned models, and oscillations are commonly observed on the growth curves. Keywords: crack; crespo; fatigue; fig; hole; lopez; strain
• Use of Circumferentially Cracked Bar sample for CTOD fracture toughness determination in the upper shelf regime by Gentile, D.; Persechino, I.; Bonora, N.; Iannitti, G.; Carlucci, A. (2014) - However, it was found that in CCB shallow crack (a/R=0.2) result in similar constraint as for SENT with a/W=0.5. A loss of constraint, resulting from large-scale yielding, relaxes the stress concentration for notched-tension panels and shallow-notch specimens, while deep-notch bend and compact specimens maintain a high level of crack tip constraint. Keywords: ccb; crack; ctod; damage; fracture; load; material; sent; stress; tip; toughness
• Electrical resistivity and ultrasonic measurements during sequential fracture test of cementitious composite by Veselý, V.; Kone?ný, P.; Lehner, P.; Pieszka, D.; Žídek, L. (2014) - There was observed a gradual reduction of concrete resistivity as the loading–unloading cycles went by in the case of the specimens set with pre-dried surface (which was conducted first). Cementitious composite; Three-point bending test; Electrical resistivity; Ultrasound pulse passing time; Effective crack length; Moisture. Keywords: concrete; crack; crack length; fracture; length; measurements; pre; resistivity; specimens; surface; test
• Biaxial fatigue tests and crack paths for AISI 304L stainless steel by Chaves, V.; Madrigal, C.; Navarro, A. (2014) - 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350  (MPa)  (M P a ) Experimental Ellipse quadrant Ellipse arc Figure 5: Experimental fatigue limits for the biaxial tests. SUMMARY AND CONCLUSIONS ISI 304L stainless steel cylindrical specimens were subjected to biaxial loading fatigue tests in order to construct the S–N curves for the material. Keywords: biaxial; crack; direction; fatigue; tests
• Determining mode I cohesive law of Pinus pinaster by coupling double cantilever beam test with digital image correlation by Xavier, J.; Oliveira, M.; Morais, J.J.L.; de Moura, M.F.S.F. (2014) - Wood; Mode I fracture mechanics; Double cantilever beam test; Cohesive law; Digital image correlation. Notwithstanding, it has been shown that the inverse identification of cohesive laws provide good agreement between experimental and numerical finite element simulations Keywords: cbbm; crack; dcb; irwin; law; mode; test; wood; xavier
• The influence of fibre orientation on the post-cracking tensile behaviour of steel fibre reinforced self-compacting concrete by Abrishambaf, A.; Cunha, V.M.C.F.; Barros, J.A.O. (2014) - [30] Stähli, P., Custer, R., On flow properties, fibre distribution, fibre orientation and flexural behaviour of FRC, Materials and Structures, 41 (2008) 189-196. The influence of fibre orientation on the post-cracking tensile behaviour of steel fibre reinforced self-compacting concrete A. Abrishambaf, V.M.C.F. Cunha, J.A.O. Barros ISISE, Dep. Keywords: concrete; crack; fibre; orientation; series; splitting; stress; tensile; test; uniaxial
• Modelling probabilistic fatigue crack propagation rates for a mild structural steel by Correia, J.A.F.O.; de Jesus, A.M.P.; Fernández-Canteli, A. (2014) - [13] was one of the first researchers to use the local strain approaches to model fatigue crack propagation. PROCEDURE TO GENERATE PROBABILISTIC FATIGUE CRACK PROPAGATION FIELDS he procedure proposed to derive probabilistic fatigue crack propagation fields may be summarized into the following steps: Keywords: crack; fatigue; fatigue crack; field; model; probabilistic; propagation; s355; steel; strain; stress; swt; tip
• FEM simulation of a crack propagation in a round bar under combined tension and torsion fatigue loading by Citarella, R.; Lepore, M.; Maligno, A.; Shlyannikov, V. (2014) - Furthermore, crack growth can be undertaken by extending the crack position. An updated finite element model is then created and run to simulate crack growth (Fig. 1). Keywords: blocks; citarella; crack; fatigue; fem; fig; growth; mesh
• A three-parameter model for fatigue crack growth data analysis by De Iorio, A.; Grasso, M.; Penta, F.; Pucillo, G.P. (2012) - Since both methods are based on local interpolation of experimental data, irregularities and/or anomalies in the data distribution, for the first method, and the number of data points chosen for the best-fit parabola, for the second one, affect significantly the results. However, it is well known that crack growth data have stochastic nature, as the phenomenon which generates them, due to, essentially, the random evolution of the local combinations, at each point of the crack front, of the induced stress state and material properties. Keywords: crack; data; figure; model; set
• Infrared thermography study of the fatigue crack propagation by Fedorova, A.Yu.; Bannikov, M.V.; Bannikov, M.V.; Plekhov, O.A.; Plekhova, E.V. (2012) - But there are only a few works devoted to direct investigation of temperature evolution at fatigue crack tip. 7 presents the detail analysis of the temperature evolution near fatigue crack tip in the direction of the crack propagation. Keywords: crack; fatigue; heat; loading; temperature; tip
• Evaluation of stress intensity factor of multiple inclined cracks under biaxial loading by Bhagat, R. K.; Singh, V. K.; Gope, P. C.; Chaudhary, A.K. (2012) - The stress intensity factors for non parallel cracks have similar value for upper and lower cracks, whereas in case of parallel cracks the value of stress intensity factor is E http://dx.medra.org/10.3221/IGF-ESIS.22.01&auth=true http://www.gruppofrattura.it R. K. Bhagat et alii, Frattura ed Integrità Strutturale, 22 (2012) 5-11; DOI: 10.3221/IGF-ESIS.22.01 11 lower for lower crack in comparison to upper crack. Effects of crack inclination angle on stress intensity factors for two parallel and non parallel cracks are investigated. Keywords: angle; crack; inclination; parallel; stress
• Development of an engineering methodology for non-linear fracture analysis of impact-damaged pressurized spacecraft structures by Telichev, Igor (2015) - The traction-free link L0 corresponds to the hole, links L1 and L3 are radial cracks and links L2 and L4 represent the plastic zones. [1] <599 1041 Present approach 590 1082 Deviation,% N/A 3.4 Table 1: Critical crack length (specimen: 2219-T87, ts=3.17 mm) CONCLUSIONS he present paper is focused on the engineering methodology which is viewed as a key element in the spacecraft design procedure providing that under no circumstances will the “unzipping” occur. Keywords: crack; fracture
• Measurement and analysis of fatigue crack deformation on the macro- and micro-scale by Nowell, D.; O’Connor, S.J.; Dragnevski, K.I. (2015) - T D. Nowell et alii, Frattura ed Integrità Strutturale, 33 (2015) 1-7; DOI: 10.3221/IGF-ESIS.33.01 2 MACROSCOPIC MEASUREMENTS ur earlier work on the measurement of crack tip displacement fields has employed a long range microscope, focused on an area approximately 600 x 400 m close to the crack tip [2]. [4] Nowell, D., Kartal, M.E., and de Matos, P.F.P., Characterisation of crack tip fields under non-uniform fatigue loading, Proc. Keywords: crack; data; displacement; fig; images; loading; tip
• Comparison of two multiaxial fatigue models applied to dental implants by Ayllon, JM.; Navarro, C; Vázquez, J.; Domínguez, J. (2015) - [9] Vazquez, J., Navarro, C., Dominguez, J., On the estimation of fatigue life in notches differentiating the phases of crack initiation and propagation, Fat. and Frac. of Engng. It is important to highlight that the entire process of crack initiation and propagation takes place within about half a millimetre, and that the model is able to reflect this in an acceptable manner. Keywords: crack; curve; distance; fatigue; implant; initiation; length; life; model; propagation; stress
• Competition between microstructure and defect in multiaxial high cycle fatigue by Morel, F.; Guerchais, R.; Saintier, N. (2015) - Since fatigue crack initiation is a local phenomenon, intimately related to the plastic activity at the crystal scale, it seems relevant to evaluate and use the mesoscopic mechanical quantities (i.e. the average mechanical quantities at the grain scale) to assess the macroscopic fatigue response. [9] Guilhem, Y., Basseville, S., Curtit, F., Stéphan, J.-M., Cailletaud, G., Investigation of the effect of grain clusters on fatigue crack initiation in polycrystals, Int J Fatigue, 32(11) (2010) 1748-1763. Keywords: crack; defect; fatigue; grain; initiation; loading; microstructure; morel; size; stress; tension
• Crack tip fields in elastic-plastic and mixed mode I+II+III conditions, finite elements simulations and modeling by Fremy, F.; Pommier, S.; Galenne, E.; Courtin, S. (2015) - A set of experiments was therefore conducted in order to characterize specifically the importance of the load path effect on mixed mode fatigue crack growth, all the other effects being as far as possible kept the same. the contribution of mode III to mixed mode fatigue crack growth can be determined by comparing pairs of load cases, namely the two “proportional” load paths (Fig. Keywords: crack; fatigue; fig; load; mode; path
• Spherical particles formation under biaxial cyclic loading due to mesotunneling effect by Shanyavskiy, A. (2015) - The local material heating under fatigue crack surfaces tearing made up oxidation by all surface including places with particles. These films create because of local material heating under fatigue crack surfaces tearing and particles rotation. Keywords: crack; crosspieces; fatigue; formation; fracture; mode; particles; surface; wear
• Three-dimensional effects on cracked components under anti-plane loading by Berto, F.; Campagnolo, A. (2015) - Figure 1: Notation for crack tip stress field. C F. Berto et alii, Frattura ed Integrità Strutturale, 33 (2015) 17-24; DOI: 10.3221/IGF-ESIS.33.03 21 Figure 4: Stresses τyz and τxy on crack surface at s = 0 mm from plate surface, t/a =1. Keywords: corner; crack; mode; point; surface
• Estimation of the crack propagation direction in a mixed-mode geometry via multi-parameter fracture criteria by Malíková, L.; Veselý, V.; Seitl, S. (2015) - [7] Veselý, V., Frantík, P., Sobek, J., Malíková (Šestáková), L., Seitl, S., Multi-parameter crack tip stress state description for estimation of nonlinear zone width in silicate composite specimens in component splitting/bending test geometry, Fatigue Fract. The direction of crack propagation is estimated semi- analytically using both the maximum tangential stress criterion and the strain energy density criterion (implemented as a procedure within the used finite element computational code) as well as numerically (from verification reasons). Keywords: crack; criterion; fracture; multi; parameter; stress; tip
• Some relationships between the peak stresses and the local strain energy density for cracks subjected to mixed-mode (I+II) loading by Meneghetti, G.; Campagnolo, A.; Berto, F. (2015) - Originally it was formulated for cases where only mode I singular stresses exists (i.e. K2 = 0 or mode II stresses are negligible). [18] Berto, F., Lazzarin, P., Multiparametric full-field representations of the in-plane stress fields ahead of cracked components under mixed mode loading, Int. Keywords: crack; loading; mode; peak; stress
• Measurement and simulation of strain fields around crack tips under mixed-mode fatigue loading by Hos, Y.; Vormwald, M.; Freire, J.L.F. (2015) - INTRODUCTION he fatigue crack growth under non-proportional mixed-mode loading at the crack tip depends on many influence factors, mainly on the mode-mixity. After 12 mm of crack growth a sharp kink to the cross section plane growth occurs. Keywords: crack; fig; figure; growth; loading; max; phase; s235; specimen; stress;  
• 3D Analyses of crack propagation in torsion by Shiozawa, D.; Munoz, Serrano; Dancette, S.; Verdu, C.; Lachambre, J.; Buffiere, J.-Y. (2015) - To discuss the change of crack propagation mode from Mode III to Mode I in the bulk of the sample, the values of stress intensity factors for a crack in torsion have been calculated by FEM analysis. Within the first grain, the cracks have a pronounced crystallographic propagation mode (mode II crack growth) and strongly interact with the grain boundaries. Keywords: crack; fatigue; mode; sample; surface
• Near tip strain evolution of a growing fatigue crack by Zhu, M.-L.; Lu, Y.-W.; Lupton, C.; Tong, J. (2015) - A method for the determination of crack tip location is proposed for the DIC analysis. DIC; Crack tip; Error analysis; Fatigue crack growth; Strain ratchetting. Keywords: crack; dic; fatigue; growth; strain; tip
• Specimen thickness effect on elastic-plastic constraint parameter A by Nikishkov, G.P.; Matvienko, Yu.G. (2015) - Figure 4: Dependence of constraint parameter A on specimen thickness /t Figure 5: Dependence of constraint parameter A on crack depth /a Keywords: constraint; crack; parameter; plastic; specimen; stress
• Interpreting experimental fracture toughness results of quasi-brittle natural materials through multi-parameter approaches by Spagnoli, Andrea; Carpinteri, Andrea; Vantadori, Sabrina (2015) - Such an adjustment of the nominal stress is for accounting the different relative initial notch lengths in Carrara marble and Verona marble specimens under consideration. [2], as is confirmed by the obtained ratio of nominal against effective critical stress intensity factors (on average equal to 0.80 and 0.89 for Carrara marble and Verona marble specimens, respectively). Keywords: carrara; crack; fracture; length; marble; material; parameter; size; verona
• 3D thickness effects around notch and crack tip stress/strain fields by Góes, R.C.O.; Castro, J.T.P.; Meggiolaro, M.A. (2015) - [13-14] studied 3D LE fields around ideally straight crack fronts in thick plates within the SIF- dominated zone, modeling that region as a disk of radius R centered at the tip, assuming the crack size a long compared to the cracked plate thickness (a >> B). 4 shows how much normalized SIF distributions along idealized straight crack fronts KI/KI,2D deviate from standard 2D solutions, for a wide range of B/a values including short and long cracks. Keywords: crack; effects; fields; notch; plate; sif; stress; tip; tips
• Can Delta Keff be assumed as the driving force for fatigue crack growth? by Castro, J.T.P.; Meggiolaro, M.A.; González, J.A.O. (2015) - A J.T.P. Castro et alii, Frattura ed Integrità Strutturale, 33 (2015) 97-104; DOI: 10.3221/IGF-ESIS.33.13 104 [2] Elber, W., The significance of fatigue crack closure, ASTM STP, 486 (1971) 230-242. [5] Vasudevan, A.K., Sadananda, K., Louat, N., Reconsideration of fatigue crack closure, Scripta Metall Mater, 27 (1992) 1663-1678. Keywords: closure; crack; driving; fatigue; fcg; load; opening; specimens; keff
• Fatigue crack tip damaging micromechanisms in a ferritic-pearlitic ductile cast iron by Iacoviello, Francesco; Di Cocco, Vittorio; Cavallini, Mauro (2015) - Figure 10: Fatigue crack propagation: rpz (reversed plastic zone); mpz (monotonic plastic zone); ez (elastic zone). As a consequence, fatigue crack propagation in the investigated ferritic-pearlitic DCI can be analysed with the K parameter only as first approximation, being the material non homogenous, at least at the scale of the fatigue damaging processes at the crack tip. Keywords: crack; fatigue; fig; graphite; iacoviello; nodules; path
• Multi-parameter approximation of stress field in a cracked specimen using purpose-built Java applications by Veselý, V.; Sobek, J.; Tesa?, D.; Frantík, P.; Pail, T.; Seitl, S. (2015) - [16] Sobek, J., Pail, T., Veselý, V., Evaluation of crack tip stress field using combination of advanced implementation of over-deterministic method and FE analysis, Key Eng. Microsoft Word - numero_33_art_16 V. Veselý et alii, Frattura ed Integrità Strutturale, 33 (2015) 120-133; DOI: 10.3221/IGF-ESIS.33.16 120 Focussed on characterization of crack tip fields Multi-parameter approximation of stress field in a cracked specimen using purpose-built Java applications V. Veselý, J. Sobek, D. Tesař, P. Frantík, T. Pail Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic vesely.v1@fce.vutbr.cz, sobek.j@fce.vutbr.cz, tesar.d1@study.fce.vutbr.cz, kitnarf@centrum.cz, pail.t@fce.vutbr.cz S. Seitl Academy of Sciences of the Czech Republic, v. v. i., Institute of Physics of Materials, Brno, Czech Republic seitl@ipm.cz ABSTRACT. Keywords: con; crack; exp; field; fracture; qua; selection; specimen; stress; ° (10
• Some experimental observations of crack-tip mechanics with displacement data by Mokhtari, M.; Lopez-Crespo, P.; Moreno, B.; Zanganeh, M. (2015) - Microsoft Word - numero_33_art_18 M. Mokhtari et alii, Frattura ed Integrità Strutturale, 33 (2015) 143-150; DOI: 10.3221/IGF-ESIS.33.18 143 Focussed on characterization of crack tip fields Some experimental observations of crack-tip mechanics with displacement data M. Mokhtari, P. Lopez-Crespo, B. Moreno Department of Civil and Materials Engineering, University of Malaga, C/Dr. Ortiz Ramos s/n, 29071 [5] Pan, B., Xie, H., Wang, Z., Qian, K., Wang, Z., Study on subset size selection in digital image correlation for speckle patterns, Optics express, 16(10) Keywords: correlation; crack; dic; displacement; image; size; stress; subset; terms; tip
• 2D mapping of plane stress crack-tip fields following an overload by Withers, P. J.; Lopez-Crespo, P.; Mostafavi, M.; Steuwer, A.; Kelleher, J. F.; Buslaps, T. (2015) - [5] Croft, M., Zhong, Z., Jisrawi, N., Zakharchenko, I., Holtz, R.L., Skaritka, J., Fast, T., Sadananda, K., Lakshmipathy, M., Tsakalakos, T., Strain profiling of fatigue crack overload effects using energy dispersive X-ray diffraction, International Journal of Fatigue, 27 (2005) 1408-1419. [16] Lopez-Crespo, P., Steuwer, A., Buslaps, T., Tai, Y.H., Lopez-Moreno, A., Yates, J.R., Withers, P.J., Measuring overload effects during fatigue crack growth in bainitic steel by synchrotron X-ray diffraction, International Journal of Fatigue, 71 (2015) 11-16. Keywords: crack; dic; fatigue; field; overload; p.j; strain; stress; tip
• Multi-scale approach for the analysis of the stress fields at a contact edge in fretting fatigue conditions with a crack analogue approach by Montebello, C.; Pommier, S.; Demmou, K.; Leroux, J.; Mériaux, J. (2015) - [6] Giannakopoulos, A., Suresh, S., Chenut, S., Similarities of stress concentrations in contact at round punches and fatigue at notches: implication to fretting fatigue crack initiation, Fatigue Fract Eng Mater Struct, 23(7) (2000) 561-71. The tools employed to describe the elastic-plastic behavior of the crack tip at the global scale are redefine and adapted to fretting fatigue contact problem via the crack analogue approach. Keywords: contact; crack; fatigue; stress;  
• Multi-scale crack closure measurements with digital image correlation on Haynes 230 by Beretta, Stefano; Rabbolini, Silvio; Di Bello, Angelo; Sehitoglu, Huseyin (2015) - [13] Schijve, J., Fatigue crack closure: observations and technical significance, in Mechanics of fatigue crack closure, American Society for Testing and Materials Philadelphia, PA., (1988) 5-34. The significance of fatigue crack closure. Keywords: closure; crack; displacements; fatigue; fig; growth; haynes; intensity; opening; stress; tip
• Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields by Vasco-Olmo, J.M.; Díaz, F.A. (2015) - Microsoft Word - numero_33_art_24 J.M. Vasco-Olmo et alii, Frattura ed Integrità Strutturale, 33 (2015) 191-198; DOI: 10.3221/IGF-ESIS.33.24 191 Focussed on characterization of crack tip fields Experimental evaluation of plasticity-induced crack shielding from crack tip displacements fields J.M. Vasco-Olmo, F.A. Díaz University of Jaén, Departamento de Ingeniería Mecánica y Minera, Campus Las Lagunillas, Edificio A3, 23071, Jaén, Spain [12] Skorupa, M., Beretta, S., Carboni, M., Machniewicz, T., An algorithm for evaluating fatigue crack closure from compliance measurements, Fatigue Fract. Keywords: crack; fatigue; load; loading; specimen; stress; tip; values
• A numerical study of non-linear crack tip parameters by Antunes, F.V.; Branco, R.; Correia, L.; Ramalho, AL (2015) - [35] Paul, S.K., Tarafder, S., Cyclic plastic deformation response at fatigue crack tips, Int Journal of Pressure Vessels and Piping, 101 (2013) 81-90. It was demonstrated that: i) LEFM concepts are applicable to the problem under study; ii) the crack closure phenomenon has a great influence on crack tip parameters decreasing their values; iii) the Keff concept is able to explain the variations of crack tip parameters produced by the contact of crack flanks; iv) the analysis of remote compliance is the best numerical parameter to quantify the crack opening level; v) without contact there is no effect of stress ratio on crack tip parameters. Keywords: closure; contact; crack; crack closure; crack tip; effect; fatigue; fatigue crack; growth; parameters; plastic; stress
• Load history effects on fatigue crack propagation: Its effect on the R-curve for threshold by Zhou, X.; Hohenwarter, A.; Leitner, T.; Gänser, H.P.; Pippan, R. (2015) - If during crack extension sufficient crack closure develops, the crack will stop the propagation. Microsoft Word - numero_33_art_26 X. Zhou et alii, Frattura ed Integrità Strutturale, 33 (2015) 209-214; DOI: 10.3221/IGF-ESIS.33.26 209 Focussed on characterization of crack tip fields Load history effects on fatigue crack propagation: Keywords: compression; crack; fatigue; leoben; stress; threshold
• Crack tip fields and mixed mode fracture behaviour of progressively drawn pearlitic steel by Toribio, J.; González, B.; Matos, J.C. (2015) - [12] Toribio, J., Ayaso, F.J., Anisotropic fracture behaviour of cold drawn steel: a materials science approach, Mater. [7] Toribio, J., Valiente, A., Failure analysis of cold drawn eutectoid steel wires for prestressed concrete, Eng. Keywords: angle; crack; drawing; fracture; sif; steel; toribio; toughness; wire
• Multi-challenge aspects in fatigue due to the combined occurrence of multiaxiality, variable amplitude loading, and size effects by Vormwald, M. (2015) - [24] Zerres, P., Vormwald, M., Review of fatigue crack growth under non-proportional mixed-mode loading, Int. As an example, Fig. 1 shows fatigue cracks initiated under uniaxial and severely non-proportional multiaxial loading. Keywords: amplitude; crack; fatigue; growth; life; loading; max; opening; sequence; strain; stress; vormwald
• A critical review of fracture mechanics as a tool for multiaxial fatigue life prediction of plastics by Winkler, Anders; Kloosterman, Gertjan (2015) - The role of the manufacturing process skin also becomes more tangible and with it, the explanation for bulk initiating fatigue cracks increasingly obvious, especially from a polymer physics point of view. Multiaxiality: Rather than going into a lengthy discussion on the nature of multiaxial stress states in plastic components, we are going to content ourselves with pointing out that even in a uniaxial load case, the presumption of a uniaxial stress state does not hold true. Keywords: alii; behaviour; crack; doi; fatigue; fig; fracture; frattura; igf; integrità; layer; material; plastics; stress; structure; strutturale; temperature; winkler
• Surface crack growth in cylindrical hollow specimen subject to tension and torsion by Shlyannikov, V.; Yarullin, R.; Ishtyryakov, I. (2015) - Surface crack; Tension; Torsion; Crack growth. The fatigue growth analysis of surface cracks is one of the most important elements for structural integrity prediction of the circular cylindrical metallic components (bars, wires, bolts, shafts, etc.) in the presence of initial and accumulated operation damages. Keywords: crack; crack growth; factor; fig; growth; loading; parameter; plastic; specimen; stress; surface; tension
• Local approaches for the fracture assessment of notched components: the research work developed by Professor Paolo Lazzarin by Berto, F. (2015) - [71] Lazzarin, P., Berto, F. Zappalorto, M., Mean values of the Strain Energy Density from coarse meshes: theoretical bases of a method suitable for rapid calculations of notch stress intensity factors and fatigue strength of welded joints, Int. A uniform analysis of nonlinear notch stress fields was presented based on the total- strain power-law in comparison to Neuber’s different analytical approach. Keywords: berto; crack; density; doi; energy; energy density; fatigue; fracture; lazzarin; loading; mode; notch; notches; radius; sed; strain; stress; value; volume
• Crack paths in smooth and precracked specimens subjected to multiaxial cyclic stressing by Gates, Nicholas R.; Fatemi, Ali (2015) - Additional smooth specimen tests were also performed for pure torsion loading, with and without the addition of a static tensile or compressive stress, to evaluate the effect of mean stresses on mode II crack growth. It was concluded that the main factor driving the branching of mode II cracks is crack face friction and wedging caused by surface asperities. Keywords: crack; crack growth; fatigue; friction; growth; loading; mode; mode ii; shear; sif; specimens; stress; tests; torsion; τmax
• Fracture morphology and its evolution A review on crack path stability and brittle fracture along butt-weld by Sumi, Y. (2015) - Figure 7: Crack paths observed in double-cantilever beam specimens [10] Amestoy, M., Leblond, J.B., Crack paths in plane situations-II. Keywords: crack; fracture; k k; path; stress;  
• Effect of fibre arrangement on the multiaxial fatigue of fibrous composites: a micromechanical computational model by Brighenti, Roberto; Carpinteri, Andrea; Scorza, Daniela (2015) - The fatigue domain (2) can be rewritten through the above dimensionless stress amplitudes: 2 2 , 0, , 0, , 1 , 1 ' ' 1z a ref r a ref af af          Figure 1: (a) Cylindrical fibre surrounded by a cylindrical portion of matrix material; (b) partially detached fibre under radial and axial stresses. Keywords: crack; damage; doi; fatigue; fibre; loading; material; matrix; number; stress
• Influence of local stress concentrations on the crack propagation in complex welded components by Fischer, C.; Fricke, W. (2015) - ‘Intermediate’ Variants Three additional variants 2 to 4 according to Fig. 1 were defined for the following crack propagation simulation so that the effects on crack propagation life can be separated. The integrations, however, must be done discretely because the SIF varies non-linearly and depends on the crack depth and crack shape. Keywords: attachment; crack; fatigue; life; plate; stress; transverse; transverse attachment; weld
• A link between the peak stresses and the averaged strain energy density for cracks under mixed-mode (I+II) loading by Meneghetti, G.; Atzori, B.; Campagnolo, A.; Berto, F. (2015) - Later on, the PSM has been extended to cracks subjected to mode I as well as mode II stresses [10]. Originally it was formulated for cases where only mode I singular stresses exists (i.e. K2 = 0 or mode II stresses are negligible). Keywords: crack; loading; mode; peak; sed; stress
• Estimation of stepwise crack propagation in ceramic laminates with strong interfaces by Náhlík, L.; Štegnerová, K.; Hutar, P. (2015) - Finite element models were developed in order to obtain a stress distribution in the laminate containing a crack and to simulate crack propagation. It was shown in the former work of authors [7] that suitable selection of materials with different elastic properties can lead to the higher values of applied load for crack propagation through interface. Keywords: amz; atz; ceramic; compressive; crack; doi; layer; propagation; stresses
• Measurement and simulation of crack growth rate and direction under non-proportional loadings by Hos, Y.; Vormwald, M. (2015) - INTRODUCTION he fatigue crack growth under non-proportional mixed-mode loading depends on many influence factors besides the mode-mixity. After 12 mm of crack growth a sharp kink to the cross section plane growth occurs. Keywords: closure; crack; cyclic; fatigue; growth; loading; max; specimen
• Effects of microstructure and crystallography on crack path and intrinsic resistance to shear-mode fatigue crack growth by Pokluda, J.; Vojtek, T.; Hohenwarter, A.; Pippan, R. (2015) - (2) Table 1: Summary of the experimentally obtained values of deflection angles of mode II loaded cracks, twist angles of mode III loaded cracks and the effective thresholds in mode II and mode III for 6 metallic materials. A criterion for mode I deflection from the mode II crack-tip loading, which uses values of the effective mode I and mode II thresholds, was in agreement with fractographical observations. Keywords: crack; mode; mode ii; pearlitic; shear; steel
• Crack paths and the linear elastic analysis of cracked bodies by Pook, L. P. (2015) - [30] Lam, Y. C., Mixed mode fatigue crack growth with a sudden change in loading direction. [2] Carpinteri, A., Spagnoli, A., A fractal analysis of size effect on fatigue crack growth. Keywords: analysis; crack; fatigue; fracture; growth; intensity; mode; point; pook; stress; surface; tip
• Effect of segregations on mechanical properties and crack propagation in spring steel by Žužek, B.; Sedlacek, M.; Podgornik, B. (2015) - Figure 5: Tensile-compression fatigue properties of CCC and ESR spring steel, tempered at 475°C. Mechanical and toughness properties After vacuum heat treatment hardness of both CCC and ESR spring steel specimens was more or less the same. Keywords: ccc; crack; esr; fatigue; microstructure; properties; specimens; spring; spring steel; steel
• Crack path predictions and experiments in plane structures considering anisotropic properties and material interfaces by Judt, P.O.; Ricoeur, A. (2015) - In many engineering applications special requirements are directed to a material's fracture behavior and the prediction of crack paths. Especially if the material exhibits anisotropic elastic properties or fracture toughnesses, e.g. in textured or composite materials, the simulation of crack paths is challenging. Keywords: crack; forces; global; integrals; integration; material; path; tip
• Analytical model of asymmetrical Mixed-Mode Bending test of adhesively bonded GFRP joint by Ševcík, M.; Hutar, P.; Vassilopoulos, A. P.; Shahverdi, M. (2015) - 5a contains ratio of total strain energy release rate calculated by Eq. 5b shows comparison of total strain energy release rate calculated by Eq. (10) and by Eq. Keywords: crack; energy; fracture; mmb; mode; path; propagation; rate; release; strain
• Modelling 3D crack propagation in ageing graphite bricks of Advanced Gas-cooled Reactor power plant by Vo, Thi-Tuyet-Giang; Martinuzzi, Philippe; Tran, Van-Xuan; McLachlan, Neil; Steer, Alan (2015) - CRACK PROPAGATION IN AGEING GRAPHITE BRICKS Algorithms of crack propagation in ageing graphite bricks using X-FEM he analysis is done in two steps (see Fig. 2). This method of crack propagation allows many steps of crack propagation to be performed using a single mesh and enables a more accurate calculation of the stress intensity factors and the strain energy release rate around the crack front. Keywords: bricks; code_aster; crack; crack propagation; energy; fem; graphite; propagation
• In situ observation of rolling contact fatigue cracks by laminography using ultrabright synchrotron radiation by Nakai, Y.; Shiozawa, D.; Kikuchi, S.; Sato, K.; Obama, T. (2015) - In situ observation of rolling contact fatigue cracks by laminography using ultrabright synchrotron radiation Y. Nakai, D. Shiozawa, S. Kikuchi, K. Sato, T. Obama Department of Mechanical Engineering, Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan nakai@mech.kobe-u.ac.jp T. Makino, Y. Neishi Nippon Steel & Sumitomo Metal Corporation, Japan ABSTRACT. [9] Shiozawa, D., Makino, T., Neishi, Y., Nakai, Y., Observation of rolling contact fatigue cracks by laminography using ultra-bright synchrotron radiation, Procedia Materials Science, 3 (2014) 154-164. Keywords: crack; cycles; flaking; inclusions; rolling; surface
• The concept of the average stress in the fracture process zone for the search of the crack path by Matvienko, Yu.G.; Semenova, M.M. (2015) - [8] Matvienko, Yu.G., Maximum average tangential stress criterion for prediction of the crack path, Int. Crack path; Maximum average tangential stress; T-stress; Mixed mode; Rolling-sliding. Keywords: contact; crack; criterion; fracture; mats; stress
• Evaluation of near-threshold fatigue crack propagation in Ti-6Al-4V Alloy with harmonic structure created by Mechanical Milling and Spark Plasma Sintering by Kikuchi, S.; Imai, T.; Kubozono, H.; Nakai, Y.; Ueno, A.; Ameyama, K. (2015) - After testing, fracture surfaces were observed using scanning electron microscope (SEM), and crack profiles were analyzed using electron backscatter diffraction (EBSD) to discuss the mechanism of fatigue crack propagation. The grain size strongly influences the behaviors of fatigue crack propagation and crack closure of Ti-6Al-4V alloy; the fine grains reduce the value of Kcl. Keywords: crack; fatigue; harmonic; intensity; series; stress; structure; kth
• Fracture mechanics of pseudoelastic NiTi alloys: review of the research activities carried out at University of Calabria by Maletta, C.; Furgiuele, F.; Sgambitterra, E. (2012) - [15] T http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.23.02&auth=true C. Maletta et alii, Frattura ed Integrità Strutturale, 23 (2013) 13-24; DOI: 10.3221/IGF-ESIS.23.02 16 Several simulations have been carried out for different thermo-mechanical loading conditions as well as by varying the main thermo-mechanical parameters of the alloy, in terms of transformation strain ( L ) and transformation stresses (σAMS and σAMf ). In particular, a reduction of about 20% is observed in the temperature range between 273 K and 343 K, which correspond to a range of transformation stress between about 90 MPa and 800 MPa. Keywords: crack; fig; fracture; region; specimens; strain; stress; temperature; tip; transformation
• Influence of vacuum carburizing treatment on fatigue crack growth characteristic in DSG2 by Nambu, K.; Egami, N. (2015) - However, crack progress is affected by the influence of base metal part, and progress is controlled. This reason is considered that crack progress was controlled because the opening of the crack was barred by the crack closure effect by the compressive residual stress given to the carburizing layer. Keywords: carburizing; crack; fatigue; layer; material; progress; speed; surface
• Crack propagation in fracture mechanical graded structures by Schramm, B.; Richard, H.A. (2015) - In this context, the developed TSSR-concept is presented which allows the prediction of crack propagation in fracture mechanical graded structures considering the loading situation (Mode I, Mode II and plane Mixed Mode) and the material gradation. Hence, a change in the crack growth rate da/dN and possibly of the direction of crack propagation might occur due to the fact that the crack takes the path of least resistance. Keywords: crack; crack growth; fracture; gradation; growth; material; propagation; transition
• Kinetics of fatigue crack growth and crack paths in the old puddled steel after 100-years operating time by Lesiuk, G.; Szata, M. (2015) - In order to evaluate the sub-critical period of fatigue crack growth - it is necessary to know the material constants responsible for kinetic of fatigue crack growth rate (i.e. Paris law constants C and m). [6] Lesiuk, G., Szata, M., Fatigue properties and fatigue crack growth in puddled steel with consideration of microstructural degradation processes after 100-years operating time, XVII International Colloquium on Mechanical Fatigue of Metals (ICMFM17), Procedia Engineering, 74 (2014) 64–67. Keywords: crack; degradation; fatigue; ferrite; fracture; growth; operating; results; state; steel
• Experimental analysis of crack evolution in concrete by the acoustic emission technique by Saliba, J.; Loukili, A.; Regoin, J.P.; Grégoire, D.; Verdon, L.; Pijaudier-Cabot, G. (2015) - They considered that the length of the FPZ is equal to the zone where the local energy is superior to 15% of the total energy in the specimens or the region where the distribution of peak amplitude or AE energy is superior to 30% as the AE criterion to distinguish the failure zone. 0 10 20 30 40 50 60 70 80 0 1 2 3 4 5 W id th  o f  FP Z  (m m ) UN100                 UN200  SN200  LN200 Figure 6: The width of the FPZ for UN200, UN100, SN200 and LN200 beams THE AE BASED IB-VALUE he AE peak amplitude is related to the magnitude of cracks developed during fracture. Keywords: beams; concrete; crack; depth; fracture; length; notch
• Fatigue crack propagation in short-fiber reinforced plastics by Tanaka, K.; Oharada, K.; Yamada, D.; Shimizu, K. (2015) - The data of crack propagation rate correlated to the range of total energy release rate, Gtotal lie between the relations obtained for MD and TD. (5) All data of crack propagation rates tend to merge a single relation when the rate is correlated to the range of total energy release rate divided by Young’s modulus for various fiber angles and R ratios. 6 shows the relation between crack propagation rate and a parameter representing crack-tip opening radius, HIGI. Keywords: crack; energy; fiber; propagation; rate
• Crack growth simulation in heterogeneous material by S-FEM and comparison with experiments by Kikuchi, Masanori; Wada, Yoshitaka; Li, Yulong (2015) - One is crack growth in bi-materila made of CFRP plate and Aluminum alloy. Second problem is crack growth in bi- material made of PMMA and Aluminum alloy. Keywords: boundary; crack; fem; growth; material; phase; simulation; stress
• Effect of inhomogeneous distribution of non-metallic inclusions on crack path deflection in G42CrMo4 steel at different loading rates by Henschel, S.; Krüger, L. (2015) - Microsoft Word - numero_34_art_35 S. Henschel et alii, Frattura ed Integrità Strutturale, 34 (2015) 326-333; DOI: 10.3221/IGF-ESIS.34.35 326 Focussed on Crack Paths Effect of inhomogeneous distribution of non-metallic inclusions on crack path deflection in G42CrMo4 steel at different loading rates S. Henschel, L. Krüger Institute of Materials Engineering, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Str. 5, 09599 Freiberg, Germany sebastian.henschel@iwt.tu-freiberg.de ABSTRACT. An inhomogeneous distribution of non-metallic inclusions can result from the steel casting process. Keywords: blunting; cast; crack; doi; fracture; inclusions; loading; path; tip; void
• Effect of defect length on rolling contact fatigue crack propagation in high strength steel by Makino, T.; Neishi, Y.; Shiozawa, D.; Neishi, Y.; Shiozawa, D.; Kikuchi, S.; Okada, S.; Kajiwara, K.; Nakai, Y. (2015) - Microsoft Word - numero_34_art_36 T. Makino et alii, Frattura ed Integrità Strutturale, 34 (2015) 334-340; DOI: 10.3221/IGF-ESIS.34.36 334 Focussed on Crack Paths Effect of defect length on rolling contact fatigue crack propagation in high strength steel T. Makino, Y. Neishi Nippon Steel & Sumitomo Metal Corporation, Japan makino.hb3.taizo@jp.nssmc.com, neishi.58e.yutaka@jp.nssmc.com D. Shiozawa, S. Kikuchi, S. Okada Kobe University, Japan shiozawa@mech.kobe-u.ac.jp, kikuchi@mech.kobe-u.ac.jp K. Kajiwara Japan Synchrotron Radiation Research Institute, Japan kajiwara@spring8.or.jp Y. Nakai Kobe University, Japan nakai@mech.kobe-u.ac.jp ABSTRACT. The objective of the present paper is to clarify the effect of defect length in depth direction on rolling contact fatigue (RCF) crack propagation in high strength steel. Keywords: contact; crack; defect; length; rcf; rolling; stress
• Graphene as a model system for 2D fracture behavior of perfect and defective solids by Hess, P. (2015) - Atomic-scale mechanisms of fracture pathways in graphene Elucidation of the elementary steps of graphene fracture by first-principles calculations and experimental investigations employing high-resolution imaging are largely lacking. The Griffith relation, assuming linear behavior of the stress–strain relationship and neglecting lattice trapping, allows a reasonable description of graphene fracture initiated by crack-like defects as small as 1 nm in size. Keywords: bond; crack; fracture; graphene; length; model; properties; strength
• Fatigue crack paths and properties in A356-T6 aluminum alloy microstructurally modified by friction stir processing under different conditions by Tajiri, A.; Uematsu, Y.; Kakiuchi, T.; Suzuki, Y. (2015) - EBSD analyses revealed that the higher tool rotational speed resulted in the severer texture having detrimental effects on fatigue crack initiation and propagation resistances. Especially, in H specimen, the shape of fatigue crack path corresponds well with the onion ring patterns in Fig.2(b). Keywords: crack; fatigue; fsp; specimen; texture; tool
• Understanding the edge crack phenomenon in ceramic laminates by Ševe?ek,, O.; Kotoul, M.; Leguillon, D.; Martin, E.; Bermejo, R. (2015) - Another approach to increase strength has been to introduce compressive residual stresses at the surface. Among all, laminates designed with strong interfaces and compressive residual stresses have led to an increase in fracture energy, thermal shock resistance and, in some cases, a decrease in the sensitivity of the material strength to the different size of defects. Keywords: amz; ceramic; compressive; crack; edge; energy; laminates; layer; strength; stresses
• Investigation of crack paths in natural fibre-reinforced composites by Keck, S.; Fulland, M. (2015) - By means of the geometry correction factor functions it is possible to calculate values of the stress intensity factor and obtain fatigue crack growth rate curves for different fibre directions. Subsequently, fibre volume fraction and fibre direction are named. Keywords: crack; direction; fatigue; fibre; specimens; stress
• On the crack path under mixed mode loading on PUR foams by Marsavina, L.; Linul, E.; Voiconi, T.; Constantinescu, D. M.; Apostol, D. A. (2015) - [16] presented results mixed mode fracture toughness of PUR foams. [16] Linul, E., Voiconi, T., Marsavina, L., Determination of mixed mode fracture toughness of PUR foams, Structural Integrity and Life, 14 (2014) 87-92. Keywords: crack; density; foams; fracture; k k; mode; specimens; toughness;  
• Degenerated graphite nodules influence on fatigue crack paths in a ferritic ductile cast iron by Iacoviello, Francesco; Di Cocco, Vittorio (2015) - In this work, a ferritic DCI with degenerated nodules was obtained by means of an annealing treatment and the fatigue crack propagation resistance was investigated by means of fatigue crack propagation tests performed according to ASTM E647, focusing on the influence of degenerated graphite nodules on the fatigue crack paths. As a result of this heat treatment, a ferritic matrix with degenerated graphite nodules embedded was obtained (Fig. Keywords: crack; dci; fatigue; graphite; nodules; propagation
• Fatigue crack micromechanisms in a Cu-Zn-Al shape memory alloy with pseudo-elastic behavior by Di Cocco, Vittorio; Iacoviello, Francesco; Natali, Stefano; Brotzu, Andrea (2015) - Cu Zn Al Other 72.20 21.71 5.77 0.32 Table 1: Chemical composition of Cu-Zn-Al investigated alloy. Shape memory property characterizes the behavior of many Ti based and Cu based alloys (SMAs). Keywords: crack; fatigue; propagation
• Multiscale study of fracture in aluminum-magnesium alloy under fatigue and dynamic loading by Oborin, Vladimir; Bannikov, Mikhail; Naimark, Oleg; Sokovikov, Mikhail; Bilalov, Dmitry (2015) - The New-View scanning was realized over the zones of fatigue crack growth (Fig. 2a) and one-dimensional profiles of the surface relief were made in the radial direction starting from zone 1 to zone. [2] (and presently referred to as the Paris law) reflect the self-similar nature of fatigue crack kinetics. Keywords: crack; fatigue; fracture; samples; surface; zone
• Growth behavior of fatigue cracks in ultrafine grained Cu smooth specimens with a small hole by Goto, Masahiro; Morita, Kakeru; Kitamura, Junichi; Yamamoto, Takaei; Baba, Masataka; Han, Seung-zeon; Kim, Sangshik (2015) - The tensile-mode deformation reflected by large FI values should play the role of crack growth. The objective of this study is to investigate the physical background of the formation mechanism of crack growth paths in the HCF and LCF regimes in terms of the mixed-mode deformation at the crack tip. Keywords: crack; direction; fatigue; grain; growth; plane; plane crack; stress; surface
• Some practical crack path examples by Pook, Les P. (2013) - The forthcoming ESIS International Conference on Crack Paths (CP 2006) will be devoted to consideration of crack paths at various scales. They have been chosen to illustrate various aspects of crack paths. Keywords: crack; fatigue; figure; fracture; growth; notch; path
• Fatigue crack growth in additive manufactured products by Riemer, A.; Richard, H. A.; Brüggemann, J.-P.; Wesendahl, J.-N. (2015) - Selective Laser Melting; Fatigue crack growth; Threshold value; Lightweight structure; Residual lifetime. Finally, the strong impact of heat treatment on the residual lifetime was demonstrated by numerical fatigue crack growth simulations. Keywords: crack; fig; growth; manufacturing; material; process; slm; stresses; ti-6
• Effect of centrifugal load on crack path in thin-rimmed and webbed gears by Curà, F.; Mura, A.; Rosso, C. (2015) - Microsoft Word - numero_34_art_50 F. Curà et alii, Frattura ed Integrità Strutturale, 34 (2015) 447-455; DOI: 10.3221/IGF-ESIS.34.50 447 Focussed on Crack Paths Effect of centrifugal load on crack path in thin-rimmed and webbed gears F. Curà, A. Mura, C. Rosso Politecnico di Torino, Italy francesca.cura@polito.it, andrea.mura@polito.it, carlo.rosso@polito.it ABSTRACT. Results shows that both crack initiation point and crack propagation path are strongly influenced by centrifugal load; this effect is mainly evident in the uncertainty zone of the backup ratio. Keywords: bending; crack; load; propagation; stress; tooth
• Combined lock-in thermography and heat flow measurements for analysing heat dissipation during fatigue crack propagation by Baer, J.; Vshivkov, A.; Plekhov, O. (2015) - For crack length measurement a DC potential drop method was used. A method for quantitative heat flow measurement during fatigue experiments based on Peltier elements was developed by Prokhorov et al. Keywords: amplitude; crack; flow; heat; length; thermography
• Crack growth behavior of aluminum alloy 6061 T651 under uniaxial and biaxial planar testing condition by Henkel, S.; Liebelt, E.; Biermann, H.; Ackermann, S. (2015) - A phase change of 45° did not change crack growth significantly compared with proportional load. Fracture mechanics; Fatigue; Crack growth; Cruciform sample; Crack branching. Keywords: axes; crack; direction; fatigue; fig; growth; loading; stress
• Crack mode and life of Ti-6Al-4V under multiaxial low cycle fatigue by Itoh, Takamoto; Sakane, Masao; Morishita, Takahiro; Nakamura, Hiroshi; Takanashi, Masahiro (2015) - Stress path Maximum stress (MPa) Besides the method above, this paper also employs principal stress ratio, λ, and the principal strain ratio, , to define multiaxial stress and strain states, which are equated in Eq. Keywords: axial; biaxial; crack; failure; fatigue; life; loading; principal; specimen; strain; stress; test; testing; type
• Crack initiation and propagation on the polymeric material ABS (Acrylonitrile Butadiene Styrene), under ultrasonic fatigue testing by Domínguez Almaraz, G. M.; Correa Gómez, E.; Verduzco Juárez, J.C.; Avila Ambriz, J.L. (2015) - The measured temperature at the specimen neck section during fatigue testing was close to 33 C. Assuming mechanical domain under the described conditions, it is expected that the low increase on yield stress of testing material during ultrasonic fatigue testing is a combination of aging and rejuvenation processes 11, 12; even though, the last process is not fully recognized 13. G. M. Domínguez Almaraz et alii, Frattura ed Integrità Strutturale, 34 (2015) 498-506; DOI: 10.3221/IGF-ESIS.34.55 502 ULTRASONIC FATIGUE RESULTS ON POLYMER ABS xperimental ultrasonic fatigue results for this polymer are shown in Fig. Crack initiation and propagation have been investigated on the polymeric material ABS (Acrylonitrile Butadiene Styrene), under ultrasonic fatigue testing. Keywords: crack; doi; fatigue; polymer; specimen; stress; testing; water
• Paths of interactive cracks in creep conditions by Nowak, K. (2015) - 2c the length of initial central cracks are assumed to yield the same critical elastic load as in the case of central crack and equals to 18 mm (SIF is equal to 12.3 MPam0.5, too). The analysis of crack propagation allows for determination of a distance between initial cracks for which the interaction between them is negligible. Keywords: crack; creep; damage; failure; fig; stress; structure; time
• DBEM crack propagation for nonlinear fracture problems by Citarella, R.; Giannella, V.; Lepore, M. (2015) - DBEM Crack propagation for the combined bending + press fit load case The crack propagation simulation is splitted in 16 steps, with an average crack advance at each step equal to 0.5 mm, and with a fully automatic remeshing at each crack advance. Dual boundary element analysis of crack growth. Keywords: bending; case; crack; dbem; fit; load; press
• Crack path and fracture surface modifications in cement composites by Ahmad, Sajjad; Tulliani, Jean Marc; Ferro, Giuseppe Andrea; Khushnood, Rao Arsalan; Restuccia, Luciana; Jagdale, Pravin (2015) - Microsoft Word - numero_34_art_58 S. Ahmad et alii, Frattura ed Integrità Strutturale, 34 (2015) 524-533; DOI: 10.3221/IGF-ESIS.34.58 524 Focussed on Crack Paths Crack path and fracture surface modifications in cement composites Sajjad Ahmad Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, C.so Duca degli Abruzzi, 24-10129, Torino Italy Department of Civil Engineering, Institute of Southern Punjab, 9-km, Bosan road, Multan, Pakistan Sajjad.ahmad@polito.it, pc277sajjad@gmail.com Jean Marc Tulliani Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi, 24-10129, Torino Italy jeanmarc.tulliani@polito.it Giuseppe Andrea Ferro, Rao Arsalan Khushnood, Luciana Restuccia Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, C.so Duca degli Abruzzi, 24-10129, Torino Italy ferro@polito.it, rao.khushnood@polito.com, Luciana.restuccia@polito.it Pravin Jagdale Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi, 24-10129, Torino Italy pravin.jagdale@polito.it ABSTRACT. Cement composites are quasi-brittle in nature and possess extremely low tensile strength as compared to their compressive strength. Keywords: cement; coconut; composites; crack; doi:10.1016; inert; matrix; micro; particles; samples; shells; strength
• Modified fracture properties of cement composites with nano/micro carbonized bagasse fibers by Khushnood, Rao Arsalan; Ahmad, Sajjad; Ferro, Giuseppe Andrea; Restuccia, Luciana; Tulliani, Jean Marc; Jagdale, Pravin (2015) - Figure 5: Typical load-CMOD curves for cement composites with and without CRBF particles additions Figure 6: Microsoft Word - numero_34_art_59 R. A. Khushnood et alii, Frattura ed Integrità Strutturale, 34 (2015) 534-542; DOI: 10.3221/IGF-ESIS.34.59 534 Focussed on Crack Paths Modified fracture properties of cement composites with nano/micro carbonized bagasse fibers Rao Arsalan Khushnood Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Torino Italy National University of Sciences and Technology, Islamabad, Pakistan rao.khushnood@polito.it, rao_nust@yahoo.com Sajjad Ahmad Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Torino Italy Institute of Southern Punjab, Multan, Pakistan sajjad.ahmad@polito.com Giuseppe Andrea Ferro, Luciana Restuccia Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Torino Italy ferro@polito.it, Luciana.restuccia@polito.it Jean Marc Tulliani, Pravin Jagdale Department of Applied Science and Technology, Politecnico di Torino, Torino Italy jeanmarc.tulliani@polito.it, pravin.jagdale@polito.it ABSTRACT. Keywords: bagasse; cement; composites; crack; crbf; fibers; fracture; micro; nano; particles; properties; toughness
• On the decay of strength in Guilin red clay with cracks by Li, Yi; Zhang, Keneng; Liu, Baochen; Pan, Zongyuan (2015) - TESTING METHODS Samples he red clay samples were taken from the Guilin Yan Mountain. We should pay attention to the influence of red clay cracks on the stability in the area of slope and foundation excavation, as it may lead to free face collapse, ground subsidence and other geological mishaps. Keywords: clay; crack; dimension; sample; soil; strength
• Effects of large amounts of hydrogen on the fatigue crack growth behavior of torsional prestrained carbon steel by Matsuda, Yuta; Nishiguchi, Hiroshi; Fukuda, Takayuki (2015) - Hydrogen content, CH, increased with torsional prestrain for both S10C and S25C steels; the CH of the torsional prestrained S25C steel precharged with hydrogen was lower than that of S10C at the same torsional prestrain. A hydrogen content threshold was found; hydrogen content above this limit enhances the growth of the non-propagated crack, even for metals with lower hardness (HV < 200). Keywords: crack; fatigue; growth; hydrogen; s10c; s25c; steel; torsional
• Fatigue crack growth behavior of Inconel 718 produced by selective laser melting by Konecná, R.; Kunz, L.; Nicoletto, G.; Baca, A. (2015) - The plastic blunting model of crack growth can be considered as appropriate for crack advance description at high crack growth rates. The mechanism of fatigue crack growth was discussed in terms of the specific microstructure produced by selective laser melting. Keywords: crack; crack growth; fatigue; fig; fracture; growth; inconel; laser; microstructure; region; slm; threshold
• Fatigue crack growth under remote and local compression – a state-of-the-art review by Chahardehi, A.; Mehmanparast, A. (2015) - Fatigue crack growth; Compressive stress; Closure; R-ratio; Paris law; Design codes. INTRODUCTION ost common engineering predictions of fatigue crack growth (FCG) rate demand a high level of accuracy. Keywords: crack; crack growth; doi; effect; fatigue; fatigue crack; growth; loading; ratio; stress; stresses
• Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture by Bannikov, M.V.; Naimark, O. B.; Oborin, V.A. (2015) - Mechanisms of initiation and propagation of fatigue cracks were investigated by means of qualitative and quantitative analysis of the morphology of fracture surfaces. Figure 9: New view image of 2D- profile fracture surface of Ti Grade-4 with fatigue crack initiated from surface of the specimen. Keywords: crack; fatigue; fracture; gigacycle; grain; initiation; roughness; size; state; surface
• Experimental study of heat dissipation at the crack tip during fatigue crack propagation by Vshivkov, A.; Iziumova, A.; Plekhov, O.; Bär, J. (2015) - Contact heat flux sensors were made for each type of the sample. Figure 3: Calibration graph of heat flow sensors. Keywords: crack; fatigue; fig; flux; heat; peltier; sample; sensor
• Numerical study of crack path by MMCG specimen using M integral by El Kabir, S.; Moutou Pitti, R.; Recho, N.; Lapusta, Y.; Dubois, F. (2015) - S. El Kabir et alii, Frattura ed Integrità Strutturale, 35 (2016) 64-73; DOI: 10.3221/IGF-ESIS.35.08 65 INTRODUCTION ivil engineering and mechanical structures are usually submitted to mixed mode loading. The numerical analyses of crack path under mixed mode loading are performed as function of contour integral. Keywords: crack; energy; growth; integral; mmcg; mode; rate; release; specimen
• Mechanism of crack branching in the fatigue crack growth path of 2324-T39 Aluminium alloy by Songsong, Lu; Rui, Bao; Ting, Zhang; Binjun, Fei (2015) - EXPERIMENTS hree kinds of crack growth tests were carried out to investigate the crack growth behavior in 2324-T39, i.e. tests with M(T) specimen of 4.5mm in thickness under spectrum loading (stated as test type I), tests with relatively small specimens of 1.5mm in thickness with single edge notch under constant amplitude loading(stated as test type II), and in-situ scanning electron microscope (SEM) crack growth tests under constant amplitude loading(stated as test type III). Fatigue crack growth; Crack path branching; Mechanism analysis; 2324-T39 aluminium alloy. Keywords: branching; crack; fatigue; fig; growth; loading; specimen; t39; test; type
• Microstructure dependence of fatigue crack propagation behavior in wrought magnesium alloy by Morita, S.; Fujiwara, S.; Hori, T.; Hattori, N.; Somekawa, H.; Mayama, T. (2015) - The orientation dependence of fatigue crack propagation behavior of magnesium single crystals [15-17], and the effect of grain size [18-21] and texture Loading axes were parallel to the rolling direction; fatigue cracks propagated parallel to the transverse direction (L-T specimen), parallel to the short transverse direction (L-S specimen). Keywords: alloy; crack; direction; fatigue; magnesium; mater; specimen
• Crack initiation characteristics and fatigue property of a high-strength steel in VHCF regime under different stress ratios by Liu, Xiaolong; Sun, Chengqi; Hong, Youshi (2015) - For low-cycle and high-cycle fatigue, Goodman formula and Gerber formula are usually used to correlate stress ratio and fatigue strength. Moreover, the effect of inclusion size on fatigue life is discussed with the results showing that the effect of stress ratio and inclusion size on fatigue strength is well described by our proposed formula. Keywords: crack; doi; fatigue; fatigue strength; fga; formula; inclusion; initiation; ratio; strength; stress
• A non-linear procedure for the numerical analysis of crack development in beams failing in shear by Bernardi, P.; Cerioni, R.; Michelini, E.; Sirico, A. (2015) - [13] Darwin, D., Pecknold, D.A., Non-linear biaxial stress–strain law for concrete, J. Engng. [24] Bernardi, P., Cerioni, R., Michelini, E., Numerical modeling of bond in cracked reinforced concrete elements, in: J.W. Cairns et al. Keywords: analysis; beams; behavior; concrete; crack; failure; max; model; non; numerical; stress
• Prediction of three-dimensional crack propagation paths taking high cycle fatigue into account by Dhondt, Guido (2015) - [6] Forman, R.G., Kearney V.E., Engle R.M., Numerical analysis of crack propagation in cyclic-loaded structures, Transactions of the ASME, J. Basic Engng., (1967) 459-464. CONCLUSIONS method was presented how to alter a procedure capable of calculating LCF crack propagation in order to take HCF due to superimposed vibrations into account. Keywords: crack; hcf; loading; mission; mode; point; propagation
• Surface crack growth subject to bending and biaxial tension-compression by Shlyannikov, V.; Tumanov, A.; Zakharov, A.; Gerasimenko, A. (2015) - Surface crack; Biaxial loading; Bending; Crack growth. The fatigue growth analysis of surface cracks is one of the most important elements for structural integrity prediction of the flat metallic components in the presence of initial and accumulated operation damages. Keywords: bending; biaxial; constraint; crack; crack growth; growth; loading; parameter; plastic; specimens; stress; surface; surface crack
• Welding sequence effects on residual stress distribution in offshore wind monopile structures by Mehmanparast, Ali; Adedipe, Oyewole; Brennan, Feargal; Chahardehi, Amir (2015) - Residual stresses are often inevitably introduced into the material during the fabrication processes, such as welding, and are known to have significant effects on the subsequent fatigue crack growth behavior of welded structures. Welding sequence; Offshore wind monopole; Residual stress; Fatigue crack growth. Keywords: crack; fig; peak; plates; sequence; stress; stresses; tensile; thickness; welding
• Controlling fatigue crack paths for crack surface marking and growth investigations by Barter, S.; White, P.; Burchill, M. (2015) - The aim of this work was to firstly generate short- crack constant amplitude growth data and secondly, through the careful manipulation of the applied loading, to achieve a greater understanding of the mechanisms of fatigue crack growth in the material being investigated. [15] Forsyth, P. J. E., A two stage process of fatigue crack growth. Keywords: barter; crack; fatigue; fig; fracture; grain; growth; loading; path; slip; sub; surface
• Fatigue crack initiation and propagation in lotus-type porous material by Glodež, S.; Dervaric, S.; Kramberger, J.; Šraml, M. (2015) - Lotus-type porous structures; Fatigue crack initiation; Fatigue crack propagation; Numerical analysis. Figure 7: Schematic procedure of crack propagation period in a cross section No. 1. Keywords: crack; cross; distribution; fatigue; initiation; lotus; period; pores; propagation; stress; type
• Experimental estimation of the heat energy dissipated in a volume surrounding the tip of a fatigue crack by Meneghetti, G.; Ricotta, M. (2015) - Making use of Eq. (6), it is obtained: * ( , )1 m L r R T r Q z R d f V r                 (7b) [6] Plekhov, O., Fedorova, A., Kostina, A., Panteleev, I., Theoretical and experimental study of strain localization and energy dissipation at fatigue crack tip, Procedia Materials Science, 3 (2014) 1020-1025. Keywords: crack; doi; energy; fatigue; fig; heat; material; mpa·m0.5; temperature; tip; volume
• Multiaxial fatigue crack path prediction using critical plane concept by Albinmousa, Jafar (2015) - In this paper, fatigue experiments that involve careful measurement of fatigue crack were reviewed. Projected length and angle were used to characterize fatigue crack. Keywords: crack; fatigue; growth; length; max; plane; shear; strain
• Fatigue characterization of a crankshaft steel: Use and interaction of new models by Blasón, Sergio; Rodríguez, Cristina; Fernández-Canteli, Alfonso (2015) - MODEL FOR CRACK GROWTH RATE CURVE he fracture mechanics based approach, based on the application of crack growth rate curves, can be applied as an alternative to the approach based on stresses, i.e., that being related to the S-N field, due to its more general applicability to lifetime prediction of mechanical and structural components. [7] Castillo, E., Fernández Canteli, A., Siegele, D., Obtaining S-N curves from crack growth curves. Keywords: crack; crack growth; curve; fatigue; field; growth; growth rate; log; rate; stress
• Crack path in aeronautical titanium alloy under ultrasonic torsion loading by Nikitin, A.; Bathias, C.; Palin-Luc, T.; Shanyavskiy, A. (2015) - Results of ultrasonic tests on high-strength aluminum shows that torsion fatigue crack in VHCF regime have a qualitative similarity to crack in HCF regime [9]. In the case of surface torsion crack it can be observed macroscopically at surface in one of two maximum shear stress planes: along or perpendicularly to specimen’s axis. Keywords: alloy; case; crack; fatigue; growth; initiation; loading; stress; surface; titanium; torsion; vt3
• Crack growth threshold under hold time conditions in DA Inconel 718 – A transition in the crack growth mechanism by Fessler, E.; Pierret, S.; Andrieu, E.; Bonnand, V. (2015) - Aeroengine manufacturers have to demonstrate that critical components such as turbine disks, made of DA Inconel 718, meet the certification requirements in term of fatigue crack growth. DA Inconel 718; Fatigue crack growth; Hold time effect; Crack growth threshold; Intergranular to transgranular transition. Keywords: conditions; crack; crack growth; fatigue; fracture; growth; hold; regime; time; tip
• Fretting fatigue crack propagation rate under variable loading conditions by Gandiolle, C.; Fouvry, S. (2015) - It was introduced in 1957 by Barnette et Troiono to observe crack propagation in fatigue tests [8], and first applied on fretting fatigue test by Kondo et al. C. Gandiolle et alii, Frattura ed Integrità Strutturale, 35 (2016) 232-241; DOI: 10.3221/IGF-ESIS.35.27 239 Bloc σF,moy/σy-flat σF,alt/σy,flat Q*/P N (cycles) 1 0.78 0.85 0.3 70000 2 0.78 1 0.3 670000 3 0.78 0.85 0.15 1000000 Table 2: Fretting fatigue loadings and durations of the mixed load test blocks Figure 8: Keywords: arrest; contact; crack; fatigue; fig; loading; potential; propagation; rate; stress; test
• Crack path in liquid metal embrittlement: experiments with steels and modeling by Auger, T.; Hémery, S.; Bourcier, M.; Berdin, C.; Martin, M.; Robertson, I. (2015) - Figure 3: SEM micrograph of the brittle fracture surface of an AISI 1010 specimen tested in sodium T. Auger et alii, Frattura ed Integrità Strutturale, 35 (2016) 250-259; DOI: 10.3221/IGF-ESIS.35.29 255 Influence of the liquid metal species The role of the microstructure on LME crack path has been described with results in sodium liquid metal. Using state of the art characterization tools (Focused Ion Beam and Transmission Electron Microscopy) a clear understanding of crack path is emerging for these systems where a classical fractographic analysis fails to provide useful information. Keywords: crack; crack path; cracking; embrittlement; fig; fracture; grain; liquid; lme; metal; microstructure; path; sodium; steel; stress; surface
• A cohesive zone model to simulate the hydrogen embrittlement effect on a high-strength steel by Gobbi, G.; Colombo, C.; Vergani, L. (2015) - Hydrogen embrittlement; AISI 4130 steel; Toughness test; Cohesive zone model; Traction- separation law. Hydrogen embrittlement is mostly governed by this second diffusion coefficient. Keywords: concentration; crack; doi; elements; embrittlement; fracture; hydrogen; model; plane; steel; strain; stress; tsl
• Modelling of the fracture toughness anisotropy in fiber reinforced concrete by Tarasovs, S.; Kruminš, J.; Tamužs, V. (2015) - Steel fiber reinforced concrete is potentially very promising material with unique properties, which currently is widely used in some applications, such as floors and concrete pavements. 5.0E-04 1.0E-03 1.5E-03 2.0E-03 COD, mm L o a d , N Experiment FEM Figure 10: Load-crack opening displacement diagram of a four point bending test for steel fiber reinforced concrete. Keywords: concrete; crack; elements; fiber; fracture; model; point; steel
• Orientation of propagating crack paths emanating from fretting-fatigue contact problems by Giner, Eugenio; Díaz-Álvarez, José; Marco, Miguel; Miguélez, Mª Henar (2015) - In practice, computing KII values under crack face contact must include the effect of friction tractions on crack faces, as in [2,5], which can be cumbersome and prone to inaccuracies when using domain and contour integrals. The prediction has been performed numerically using FEM and X-FEM including a formulation that allows for crack face contact, which is essential to take into account the effects during the compressive part of the cycle. Keywords: angle; contact; crack; criterion; fatigue; fig; indenter; load; orientation; stress
• Influence of joint line remnant on crack paths under static and fatigue loadings in friction stir welded Al-Mg-Sc alloy by Besel, Y.; Besel, M.; Alfaro Mercado, U.; Kakiuchi, T.; Uematsu, Y. (2015) - Since the asperity of JLR fracture in the lower part of Fig. 13(b) was equivalent to the average grain size of weld-480 (1.67 µm), it is considered that the crack propagated intergranularly at JLR. Figure 11: Fatigue fracture surface of weld-480 tested at a = 220 MPa. Keywords: crack; fatigue; fig; fracture; friction; heat; input; jlr; stir; weld; weld-480; welding
• Sub-critical cohesive crack propagation with hydro-mechanical coupling and friction by Valente, S.; Alberto, A.; Barpi, F. (2015) - 10.3221/IGF-ESIS.35.35 312 [9] Shi, M., Zhong, H., Ooi, E.T., Zhang, C., Song, C., Modeling of crack propagation of gravity dams by scaled boundary polygons and cohesive crack model, International Journal of Fracture, Springer Netherlands, 183(1) (2013) 29-48. [6] Barpi, F., Valente, S., Size-effects induced bifurcation phenomena during multiple cohesive crack propagation, Int. Keywords: crack; dam; model; stage; stress; valente
• Fatigue failure analysis of pin-loaded lugs by Boljanovic, Slobodanka; Maksimovic, Stevan (2015) - [2] Schijve, J., Hoeymakers, S.H.M., Fatigue crack growth in lugs, Fatigue Eng. In: Fatigue crack growth under spectrum loads, ASTM STP 595 (1976) 320-336. Keywords: crack; factor; fatigue; growth; hole; intensity; loading; lug; stress
• Investigation of mixed mode - I/II fracture problems - Part 1: computational and experimental analyses by Demir, O.; Siriç, S.; Ayhan, A. O.; Lekesiz, H. (2015) - In this subsection, results from mixed mode fracture analyses are presented for different loading angles. In this subsection, results from mixed mode fracture analyses of a new type of mixed mod-I/II specimen, T-specimen, that has smaller dimensions compared to the regular CTS specimen are presented. Keywords: analyses; crack; cts; fracture; loading; mode; results; specimen
• Investigation of mixed mode-I/II fracture problems - Part 2: evaluation and development of mixed mode-I/II fracture criteria by Ayhan, A. O.; Demir, O. (2015) - K e K f K gK hK iK jK kK            (13) 0° loading case data is excluded as is the case with the development of equivalent SIF equation to develop the improved in-plane mixed mode-I/II crack deflection angle equation. [8] developed an in plane mixed mode criterion and proposed the following Eq. Keywords: crack; criteria; criterion; cts; deflection; fracture; loading; lt-01; mode; results; specimen
• Finite element modeling and experimental studies on mixed mode-I/III fracture specimens by Bozkurt, M.; Ayhan, A. O.; Yaren, M. F.; Siriç, S. (2015) - One of the basic types of mixed mode fracture is mode-I/III, in which both mode-I (opening) and mode-III (tearing) loads act near the crack region. However, there are still many problems that include mixed mode loading. Keywords: crack; fracture; iii; loading; mode; specimen; stress
• Multiple and non-planar crack propagation analyses in thin structures using FCPAS by Dündar, H.; Ayhan, A. O. (2015) - Leonel et.al used two-dimensional BEM method for multiple crack propagation analyses [4]. Under mixed mode conditions, multiple cracks growing in a nonplanar manner can even be more critical for the structure due to interaction effects. Keywords: analyses; crack; fcpas; fracture; growth; mode; propagation; stress
• Fatigue crack paths under the influence of changes in stiffness by Kullmer, G.; Schramm, B.; Richard, H. A. (2015) - CRACK PATHS FOR DIFFERENT ORIENTATIONS OF AN INCLUSION he simulated crack paths for different orientations angles of a change in stiffness modelled as an inclusion and the alignment of the inclusion for the extreme orientation angles α = 30° as well as α = 90° are presented in Fig. CRACK PATHS FOR STIFF CHANGES IN STIFFNESS ig. 7 shows crack paths through changes in stiffness due to doubling or halving Young´s modulus in partition P3. Keywords: angle; change; crack; crack paths; inclusion; modulus; orientation; region; stiffness
• Fatigue life prediction of pedicle screw for spinal surgery by Major, Š.; Kocour, V.; Cyrus, P. (2015) - The crack growth properties were measured on standard test method for measurement of fatigue crack growth rates introduced by ASTME 647. The crack growth properties were measured on Standard test method for measurement of fatigue crack growth rates introduced by ASTME 647 [9]. Keywords: crack; fatigue; fig; figure; length; model; pedicle; screw; stress; surface; thread
• Development of in-situ fatigue crack observing system for rotating bending fatigue testing machine by Lian, B.; Ueno, A.; Iwashita, T. (2015) - For verifying performance of this observing system, fatigue tests were carried out by using fatigue specimen having a small artificial defect. Figure 7: Shape and dimensions of fatigue specimen. Keywords: crack; fatigue; fig; observation; specimen; stroboscope; system
• Fatigue crack growth prediction in 2xxx AA with friction stir weld HAZ properties by Tzamtzis, A.; Kermanidis, A. T. (2015) - [5] Wu, S.-X., Mai Y.-W., Cotterell B., A model of fatigue crack growth based on Dugdale model and damage accumulation, International Journal of Fracture, 57 (3) (1992) 253-267. [6] Shi, K.K., Cai L.X., Chen L., Wu S.C., Bao C., Prediction of fatigue crack growth based on low cycle fatigue properties. Keywords: a250; a300; crack; cyclic; fatigue; growth; hardening; haz; material; properties; strain
• Crack path simulation for cylindrical contact under fretting conditions by Cardoso, R.A.; Araújo, J.A.; Ferreira, J.L.A.; Castro, F.C. (2015) - As the shear stress R.A. Cardoso et alii, Frattura ed Integrità Strutturale, 35 (2016) 405-413; DOI: 10.3221/IGF-ESIS.35.46 408 always has the same magnitude in two orthogonal planes, the chosen plane for crack propagation direction is the one that experiences the maximum Δσn (less frictional energy is lost). [14] Fouvry, S., Nowell, D., Nubiak, K., Hills, D.A., Prediction of fretting crack propagation based on a short crack methodology, Engineering Fracture Mechanics, 75 (2008) 1605-1622. Keywords: crack; direction; fatigue; fig; initiation; method; path; plane; propagation; stress
• The study of a defect evolution in iron under fatigue loading in gigacyclic fatigue regime by Plekhov, O.; Naimark, O. (2015) - Sample d, mm m, g , g/cm3 /, E, GPa i, 10-5 П0 5 4.65252 7.8667 0 186.2 63.0 П1 5 4.68843 7.8654 1.610-4 184.2 52.4 П2 5 4.63733 7.8533 1.710-3 184.4 52.5 П3 5 4.63920 7.8522 1.810-3 182.5 46.5 П4 5 4.50319 7.8522 1.810-3 169.0 890 Table 3: Physical and geometrical parameters of iron sample under investigation Fig. 3 presents the evolution of Young`s modulus as an exponential function of dilatation. CONCLUSION umming up the results of structural investigation of iron samples we can make several conclusions. Keywords: amplitude; crack; defect; dilatation; evolution; fatigue; initiation; regime; sample; specimen; stress; surface; volume
• Crack initiation and early propagation plane orientation of 2A12-T4 aluminum alloy under tension-torsion fatigue loading including mean tensile stress by Xinhong, Shi; Jianyu, Zhang; Qingshan, Xiao; Tianqi, Liu (2015) - Although there are two equal values of maximum shear stress amplitude planes and the normal mean stress on both planes is zero, all of the measured angles are in the side of the maximum shear stress plane, which direction is nearly 80°apart with the direction of specimen axial. With increasing of normal mean stress on both maximum shear stress amplitude planes, more cracks are becoming to initial and propagate from the side of maximum shear stress amplitude plane to the other side of maximum shear stress amplitude plane with larger normal mean stress. Keywords: amplitude; crack; mean; plane; shear; stress; stress amplitude
• Crack simulation models in variable amplitude loading - a review by Ricardo, Luiz Carlos H.; Miranda, Carlos Alexandre J. (2015) - The central problem in the successful utilization of fracture mechanic techniques applied to the fatigue spectrum is to obtain a clear understanding of T L. C. H. Ricardo et alii, Frattura ed Integrità Strutturale, 35 (2016) 456-471; DOI: 10.3221/IGF-ESIS.35.52 457 the influence of loading sequences on fatigue crack growth [2]. The ultimate goal of prediction models is to arrive at quantitative results of fatigue crack growth in terms of millimeters per year or some other service period. Keywords: amplitude; analysis; closure; crack; crack closure; crack growth; crack propagation; doi; element; eng; fatigue; fatigue crack; finite; fracture; growth; loading; mechanics; models; plane; propagation; strain; stress
• Damage of bamboo and wooden materials based on linear elastic fracture mechanics in garden design by Haiyan, Tang (2015) - To select out bamboo and wood suitable for garden landscaping and explore damage crack behavior and toughening mechanism of biomaterials comprehensively, this study performed theoretical derivation in combination with experiment to study damage crack mode of different kinds of woods and bamboos. We tested and analyzed mechanical performance of bamboo samples cut from bamboo wall along radial direction and bamboo fiber bundle isolated from bamboo materials with rule of mixture and shearing-lag theory. Keywords: bamboo; crack; damage; direction; emission; fiber; fracture; material; mechanics; mode; stress; test; wood
• Influence of different sizes of concrete and roller compacted concrete on double-K fracture parameters by Chunjiang, Liu; Huabo, Zhang; Ninghua, Lv (2015) - Concrete fracture toughness has size effect, that is to say, concrete fracture toughness increases as size of specimen increases; besides, crack-depth ratio affects concrete fracture toughness to some extent, but the influences are not all consistent. The rule to ordinary concrete is that concrete fracture toughness is reduced with the increase of crack-depth ratio, and the rule to RCC partially conforms to ordinary concrete rule. Keywords: concrete; crack; depth; fracture; ratio; rcc; size; specimen; toughness
• Residual strength evaluation by DBEM for a cracked lap joint by Citarella, R. (2015) - Kc is found to vary with crack length and component geometry and is applicable to thinner sections where stable crack growth can occur. The instability condition is reached when G = R and  dG dR da da , i.e. when the curves of G and R versus crack length are tangent to each other. Keywords: citarella; crack; curve; failure; fig; hole; load; stress; tip
• Static and fatigue experimental tests on a full scale fuselage panel and FEM analyses by Sepe, Raffaele; Armentani, Enrico; Caputo, Francesco (2015) - (1) is the octahedral shear stress, τoct:               2 2 2 1, 2, 3, 1, 2, 1, 3, 2, 3, 2 ( ) 3oct a a a a a a a a a (2) where σ1, σ2 and σ3 are the amplitudes of the alternating principle stresses. The constants λ and k may be easily determined from fatigue tests with a large R-ratio difference. Keywords: crack; cycles; failure; fatigue; figure; load; numerical; panel; sepe; strain; test
• Influence of temperature and exploitation period on fatigue crack growth parameters in different regions of welded joints by Camagic, Ivica; Vasic, Nemanja; Cirkovic, Bogdan; Burzic, Zijah; Sedmak, Aleksandar; Radovic, Aleksandar (2016) - Obtained values for parameters of Paris law,  md C K dN    a , i.e. coefficient C and exponent m, fatigue threshold Kth, and fatigue crack growth rate, da/dN, for K = 10 MPam, are given in Tabs. 5-9 for new and exploited PM, for new WM, and for new and exloited HAZ, respectively. I. Camagic et alii, Frattura ed Integrità Strutturale, 36 (2016) 1-7; DOI: 10.3221/IGF-ESIS.36.01 4 Specimen Temperature °C Fatigue threshold ΔKth Coefficient C Exponent m da/dN. m/cycle ΔK = 10 MPam PM-1-1n 20 5.9 5.70 · 10-12 2.98 5.44 · 10-9 PM-1-2n 5.6 5.38 · 10-12 3.02 5.63 · 10-9 PM-1-3n 5.8 6.23 · 10-12 2.83 4.21 · 10-9 PM-2-1n 540 5.2 1.52 · 10-10 2.94 1.32 · 10-7 PM-2-2n 5.1 2.08 · 10-10 2.88 1.58 · 10-7 PM-2-3n 5.0 1.11 · 10-10 2.99 1.08 · 10-7 Table 5: Fatigue crack growth parameters for specimens with notches in new PM. Fatigue crack growth parameters, threshold value Kth, coefficient C and exponent m, have been determined, both at room and exploitation temperature. Keywords: crack; fatigue; growth; new; temperature
• Experimental examination of fatigue life of welded joint with stress concentration by Arsic, Miodrag; Savic, Zoran; Sedmak, Aleksandar; Bosnjak, Srdjan; Sedmak, Simon (2016) - Other group of experiments comprised examinations of specimens with edge notch, prepared in accordance with ASTM E 399 for three points bending, in order to establish regularity between crack growth and range of exerted stress intensity factor aimed to determine resistance of welded joint to initial crack growth, namely fatigue threshold (ΔKth). Crack growth basically can be: stable, subcritical or unstable, whereas possibilities of crack growth may vary following one of the paths from 1 to 8, Fig. Keywords: crack; fatigue; growth; joints; log; relationship; specimens; strength; stress
• Fatigue life prediction of casing welded pipes by using the extended finite element method by Vuli?evi?, Ljubica Lazi?; Raji?, Aleksandar; Grbovi?, Aleksandar; Sedmak, Aleksandar; Šarko?evi?, Živ?e (2016) - As expected, crack growth was characterized by KI, since values of KII and KIII are negligible. 7 shows the crack growth at beginning (1st step - crack opening), whereas Fig. 8 shows crack growth after 7th step when the crack “breaks” through the wall. Keywords: crack; cycles; fig; growth; length; step
• Review of pressurized thermal shock studies of large scale reactor pressure vessels in Hungary by Fekete, Tamás (2016) - Although PTS calculations have been part of RPV safety evaluations since the first half of the 1980’s, there are various approaches that are analogous in general, but have many differences in details. Main features of the model used for PTS Structural Mechanics calculations:  For Structural Mechanics calculations, an analytical code was used [10], which had been validated with a Finite Element Code Keywords: calculations; crack; fracture; integrity; materials; mechanics; model; problem; pts; results; rpv; temperature
• Very high cycle fatigue strength and crack growth of thin steel sheets by Ouarabi, Mohand; Perez Mora, Ruben; Bathias, Claude; Palin-Luc, Thierry (2016) - On the other hand, the experiments on crack growth flat specimens of 1.2 mm thickness demonstrated that such thin samples can be tested at high frequencies (20 kHz). Ultrasonic fatigue; Plate steel fatigue; Fatigue resistance; Fatigue crack growth. Keywords: crack; fatigue; intensity; khz; specimen; steel; stress; tests
• Crack initiation and propagation paths in small diameter FSW 6082-T6 aluminium tubes under fatigue loading by Tovo, Roberto; Susmel, Luca; James, M. Neil; Hattingh, Danie G.; Maggiolini, Enrico (2016) - UNIAXIAL TENSILE FATIGUE TEST RESULTS able 1 shows the fatigue data obtained from welded tube specimens tested at R = 0.1 at frequencies between 10- 25 Hz. Test run-out was deemed to have occurred if the specimen survived 2,000,000 load cycles. Friction stir welding; Retractable tool; Crack initiation sites; Fatigue crack path. Keywords: crack; doi; fatigue; figure; friction; initiation; process; stir; tube; weld; welding
• Numerical simulation of dynamic brittle fracture of pipeline steel subjected to DWTT using XFEM-based cohesive segment technique by Talemi, Reza H. (2016) - INTRODUCTION oncerns have been raised that leaks in a CO2 pipeline could escalate to brittle fracture crack propagation, due to the large temperature drop associated with the expansion of dense phase CO2 to ambient conditions 102 103 0 0.1 0.2 0.3 0.4 0.5 [m/s] [‐] Figure 6: Calculated crack velocity versus normalized crack tip dynamic stress intensity factor. Keywords: behaviour; crack; damage; dwtt; element; fracture; initiation; model; pipeline; propagation; stress; xfem
• Multiple crack propagation by DBEM in a riveted butt-joint: a simplified bidimensional approach by Citarella, R. (2016) - Alternatively, the holes not directly involved by crack propagation can be modelled by just introducing longitudinal constraints on 180 degrees of the hole boundary and skipping the explicit pin modelling (Fig. 2b). 2a, holes with crack tips N. 1, 28, 29, 56) or at least strongly retard crack propagation [8]. Keywords: citarella; crack; dbem; doi; fig; hole; joint; propagation
• Effect of flexural crack on plain concrete beam failure mechanism A numerical simulation by Namdar, Abdoullah; Darvishi, Ershad; Feng, Xiong; Zakaria, Ideris; Yahaya, Fadzil Mat (2016) - Displacement, von Mises, load reaction, displacement- crack length, von Mises-crack length and von Mises-displacement of beams have been graphical depicted. It is observed that there are direct influences between crack length and displacement, von Mises and load reaction of the beam. Keywords: beam; crack; displacement; length; model; nsc; uhpc;  ;  
• Crack formation of steel reinforced concrete structure under stress in construction period by Zhu, Hua (2016) - Microsoft Word - numero_36_art_19 H. Zhu, Frattura ed Integrità Strutturale, 36 (2016) 191-200; DOI: 10.3221/IGF-ESIS.36.19 191 Crack formation of steel reinforced concrete structure under stress in construction period Hua Zhu College of Civil Engineering, Campus on Avenue Hope, Yancheng Institute of Technology, Yancheng, Jiangsu, China. zhuhuazh2233@163.com ABSTRACT. To obtain deformation rules of steel reinforced concrete structure under stress, this study explored the crack formation in construction period. Keywords: analysis; column; concrete; construction; crack; deformation; floor; load; stands; steel; structure; value
• Influence of the crack propagation rate in the obtaining opening and closing stress intensity factor by finite element method by Ricardo, Luiz Carlos H.; Miranda, Carlos Alexandre J. (2016) - The central problem in the successful utilization of fracture mechanic techniques applied to the fatigue spectrum is to obtain a clear understanding of the influence of loading sequences on fatigue crack growth The ultimate goal of prediction models is to arrive at quantitative results of fatigue crack growth in terms of millimeters per year or some other service period. Keywords: closure; crack; crack growth; crack propagation; doi; element; fatigue; finite; fracture; growth; loading; model; opening; plastic; propagation; stress; tip; zone
• Crack front segmentation under combined mode I- and mode IIIloading by Eberlein, A.; Richard, H. A. (2016) - Figure 5: Definition of characteristic dimensions for facet quantification: a) Schematic facet formation at the crack front due to τz; b) Other characteristic dimensions for facet quantification are the projected facet length d, the facet distance c and the width e of the bridging region B (see Fig. 5 b)). Keywords: crack; facet; fig; iii; loading; mode; specimen
• Numerical simulation of early-age shrinkage effects on RC member deflections and cracking development by Bernardi, P.; Cerioni, R.; Michelini, E.; Sirico, A. (2016) - To this aim, concrete shrinkage can be explicitly considered by treating it as a prescribed deformation or as a fictitious force in the analyses [5-9]. In more detail, concrete shrinkage is rigorously modelled by inserting it explicitly into 2D-PARC general algorithm as a prescribed deformation. Keywords: beams; concrete; crack; effects; numerical; reinforcement; shrinkage; v-01
• Multiaxial fatigue of in-service aluminium longerons for helicopter rotor-blades by Shanyavskiy, A.; Toushentsov, A. (2016) - [2] Shanyavskiy A.A., Quantitative fractographic analyses of fatigue crack growth in longerons of in-service helicopter rotor-blades. [4] Shanyavskiy A.A., Orlov E.F., Koronov M.Z., Fractographic analyses of fatigue crack growth in D16T alloy subjected to biaxial cyclic loads at various R-ratios. Keywords: blade; crack; equivalent; fatigue; flight; fracture; growth; longeron; service; stress
• Analysis of initial crack path in fretting fatigue by Vazquez, J.; Astorga, S.; Navarro, C.; Dominguez, J. (2016) - [15] Szolwinski, M.P., Farris, T.N., Mechanics of fretting fatigue crack formation, Wear, 198 (1996) 93-107. Now, clearly both, FS and SWT parameters, predict crack initiation paths that point toward the region beneath the contact. Keywords: contact; crack; fatigue; fig; initiation; parameter; path; plane
• The non-proportionality of local stress paths in engineering applications by Riess, C.; Obermayr, M.; Vormwald, M. (2016) - 3sign .           (8) This approach results in discontinuities in the time history when applied to non-proportional stresses. Size effects may have a large influence for notched components, but under non-proportional stresses they are not yet well defined. Keywords: crack; doi; fatigue; initiation; non; npf; optimization; parameter; proportionality; stress
• 3D-mixed-mode-loading: material characteristic values and criteria’s validity by Richard, H. A.; Eberlein, A. (2016) - As Fig. 1 exemplary shows on a boarder crack with the length a in a volume cube, different stresses causes various crack loadings (fracture modes). This contribution deals with the complex problem of crack growth under mixed-mode-loading. Keywords: crack; criterion; fracture; growth; loading; mode; richard; stress; threshold
• An all-in-one numerical methodology for fretting wear and fatigue life assessment by Llavori, I.; Urchegui, M.A.; Tato, W.; Gomez, X. (2016) - [9] McColl, I.R., Ding, J., Leen, S.B., Finite element simulation and experimental validation of fretting wear, Wear, 256 (2004) 1114-1127. [13] Cruzado, A., Leen, S.B., Urchegui, M.A., Gómez, X., Finite element simulation of fretting wear and fatigue in thin steel wires, Int. Keywords: contact; crack; fatigue; fretting; model; numerical; propagation; wear
• High cycle torsional fatigue properties of 17-4PH stainless steel by Yanase, K.; Shönbauer, B.M.; Endo, M. (2016) - Sensitivity to small defects under torsional fatigue loading condition is examined in the high cycle fatigue regime. As shown, the prediction for fatigue limit with k = 0 (Fig. Keywords: area; crack; defect; fatigue; limit; loading; stress; torsional
• Coupled fracture modes under anti-plane loading by P. Pook, Les; Berto, F.; Campagnolo, A. (2016) - Figure 2: Notation for crack tip stress field. On the basis of these results, and a mathematical argument, the results suggest that the stress field in the vicinity of a corner point is the sum of two singularities: one due to stress intensity factors and the other due to an as yet undetermined corner point singularity. KEYWORDS. Keywords: corner; crack; loading; mode; point; stress
• Experimental and analytical study of cracks under biaxial fatigue by Mokhtarishirazbad, M.; Lopez-Crespo, P.; Moreno, B.; Camas, D.; Lopez-Moreno, A.; Zanganeh, M. (2016) - [12] Patterson, E.A., Olden, E.J., Optical analysis of crack tip stress fields: a comparative study, Fatigue Fract Eng Mater Struct, 27 (2004) 623-635. doi:10.1016/0013-7944(87)90124-X. [8] Smith, J., Bassim, M.N., Liu, C.D., Measurement of crack tip strains using neutron diffraction. Keywords: cod; crack; cycle; displacement; fatigue; length; loading; lopez; overload; stress; tip
• Fatigue crack growth behavior under multiaxial variable amplitude loading by Gates, Nicholas R.; Fatemi, Ali; Iyyer, Nagaraja; Phan, Nam (2016) - Consequently, using the material data from literature is not expected to have a significant effect on the accuracy of crack growth predictions presented in the following section for either program. In general, the degree of conservatism in crack growth predictions tends to increase with decreasing stress levels. Keywords: amplitude; axial; crack; growth; history; loading; predictions; stress; torsion
• A plastic stress intensity factor approach to turbine disk structural integrity assessment by Shlyannikov, V.; Zakharov, A.; Yarullin, R. (2016) - The predictions of the rate of crack growth and residual lifetime of steam turbine disk are compared for elastic and elastic-plastic solutions. The predictions of the rate of crack growth and residual lifetime of steam turbine disk are compared for elastic and elastic-plastic solutions. Keywords: crack; disc; disk; fracture; growth; intensity; plastic; shlyannikov; steam; stress; turbine
• Two-parameter fracture model for cortical bone by Vantadori, Sabrina; Carpinteri, Andrea; Fortese, Giovanni; Ronchei, Camilla; Scorza, Daniela; Berto, Filippo (2016) - In cortical bone, it is represented by osteons (Fig. 1). [4] Li, S., Abdel-Wahab, A., Silberschmidt, V.V., Analysis of fracture processes in cortical bone tissue, Eng. Keywords: bone; cos; crack; doi; fracture; loading; mode; specimens; toughness
• Biaxial fatigue tests of notched specimens for AISI 304L stainless steel by Beretta, G.; Chaves, V.; Navarro, A. (2016) - However, despite all this work, it is a fact that the mechanisms of fatigue crack growth at notches are still not fully understood. FATIGUE LIMIT PREDICTIONS WITH THE MICROSTRUCTURAL MODEL avarro and de los Rios [12] developed a model for short fatigue cracks growing in un-notched bodies. Keywords: biaxial; crack; direction; fatigue; hole; loading; model; stress; tests
• Growth of long fatigue cracks under non-proportional loadings – experiment and simulation by Hos, Y.; Vormwald, M. (2016) - Several studies [11-15] have shown that J is a very F Y. Hos et alii, Frattura ed Integrità Strutturale, 37 (2016) 234-240; DOI: 10.3221/IGF-ESIS.37.31 235 successful parameter to model fatigue crack growth under proportional and non-proportional loadings, therefore an opportunity might arise to extend this solution to long cracks. REFERENCES [1] Zerres, P., Vormwald, M., Review of fatigue crack growth under non-proportional mixed-mode loading, Int. Keywords: crack; fatigue; growth; loading; mode; specimen
• On fatigue behavior of two spring steels. Part I: Wöhler curves and fractured surfaces by Angelova, D.; Yordanova, R.; Lazarova, T.; Yankova, S. (2016) - Surface short fatigue cracks are observed from origin to fracture by using acetate-foil replication technique, and their length, a, measured at the corresponding number of fatigue cycles, N. Those data are presented in plots “Crack lengths, a – Cycles, N” and a comparison made between both the steels. The observed cracks interaction on the fractured surface of Specimen 7 also can be indirectly confirmed by replica monitoring of surface propagation of short fatigue cracks, Fig. Keywords: crack; fatigue; fig; mpa; specimen; steel; surface; zone
• On fatigue behaviour of two spring steels. Part II: Mathematical models by Angelova, D.; Yordanova, R.; Lazarova, T.; Yankova, S. (2016) - n the present study, fatigue in two spring steels are investigated: (i) Steel EN10270-1SH/ DIN 17223C (Steel A) for conducting own fatigue experiments, [5, 6], and proposing new mathematical models of short fatigue crack growth; and (ii) BS250A53/DIN 55Si7 (Steel B) for using some already published results, [7], describing those results by the I I D. Angelova et alii, Frattura ed Integrità Strutturale, 37 (2016) 258-264; DOI: 10.3221/IGF-ESIS.37.34 259 newly-proposed mathematical models of short fatigue crack growth, and making comparative analysis with Steel A. Keywords: crack; fatigue; growth; model; mpa; psc; steel; version
• Experimental investigation of effect of specimen thickness on fracture toughness of Al-TiC composites by Raviraj, M. S.; Sharanaprabhu, C. M.; Mohankumar, G. C. (2016) - that the increase of TiC from 3wt% to 5wt% in Al6061 matrix composites, there will be a decrease in fracture toughness from 19.2 MPa√m to 16.4 MPa√m and further increase of TiC to 7wt% the M. S. Raviraj et alii, Frattura ed Integrità Strutturale, 37 (2016) 360-368; DOI: 10.3221/IGF-ESIS.37.47 366 fracture toughness increases slightly to 17.6 MPa√m. The Al-TiC MMCs occupy a unique position in the family of metal matrix composites as they find numerous applications in commercial aerospace, space technology, automobile, general industrial and engineering structures Keywords: al6061; composites; crack; fracture; matrix; ratios; specimens; tic; toughness
• A robust approach for the determination of Gurson model parameters by Sepe, R.; Lamanna, G.; Caputo, F. (2016) - [19]; once such critical values are overcome, the amount of elastic potential energy necessary for the voids nucleation is considered as reached. Within this scenario, the parallel spreading of advanced techniques of numerical simulation has allowed the development of numerical models with which it is possible to obtain very useful results for a better understanding of the physical phenomena involved in the macroscopic mechanisms of propagation. Keywords: crack; fracture; material; mean; model; nucleation; numerical; parameters; process; results; strain; value
• A study of white etching crack formation by compression-torsion experiments by Averbeck, S.; Kerscher, E. (2016) - A study of white etching crack formation by compression-torsion experiments S. Averbeck, E. Kerscher Materials Testing (AWP), University of Kaiserslautern, Gottlieb-Daimler-Strasse, 67663 Kaiserslautern, Germany stefan.averbeck@mv.uni-kl.de, kerscher@mv.uni-kl.de ABSTRACT. Citation: Averbeck, S., Kerscher., E., A study of white etching crack formation by compression-torsion experiments, Frattura ed Integrità Strutturale, 38 (2016) 12-18. Keywords: bearing; crack; fatigue; fracture; load; phase; specimens; stress; surface; testing; wec
• Stress-state dependent cohesive model for fatigue crack growth by Shravan Kumar, R.; Nijin, I.S.; Vivek Bharadwaj, M.; Rajkumar, G.; Banerjee, Anuradha (2016) - Citation: Shravan Kumar, R., Nijin, I. S., Vivek Bharadwaj, M., Rajkumar, G., Anuradha Banerjee, Stress-state dependent cohesive model for fatigue crack growth, Frattura ed Integrità Strutturale, 38 (2016) 19- 25. As an alternative to classical fracture mechanics based characterization of fatigue crack growth, the cohesive zone model (CZM) has been receiving increasing attention for modeling fatigue damage growth ahead of a macroscopic crack [3-5]. Keywords: crack; damage; effect; fatigue; growth; model; parameter; stress
• Crack initiation behavior of notched specimens on heat resistant steel under service type loading at high temperature by Cui, Lu; Wang, Peng (2016) - [8] Scholz, A., Berger, C, Deformation and life assessment of high temperature materials under creep fatigue loading, Mat.-wiss. Citation: Cui, L., Wang, P., Crack initiation behavior of notched specimens on heat resistant steel under service type loading at high temperature, Frattura ed Integrità Strutturale, 38 (2016) 26-35. Keywords: crack; creep; deformation; fatigue; fig; lifetime; loading; material; service; specimens; strain; stress; type
• Prediction of the critical stress to crack initiation associated to the investigation of fatigue small crack by Marhabi, D.; Benseddiq, N.; Mesmacque, G.; Azari, Z.; Nianga, J.M. (2016) - Rb RbR R ( ) sin, ,      (5a) b For Eq Eq Rb R a For Eq Rb R 2*2* 20, ( ), 2*2* 2, ( ) 2                             (9) Keywords: crack; energy; fatigue; rb rb; stress
• Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads by Yu, Xiaobo; Li, Ling; Proust, Gwenaelle (2016) - Only a few studies [1-8] focus on non-proportional mixed mode loads. It means that for both the mild steel [3] and AA7075-T651 (this study), a long and stable shear mode FCG can be produced by applying non-proportional mixed mode load. Keywords: cases; crack; fatigue; fcg; growth; loads; mode; shear
• Combined simulation of fatigue crack nucleation and propagation based on a damage indicator by Springer, M.; Nelhiebel, M.; Pettermann, H. E. (2016) - This way, fatigue crack propagation is represented by an evolving spatial zone of material failure. Applying this procedure in a repetitive way, an evolving spatial zone of material failure is simulated, representing fatigue crack propagation. Keywords: crack; cycles; damage; doi; failure; fatigue; material; nucleation; plane; propagation
• Equi-biaxial loading effect on austenitic stainless steel fatigue life by Gourdin, C.; Bradaï, S.; Courtin, S.; Le Roux, J.C.; Gardin, C. (2016) - Biaxial fatigue tests are carried out on two austenitic stainless steels for different values of the maximum deflection, and with a load ratio equal to -1. Biaxial fatigue tests are carried out on two austenitic stainless steels: 316L THY and 304L CLI for different values of the maximum value of deflection, and with a load ratio equal to -1. Keywords: biaxial; calibration; crack; deflection; fatigue; specimen; strain; test
• Averaged strain energy density-based synthesis of crack initiation life in notched steel bars under torsional fatigue by Berto, Filippo; Campagnolo, Alberto; Meneghetti, Giovanni; Tanaka, Keisuke (2016) - In circumferentially notched bars subjected to torsion fatigue loadings, factory-roof type fracture surfaces are obtained under low stress amplitudes and the sliding contact of the fracture surfaces causes the retardation of crack propagation [8–12]. However, the effects of sliding contact and/or friction between fracture surfaces during the propagation phase are evident, because the experimental results in terms of total fatigue life (see the smaller symbols: the black ones are related to pure torsion fatigue loading, while the gray ones are for torsion fatigue loading with superimposed static tension) are characterized by a high scatter, due to the difference between the fatigue lives of specimens tested with and without static tensile stress. Keywords: berto; control; crack; fatigue; initiation; life; notch; steel; stress
• Ductile fracture modelling and J-Q fracture mechanics: a constraint based fracture assessment approach by Larrosa, N.O.; Ainsworth, R.A. (2016) - It has been demonstrated that true fracture strain for ductile materials is strongly dependent on the level of stress triaxiality [15-17]. Crack tip constraint; Ductile fracture modelling; J-Q fracture mechanics. Keywords: constraint; crack; ductile; fracture; mechanics; pipe; specimen; stress; tip
• Numerical modelling in non linear fracture mechanics by Tvergaard, Viggo (2013) - Alterna- tively, the prediction of crack growth may be directly based on the fracture mechanism operating on the micro- scale, either by incorporating the failure mechanism in the constitutive equations for the material, or by repre- senting the failure mechanism through a cohesive zone model of the fracture process zone. The present paper will give a survey of a number of investigations where the prediction of crack growth has been based on models of the actual fracture mechanism. Keywords: crack; damage; failure; growth; material; model; tvergaard
• The effect of varying loading directions and loading levels on crack growth at 2D- and 3D-mixed-mode-loadings by Eberlein, A.; Richard, H.A. (2016) - [1] classify these in single over-/underloads, over-/underload sequences, block loading and service loading. The experimental investigations in this contribution study the fatigue crack growth under variable loading amplitude by interspersing block loading into a constant baseline-level loading. Keywords: base; block; crack; fig; growth; iii; loading; mode
• Process of cracking in reinforced concrete beams (simulation and experiment) by Shardakov, I. N.; Shestakov, A. P.; Glot, I.O.; Bykov, A.A. (2018) - Microsoft Word - numero_38_art_44 I. N. Shardakov et alii, Frattura ed Integrità Strutturale, 38 (2016) 339-350; DOI: 10.3221/IGF-ESIS.38.44 339 Process of cracking in reinforced concrete beams (simulation and experiment) I. N. Shardakov, A. P. Shestakov, I.O. Glot Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Korolev str., 1, Perm, 614013, Russia. Citation: Shardakov, I. N., Bykov, A.A., Shestakov, A. P., Glot, I.O., Process of cracking in reinforced concrete beams (simulation and experiment), Frattura ed Integrità Strutturale, 38 (2016) 339-350. Keywords: beam; bending; changes; concrete; crack; doi; eigenfrequencies; fig; loading; methods; shardakov; structures; vibration
• Multiaxial fatigue of in-service aluminium longerons for helicopter rotor-blades by Shanyavskiy, A.; Toushentsov, A. (2018) - [2] Shanyavskiy, A.A., Quantitative fractographic analyses of fatigue crack growth in longerons of in-service helicopter rotor-blades. [4] Shanyavskiy, A.A., Orlov, E.F., Koronov, M.Z., Fractographic analyses of fatigue crack growth in D16T alloy subjected to biaxial cyclic loads at various R-ratios. Keywords: blade; crack; equivalent; fatigue; flight; fracture; growth; longeron; service; stress
• Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves by Klon, J.; Veselý, V. (2016) - Therefore, the existence of the FPZ begins to be taken into account recently in the context of models describing quasi-brittle fracture, which is also the aim of this study. J. Klon et alii, Frattura ed Integrità Strutturale, 39 (2017) 17-28; DOI: 10.3221/IGF-ESIS.39.03 21 Figure 3: Plots of work of fracture due to quasi-brittle fracture Wf(a) and brittle effective crack length propagation Wf,b(a) (top left), their subtraction resulting in plot of cumulative energy dissipated in FPZ Wf,fpz(a) (top right), and plot of FPZ envelope (bottom). Keywords: concrete; crack; curve; energy; fig; fpz; fracture; length; process; size; specimen
• Effect of cracking and randomness of inputs on corrosion initiation of reinforced concrete bridge decks exposed to chlorides by Konecny, P.; Lehner, P. (2016) - The time to onset of corrosion of steel reinforcement of concrete bridge deck exposed to chloride is evaluated. 37 [18] Konečný, P., Lehner, P., Durability assessment of concrete bridge deck considering waterproof membrane and epoxy-coated reinforcement. Keywords: bridge; chloride; concrete; corrosion; crack; deck; doi; effect; model; probabilistic; probability; reinforcement; steel; waterproof
• A study of the stored energy in titanium under deformation and failure using infrared data by Fedorova, A.Yu.; Bannikov, M.V.; Plekhov, O.A. (2013) - 0 1 2 3 4 5 6 -0.5 0 0.5 1 1.5 2 2.5 3 x 109 time, sec W p, Q , W p-Q , J /m 3 Plastic work, heat dissipation energy and stored energy, J/m3 Accumulated dissipation energy Accumulated plastic work Stored energy 1 2 3 Figure 7: Time dependence of plastic work, heat dissipation energy and stored energy at the point near the crack tip (1, 2, 3 – time points for β-distribution in Fig. 5. 0 20 40 60 80 100 120 -1 0 1 2 3 4 5 6 7 time, sec W p (t ), Q (t ), W p (t )- Q (t ), W Plastic work, heat dissipation energy and stored energy, W Heat dissipation energy Plastic work Stored energy Figure 5: Time dependence of plastic work, heat dissipation energy and stored energy calculated for the smooth specimen. Keywords: crack; data; deformation; dissipation; energy; failure; heat; plastic; time; work
• Numerical study and pilot evaluation of experimental data measured on specimen loaded by bending and wedge splitting forces by Seitl, S.; Diego Liedo, R. (2016) - Numerical simulation; Stress intensity factor; T-stress; Concrete; Finite element method; Wedge splitting test; Three–point bending test. [5] Cifuentes, H., Karihaloo, D.L. Determination of size-independent specific fracture energy of normal and high- strength self-compacting concrete from wedge splitting tests, Construction and Building Materials, 48 (2013) 548– 553. Keywords: crack; doi; fig; fracture; iii; seitl; splitting; stress; test; values; wedge
• Fatigue crack behaviour: comparing three-point bend test and wedge splitting test data on vibrated concrete using Paris' law by Seitl, S.; Thienpont, T.; De Corte, W. De Corte (2016) - Fatigue crack behaviour; Three-point bending test; Wedge splitting test; Self-compacting concrete; Paris-Erdogan law. The Paris-Erdogan law is applicable to a wide range of materials and describes their crack propagation behaviour in a relatively correct way over a wide range of stress ratios. Keywords: 3pbt; concrete; crack; data; fatigue; law; paris; ratios; stress; wst
• Modified compact tension specimen for experiments on cement based materials: comparison of calibration curves from 2D and 3D numerical solutions by Seitl, S.; Viszlay, V. (2016) - Figure 1: Modified compact tension test: a) schema of the test and b) a photo from the test. CONCLUSIONS he finite element analysis of two effects on modified compact tension test for specimens like concrete is introduced by means of a constraint-based two parameter fracture mechanic approach. Keywords: concrete; crack; doi; fracture; gpa; model; modulus; stress; test; values
• Analysis of accuracy of Williams series approximation of stress field in cracked body – influence of area of interest around crack-tip on multi-parameter regression performance by Sobek, J.; Frantík, P.; Veselý, V. (2016) - [17] Ayatollahi, M.R., Nejati, M., An over-deterministic method for calculation of coefficients of crack tip asymptotic field from finite element analysis, Fatigue & Fracture of Engineering Materials & Structures, 34 (2010) 159–176. [20] Sobek, J., Pail, T., Veselý, V., Evaluation of crack tip Stress field using combination of advanced implementation of over-deterministic method and FE analysis, Key Engineering Materials, 627 (2015) 273–276. Keywords: crack; field; fracture; nodal; ring; selection; stress; terms; tip
• Probabilistic prediction of fatigue damage based on linear fracture mechanics by Krejsa, M.; Koubova, L.; Flodr, J.; Protivinsky, J.; Nguyen, Q. T. (2016) - Three sizes are important for the characteristics of the propagation of fatigue cracks - the initial size, detectable size and acceptable size. The algorithm of the probabilistic calculation was applied in the FCProbCalc code (“Fatigue Crack Probabilistic Calculation”), using which is possible to carry out the probabilistic modelling of propagation of fatigue cracks in a user friendly environment very effectively. Keywords: crack; crack size; doi; failure; fatigue; fatigue crack; krejsa; probability; propagation; reliability; size; time;  ;  ;  
• A consistent use of the Gurson-Tvergaard-Needleman damage model for the R-curve calculation by Cricrì, Gabriele (2013) - Nucleation parameters tuning From the afore cited experimental test data, the following experimental stress vs. crack length curve results (Fig. 9). The best nucleation parameter values are: N = 0.09 SN = 0.09 fN = 0.2 0.00 20.00 40.00 60.00 80.00 100.00 150.00 200.00 250.00 300.00 S a - a0 Figure 9: Experimental stress vs. crack length curve. Keywords: cell; crack; curve; distribution; law; material; model; parameters; strain; stress; void; volume
• Investigation of stress intensity factor for internal cracks in FG cylinders under static and dynamic loading by Shariati, Mahmoud; Mahdizadeh Rokhi, Masoud; Rayegan, Hassan (2016) - i r ir i r u u qMI u u q r r r r u u q u uC u B u u u r r , , , * 1, , , , , , , , 1 aux ir (3.8) and (3.9) we have l l l r V e V e l S Su u w u u u w u r r r z r r r r z r r u S dV r dV F S u w z z r l ns ¨ 2 2 1, 2,3,..., (3-12) l l l z V e V e S Su w u u w wr w S dV r dV F l ns r z r z r r z z ¨ 2 1, 2,3, , (3-13) Keywords: crack; cylinder; doi; intensity; r r; r z; sif; stress
• Numerical study of eddy current by Finite Element Method for cracks detection in structures by Harzallah, S.; Chabaat, M.; Chabane, K. (2016) - Microsoft Word - numero_39_art_26 S. Harzallah et alii, Frattura ed Integrità Strutturale, 39 (2017) 282-290; DOI: 10.3221/IGF-ESIS.39.26 282 Numerical study of eddy current by Finite Element Method for cracks detection in structures S. Harzallah, M. Chabaat, K. Chabane University Built Environmental Research Lab., Civil Engineering Faculty, University of Sciences and Technology HouariBoumediene, B.P 32 El Alia Citation: Harzallah, S., Chabaat, M., Chabane, K., Numerical study of eddy current by Finite element method for cracks detection in structures, Frattura ed Integrità Strutturale, 39 (2017) 282-290. Keywords: crack; current; eddy; figure; harzallah; impedance
• Using acoustic emissions to enhance fracture toughness calculations for CCNBD marble specimens by Kaklis, K.; Mavrigiannakis, S.; Saltas, V.; Vallianatos, F.; Agioutantis, Z. (2017) - [7] Wang, Q.Z., Jia, X.M., Kou, S.Q., Zhang, Z.X., Lindqvist, P.-A., More accurate stress intensity factor derived by finite element analysis for the ISRM suggested rock fracture toughness specimen – CCNBD. I P K Y π R B (5a) where       * * 1 0 I Ι* 0 Y Ν a a a (5b)          * 1 0 II ΙI* 0 P K Ν π R B a a a or     * II II P K Y π R B (6a) where       * * 1 0 II IΙ* 0 Y Ν a a a (6b) where * IY and * IIY are the dimensionless stress intensity factors for CCNBD specimen. Keywords: ccnbd; chevron; crack; fig; fracture; fracture toughness; loading; mode; rock; specimen; toughness
• Crack initiation life in notched Ti-6Al-4V titanium bars under uniaxial and multiaxial fatigue: synthesis based on the averaged strain energy density approach by Meneghetti, Giovanni; Campagnolo, Alberto; Berto, Filippo; Tanaka, Keisuke (2017) - Figure 6: (a) Crack initiation (open markers) and fatigue life to failure (filled markers) of Ti-6Al-4V notched specimens expressed in terms of averaged SED. Titanium alloy; Fatigue notch effect; Potential drop method; Crack initiation; Averaged SED. Keywords: crack; doi; fatigue; fig; initiation; life; notch; potential; specimens; volume
• Effect of different environmental conditions on surface crack growth in aluminum alloys by Shlyannikov, V.; Yarullin, R.; Ishtyryakov, I. (2017) - Microsoft Word - numero_40_art_5 V. Shlyannikov et alii, Frattura ed Integrità Strutturale, 41 (2017) 31-39; DOI: 10.3221/IGF-ESIS.41.05 31 Focused on Multiaxial Fatigue Effect of different environmental conditions on surface crack growth in aluminum alloys V. Shlyannikov, R. Yarullin, I. Ishtyryakov Kazan Scientific Center of the Russian Academy of Sciences, Russia shlyannikov@mail.ru, yarullin_r@mail.ru, ivan_200999@mail.ru ABSTRACT. Fatigue surface crack growth is studied through experiments and computations for aluminum alloys D16T and B95AT (analogue of 2024 and 7075 aluminum). Keywords: conditions; crack; growth; plastic; rate; sif; specimens; surface; temperature; ° c
• Fatigue crack propagation in turbine disks of EI698 superalloy by Shanyavskiy, A.A. (2013) - Unified description of fatigue crack growth in metals was applied to stress equivalent e value estimation based on fatigue striations measurement in fracture surfaces. There were reproduced 50 blocks in disks fatigue tests. Keywords: crack; disks; engine; fatigue; fracture; growth; material; service; spacing; stress; striation; turbine
• Evaluation of new multiaxial damage parameters on low carbon steel by Cruces, A. S.; Lopez-Crespo, P.; Moreno, B.; Lopez-Moreno, A.; Suman, S. (2017) - [21] Mokhtarishirazabad M, Lopez-Crespo P, Moreno B, Lopez-Moreno A, Zanganeh M. Optical and analytical investigation of overloads in biaxial fatigue cracks. A Critical Plane approach to multiaxial fatigue damage including out-of-phase loading. Keywords: crack; damage; data; fatemi; fatigue; life; lopez; model; parameter; plane; shear; socie; stress
• Influence of crack micro-roughness on the plasticity-induced fatigue propagation in high strength steel by Toribio, J.; Matos, J.C.; González, B. (2017) - The stress intensity factor (SIF) range used in the numerical procedure was ΔK=25MPam1/2 (associated with the Paris regime of fatigue crack propagation). The crack deflection provokes a retardation effect in fatigue crack growth in global mode I, this effect being more pronounced for elevated deflection angle, as shown in Fig. Keywords: crack; doi; fatigue; toribio
• On the applicability of Miner’s rule for multiaxial fatigue life calculations under non-proportional load histories by Meggiolaro, Marco Antonio; Pinho de Castro, Jaime Tupiassú; Ferreira, Samuel Elias; Wu, Hao (2017) - According to them, this hypothesis would be conservative, but it would produce fatigue damage predictions close to those measured experimentally. Partial loss of available life is a simple way to quantify fatigue damage, but it is not the only one. Keywords: accumulation; crack; damage; effects; fatigue; histories; load; miner; plane; rule; strain; stress
• A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures by Ferreira, Samuel Elias; de Castro, Jaime Tupiassú Pinho; Meggiolaro, Marco Antonio (2017) - Fatigue crack growth models; Strip-yield mechanics; Crack closure; Damage accumulation ahead of the crack tip. This critical damage model (CDM) assumes that fatigue cracks grow by sequentially breaking small volume elements (VE) adjacent to the crack tip after they reach the critical damage the material can sustain. Keywords: cdm; crack; damage; data; elements; fatigue; fcg; model; plastic; strain; strip; sym; tip; yield
• Crack tip field in circumferentially-cracked round bar (CCRB) in tension affected by loss of axial symmetry by Toribio, J.; González, B.; Matos, J.C. (2017) - INTRODUCTION ylindrical samples with annular cracks exhibit numerous advantages when compared to the standard specimens recommended by the ASTM E399 Standard Diverse SIF solutions were published in the matter of a circumferentially-cracked round bar (CCRB) subjected to tensile loading, for both symmetric [4-6] and non-symmetric cracks Keywords: bar; crack; doi; eccentricity; sif
• Crack tip strain evolution and crack closure during overload of a growing fatigue crack by Wang, De-Qiang; Zhu, Ming-Liang; Xuan, Fu-Zhen (2017) - It was observed that the evolution of crack tip strain follows the crack opening behaviour behind the crack tip, indicating a smaller influence of overload on micro-mechanical behaviour of fatigue crack growth. In-situ SEM; Overload; Fatigue crack growth; Digital image correlation. Keywords: closure; crack; cycles; fatigue; growth; overload; size; strain; tip
• Effect of numerical parameters on plastic CTOD by Antunes, F.V.; Simoes, R.; Branco, R.; Prates, P. (2017) - Additionally, it was shown by various authors that there is a relationship between the striation spacing (related to the amplitude of crack tip blunting over a full fatigue cycle) and the crack growth rate [4]. The CTODp was predicted numerically at the first node behind crack tip, at a distance of 8 m from it. Keywords: crack; crack tip; ctod; effect; fatigue; load; node; plastic; stress; tip
• Experimental evaluation of CTOD in constant amplitude fatigue crack growth from crack tip displacement fields by Vasco-Olmo, J.M.; Diaz, F.A.; Antunes, F.V.; James, M.N. (2017) - In the current work an experimental study of the crack tip opening displacement (CTOD) is performed to evaluate the ability of this parameter to characterise fatigue crack growth. This work is intended to contribute to a better understanding of the different mechanisms driving fatigue crack growth and the address the outstanding controversy associated with plasticity-induced fatigue crack closure. Keywords: crack; crack tip; ctod; fatigue; growth; loading; plastic; tip
• Experimental methodology for the quantification of crack tip plastic zone and shape from the analysis of displacement fields by Vasco-Olmo, J.M.; Diaz, F.A.; James, M.N.; Christopher, C.J.; Patterson, E.A. (2017) - Crack tip stress fields are then defined as:                                                                          0 0 2 3 2 1 2 2 3 22 2 3 2 2 2 2 2 3 2 2 3 2 1 2 3 2 1 22 T sinsincos sincossin coscossin r K cossin sinsin sinsin cos r K III xy y x       DOI: 10.3221/IGF-ESIS.41.23 168 WILLIAMS’ CRACK TIP STRESS EXPANSION n the Williams’ series expansion, crack tip stress fields [10] are expressed as a function of a number of terms in the series, the series coefficients and a polar coordinate system with its origin at the crack tip:  Keywords: crack; plastic; stress; tip; zone;  ;  
• Fracture toughness of rough and frictional cracks emanating from a re-entrant corner by Carpinteri, Andrea; Spagnoli, Andrea; Terzano, Michele; Vantadori, Sabrina (2017) - [6] Ballarini, R., Plesha, M.E., The effects of crack surface friction and roughness on crack tip stress fields, Int. We have introduced a transformation matrix T to express crack displacements at the collocation points in terms of those at the integration points, so that the constitutive law in (13) can be enforced. Keywords: crack; friction; mode; roughness; stress
• Impact of specific fracture energy investigated in front of the crack tip of three-point bending specimen by Klon, J.; Sobek, J.; Malíkova, L.; Seitl, S. (2017) - Microsoft Word - numero_41_art_25.docx J. Klon et alii, Frattura ed Integrità Strutturale, 41 (2017) 183-190; DOI: 10.3221/IGF-ESIS.41.25 183 Focused on Crack Tip Fields Impact of specific fracture energy investigated in front of the crack tip of three-point bending specimen J. Klon, J. Sobek, L. Malíková Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic klon.j@fce.vutbr.cz, http://orcid.org/0000-0002-9551-2185 sobek.j@fce.vutbr.cz, http://orcid.org/0000-0003-4215-1029 malikova.l@fce.vutbr.cz, http://orcid.org/0000-0001-5868-5717 S. Seitl Academy of Sciences of the Czech Republic, v. v. i., Institute of Physics of Materials, Brno, Czech Republic and Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Brno, Czech Republic seitl@ipm.cz, http://orcid.org/0000-0002-4953-4324 ABSTRACT. Specific fracture energy; Finite element method; Work of fracture; Three-point bending test; Loading curve. Keywords: crack; energy; fracture; fracture energy; length; specimen; value
• Influence of forging conditions on the fatigue mechanisms of low alloy steels: a 3D study by Lorenzino, Pablo; Buffiere, Jean-Yves; Verdu, Catherine (2017) - Fatigue cracks were initiated from an artificial defect (100 μm wide x 50 μm deep) introduced in the forging skin by laser machining. The 3D propagation behavior of fatigue cracks growing from shallow artificial defect (i.e. growing mainly within the forged skin of the materials) has been obtained through in situ X-ray synchrotron tomography. Keywords: crack; fatigue; forging; materials; samples; shape; size; surface
• Measurement and analysis of fatigue crack deformation at the micro-scale by Nowell, D.; Dragnevski, K.I.; O’Connor, S.J. (2017) - There is an increasing realisation that simple elastic crack models may have limited applicability, particularly when there is significant plastic deformation ahead of the crack and a corresponding plastic wake. [6] Christopher, C.J., James, M.N., Patterson, E.A., Tee, K.F., Towards a new model of crack tip stress fields, Int. Keywords: crack; fatigue; fig; force; model; nowell; plastic; stress
• Mid-thickness studies of the stress intensity factor in the bulk of bainitic steel by Lopez-Crespo, P.; Vazquez-Peralta, J.; Simpson, C.; Buslaps, T.; Withers, P. J. (2017) - INTRODUCTION he experimental characterisation of crack tip fields is normally done using surface techniques such as photo- elasticity [3] Diaz, F.A., Yates, J.R., Patterson, E.A., Some improvements in the analysis of fatigue cracks using thermoelasticity. Keywords: crack; crespo; data; fatigue; fig; lopez; number; sif; stress; terms; tip
• Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites by Simonova, H.; Vyhlidal, M.; Kucharczykova, B.; Bayer, P.; Kersner, Z.; Malikova, L.; Klusak, J. (2017) - The aim of this paper is quantification of basic mechanical fracture parameters of selected fine-grained cement-based composites – static modulus of elasticity, fracture toughness and fracture energy and investigation of effect of ITZ between cement matrix (MTX) and aggregate (AGG) on stress distribution in cement based composite with crack terminating at the ITZ–MTX interface. Comparison of results and their discussion In the following, the main results obtained for both composites with different ITZ thickness values and elasticity moduli of MTX and ITZ are compared and discussed. Keywords: aggregate; cement; composites; crack; doi; emtx; fracture; itz; stress; values
• On DIC measurements of DeltaKeff to verify if it is the FCG driving force by Ortiz González, Julián Andrés; Pinho de Castro, Jaime Tupiassú; Gomez Gonzáles, Giancarlo Luis; Meggiolaro, Marco Antonio; de França Freire, José Luiz (2017) - The significance of fatigue crack closure. [5] Vasudevan, A.K.; Sadananda, K.; Louat, N. Reconsideration of fatigue crack closure. Keywords: closure; conditions; crack; fatigue; fcg; kop; opening; specimens; strain; tests; keff
• On short cracks that depart from elastoplastic notch tips by Machado, Verônica Miquelin; Pinho de Castro, Jaime Tupiassú; Meggiolaro, Marco Antonio (2017) - al., J-integral applications for short fatigue cracks at notches, Int J Fract, 16 (1980) 15-30. Although surface finish should not affect the growth of fatigue cracks, the measured value could be due to other factors as well, like e.g. tensile residual stresses near the piece surface. Keywords: behavior; conditions; crack; eac; fatigue; notch; size; stress; threshold; tip
• On the connection between mode II and mode III effective thresholds in metals by Vojtek, Tomas; Zak, Stanislav; Pokluda, Jaroslav (2017) - In the case of mode III cracks, however, the analysis is much more difficult due to the complicated mechanisms of local mode II crack advances or factory roof formation. Such criteria cannot be reliably applied to mode II and mode III crack growth since there is no local mode III growth mechanism adequately efficient with respect to that of the mode II Keywords: crack; doi; fatigue; growth; iii; loading; mode; mode ii
• Stress Intensity Factor calculation from displacement fields by Beretta, S.; Patriarca, L.; Rabbolini, S. (2017) - [MPa√m] (3-terms) Kopen/Ktheo (3-terms) 1.70 18.65 7.46 0.4 8.01 0.43 1.83 20.25 7.49 0.37 8.50 0.42 1.95 21.83 7.86 0.36 8.30 0.38 2.17 25.09 9.78 0.39 9.53 0.38 2.58 33.77 13.85 0.41 14.18 0.42 Table 1: SIF measurements by DIC displacement field measurements during crack advance. Microsoft Word - numero_41_art_36.docx S. Beretta et alii, Frattura ed Integrità Strutturale, 41 (2017) 269-276; DOI: 10.3221/IGF-ESIS.41.36 269 Focused on Crack Tip Fields Stress Intensity Factor calculation from displacement fields S. Beretta, L. Patriarca, S. Rabbolini Politecnico di Milano, Department of Mechanical Engineering, via La Masa 1, 20156, Milano, Italy stefano.beretta@polimi.it, luca.patriarca@polimi.it, silvio.rabbolini@polimi.it ABSTRACT. Keywords: crack; dic; displacement; field; measurements; regression; sif; terms; tip
• Study of strain localizations in a polycrystalline medium in presence of a quasi-static crack by Patriarca, L.; Luccarelli, P.G.; Foletti, S. (2017) - Figure 5: Residual strain field at crack tip measured by Digital Image Correlation. [3] Potirniche, G.P., Daniewicz, S.R., Analysis of crack tip plasticity for microstructurally small cracks using crystal plasticity theory, Eng. Keywords: crack; crystal; field; fig; grains; model; plasticity; specimen; strain; tip
• The effect of creep damage formulation on crack tip fields, creep stress intensity factor and crack growth assessments by Shlyannikov, V.; Tumanov, A. (2017) - The variation of creep stress and the crack-tip governing parameter in the form of creep In-integral with time and the evolution of creep damage were analyzed by using the FE-model. Citation: Shlyannikov, V., Tumanov, A., The effect of creep damage formulation on crack tip fields, creep stress intensity factor and crack growth assessments, Frattura ed Integrità Strutturale, 41 (2017) 285-292. Keywords: crack; creep; damage; fem; function; stress; time; tip
• The effect of residual stress on the nonsingular T-stresses by Chernyatin, A.S.; Matvienko, Yu.G.; Razumovsky, I.A. (2017) - A A.S. Chernyatin et alii, Frattura ed Integrità Strutturale, 41 (2017) 293-298; DOI: 10.3221/IGF-ESIS.41.39 294 FATIGUE CRACK PROPAGATION UNDER CYCLIC LOADING AND RESIDUAL STRESS Crack propagation low he method is based on the modified Forman expression which includes the nonsingular T-stress       max 1 mT c C qdl K KdN K (1) where  max INTRODUCTION n analysis of propagation of surface cracks is considered in a number of publications [1-5], where the results of the experimental and numerical analysis of a flat semi-elliptical crack growth under cyclic loading are presented. Keywords: configuration; crack; effect; fatigue; loading; sif; stress; stresses; surface
• The heat energy dissipated in a control volume to correlate the crack propagation rate in stainless steel specimens by Meneghetti, G.; Ricotta, M. (2017) - Originally conceived and applied as a point-related quantity, recently Q has been averaged at the tip of propagating fatigue cracks (the Q* parameter) in order to correlate crack growth data gathered from fracture mechanics tests. A total dissipated energy theory of fatigue crack growth in ductile solids. Keywords: crack; energy; fatigue; fig; heat; meneghetti; specimens; temperature; volume
• The influence of crack tip shielding on fatigue crack propagation by Cernescu, Anghel (2017) - Mech., 2(1970) 37-45; [4] Elber, W., The significance of fatigue crack closure, Damage Tolerance in Aircraft Structures ASTM STP 486 (1971) 230-242; [5] Ritchie, R.O., Mechanisms of fatigue crack propagation in metals, ceramics and composites: role of crack tip shielding, Materials Science and Engineering, A103 (1988) 15-28. Microsoft Word - numero_41_art_41.docx A. Cernescu, Frattura ed Integrità Strutturale, 41 (2017) 307-313; DOI: 10.3221/IGF-ESIS.41.41 307 Focused on Crack Tip Fields The influence of crack tip shielding on fatigue crack propagation Anghel Cernescu Politehnica University of Timisoara, Romania anghelcernescu@gmail.com, anghelcernescu@yahoo.com, http://orcid.org/0000-0001-9513-9643 ABSTRACT. Keywords: crack; fatigue; growth; overloading; plastic; propagation; shielding; tip
• Variable mode-mixity during fatigue cycles – crack tip parameters determined from displacement fields measured by digital image correlation by Vormwald, Michael; Hos, Yigiter; Freire, José L.F.; Gonzáles, Giancarlo L.G.; Díaz, Jorge G. (2017) - In the experimental investigation, the region of fatigue crack growth was observed by applying the digital image correlation technique. Mixed-mode; Fatigue crack growth; Digital image correlation; Crack kinking. Keywords: crack; cycle; doi; equivalent; fatigue; growth; loading; mode; specimen; δki
• Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements by Seitl, S.; Malíkova, L.; Sobek, J.; Frantík, P.; Lopez-Crespo, P. (2017) - S. Seitl et alii, Frattura ed Integrità Strutturale, 41 (2017) 323-331; DOI: 10.3221/IGF-ESIS.41.43 324 INTRODUCTION haracterization of crack tip stresses has been an area of active research for many decades; see short state-of-art in [1, 2] presenting an over-deterministic least squares technique to evaluate the mixed-mode multi-parameter stress field by photo- elasticity underlining the fact that the use of a multi-parametric representation is not just for academic curiosity but a necessity in some cases of engineering interest. Crack tip fields; Optical measurements; DIC; Williams power series; Higher-order terms; Stress field reconstruction; Multi-parameter approximation. Keywords: coefficients; crack; field; lopez; specimen; stress; tip; values; williams
• Application of Leak-Before-Break concept in 316LN austenitic steel pipes welded using 316L by Giannini de Cunto, Gabriel; Paes de Andrade, Arnaldo Homobono; Monteiro, Waldemar Alfredo (2017) - For the mechanical properties found in tensile tests and using the PICEP software, were determined the leak rate curves versus crack sizes, to determine the size of a detectable leakage crack, and the critical crack sizes, considering failure by plastic collapse. For a given set of input conditions, including operation conditions, applied loads, crack G. G. Cunto et alii, Frattura ed Integrità Strutturale, 41 (2017) 332-338; DOI: 10.3221/IGF-ESIS.41.44 335 morphology and material properties (obtained by hot tensile test), PICEP return as output the size of a critical crack and a curve of leakage flow rate versus crack size. Keywords: analysis; crack; leakage; material; pipe; size; tensile; weld; zones
• Dynamic debonding in layered structures: a coupled ALE-cohesive approach by Funari, Marco Francesco; Greco, Fabrizio; Lonetti, Paolo (2017) - Citation: Funari, M. F., Greco, F., Lonetti, P., Dynamic debonding in layered structures: a coupled ALE-cohesive approach, Frattura ed Integrità Strutturale, 41 (2017) 524-535. [13] Bruno, D., Greco, F., Lonetti, P., A fracture-ALE formulation to predict dynamic debonding in FRP strengthened concrete beams. Keywords: adhesive; crack; debonding; doi; frp; interface; mesh; model
• Fatigue crack growth in 2017A-T4 alloy subjected to proportional bending with torsion by Rozumek, D.; Faszynka, S. (2017) - Fatigue crack growth; Load ratio; Notch; Bending with torsion. Descriptions of fatigue crack growth under bending with torsion of elements with rectangular cross sections are rarely discussed in the literature. Keywords: bending; crack; fatigue; fig; growth; ratio; torsion
• Crack growth of explosive welding zirconium-steel bimetal subjected to cyclic bending by Rozumek, D.; Marciniak, Z. (2017) - Fatigue crack growth on the specimen surface was observed with the portable optical microscope with magnification of 20 times. Fatigue crack growth initiated in steel and propagated toward zirconium in both cases. Keywords: bending; crack; detonation; fatigue; layer; materials; steel; zirconium
• Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack by Olzak, Miroslaw; Piechna, Janusz; Pyrzanowski, Pawel (2017) - [7] Bogdański, S., Olzak, M.. Stupnicki, J., Influence of liquid interaction on propagation of rail contact fatigue cracks, Proc. of the 2nd Mini Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Budapest, (1996) 134- 143. INTRODUCTION he research presented in the paper is part of more comprehensive investigations aimed at understanding the propagation mechanisms of rolling contact fatigue cracks in railway rails. Keywords: contact; crack; crack faces; crack mouth; cylinder; faces; liquid; model; pressure; value; wheel
• Comparison of fracture toughness values of normal and high strength concrete determined by three point bend and modified disk-shaped compact tension specimens by Seitl, Stanislav; Ríos, José D.; Cifuentes, Hector (2017) - Results of NSC stress intensity factor, KI, for each type of test and relative crack length, α, are shown in Fig. Concrete; Stress intensity factor; T-stress; Compact tension test; Fracture behavior; Fracture mechanics; Constraint. Keywords: concrete; crack; doi; fracture; nsc; seitl; specimen; strength; stress; test; values
• Crack onset assessment near the sharp material inclusion tip by means of modified maximum tangential stress criterion by Krepl, Ondrej; Klusák, Jan (2017) - In [5, 6] the effect of first non-singular stress term on stress distribution in case of sharp V-notch is studied. [7] Ayatollahi, M.R., Mirsayar, M.M., Nejati, M., Evaluation of first non-singular stress term in bi-material notches, Computational Materials Science, 50 (2010) 752-760. Keywords: crack; fracture; inclusion; interface; material; matrix; singular; stress; terms
• Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model by Huffman, P. J.; Ferreira, J.; Correia, J.A.F.O.; De Jesus, A.M.P.; Lesiuk, G.; Berto, F.; Fernandez-Canteli, A.; Glinka, G. (2017) - Fatigue crack growth (FCG) rates have traditionally been formulated from fracture mechanics, whereas fatigue crack initiation has been empirically described using stress-life or strain-life methods. Using the assumption that the stresses or strains near the crack tip are related to fatigue crack growth in the same way that global stresses and strains are related to stress-life and strain-life, an association can be made between damage parameters, such as the SWT damage parameter [16] or the damage parameter introduced by Huffman Keywords: correia; crack; data; energy; fatigue; fatigue crack; growth; huffman; life; model; propagation; steel; strain; stress
• Probabilistic fatigue S-N curves derivation for notched components by Raposo, P.; Correia, J.A.F.O.; De Jesus, A.M.P.; Calçada, R.A.B. (2017) - Estimation of the elementary material block size, ρ*, using fatigue crack propagation data from fatigue crack propagation tests as for example using CT specimens, following the procedure by Noroozi et al. The value of the elementary material block size, ρ*=12×10-4m, was estimated in the reference [9], using fatigue crack propagation data from CT specimens. Keywords: bridge; crack; data; eiffel; fatigue; field; material; model; propagation; stress; swt
• Over-deterministic method: The influence of rounding numbers on the accuracy of the values of Williams’ expansion terms by Ruzicka, Vladimir; Malikova, Lucie; Seitl, Stanislav (2017) - For counting with decimal numbers, it is necessary to use a data structure with a floating point; it gives maximally 15 decimal numbers plus an exponent in 64 bit data architecture or only 6 decimal numbers in 32 bit data architecture. One of the methods how to increase the count of decimal numbers is to convert the original number to a string of characters and then to carry out calculating with strings in specially programmed procedures. Keywords: crack; fracture; numbers; terms; tip;  ;  
• Statistical analysis of fatigue crack propagation data of materials from ancient portuguese metallic bridges by Correia, J.A.F.O.; De Jesus, A.M.P.; Calcada, R.; Pedrosa, B.; Rebelo, C.; da Silva, Luis Simoes; ISISE, Department of Civil Engineering,, G. (2017) - In this perspective, the knowledge about design fatigue crack growth curves for materials from ancient Portuguese steel bridges is extremely appropriate [1]. In this sense, design fatigue crack growth curves are extremely important to establish and maintain the safety levels of the structural details and consequently of the structures. Keywords: analysis; bridges; correia; crack; curve; data; fatigue; fcg; growth; materials; mean
• Generalised fracture mechanics approach to the interfacial failure analysis of a bonded steel-concrete joint by De Corte, Wouter; Helincks, Peter; Boel, Veerle; Klusak, Jan; Seitl, Stanislav; De Schutter, Geert (2017) - [9] Si Larbi, A., Ferrier, E., Jurkiewiez, B., Hamelin, P., Static behaviour of steel concrete beam connected by bonding. In recent years, adhesive bonding has become an accepted technique for strengthening reinforced concrete structures with steel plates Keywords: adhesive; concrete; crack; epoxy; fracture; initiation; material; mechanics; model; notch; steel; stress
• Pilot evaluation of a fracture process zone in a modified compact tension specimen by X-ray tomography by Klon, Jiri; Seitl, Stanislav; Simonova, Hana; Kersner, Zbynek; Kumpova, Ivana; Vavrik, Daniel (2017) - Microsoft Word - numero_42_art_17.docx J. Klon et alii, Frattura ed Integrità Strutturale, 42 (2017) 161-169; DOI: 10.3221/IGF-ESIS.42.17 161 Focused on Mechanical Fatigue of Metals Pilot evaluation of a fracture process zone in a modified compact tension specimen by X-ray tomography Jiří Klon, Stanislav Seitl, Hana Šimonová, Zbyněk Keršner Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 The main idea is to estimate the size of the fracture process zone under various types of load by using X-ray tomography. Keywords: crack; doi; fracture; material; mct; ray; size; specimen; test; zone
• The failure criterion based on hydrogen distribution ahead of the fatigue crack tip by Matvienko, Yu. G. (2013) - G. Matvienko, Frattura ed Integrità Strutturale, 24 (2013) 119-126; DOI: 10.3221/IGF-ESIS.24.13 119 Special Issue: Russian Fracture Mechanics School The failure criterion based on hydrogen distribution ahead of the fatigue crack tip Yu. Hydrogen distribution ahead of the crack tip; Fatigue crack growth; SIMS; Local failure criterion; High strength steel. Keywords: concentration; crack; crack tip; distribution; factor; fatigue; fatigue crack; fracture; hydrogen; stress
• Strain capacity assessment of API X65 steel using damage mechanics by Testa, Gabriel; Bonora, Nicola; Gentile, Domenico; Ruggiero, Andrew; Iannitti, Gianluca; Carlucci, Antonio; Madi, Yazid (2017) - The procedure for the identification of damage model parameters is presented. Once determined, damage model parameters allow building the limit strain diagram (LSD) to predict strain capacity as a function of stress triaxiality. Keywords: bonora; crack; damage; design; ductile; element; failure; fracture; material; model; parameters; plastic; strain; stress; testa; triaxiality
• Frontiers of fracture and fatigue: Some recent applications of the local strain energy density by Berto, F.; Razavi, S.M.J.; Torgersen, J. (2017) - [81] Lazzarin, P., Berto, F., Zappalorto, M., Mean values of the Strain Energy Density from coarse meshes: theoretical bases of a method suitable for rapid calculations of notch stress intensity factors and fatigue strength of welded joints, Int. The mean value of the strain energy density (SED) in a circular sector of radius R0 located at the fatigue crack initiation sites has been used to summarise fatigue strength data from steel welded joints of complex geometry (Fig. 4). Keywords: berto; crack; data; density; energy; eng; fatigue; fig; fract; fracture; int; lazzarin; loading; materials; mech; mode; notch; sed; specimens; strain; stress; volume
• Fatigue crack growth of composite patch repaired Al-alloy plates under variable amplitude loading by Seriari, Fatima Zohra; Benachour, Mustapha; Benguediab, Mohamed (2017) - Figure 12: Influence of band overloading parameter “q” on crack growth rates of crack patch repair at ORL=2.4. In this paper, fatigue crack growth of edge crack in 2024 T351 aluminum alloy plate repaired with bonded composite patch under constant and variable amplitude loading (VAL) was predicted. Keywords: alloy; amplitude; crack; crack growth; doi; effect; factor; fatigue; growth; length; life; loading; overload; patch; plate; ratio; repair; stress
• Crack Propagation by Finite Element Method by H. Ricardo, Luiz Carlos (2017) - [79] Gozalez-Herrera, A., Zapatero, J., Influence of minimum element size to determine crack closure stress by finite element method, Eng. In fact, inelastic deformation, such as plasticity in metals and crazing in polymers, leads to relaxation of crack tip stresses caused by the yielding phenomenon at the crack tip. Keywords: analysis; closure; crack; crack closure; crack growth; crack propagation; crack tip; doi; element; fatigue; fatigue crack; finite; fracture; growth; intensity; loading; model; opening; plastic; propagation; ricardo; stress; tip; zone
• Experimental characterization of interlaminar fracture toughness of composite laminates assembled with three different carbon fiber lamina by Gentile, Domenico (2017) - Summary of crack resistance data. Figure 10: L2 Summary of crack resistance data. Keywords: crack; data; dcb; fig; fracture; load; material; mode; resistance; value
• Analysis of crack growth problems using the object-oriented program bemcracker2D by Gomes, Gilberto; Miranda, Antonio C O (2018) - G. Gomes et alii, Frattura ed Integrità Strutturale, 45 (2018) 67-85; DOI: 10.3221/IGF-ESIS.45.06 73 Figure 4: (a) BEMLAB2D GUI lay-out; (b) Dialog for crack growth analysis. RESULTS he following results of crack propagation fatigue analysis under simple loading, obtained with the BC2D program, are compared with those obtained in Miranda [8, 9]:  Crack path mesh and KI and KII values;  Graphics of the normalized crack propagation path: f(a/w) x a/w;  Fatigue life diagrams. Keywords: analysis; bemcracker2d; boundary; crack; fatigue; fem; fig; gomes; growth; hole; path; program; results; stress
• On notch and crack size effects in fatigue, Paris’ law and implications for Wöhler curves by Ciavarella, Michele; Papangelo, A. (2018) - Paris’ law The second important power law in fatigue is Paris’ law, giving the advancement of fatigue crack per cycle, va, as a function of the amplitude of stress intensity factor ΔK (see Fig.2) In the former case, in the presence of a crack it is useful to design for fatigue crack propagation (like in the “damage tolerance” design approach), because the static limit is very high and the threshold condition is perhaps too strict, and there is margin to gain from a more elaborate design. Keywords: case; crack; fatigue; law; limit; log; material; notch; paris; size; wöhler
• Characterisation of crack tip fields under non-uniform fatigue loading by Nowell, D.; Kartal, M.E.; de Matos, P.F.P. (2013) - INTRODUCTION he study of crack tip stress, strain, and displacement fields has a long history. Microsoft Word - numero 25 art 1 D. Nowell et alii, Frattura ed Integrità Strutturale, 25 (2013) 1-6; DOI: 10.3221/IGF-ESIS.25.01 1 Special Issue: Characterization of Crack Tip Stress Field Characterisation of crack tip fields under non-uniform fatigue loading D. Nowell, M.E. Kartal University of Oxford, Department of Engineering Science, Parks Road, Oxford, OX1 3PJ, UK. Keywords: crack; displacement; fatigue; loading; overload; stress; tip
• Crack propagation mechanism and life prediction for very-highcycle fatigue of a structural steel in different environmental medias by Qian, Guian; Zhou, Chengen; Hong, Youshi (2013) - For fatigue crack initiation at surface, by considering the surface crack factor and half cycling process [7, 19], surface crack initiation cycle Ns is  [19] Tanaka, T., Mura, T., A dislocation model for fatigue crack initiation, J. Appl. Keywords: air; crack; cycle; fatigue; initiation; life; stress; subsurface; surface
• Bending fatigue strength design method for machine components with complex geometries by Deng, Gang; Nakanishi, Tsutomu (2018) - As the first stage of this study, three-point bending specimens with notches of different shapes are used to obtain bending fatigue limit stresses, which are expressed as the maximum stress at the critical point on the notch surface, and an approach to estimating the tension fatigue strength of a smooth specimen is presented, which will be the basic material property used in general bending fatigue design. Figure 7: Bending fatigue limit stresses of the specimens with different notch radii. Keywords: bending; crack; design; fatigue; fatigue strength; point; stress
• The Effects of Shear on Mode II Delamination: A Critical Review by Valvo, Paolo Sebastiano (2018) - This assessment is not pursued within this paper, as focus here is on shear forces and their effects on mode II delamination. The above considerations can be extended from the ENF test to similar mode II delamination tests – e.g. the end-loaded split (ELS) test, the four-point end-notched flexure (4ENF) test, etc. Keywords: beam; crack; deformation; delamination; doi; energy; enf; forces; fracture; h h; mode; rate; release; shear; test; theory
• Mechanical behavior of wood subjected to mode II fracture, using an energetic criterion: Application on THUJA of Morocco by Saoud, Amal; Elamri, Abdelhamid; Kimakh, Khadija; Ziani, Mohsine; Elmatar, Moussa (2018) - 5. Figure 5: (a) Photo of mounted test specimen, (b) kinematic diagram of the test specimen mounted in the gripping device: (1) machine jaws; (2) ball joint connection; (3) gripping area; (4) grooves; (5) pivot pin; (6) loading direction; (7) test specimen; (8) mechanical notch. Test material The material used is Moroccan Thuja Tectracanalis Articulata from the Middle Atlas plateau (Khemissat region). Keywords: crack; doi; fracture; load; material; mode; specimen; test; toughness; wood
• Combining experimental and numerical analysis to estimate stress fields along the surface crack front by Chernyatin, A.S.; Matvienko, Yu.G.; Razumovsky, I.A. (2013) - [3] Razumovsky, I.A., Chernyatin, A.S. Experimental numerical method to estimate loading conditions for structures with surface cracks, Journal of Machinery and Reliability, 3 (2009) 247-254. The following sizes are also used in numerical simulation: the length of semi-elliptical crack 2a =20 mm and the depth b =(2/3)a = 6.67 mm, the diameter and depth of the probe hole d Keywords: crack; singular; stress; surface; terms
• Effect of cold expansion on improving of fatigue initiation life in Aluminium alloy by El Habiri, Mohamed; Benachour, Mustapha; Benachour, Nadjia (2018) - In initiation phase, fatigue life is linked strongly to metallurgical, geometrical, loading parameters and stress state without external loading (presence of residual stress). Effect of stress ratio on fatigue crack initiation from hole without residual stress was investigated by Fujczak [18]. Keywords: alloy; crack; doi; effect; element; expansion; fatigue; hole; initiation; life; plate; stress; stresses
• Effect of Additive Elements Bi/Ni/Ge on Crack Initiation and Propagation for Low-Ag Solders by Hiyoshi, Noritake; Yamashita, Mitsuo; Hokazono, Hiroaki (2018) - Crack propagation cycle was calculated as subtract the crack initiation cycle (Ni) from the total number of cycles (N). =0.3%  =0.4% Figure 7: Crack propagation curve of Sn-low-Ag-Cu solders at 313 K. Fig, 8 shows the number of crack propagation cycles which crack length reached to 5mm for comparing the crack propagation rate. Keywords: crack; cycle; fatigue; initiation; propagation; range; rate; snagcu; solders
• Eddy current modelling using multi-layer perceptron neural networks for detecting surface cracks by Harzallah, Salaheddine; Rebhi, R.; Chabaat, M.; Rabehi, A. (2018) - CONCLUSION neural network approach for solving inverse problem in eddy current testing is presented in this paper. Finite element simulation of the probe displacement in eddy current testing, International Journal of Applied Electromagnetics and Mechanics, 45, pp. Keywords: crack; current; eddy; impedance; network; output
• Determination of fracture mechanics parameters on a base of local displacement measurements by Matvienko, Yu. G.; Pisarev, V.S.; Eleonsky, S. I. (2013) - At the same time the crack compliance method is capable of SIF deriving by local crack length increasing under constant load conditions Then initial crack length is increased by small increment Δan so that new total crack length becomes equal to an=an-1+Δan and the second exposure is performed. Keywords: crack; fig; length; notch; stress
• A 3D analysis of crack-front shape of asymmetric repaired aluminum panels with composite patches by Djebli, Abdelkader; Besseghier, El Hadj; Bendouba, Mostefa; Baltach, Abdelghani; Aid, Abdelkrim (2019) - Consequently, skew degree it is a significant effect on stress intensity factor (SIF) distribution along the crack front in thick panels more than in thin panels. Figures 9.a and 9.b shows the distribution of stress intensity factor along the crack front. Keywords: composite; crack; doi; fatigue; intensity; patch; plate; repair; stress; thickness
• Subsurface metals fatigue cracking without and with crack tip by Shanyavskiy, Andrey (2013) - The idea about subsurface fatigue crack propagation in vacuum contradicted with test results of steels having different contents of hydrogen [7]. Below will be discussed process of subsurface fatigue crack propagation in steels in gigacycle or Ultra-High-Cycle-Fatigue (UHCF) regime based on the introduced above criteria. Keywords: area; crack; cracking; fatigue; formation; fracture; growth; metals; process; subsurface; vacuum
• Effect of corrosion and fatigue on the remaining life of structures and its implication to additive manufacturing by Berto, Filippo; Razavi, Javad; Jones, Rhys; Peng, D. (2018) - Steel bridges; Corrosion; Fatigue crack growth; Remaining life. To meet this challenge, this paper will discuss the issues associated with fatigue crack growth in a corroded steel beam. Keywords: analysis; bridge; corrosion; crack; engineering; fatigue; fracture; growth; life; peng; steel; stress
• Analysis of cylindrical delamination cracks in multilayered functionally graded non-linear elastic circular shafts under combined loads by Rizov, Victor (2018) - i ib b b A A T G u dA u dA r r R r  i ib b b A A T u dA u dA r r R r                         (41) Keywords: crack; energy; fig; r r; rate; release; shaft; strain
• Optimization of the geometrical parameters of bonded composite wrap for repairing cracked pipelines by Nesreddine, sidi Mohamed Medjdoub; Bouadjra, Belabbes Bachir; Abdelkader, Miloudi (2018) - In this study the finite element method is used to analyze the performances of bonded composite wrap repair of cracked steel pipelines. The strength of the repair is governed by the thickness of composite wrap and the tensile stress at each layer of the wrap, where effective stress transfer initiates once plastic flow occurs in the repaired steel pipe Keywords: angle; composite; crack; doi; factor; intensity; length; pipeline; repair; stress; thickness; wrap
• Near tip strain evolution under cyclic loading by Tong, J.; Lu, Y.-W.; Lin, B.; Tai, Y. H.; Yates, J.R. (2013) - The concept of ratchetting strain as a crack driving force in controlling crack growth has previously been explored at Portsmouth using numerical approaches for nickel-based superalloys. INTRODUCTION he concept of ratchetting strain as a crack driving force in controlling crack growth has been investigated utilising a variety of constitutive models, including elastic-plastic, visco-plastic and crystal-plastic formulations, for nickel- based superalloys [1-3]. Keywords: crack; dic; growth; loading; strain; tip
• In situ 3D characterization of fatigue cracks displacement fields by Lachambre, Joel; Buffiere, Jean-Yves; Réthoré, Julien; Weck, Arnaud (2013) - The three dimensional growth of fatigue cracks in samples of nodular graphite cast iron is characterized using laboratory X-ray computed tomography. INTRODUCTION n their early stage of propagation, fatigue cracks have a strong three dimensional character. Keywords: crack; dvc; fatigue; stress
• Effect of crack propagation on crack tip fields by Antunes, F.V.; Chegini, A.G.; Correia, L.M.; Ramalho, A.L. (2013) - The size of crack tip plastic deformation zone has been widely studied for static loads, being usually represented in the form: 2( )p ys K r    (3) where K is the stress intensity factor and ys is material’s yield stress. E1 E2 E8 C0 http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.25.09&auth=true F. V. Antunes et alii, Frattura ed Integrità Strutturale, 25 (2013) 54-60; DOI: 10.3221/IGF-ESIS.25.09 58 Another relevant aspect is the size of crack tip plastic zone. Keywords: crack; deformation; mesh; plane; plastic; strain; stress; tip
• Multi-parameter crack tip stress state description for estimation of fracture process zone extent in silicate composite WST specimens by Veselý, Václav; Sobek, Jakub; Šestáková, Lucie; Frantík, Petr; Seitl, Stanislav (2013) - [17] Berto, F., Lazzarin, P., Christopher, C.J., James, M.N., Characterization of crack tip stress fields, Forni di Sopra (UD), Italy, March 7–9, (2011) 88–95. This paper is particularly focused on investigation of differences in crack tip stress state caused by changes in the test geometry (the specimen’s shape and boundary conditions) resulting in differences in the shape and size of the FPZ. Keywords: crack; fracture; platens; psp; stress; tip
• Is notch sensitivity a stress analysis problem? by de Castro, Jaime Tupiassú Pinho; Meggiolaro, Marco Antonio (2013) - First note that short fatigue cracks must behave differently from long cracks, since their FCG threshold must be smaller than the long crack threshold Kth(R) The FCG threshold of short fatigue cracks under pulsating loads Kth(a, R  0) can be modeled using El Haddad-Topper-Smith (ETS) characteristic size a0 Keywords: crack; fatigue; notch; sensitivity; stress
• Effect of the angles of the cracks of corroded plate in bonded composite repair by Salem, Mokadem; Mohamed, Berrahou; Belaïd, Mechab; Belabbes, Bachir Bouadjra (2018) - Under average load, damaged areas grow in size and the concentration of points in damaged areas increases. Effect of crack inclination on the variation of the ratio of the damaged area of the adhesive The effect of the inclination of the crack is shown in Figs. Keywords: adhesive; area; composite; crack; damage; doi; inclination; patch; ratio; zone
• Analysis of the crack-crack interaction effect initiated in aeronautical structures and repaired by composite patch by Ibrahim, Nour Chafak; Boualem, Serier; Belaïd, Mechab (2018) - Figure 3: Variation of stress intensity factor in crack heads as a function of crack size and mechanical loading intensity: (a) unrepaired, (b) repaired. The latter is analyzed in terms of stress intensity factor, which depends on the stress applied, the size of the cracks, and their interdistance. Keywords: crack; doi; factor; fig; intensity; intensity factor; patch; repair; stress; stress intensity
• Gradient enriched linear-elastic crack tip stresses to estimate the static strength of cracked engineering ceramics by Askes, Harm; Susmel, Luca (2013) -   (13) Eq. (9), which is the starting point of the reasoning summarised above, represents a link between the AM [10] and gradient elasticity as formalised by Aifantis and co-workers [3-5], so that, if the terms of order L4 and higher are ignored, the the l vs. L relationship can explicitly be written as: 2 21 L 8   L 2 2  (14) GRADIENT ENRICHED TIP STRESSES TO ESTIMATE STATIC STRENGTH OF CRACKED CERAMICS n order to check the accuracy of gradient enriched tip stresses in estimating the static strength of cracked engineering ceramics under Mode I static loading a number of experimental results were selected from the technical literature, the mechanical properties of the investigated materials being summarised in Tab 1. 0.05 0.5 0.01 0.1 1 10 100  t h / U T S F2·a/L SiC Si3N4 Al2O3 Sialon Inherent Strength LEFM L=2√2 l GM Figure 2: Accuracy of gradient enriched tip stresses in estimating the transition from the short- to the long-crack regime under Mode I static loading, the mechanical properties of the considered engineering ceramics being summarised in Tab 1. Keywords: crack; gradient; material; strength; stress; stresses
• On a kinked crack model to describe the influence of material microstructure on fatigue crack growth by Spagnoli, Andrea; Carpinteri, Andrea; Vantadori, Sabrina (2013) - Threshold condition and rate of fatigue crack growth in both short and long crack regime appear to be significantly affected by the degree of crack deflection. Well-known experimental results concerning two different situations (fatigue threshold and fatigue crack growth in the Paris regime) are briefly analysed. Keywords: crack; fatigue
• The impacts of type and proportion of five different asphalt modifiers on the low temperature fracture toughness and fracture energy of modified HMA by Fallah Tafti, Mehdi; Hoseini Aqda, Seyyed Abuzar; Motamedi, Hamed (2018) - The results of their experiments indicated that for both examined percentage of air voids (i.e. 3% and 7%), modified asphalt mixtures demonstrated a higher fracture toughness in comparison with the unmodified mixtures. This figure indicates a strong and direct relationship between energy absorbance capability of modified asphalt mixtures and their fracture toughness when they are subjected to mode I loading at -15°C temperature. Keywords: asphalt; bitumen; crack; energy; fracture; fracture energy; fracture toughness; loading; mixtures; mode; modifiers; results; specimens; temperature; toughness
• Numerical Simulation of a Steel Weld Joint and Fracture Mechanics Study of a Compact Tension Specimen for Zones of Weld Joint by AHMED, BENSARI; El Bahri, Ould Chikh; Benattou, Bouchouicha; Malika, Tirenifi (2018) - Bouchard [7] gives recent results on residual welding stresses. INTRODUCTION elding processes lead to changes in microstructure, residual stresses, and distortions that play an essential role in the mechanical strength of assemblies. Keywords: crack; doi; figure; fracture; heat; material; mechanical; numerical; stress; stresses; temperature; welding; zone
• Pearlitic ductile cast iron: damaging micromechanisms at crack tip by Iacoviello, F.; Di Cocco, V.; Rossi, A.; Cavallini, M. (2013) - Ductile cast irons (DCIs); Fatigue crack propagation; Graphite nodules; Damaging micromechanisms. Microstructure and stress ratio influence on fatigue crack propagation [8]. Keywords: crack; fatigue; graphite; nodules; pearlitic; propagation; stress; tip
• Formulating the in-plane frictional resistances and collapse mechanisms for multi-storey masonry block walls by Argiento, Luca Umberto; Maione, Alessandra; Casapulla, Claudia (2018) - Citation: Argiento, L.U, Maione, A., Casapulla, C., Formulating the in-plane frictional resistances and collapse mechanisms for multi-storey masonry block walls, Frattura ed Integrità Strutturale, 46 (2018) 226-239. Figure 2: Macro-block model of a multi-storey wall with identification of the masonry panels involved in a rocking-sliding mechanism. Keywords: analysis; block; crack; doi; load; masonry; mechanism; model; storey; wall
• Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor by Díaz, Francisco A.; Patterson, Eann A.; Yates, John R. (2013) - Microsoft Word - numero 25 art 16 F.A. Díaz et alii, Frattura ed Integrità Strutturale, 25 (2013) 109-116; DOI: 10.3221/IGF-ESIS.25.16 109 Special Issue: Characterization of Crack Tip Stress Field Application of thermoelastic stress analysis for the experimental evaluation of the effective stress intensity factor Francisco A. Díaz Universidad de Jaén, Departamento de Ingeniería Mecánica y Minera, Campus las Lagunillas, Edificio A3, 23071, Jaén, Spain Eann A. Patterson University of Liverpool, School of Engineering, Harrison Hughes Building, The Quadrangle, Liverpool L69 3GH, UK John R. Yates University of Manchester, School of Mechanical, Aerospace and Civil Engineering, George Begg Building, Manchester, M60 1QD, UK ABSTRACT. [2] Díaz, F.A., Yates, J.R., Patterson, E.A., Some improvements in the analysis of fatigue cracks using thermoelasticity, Int. Keywords: crack; fatigue; figure; load; strain; stress; technique; tip; tsa
• Numerical simulation of a heat generation in a layered material during ultrasonic wave propagation by Kostina, Anastasiia; Plekhov, Oleg; Aizikovich, Sergey (2018) - This result can be interpreted as the equivalence of the damping model and visco-elastic model under the considered conditions. (b) Temperature rise at edge crack tip (solid line – results presented in [5], dashed line – results of the developed model). Keywords: crack; damping; dissipation; frequency; heat; loading; material; model; rise; specimen; temperature; tip
• Fatigue crack propagation in welded joints X70 by Deliou, Adel; Bouchouicha, Benattou (2018) - The fatigue crack growth behavior of welded joints API X70 pipeline steel affected by variation of microstructure, weld materials and the loading parameter. X70; Mechanical behaviors; Fatigue crack propagation; Energy. Keywords: api; crack; doi; energy; fatigue; growth; joints; materials; metal; microstructure; pipeline; propagation; steel; weld; x70; zone
• Mechanical and fracture properties of particleboard by Marsavina, Liviu; POP, Ion Octavian; LINUL, Emanoil (2018) - This paper presents experimental results obtained for three point bending (TPB) tests, mode I and mode II fracture toughness. 4b, were used for mode II fracture toughness determination. Keywords: correlation; crack; crdf; displacement; fracture; image; marsavina; mode; thickness; toughness
• The impact of the temperature and exploitation time on the tensile properties and plain strain fracture toughness, KIc in characteristic areas of welded joint by Sedmak, Simon; Čamagić, Ivica; Sedmak, Aleksandar; Burzić, Zijah; Aranđelović, Mihajlo (2018) - Typical tensile stress-elongation curve for specimen of butt welded joint marked as WJ-1- 1, tested at room temperature is shown in Fig. 3, left [1], and for specimen marked as WJ-2-1, tested at working temperature is shown in Fig. typical tensile stress-elongation curve for specimen denoted by PM-1-1N, taken from the new PM and tested at room temperature is given in Fig. 4, left [1], and for specimen PM-2-1N, also taken from the new PM, but tested at working temperature, is shown in Fig. Keywords: crack; fracture; haz; kic; new; specimens; stress; temperature; tensile; testing; testing temperature
• Plastic zone evolution near a crack tip and its role in environmentally assisted cracking by Toribio, Jesús; Kharin, Viktor (2013) - This paper analyzes the effects of crack tip plastic strains and compressive residual stresses, created by fatigue pre-cracking, on environmentally assisted cracking of pearlitic steel subjected to localized anodic dissolution and hydrogen assisted fracture. 5b displays this correspondence according to the EAC tests and numerical data about plastic zones. Keywords: crack; cracking; eac; fatigue; plastic; stress; tip
• A numerical model based on ALE formulation to predict crack propagation in sandwich structures by Funari, Marco Francesco; Greco, Fabrizio; Lonetti, Paolo; Spadea, Saverio (2018) - Core debonding crack growth The evolution of preexisting cracks in the core is simulated by the generalization of the formulation developed in previous subsection to a two-dimensional domain. In detail, the static behavior of interfacial crack propagation at the upper interface between face-sheet and core is investigated on classical Double Cantilever Beam (DCB) and Mixed Mode Bending (MMB) loading schemes. Keywords: core; crack; debonding; fracture; frattura; funari; interface; mesh; model; propagation; sandwich; structures; strutturale; tip
• Novel weight functions and stress intensity factors for quarterelliptical cracks in lug attachments by Akbari, S.; Nabavi, S. M.; Moayeri, H. (2018) - [9] carried out two similar investigations, in which they obtained the SIFs for both through and surface cracks using 3D FEM analysis. Q is the shape parameter for elliptical crack, which is based on a series expansion of an elliptic integral of the second kind and can be approximated as [25]: 1.65 1 1.464( )Q a c   0 1a c  (14) Keywords: crack; doi; loading; lug; pin; quarter; results; sifs; stress; surface
• The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion by Matvienko, Yury; Pisarev, Vladimir; Eleonsky, Svyatoslav (2018) - G. Matvienko et alii, Frattura ed Integrità Strutturale, 47 (2019) 303-320; DOI: 10.3221/IGF-ESIS.47.23 305 dependencies between crack opening displacements and fatigue crack length constructed for crack lengths of 1, 2 and 3.7 mm for coupons with plain and cold-expanded holes. There is the single approach to experimental determination of fracture mechanics parameters for cracks in residual stress field without preliminary determination of residual stress values. Keywords: crack; crack length; experimental; fatigue; holes; length; loading; mpa; sif; specimens; stress; values
• Role of plasticity-induced crack closure in fatigue crack growth by Toribio, Jesús; Kharin, Viktor (2013) - [13] McClung, R. C., Thacker, B. H., Roy, S., Finite element visualisation of fatigue crack closure in plane stress and plane strain, Int. [16] Wu, J., Ellyin, F., A study of fatigue crack closure by elastic-plastic finite element for constant-amplitude loading, Int. Keywords: closure; crack; fatigue; fcg; growth; loading; material; picc; plastic; strain; tip
• Algorithm for automatic fatigue crack growth simulation on welded high strength steels by Baptista, Ricardo Miguel Gomes Simões; Infante, Virginia; Marques, João (2019) - [23], is useful to predict fatigue crack propagation. [23] have also used this technique to calculate fatigue crack propagation. Keywords: algorithm; crack; doi; fatigue; fig; growth; increment; mode; models; propagation; sif; specimen
• Fatigue crack growth in notched specimens: a numerical analysis: Fatigue crack growth in notched specimens by Antunes, Fernando Ventura; Branco, Ricardo; Prates, Pedro; Costa, José Domingos (2019) - Although the increase of crack closure, the crack growth increases the plastic CTOD range, which results from the effect of crack length on crack tip stresses. - the increase of crack length and, therefore, of crack tip stresses and p. - the increase of crack closure as the plastic wake is formed. Keywords: closure; crack; ctod; fatigue; growth; notch; plane; plastic; state; strain; stress
• Investigation of the effect of cracks on the vibration processes in reinforced concrete structures by Shardakov, Igor; Shestakov, Aleksey; Tsvetkov, Roman; Glot, Irina (2018) - Review of non destructive testing methods for condition monitoring of concrete structures, J. Constr. Amplitude and phase measurements of continuous diffuse fields for structural health monitoring of concrete structures, NDT&E International, 77, pp. Keywords: concrete; crack; deformation; doi; fig; impact; impulse; model; shardakov; structure; vibration
• Validation of fracture envelopes of structural adhesives for mixed-mode strength prediction of bonded joints by Campilho, Raul; Ribeiro, João; Rocha, Ricardo; Leal, Alberto; Viana, Filipe (2019) - Three adhesives were tested, in order of increasing ductility: Araldite® AV138, Araldite® 2015 and Sikaforce® 7752. Figure 1: Example of - curves of the adhesives Araldite® AV138, Araldite® 2015 and Sikaforce® 7752. Keywords: adhesive; araldite; av138; crack; dlj; doi; fracture; gic; joints; mode; shear; sikaforce; slj; specimens; tests
• Initiation and growth behavior of very-long microstructurally short fatigue cracks by Lorenzino, P.; Navarro, A. (2013) - Short crack; Microstructural barrier; Grain size; Notch; Fatigue crack initiation; Fatigue limit; Crack growth rate. The inauspicious beginnings of the characterization of fatigue crack growth rate of long cracks by the stress intensity factor range as described in the Paris law is a well-known episode in fracture mechanics lore. Keywords: crack; fatigue; grain; growth; microstructure; notch; size
• High magnification crack-tip field characterisation under biaxial conditions by Moreno, B.; Lopez-Crespo, P.; Zapatero, J. (2013) - This work presents a novel methodology for characterising fatigue cracks under biaxial conditions. Then a new method for measuring displacement and strain crack-tip fields on fatigue cracks grown following the previous procedure is shown. Keywords: crack; dic; displacement; fatigue; fig; hole; strain; technique
• Stress Intensity Factor Solutions for CTS Mixed Mode Specimen by Antunes, Fernando Ventura; Branco, Ricardo; Ferreira, José António Martins; Borrego, Luís (2019) - Furthermore, to evaluate the characteristics of mixed mode fatigue crack, it is necessary to introduce the comparative stress intensity factor Kv considering mode I and mode II simultaneously. Mixed mode fatigue crack: a literature survey, Engineering Fracture Mechanics, 55 (6), pp. 969-990. Keywords: crack; direction; fatigue; fracture; loading; mode; solution; specimen; values
• Numerical Investigation on Stress Intensity Factor and J Integral in Friction Stir Welded Joint through XFEM method by Elmeguenni, Imane imane_elmeguenni; Mazari, Mohamed (2018) - The simulation of crack propagation allowing the use of the cohesive zone method and associated by the law of evolution of the damage (initiation and propagation of crack). In order to simulate the phenomenon of crack propagation in a friction stir welded joint, it is then necessary to take into account the plasticity at the crack tip. Keywords: crack; friction; fsw; joint; material; numerical; propagation; stress; thesis; welding; zone
• Crack paths in soft thin sheets by Brighenti, Roberto; Carpinteri, Andrea; Artoni, Federico (2019) - thanks to the small deformation hypothesis, the nominal ( ijP ) and true stress ( ij ) tensor components are identical. Finite strain analysis of crack tip fields in incompressible hyperelastic solids loaded in plane stress. Keywords: crack; deformation; doi; field; fig; materials; rate; strain; stress; tip
• Study of overload effects in bainitic steel by synchrotron X-ray diffraction by Lopez-Crespo, P.; Withers, P.J.; Yates, J. R.; Steuwer, A.; Buslaps, T.; Tai, Y. H. (2013) - [2] Alizadeh, H., Hills, D.A., de-Matos, P.F.P., Nowell, D., Pavier, M.J., Paynter, R.J., Smith, D.J., Simandjuntak, S., A comparison of two and three-dimensional analyses of fatigue crack closure, International Journal of Fatigue29 (2007) 222-231. [6] Kelleher, J.F., Lopez-Crespo, P., Yusof, F., Withers, P.J., The use of diffraction to study fatigue crack tip mechanics. Keywords: crack; fatigue; kmin; overload; plane; strain; stress; tip
• Extension of the CJP model to mixed mode I and mode II by Christopher, C. J.; Laboviciute, G.; James, M. N.; Patterson, E. A. (2013) -                                               (3) FK is defined from the asymptotic limit of y as x 0  , along y 0 , i.e. towards the crack tip from the front along the crack line: r 0 1 2 F y r rK lim 2Er ln(r ))2 r( (A 3B 8E) 2              (4) RK was obtained by evaluating x in the limit as x 0  , along y 0 , i.e. towards the crack tip from behind along the crack flank: Mixed mode fatigue; CJP crack tip stress model; plastic inclusion; crack tip shielding. Keywords: crack; mode;  ;  
• Experimental Investigation on the Fracture Behaviour of Natural Stones Exposed to Monotonic and Cyclic Loading by Spagnoli, Andrea; Cendon Franco, David; D’Angelo, Antonio (2018) - Fatigue crack propagation; Marble; Quasi-brittle behaviour, Thermal cycles. It can be seen how the latter is mostly inside the region of FPZ generation, revealing that a significant level of damage (corresponding to a large FPZ) ahead of the notch tip is required for fatigue crack propagation. Keywords: crack; curve; fatigue; fracture; loading; marble; model; point; specimens; tests
• Size effect on the fracture resistance of rough and frictional cracks by Spagnoli, Andrea; Carpinteri, Andrea; Terzano, Michele (2018) - The effects of crack surface friction and roughness on crack tip stress fields, Int. Observations on the failure of quasi-brittle and brittle materials, such as concrete, ceramics, rocks or glass, revealed that crack growth does not proceed planarly, but on the contrary tortuous topologies of the crack paths are noticed. Keywords: crack; doi; effect; fracture; interface; roughness; stress; surface
• Experimental characterization at nanoscale of single crystal silicon fracture toughness by Gallo, Pasquale; Sumigawa, Takashi; Kitamura, Takayuki (2018) - Ktn δf (nm) Pf (μN) Specimen 1 6.3 68 4.9 83.74 30.84 Specimen 2 20.2 59 2.9 115.59 65.11 Table 2: Geometry of the notches, deflection at failure δf and load at failure Pf. DISCUSSION: NANOCRACKING IN SILICON s is well-known, tensile strength and fracture toughness are fundamental mechanical properties. Measurement for fracture toughness of single crystal silicon film with tensile test, Sensors Actuators, A Phys., 119(1), pp. Keywords: crack; doi; fracture; material; nanoscale; pre; silicon; specimens; stress; theory; toughness
• Influence of material inhomogeneity and non-linear mechanical behavior of the material on delamination in multilayered beams by Rizov, Victor (2018) - i ai ai y y y y z y y y z y y y z y y y y y z z y z z                             (15) where                    (49) where 0 iLu , 0 iRu , xip and xRip are obtained by (16), (19), (20), (23), (25) – (28), (31), (36), (37) and (43) at 1x a . Keywords: beam; crack; delamination; energy; material; strain; y y
• Fatigue crack growth in welded S355 specimens subjected to combined loadings by Brighenti, Roberto; Lewandowski, Janusz; Rozumek, Dariusz; Lesiuk, Grzegorz (2019) - Fatigue crack growth in welded joints is still a very attractive engineering problem, because of the occurrence of various types of crack initiators, such as geometrical and microstructural notches or residual M http://www.gruppofrattura.it/VA/48/2244.mp4 J. Lewandowski et alii, Frattura ed Integrità Strutturale, 48 (2019) 10-17; DOI: 10.3221/IGF-ESIS.48.02 11 stresses, as well as the presence of numerous non-metallic inclusions and weld defects. The test results related to fatigue crack growth under proportional bending and torsion, were obtained in the laboratory of the Department of Mechanics and Machine Design at Opole University of Technology. Keywords: bending; crack; doi; fatigue; fig; growth; material; specimens; torsion; welds
• Brittle crack propagation acceleration in a single crystal of a 3% silicon-Fe alloy by Kawbata, Tomoya; Nakamura, Noritaka; Aihara, Shuji (2018) - Though it has been reported that the upper limit of the speed of brittle crack propagation is theoretically the Rayleigh wave speed, which is approximately 2,900 m/s in steels, the actual speed of brittle crack propagation in steels is approximately 1,000 m/s and lower. To investigate the physical aspects of brittle crack propagation, experimental researches [5, 6], theoretical researches Keywords: crack; fig; fracture; grain; kawabata; propagation; speed; steel
• Evaluation of Fatigue Properties under Four-point Bending and Fatigue Crack Propagation in Austenitic Stainless Steel with a Bimodal Harmonic Structure by Kikuchi, Shoichi; Nakatsuka, Yuta; Nakai, Yoshikazu; Nakatani, Masashi; Kawabata, Mie Ota; Ameyama, Kei (2019) - Fatigue cracks, which were initiated from pores, coalesced at several instants and the final fracture occurred at 2.08×105 cycles. Four-point bending fatigue tests and K- decreasing tests were conducted in air at room temperature under a stress ratio R of 0.1 to investigate fatigue crack propagation in SUS304L. Keywords: crack; doi; fatigue; harmonic; kikuchi; series; steel; structure
• Numerical Comparison of Cruciform weld and Butt weld simulation and a Study of Fracture Mechanics on Two Types of Welds by Bouchouicha, Benattou; Tirenifi, Malika; Ould Chikh, El Bahri; Bensari, Ahmed (2019) - 4a shows temperature profiles in butt-welded plates and cruciform welded plates after the start of welding along the width of two plates (first pass). A comparison of the temperature history on the measurement locations obtained by the numerical method for cruciform welded plates and butt-welded plates, shows that their temperature history is nearly identical. Keywords: butt; butt weld; crack; cruciform; cruciform weld; doi; joint; mpa; numerical; pass; stress; temperature; weld; welding
• Damage localization of closing cracks using a signal decomposition technique by Prawin, J.; A, Rama Mohan Rao (2019) - DOI: 10.3221/IGF-ESIS.48.49 513 Focused on “Showcasing Structural Integrity Research in India” Damage localization of closing cracks using a signal decomposition technique J. Prawin, A. Rama Mohan Rao CSIR Structural Engineering Research Centre, India prawinpsg@gmail.com, http://orcid.org/0000-0002-7579-025X arm2956@yahoo.com, http://orcid.org/0000-0002-6405-3633 ABSTRACT. The presence of fatigue-breathing crack or closing cracks is usually characterised by the presence of sub and super- harmonics in the response of the structure subjected to harmonic excitation. Keywords: beam; closing; components; crack; damage; excitation; fig; harmonic; index; noise; response
• Effect of crack position and loading conditions on SIF in SiC particles reinforced Al composite by Metehri, Aicha; Kouider, Madani; Lousdad, Abdelkader (2019) - Effect of particle size and ratio of B4C reinforcement on properties and morphology of nanocrystalline Al2024-B4C composite powders, Powder Technology 246, pp. 462 –472. This is possibly attributed to the different failure mechanisms of crack growth caused by the actions of SiC particle size, shape and distribution [9]. Keywords: crack; effect; intensity; kii; matrix; mode; particle; stress
• Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading by Bressan, Stefano; Ogawa, Fumio; Itoh, Takamoto; Berto, Filippo (2018) - Microsoft Word - 2263 S. Bressan et alii, Frattura ed Integrità Strutturale, 47 (2019) 126-140; DOI: 10.3221/IGF-ESIS.47.10 126 Influence of notch sensitivity and crack initiation site on low cycle fatigue life of notched components under multiaxial non-proportional loading Stefano Bressan Graduate School of Science and Engineering, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu-shi, Shiga, 525-8577, Japan gr0300kf@ed.ritsumei.ac.jp Fumio Ogawa, Takamoto Itoh Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu- shi, Shiga, 525-8577, Japan itohtaka@fc.ritsumei.ac.jpyahoo.com, ogawa-f@fc.ritsumei.ac.jpyahoo.com Filippo Berto Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), Richard Birkelands vei 2b, 7491, Trondheim, Norway filippo.berto@ntnu.no ABSTRACT. Citation: Bressan, S., Ogawa, F., Takamoto, I., Berto, F., Influence of notch sensitivity and crack initiation site on low cycle fatigue life of notched components under multiaxial non- proportional loading, Frattura ed Integrità Strutturale, xx (2019) Keywords: crack; cycle; doi; fatigue; initiation; life; loading; non; notch; parameter; specimens; strain; stress
• Crack growth based life prediction approach under LCF-HCF interaction by Sarkar, Aritra; Okazaki, M.; Nagesha, A.; Sandhya, R. (2019) - This above behavior can be also followed from the relationship between fatigue crack growth and strain amplitude under FM expressed as da/dN=A (ΔƐin)n a (2) where da/dN=crack propagation rate, ΔƐin=inelastic strain, a=instantaneous crack length and n & A=material constant. On R ratio dependence of threshold stress intensity factor range for fatigue crack growth in type 316(N) stainless steel weld, Mater. Keywords: acr; crack; fatigue; growth; hcf; lcf; length; life; loading; ratcheting; strain
• Fatigue crack growth simulation of two non-coplanar embedded cracks using s-version finite element method by Takahashi, Akiyuki; Suzuki, Ayaka; Kikuchi, Masanori (2019) - Non-coplanar embedded cracks; Fatigue crack growth; Stress intensity factor; Alignment rule; S-version finite element method. Up till now, many experimental and numerical studies on the fatigue crack growth of surface cracks have been conducted to model the complex behavior of fatigue crack growth and establish an accurate evaluation method of the residual fatigue life [1-3]. Keywords: crack; crack growth; fatigue; growth; non; stress
• A novel algorithm for crack path identification based on infrared images by Romanin, Luca; Vinogradov, Alexei; Berto, Filippo; Ferro, Paolo (2019) - A total dissipated energy theory of fatigue crack growth in ductile solids, Int. Every 750 cycles a 1s sequence has been recorded, this is a good compromise between hard disk space and discretization of crack growth. Keywords: crack; crack tip; doi; energy; fatigue; filtering; function; gaussian; heat; noise; temperature; time; tip; wavelet
• Determination of dissipated Energy in Fatigue Crack Propagation Experiments with Lock-In Thermography by Bär, Jürgen; Urbanek, Ralf (2019) - The mean and maximum E-Amplitude values decrease with increasing crack length, which can be attributed to the decrease in the applied force. This additional bending stress reduces the sum of principal stresses with increasing crack length, which reduces the temperature changes at the crack tip, although the stress intensity in the loading direction is constant. Keywords: amplitude; crack; length; stress; temperature; values
• Tension - torsion fatigue tests on the proton exchange membrane Nafion 115 (Perfluorosulfonic acid) by DOMINGUEZ ALMARAZ, Gonzalo Mariano; TORRES DUARTE, Luis M.; TORRES PACHECO, Christian J. (2019) - Biaxial elastic–viscoplastic behavior of Nafion membranes, Polymers, 52(2), pp. Creep and stress-rupture of Nafion® membranes under controlled environment, Mech. of Mat., 42(7), pp. Keywords: crack; doi; fatigue; fig; fuel; membrane; nafion; stress; strip; tensile; tension; torsion
• Isothermal and thermomechanical fatigue interaction in fatigue crack propagation behavior of a low-carbon nitrogen-controlled 316 stainless steel by Yamazaki, Yasuhiro (2019) - On R ration dependence of threshold stress intensity factor range for fatigue crack growth in type 316(N) stainless steel, Mat. Crack growth during low-cycle fatigue of smooth axial specimens, cyclic stress-strain and plastic deformation aspects of fatigue crack growth, ASTM STP, 637, pp. Keywords: crack; creep; fatigue; growth; lcf; loading; propagation; rate; tmf
• Initial orientation of the fretting fatigue cracks in shrink-fit connection specimens by Santus, Ciro (2019) - The Erdogan and Sih criterion, or Maximum Tangential Stress (MTS), was followed by them and the modelled crack orientation resulted to grow outward the contact below the fretting surface, especially for low bulk stress values, thus not in agreement with the general trend of fretting fatigue cracks. A theoretical model for the prediction of initial growth angles and sites of fretting fatigue cracks, Tribol. Keywords: contact; crack; doi; fatigue; fretting; maximum; orientation; santus; shear; stress; type
• Crack propagation in a brittle DCB specimen assessed by means of the Williams’ power expansion by Malikova, Lucie; Razavi, Seyed Mohammad Javad; Berto, Filippo (2019) - The effect of non-singular stresses on crack tip constraint, J. Mech. Multi-parameter crack tip stress state description for evaluation of nonlinear zone width in silicate composite specimens in component splitting/bending test geometry, Fatigue Fract. Keywords: crack; criterion; fracture; parameter; specimen; stress; terms; tip
• The effect of fatigue crack rate on the heat dissipation in metals under mixed-mode loading by Vshivkov, Aleksei; Plekhov, Oleg (2019) - [9] we obtained the relation to calculate the energy of plastic deformation as a consequence, energy dissipation at fatigue crack tip:    An approximation for the energy dissipation at fatigue crack tip was proposed. Keywords: crack; dissipation; energy; fatigue; heat; loading; plastic; rate; strain; stress; tip
• A model of energy dissipation at fatigue crack tip in metals by Vshivkov, Aleksei; Plekhov, Oleg; Iziumova, Anastasiia; Venkatraman, Balasubramaniam (2019) - Monitoring of energy dissipation during fatigue crack propagation can give significant information about the kinetics of deformation processes and the current crack propagation rate [5-8]. EXPERIMENTAL SETUP wo types of experiments were carried out to analyze energy dissipation under fatigue crack propagation in metals. Keywords: amplitude; crack; dissipation; energy; factor; fatigue; intensity; loading; plastic; stress; tip
• The experimental study of heat dissipation during fatigue crack propagation under biaxial loading by Vshivkov, Aleksei; Plekhov, Oleg; Iziumova, Anastasiia; Zakharov, Aleksandr; Shlyannikov, Valery (2019) - At the first stage, the power of heat flux is proportional to the product of the crack rate by the crack length. The measurement of heat flux near the crack tip allows one to calculate the energy balance during crack propagation and to develop a new equation for its description. Keywords: biaxial; crack; dissipation; energy; fatigue; flux; heat; heat flux; loading; propagation; sensor
• Microcrack interaction with circular inclusion and interfacial zone by Profant, Tomas; Hrstka, Miroslav; Klusak, Jan (2019) - This process is modelled by introducing the density of the Burgers vector ( )ˆ ˆ Y B X and ( )ˆ ˆ X B X , which is in relation with Burgers vector ( )ˆ ˆ, X Y b b=b as follows ( ) ( ) ( ) ( )ˆ ˆ ˆ ˆ ˆ ˆd d ˆ ˆ, ,ˆ ˆd d Y X Y X b b B B X X X = X = X X (22) T. Profant et alii, Frattura ed Integrità Strutturale, 48 (2019) 503-512; DOI: 10.3221/IGF-ESIS.48.48 508 where ˆ ˆ cos sin , sin cos . Finally, the boundary conditions (8) and (9) in the inner problem formulation (7), lead to the solution of the following system of the singular integral equations following from the above mentioned transformations of (10) ( ) ( ) ( ) ( ) ( ) ( ) 1 (0 ) 1 ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆˆˆ 1 0 2ˆ ˆ ˆ ˆ ˆˆ ˆ ˆ; ; dˆˆ1yy X XYY Y YYY T X B H X B H X X m e p k é ùæ ö÷çê ú= X X + X + X X÷ç ÷çê úè ø+ -Xë û ò , (24) ( ) ( ) ( ) ( ) ( ) ( ) 1 (0 ) 1 ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆˆ̂ 1 0 2ˆ ˆ ˆ ˆ ˆˆ ˆ ˆ; ; dˆˆ1xy X XXY Y YXY T X B H X B H X X m e p k é ùæ ö÷çê ú= X + X + X X X÷ç ÷çê úè ø+ -Xë û ò (25) and integral equations ensuring the closed crack tips ( ) ( ) 1 1 ˆ ˆ 0 0 Keywords: crack; h h; h k; n h; z +; z z; ˆ ˆ
• Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks by Miranda, Antonio; Marques, Rafael; Meggiolaro, Marco Antonio; Pinho de Castro, Jaime Tupiassú (2019) - Although experimental results reveal that the frontiers of surface cracks essentially retain their elliptical shape as they gradually grow into an 1D through-crack, it is usual to assume they are immediately transformed into an 1D through-crack when their depth reaches the cracked component thickness. There are authors that claim that, for fatigue life estimation purposes, it can be assumed that surface cracks immediately transform into through-cracks as their depth a reaches the thickness t at the back surface of the cracked component Keywords: c c; c w; crack; fatigue; growth; surface; t c; transition;  
• Influence of microstructure on fatigue property of ultra high-strength steels by OKUDA, Kanji; OGAWA, Kazuhiro; ICHIKAWA, Yuji; SHIOZAKI, Tsuyoshi; YAMAGUCHI, Naoki (2019) - To elucidate the cause of delay in crack propagation speed in precipitation hardened steel, SEM observation and EBSD analysis was conducted. The arrow indicates the direction of fatigue crack propagation. Keywords: class; crack; fatigue; mpa; notch; precipitation; steel; strength
• Numerical crack growth study on porosity afflicted cast steel specimens by Schuscha, Manuel; Leitner, Martin; Stoschka, Michael; Pusterhofer, Stefan; Meneghetti, Giovanni (2019) - Mechanisms of fatigue crack propagation in metals, ceramics and composites, Mater. The importance of crack initiation based fatigue assessment by local approaches is also visible in the presented fraction of total lifetime. Keywords: cast; crack; defect; doi; factor; fatigue; fracture; growth; notch; numerical; size; specimen; stress
• Experimental characterization of fiber-reinforced cementitious mortar under tension by Bernardi, Patrizia; Cerioni, Roberto; Ferretti, Daniele; Leurini, Filippo; Michelini, Elena (2019) - DIC was applied to the first series of direct tension tests and to both the performed series of bending tests. [mm] Peak Load [kN] ft,ax [MPa] T-1-1 30.06 14.64 0.523 1.19 T-1-2 29.91 14.80 0.740 1.67 T-1-3 30.12 15.05 0.995 2.20 T-1-4 30.06 15.24 0.632 1.38 T-1-5 29.91 14.60 1.119 2.57 T-1-6 29.98 15.03 0.720 1.60 ft,ax,mean = 1.77 MPa Table 1: Direct tension tests, 1st series: cross section dimensions of the central part of the specimens, achieved peak load and corresponding axial tensile strength (ft,ax). Keywords: bending; crack; doi; mortar; series; specimens; strength; tensile; tests
• Multi-axial fatigue numerical crack propagation in cruciform specimens by Giannella, Venanzio; Perrella, Michele (2019) - Assessment of crack growth from a cold worked hole by coupled FEM-DBEM approach, Key Engineering Materials. A FEM-DBEM investigation of the influence of process parameters on crack growth in aluminium friction stir welded butt joints, Int. Keywords: crack; dbem; doi; fem; growth; load; loading; propagation; test
• Cruciform specimens used for determination of the influence of T-stress on fatigue crack growth with overloads on aluminum alloy Al 6061 T651 by Henkel, Sebastian; Wolf, Carl H.; Biermann, Horst; Burgold, Andreas; Kuna, Meinhard (2019) - Experiments with 0° oriented cracks and overloads indicate that under tensile load in crack growth direction the retardation effect after a cyclic overload is less pronounced than without load in crack direction, which is explained by the reduced plasticity at the crack tip. Cruciform specimens are also employed to understand crack growth in blade-integrated disks for gas turbines Keywords: crack; direction; doi; fig; growth; loading; specimen; stress
• Influence of secondary dendrite arm spacing (SDAS) on the fatigue properties of different conventional automotive aluminum cast alloys by Gerbe, Sascha; Krupp, Ulrich; Michels, Wilhelm (2019) - The resulting scientific findings serve as input data to adjust and to extend an existing short crack model based on the boundary element method (BEM), which is described in detail, e.g., in [12-13], and which is based on the concept that fatigue crack propagation is hindered by microstructural barriers (cf. CONCLUSIONS atigue and fatigue crack propagation experiments on two different in-series cast aluminum alloys revealed significant effects of the cooling-rate-dependent secondary dendrite arms spacing (SDAS). Keywords: alloy; aluminum; cast; cooling; crack; doi; engine; fatigue; fig; porosity; propagation; rate; sdas; threshold
• Mixed mode fracture: numerical evaluation and experimental validation using PMMA specimens by Gonçalves Pereira, Sérgio Alexandre; Tavares, Sérgio M.O.; de Castro, Paulo M.S.T. (2019) - The analysis of mixed mode crack propagation has been more accessible with the development of new numerical tools, allowing to evaluate the influence of non-mode I loadings in the crack path and in the growth rate. By varying the position of the crack in relation to the plane of application of the load (in the middle of the specimen), the measurement of the toughness in mode I (KIc) or the analysis of mixed mode crack propagation are possible, Fig. Keywords: bending; crack; fig; mode; pereira; point; propagation; specimen; stress; strutturale
• Use of the XFEM for the design of adhesively-bonded T-joints by Campilho, Raul; Moreira, Filipe (2019) - The number of approaches to predict the strength of adhesive joints has increased over the years. The aeronautical, naval, automotive and aerospace industries are good examples where adhesive joints are widely applied. Keywords: adhesive; araldite; av138; crack; criteria; damage; doi; failure; joints; sikaforce; strength; stresses; tp2; xfem
• Specimen Level and Component Level Simulations of Fatigue Crack Growth Behavior under Cyclic Bending by R, Suresh Kumar; Rao, B N; K, Velusamy; S, Jalaldeen (2019) - The reduction in the rate of crack growth beyond 6 mm is due to the influence of low KI value. This paper describes a benchmark analysis that was performed to demonstrate numerical simulation capability on fatigue crack growth (FCG) behaviour under cyclic bending. Keywords: bend; crack; data; fcg; geometry; growth; pipe; plate; specimen; stress
• Investigation on fracture processes of concrete by Bhowmik, Sonali; Dubey, Sandeep; Ray, Sonalisa (2019) - Fracture process zone size and true fracture energy of concrete using acoustic emission. Similar procedure has been adopted in order to locate the tip of effective crack in medium size concrete beam under fatigue loading. Keywords: beam; concrete; crack; dic; fracture; load; loading; peak; process; size; technique
• Durability method on corrosion fatigue performance of AH 32 steel by huang, xiaoguang; wang, zhiqiang (2019) - By aid of corrosion fatigue tests, the effects of thermal spraying Zn (zinc) and Cr (chromium) coating corrosion fatigue lives are quantitatively determined, respectively, and electrochemical measurement and fracture analysis are used to analyze the life-prolonging mechanism of these two coatings on corrosion fatigue. The effect of Cr coating on corrosion fatigue of AH 32 steel mainly reflects in extending the crack initiation life for its better corrosion resistance. Keywords: coating; corrosion; corrosion fatigue; crack; doi; effect; fatigue; journal; life; propagation; steel; stress; surface
• The effect of creep damage model formulation on crack path prediction by Shlyannikov, Valery; Tumanov, Andrey (2019) - In the case of theoretical prediction for creep crack growth rate in extensive creep conditions used the steady-state values of C*- integral and corresponding expression for creep stress intensity factor crK for C(T) specimen in the following form In the case of ductility based model, there is a tendency for creep damage to localize only at the blunted part of the notch. Keywords: cr cr; crack; creep; damage; rate; shlyannikov; stress
• The crack path in fuselage panel under mixed mode biaxial loading by Zakharov, Alexander; Shlyannikov, Valery; Tumanov, Andrey (2019) - Microsoft Word - 2326 A. Zakharovet alii, Frattura ed Integrità Strutturale, 48 (2019) 87-96; DOI: 10.3221/IGF-ESIS.48.11 87 Focussed on “Crack Paths” The crack path in fuselage panel under mixed mode biaxial loading Alexander Zakharov, Valery Shlyannikov, Andrey Tumanov Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, Russia alex.zakharov88@mail.ru, https://orcid.org/0000-0003-3568-1427 shlyannikov@mail.ru, https://orcid.org/0000-0003-2468-9300 tymanoff@rambler.ru ABSTRACT. The plastic stress intensity factor (SIF) concept is here applied to estimate the critical crack size in fuselage panel under biaxial loading. Keywords: biaxial; crack; elements; fracture; fuselage panel; loading; model; mpa; plastic; plastic solution; sif; solution; stress; tip
• Numerical simulation of a crack emanating from a micro-cavity in the orthopedic cement by technical sub modeling of total hip prosthesis by Abderahmane, Sahli; Djafar, Ait Kaci; Rachid, Zahi; Abdelmadjid, Moulgada; Smail, Benbarek (2019) - In order to compare the behavior of cracks emanating from a cavity, variation of the stress intensity factor as a function of the crack orientation for different positions in the three zones is represented: proximal, medial and distal, along orthopedic cement, the mesh on the bottom crack is well refined, a crack length 0.1 mm supposed initiated from the end of a spherical cavity diameter 0.2 mm. Comparison of KI for different crack positions in the proximal part of the cement Fig. Z. Rachid et alii, Frattura ed Integrità Strutturale, 49 (2019) 586-598; DOI: 10.3221/IGF-ESIS.49.54 592 Figure 10: Meshing to the sub-model. RESULTS AND DISCUSSION he stress intensity factor characterizes the stress field and the displacement at the tip of the crack; it has a direct influence on crack propagation in the monotonic or cyclic loading [3, 18]. Keywords: bone; cavity; cement; crack; doi; fig; hip; model; positions; prosthesis; stress
• Experimental investigation of surface roughness effect on fatigue performance of AISI 1045 carbon steel and fatigue limit prediction by Kimakh, Khadija; Chouaf, Abdelkerim; Saoud, Amal; Mallil, El Hassan; Aghzer, Samir (2019) - This article investigate the effect of surface roughness on the fatigue strength of AISI 1045 carbon steel obtained by the turning process. Specimen N6 with surface roughness Ra = 1.24 µm, b) Specimen N8 with Ra = 2.26 µm, c) Keywords: crack; cutting; doi; fatigue; lifetime; roughness; specimen; steel; surface; surface roughness
• Finite Element Analysis of Interactions of between two cracks in FGM notched Plate under Mechanical Loading by Bouchikhi, Aboubakar Seddik; Lousdad, Abdelkader; Yassine, Khalfi; Bouida, Nasser Eddine; Gouasmi, Sadek; Megueni, Abdelkader (2019) - It is found that due to the presence of multiple crack edge cracks, the stress distribution is relaxed and therefore, the stress intensity factors for all cracks decreased and when the distance between the cracks is increased, interaction is seemed to be diminished and it is can be neglected especially for shallow cracks. The Fig.9 represents the variations of the J-integral at the crack tip D of the crack CD with respect to the distance L. it can be observed that the J-integral at crack tip becomes greater with the transversal distance. Keywords: angle; crack; crack tip; doi; effect; fgm; figure; integral; interaction; method; notch; plate; stress; variation
• Numerical study of semi-elliptical cracks in the critical position of pipe elbow by Muthanna, Bassam Gamal Nasser; Bouledroua, Omar; Meriem-Benziane, Madjid; Hadj-Meliani, Mohammed; Pluvinage, Guy; Suleiman, Rami Khalid (2019) - This work is divided into four main parts: the first part focused on studying and comparing the effect of bending radius of pipe elbow on the maximum of Von-Mises stress values for each radius with the yield stress of the steel of the pipe. In the third part, the Citation: Muthanna, B. G. N., Bouledroua, O., Meriem-Benziane, M., Hadj Meliani, M., Pluvinage, G., Suleiman, R. K., Numerical study of semi-elliptical cracks in the critical position of pipe elbow, Frattura ed Integrità Strutturale, 49 (2019) 463-477. Keywords: angle; assessment; corrosion; crack; doi; elbow; failure; fracture; intensity; mode; muthanna; pipe; stress; strutturale
• Localized wrinkling of metal films on elastic and liquid substrates by Sun, Yi; Yan, Liping; Chen, Benyong; Song, Wei; Berto, Filippo (2019) - Wrinkle patterns of Fe films deposited on micro-scale silicone oil droplets, Thin Solid Films, 558, pp. Microsoft Word - 2353 Y. Sun et alii, Frattura ed Integrità Strutturale, 48 (2019) 648-665; DOI: 10.3221/IGF-ESIS.48.62 648 Localized wrinkling of metal films on elastic and liquid substrates Yi Sun Zhejiang Sci-Tech University, China Norwegian University of Science and Technology, Norway yisun1987@hotmail.com Keywords: crack; doi; evolution; fig; film; formation; metal; metal film; oil; patterns; phys; radial; stress; substrate; sun; thickness; wrinkles; wrinkling
• Stress intensity factors analyses for external semi-elliptical crack for repaired gas-pipeline by composite overwrap under pressure by Belhadri, Djamel Eddine; Belhamiani, Mohamed; Bouzitouna, Wahiba Nesrine; Oudad, Wahid (2019) - A. Saffih and S. Hariri studied elliptical cracks in a cylinder with a thickness transition. Numerical study of elliptical cracks in cylinders with a thickness transition, International Journal of Pressure Vessels and Piping. 83. Keywords: composite; crack; fig; figure; intensity; mode; pipe; repair; sif; stress; thickness; variation
• Analysis of the Fatigue Damage Behavior of AW2099-T83 Al-Li Alloy under Strain-Controlled Fatigue by Adinoyi, Muhammed Jamiu; Merah, Nesar; Albinmousa, Jafar (2019) - [44] Table 4: Comparison of fatigue constants of the present alloy with conventional Al alloys. Even with recent effort to replace major parts of the aircraft with composite, Al alloys continue to play a major role in the industry. Keywords: alloy; amplitude; behavior; crack; cycle; doi; fatigue; fig; life; plastic; strain; strength; stress; t83; tensile
• Modeling of a cracked and repaired Al 2024T3 aircraft plate: effect of the composite patch shape on the repair performance: Effect of the composite patch shape on the repair performance. by Baghdadi, Mohammed; Serier, Boualem; Salem, Mokadem; Zaoui, Bouchra; Kaddouri, Khacem (2019) - Based on this model, Ibrahim and al [27] analysed the degradation of the adhesive layer used for composite patch repair of cracked aircraft structures. Optimum patch repair shapes for cracked members, Int. Keywords: adhesive; composite; crack; doi; layer; patch patch; patch repair; patch shape; repair; shapes; shear; stresses; surface
• Determination of Stress Intensity Factors and J integral based on Digital Image Correlation by Breitbarth, Eric; Strohmann, Tobias; Besel, Michael; Reh, Stefan (2019) - The colored data points indicate values for (a) KI and (b) KII for different crack tip positions (indicated by the colored squares) while the integration paths were always kept constant. Figure 8: Comparing different integration domains pure mode I conditions based on 3d image correlation with GOM Aramis 12M. (a) Overview of integration domains surrounding the crack tip, (b) diagram of KI and number of elements of the integration domains. Keywords: crack; dic; domain; field; fig; integral; integration; line; mode; results; tip; values
• Verification of the ΔKeff hypothesis along the fatigue crack path in thin and thick Al specimens by González, Julián Andrés Ortiz; de Castro, Jaime Tupiassú Pinho; Gonzáles, Giancarlo Luis Gomez; Meggiolaro, Marco Antonio; Freire, José Luiz de França (2019) - It is interesting to point out that these experimental results support the procedures recommended by the ASTM E647 standard test method for measurement of fatigue crack growth rates under a fixed R, which assumes they are caused by ΔK, not by ΔKeff. Standard test method for measurement of fatigue crack growth rates. Keywords: conditions; crack; doi; fatigue; fcg; kmax; kop; opening; plane; specimens; strain; δkeff
• Analysis of the presence of bonding defects on the fracture behavior of a damaged plate repaired by composite patch by Kaddouri, Nadia; Kouider, Madani; Amine, Mohammed Bellali; Feaugas, Xavier (2019) - Considerable research has been done in recent years to develop the technology for bonding composite patches in aeronautical structures. 0 10 20 30 40 50 0 2 4 6 8 10 12 14 J -I nt eg ra l ( m j/m m ²) Crack length (mm) Plate unrepaired Plate repaired Figure 5: Variation of the J-Integral as a function of the length of the crack to the damaged plates and repaired by composite patch. Keywords: adhesive; composite; crack; defect; integral; patch; plate
• Comparison of the constraint parameters in elastic-plastic fracture mechanics by Matvienko, Yury (2019) - Prediction of fracture toughness dependence on constraint parameter A using the weakest link model, Eng. Constraint parameters; Elastic-plastic fracture mechanics. Keywords: constraint; crack; field; fracture; mechanics; parameter; plastic; stress; tip
• Effect of shape factor on structural reliability analysis of a surface cracked pipeline-parametric study by Guillal, Abdelkader; Abdelbaki, Noureddine; Bensghier, Mohamed el Amine; Kopei, Bogdan; Bettayeb, Mourad (2019) - The variation of crack shape factor (a/c) during propagation has an important role on calculation of the stress intensity factor (SIF), where imprecise estimation of this latter can lead us to an inaccurate prediction of failure probabilities. In this work, the effect of crack shape factor on reliability index calculation is considered. Keywords: crack; depth; doi; factor; fatigue; growth; index; pipeline; point; ratio; reliability; shape; stress; surface
• Environmental effects on the reliability of an AISI 304 structure by Boutelidja, Racim; Guedri, Abdelmoumene; Belyamna, Mohammed Amine; Merzoug, Bachir (2019) - Case studies of IGSCC failures in nuclear power plants are presented and the contribution of environmental effects on crack initiation and leakage is discussed. The enhanced code allowed for crack initiation at multiple sites around the circumference of a girth weld and simulated linking adjacent cracks to form longer cracks more likely to cause larger leaks and pipe ruptures. Keywords: analysis; code; corrosion; crack; cracking; doi; failure; fracture; initiation; leak; piping; praise; probability; reliability; stress
• Experimental characterisation of fatigue crack growth based on the CTOD measured from crack tip displacement fields using DIC by Olmo, José Manuel Vasco; Díaz, F.A. ; Antunes, F.V. ; James, M.N. (2019) - Microsoft Word - numero_50_art_56_2433 J.M. Vasco-Olmo et alii, Frattura ed Integrità Strutturale, 49 (2019) 658-666; DOI: 10.3221/IGF-ESIS.50.56 658 Focused on Crack Tip Fields Experimental characterisation of fatigue crack growth based on the CTOD measured from crack tip displacement fields using DIC J.M. Vasco-Olmo, F.A. Díaz University of Jaén, Spain jvasco@ujaen.es fdiaz@ujaen.es F.V. Antunes University of Coimbra, Portugal Fernando.ventura@dem.up.pt M.N. James University of Plymouth, UK M.James@plymouth.ac.uk ABSTRACT. The current work presents an experimental study on the use of the crack tip opening displacement (CTOD) to evaluate its ability to characterise fatigue crack growth. Keywords: crack; crack tip; ctod; displacement; fatigue; fig; growth; loading; plastic; tip
• Damage evolution in the AlMg6 alloy during high and very high cycle fatigue by Bannikov, Mikhail; Bilalov, Dmitry; Oborin, Vladimir; Naimark, Oleg (2019) - High cycle fatigue in aircraft gas turbines - an industry perspective, International Journal of Fracture 80, pp.147-163. Thus, the complete system of constitutive equations looks as follows: ( : ) 2 ( )pλ G   σ D E E ε ε p    (15) 1 2 p d F      ε σ p  (16) 2 3d F     p σ p  (17) 4 F δ δ      (18) 2 2 2 1 2 3 4 : ln( ) 2 2 2 d m p pF c p c c c p p F δ G        σ p (19) Keywords: amplitude; crack; cycle; damage; defects; doi; fatigue; loading; material;  
• Further investigation on microstructure refinement of internal crack initiation region in VHCF regime of high-strength steels by Chang, Yukun; Zheng, Liang; Pan, Xiangnan; Hong, Youshi (2019) - Mechanism of fatigue crack initiation and propagation in the very high cycle fatigue regime of high-strength steels, Scripta Materialia, 67(10), pp. 838-841. Fatigue crack growth from small to long cracks in very- high-cycle fatigue with surface and internal fish-eye failures for ferrite-perlitic low carbon steel SAE 8620, Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 468, pp. Keywords: crack; cycle; doi; fatigue; fga; fig; materials; microstructure; region
• Duality of singularities of multiscale damage localization and crack advance: length variety in Theory of Critical Distances by Naimark, Oleg (2019) - Starting from this scales 0a the singularity related to the stress intensity factor 0K is combined with the blow-up singularity (6), that provides fatigue crack kinetics up to the scale la . The structural volume idea takes as starting point for the assumption that all physical processes resulting in the formation of fatigue cracks are confined within a finite volume. Keywords: blow; crack; damage; energy; fatigue; fracture; kinetics; length; material; mechanics; naimark; singularities; stress; tcd; theory
• Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution by Meneghetti, Giovanni; Campagnolo, Alberto; Berto, Filippo (2019) - The method takes five FE nodal stresses calculated with coarse FE meshes made of four-node, linear quadrilateral finite elements: three of them are the singular, linear elastic crack tip opening, sliding and tearing peak stresses, respectively, which take into account the stress intensity factor contribution; the remaining two ones are the nodal stresses evaluated along the crack free edges at a selected distance from the crack tip and take into account the T-stress contribution. The use of peak stresses for fatigue strength assessments of welded lap joints and cover plates with toe and root failures, Eng. Keywords: approach; crack; eqn; loading; mode; nodal; peak; plane; ratio; stress
• Pipeline repair by composite patch under temperature and Pressure loading by Abdelouahed, Elamine; Benzaama, H.; Mokhtari, M.; Aour, B. (2019) - The effectiveness of composite patch repair bonded to the cracked surface is highlighted. It has long been recognized that in some cases, residual heat stress is a serious problem for the effectiveness of composite patch repair. Keywords: adhesive; composite; crack; epoxy; factor; intensity; patch; pipeline; repair; stress; variation
• Multi-parameter fracture mechanics: Crack path in a mixed-mode specimen by Malikova, Lucie; Simonova, Hana; Kucharczykova, Barbara; Miarka, Petr (2019) - Strain energy density factor applied to mixed mode crack problems, Int. Multi-parameter fracture criteria for estimation of crack propagation direction applied to a mixed- mode geometry, Engng. Keywords: crack; doi; fracture; parameter; stress; terms; tip; williams
• Investigation of Failure Mechanism of Al2O3 Specimens Subjected to Three-Point Bending Test by Eremin, Mikhail Olegovich; Smolin, Igor; Kulkov, Alexey; Mikushina, Valentina (2019) - (a) (b) Figure 3: Experimental loading diagrams as received, dashed lines illustrate the slope of a linear elastic stage of the specimen’s deformation (a), fractured specimens (b). Recently the mesoscale models of a representative volume of porous alumina ceramics were built on the basis of grain and pore distribution patterns and subjected to uniaxial loading in order to determine effective mechanical characteristics which are utilized for macroscopic simulation in this work. Keywords: alumina; ceramics; crack; doi; fig; fracture; loading; numerical; simulation; specimens; stress
• Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip by Gonzáles, Giancarlo luis Gómez; González, Julián Andrés Ortiz; Castro, Jaime Tupiassú Pinho de; Freire, José Luiz de França (2019) - Advanced analysis of crack tip plastic zone under cyclic loading, International Journal of Fatigue, 93, pp. Therefore, it is a truism to say that the behavior of the plastic zones that always accompany fatigue crack tips is of great important for the understanding of fatigue crack growth (FCG) problems. Keywords: behavior; crack; doi; fatigue; fig; loading; plastic; strain; tip; unloading; zone
• Using XFEM Techniques to Predict the Damage of aluminum 2024T3 notched under tensile load by Benzaama, Abdallah ; Mokhtari, Mohamed; Benzaama, Habib; Abdelouahed, Elamine; Tamine, Tawfik; Madani, Kouider; Slamen, Amir; Ilies, Mrabet (2019) - • These modifications of the forms of reinforcement bring an improvement on the resistance of the plates, which can go up to 11 kN. • An interdependence of effect (reinforcement shape and notch shape) has been observed, and which acts in the positive and sometimes negative direction all depends on the case that appears between the shape of the cut and the shape of the cut enhancement. • b=30mm b=38.21 b=50mm Table 2: Dimension of different reinforcement forms. Keywords: crack; damage; effect; figure; notch; numerical; reinforcement; results; shape
• The ab-initio aided strain gradient elasticity theory: a new concept for fracture nanomechanics by Profant, Tomas; Pokluda, Jaroslav (2019) - Similarly to the Barenblatt solution (1) the 3/2r variation in (6) shows a cusp-like profile of crack faces. Similarly to the Barenblatt model, the SGET removes the stress singularity at the crack tip and produces a cusp-like profile of crack faces near the crack tip in accordance with atomistic models. Keywords: crack; crack tip; doi; elasticity; fracture; gradient; model; sget; solution; strain; stress; tip
• Leak-Before-Break methodology applied to different piping materials: a performance evaluation by Silva, Israel Gleybson Ferreira da; Andrade, Arnaldo Homobono Paes de; Monteiro, Waldemar Alfredo (2019) - [12] determined the leakage rate curves versus crack size. 10.3221/IGF-ESIS.50.06 50 Figure 1: Leakage rate curves versus crack size. Keywords: analysis; case; crack; lbb; leakage; margin; materials; nuclear; pipe; safety; size
• Experimental investigation of fatigue crack initiation from notch for 2024 T351 Al-alloy by Benachour, Mustapha; Benachour, Nadjia; Benguediab, Mohamed (2019) - Microsoft Word - numero_51_art_4_2511 N. Benachour et alii, Frattura ed Integrità Strutturale, 51 (2020) 45-51; DOI: 10.3221/IGF-ESIS.51.04 45 Focussed on Structural Integrity and Safety: Experimental and Numerical Perspectives Experimental investigation of fatigue crack initiation from notches in 2024 T351 Al-alloy Nadjia Benachour, Mustapha Benachour* University of Tlemcen, Ingeniery of Mechanical Systems and Materials Laboratory, Tlemcen, Algeria Faculty of Technology, Mechanical Engineering Department nbenachour2005@yahoo.fr, bmf_12002@yahoo.fr Mohamed Benguediab University of Sidi Bel Abbes, LMPM Laboratory, Sidi Bel Abbes (Algeria), Mechanical Engineering Department benguediab_m@yahoo.fr ABSTRACT. Fatigue crack initiation; Notch; Finite element method; Stress field; Aluminum alloy. Keywords: alloy; crack; criterion; doi; fatigue; initiation; loading; notch; stress
• A Determination of fracture toughness in plain concrete specimens by R curve by Chbani, Hamza; Saadouki, Bouchra; Boudlal, Mostapha; Barakat, Mohamed (2019) - Determination of Double-K Criterion for Crack Propagation in Quasi-Brittle Materials, part I: experimental investigation of crack propagation, International Journal of Fracture, 98(2), pp. For this reason, effective crack length is determined by the following equations Keywords: concrete; crack; curve; doi; fracture; length; load; materials; notch; propagation; specimens; toughness
• Predicting the crack path in a wedge under a concentrated tensile force by means of variational principle by Matvienko, Yury; Popova, Nataliya; Morozov, Evgeny (2019) - Crack path; Variational principle; wedge; Concentrated tensile force. The above-mentioned assumption leads to the variational problem for predicting crack paths and can be given by the following equation  L 0 . Keywords: crack; force; path; principle; tensile; wedge
• Approximation of the crack-tip field in fatigue cracks in bridge steel specimens: DIC analysis of different constraint levels by Seitl, Stanislav; Miarka, Petr; Ruzicka, Vladimir; Malikova, Lucie; Cruces, Alejandro; Lopez Crespo, Pablo (2019) - A study on the accuracy of the approximation of the displacement field around of crack tip in a sample made from bridge steel (S355) is main objective of contribution. Characterisation of stress fields near crack tip has been studied for many decades; see for example a short state-of-art Keywords: crack; crespo; dic; displacement; doi; fatigue; field; lopez; stress; terms; tip; williams
• Nonlinear modeling of unreinforced masonry structures under seismic actions: validation using a building hit by the 2016 Central Italy earthquake by Ferrero, Chiara; Barbosa Lourenço, Paulo; Calderini, Chiara (2019) - [10], was integrated with the information about geometry, structural configuration, past interventions and seismic damage supplied by the Italian Network of University Laboratories in Seismic Engineering (RELUIS) and the University of Genova, in charge of post-earthquake surveys [11]. Consequently, numerical models need to be validated or calibrated based on empirical evidences in order to prove their capability to simulate realistically the structural response of masonry buildings [3]. Keywords: 24th; 26th; august; building; crack; damage; direction; figure; load; masonry; model; numerical; october; structure; values; walls
• Effect of yield stress on fatigue crack growth by Antunes, Fernando Ventura; Borges, Micael Frias; Prates, Pedro; Branco, Ricardo; Oliveira, Marta (2019) - Fatigue Crack Growth; Plastic CTOD; Yield stress; Crack closure. This article is centered on the study of the effect of yield stress on FCG, using a numerical approach. Keywords: contact; crack; ctod; deformation; fig; load; plane; plastic; stress; yield
• Characterization of stress-strain state in gas turbine engine compressor disc taking into account damage accumulation by Boychenko, Natalia V; Ishtyryakov, Ivan (2019) - Characterization of crack tip stress fields in test specimens using mode mixity parameters, International Journal of Fracture, 185, pp. Stressstrain fields under extensive creep can be written in terms of creep stress intensity factor Kcr in the following form [23]: 1 * 1 0 1 crn cr cr n C K BI L        (10) where B and ncr are creep constants, cr nI is the governing parameter of the stress–strain fields for power-law creeping materials, and С* is the С-integral under extensive creep. Keywords: compressor; compressor disc; conditions; crack; creep; damage; disc; doi; factor; fig; fracture; parameters; plastic; strain; stress; surface; temperature
• Crack growth study under thermo-mechanical loads: parametric analysis for 2024 T3 aluminum alloy by abdallah, Salmi; Elajrami, Mohamed; Slimani, Mohamed El-Amine (2019) - These combinations are responsible for the initiation and propagation of fatigue cracks in these parts, which can lead to failure. In this simple form, the presence of a growth threshold of fatigue cracks and a limit greater than ∆K (stress intensity factor range) for the fracture are not shown, although, if appropriate, expressions taking into account these limits, as well as the influence of the load ratio of the cycle R = Pmin / Pmax can be easily found in the literature. Keywords: alloy; c c; c t=50; crack; doi; fatigue; position; t=30 °; t=50 °; temperature; thickness; ° c
• Numerical simulation of crack propagation behavior of a semi-cylindrical specimen under dynamic loading by Khandouzi, Ghorban; Mollashahi, Mohsen; Moosakhani, Mojtaba (2019) - To verify the numerical modeling output, the curve of crack surface opening displacement (CSOD) in X-FEM model has been compared with the experimental curve. Figure 7: CSOD curve for SCB specimen in X-FEM model Keywords: crack; fem; fig; fracture; method; model; numerical; rock; specimen; stress
• Stress intensity factor for small embedded cracks in weldments by Livieri, Paolo; Segala, Fausto (2019) - Weight function; Stress intensity factor; Three-dimensional crack; A novel principle for the computation of stress intensity factors, ZAMM 50, pp. Keywords: burns; crack; fig; intensity; livieri; sif; stress
• Building crack monitoring based on digital image processing by Xu, Yanyan; Cai, Yanxia; Li, Dandan; Zhang, Tierui (2020) - Crack images were collected by CCD camera, and then operations such as graying, correction, denoising and segmentation were carried out to obtain clear crack images. It was found from Fig. 3 that the quality of crack images was poor under the influence of illumination and noise, which was not conducive to crack monitoring. Keywords: building; crack; doi; image; length; method; monitoring; processing; results; study; width
• J integral computation and Limit load analysis of bonded composite repair in cracked pipes under pressure by Belhamiani, Mohamed; Belhadri, Djamel Eddine; Oudad, Wahid; Mansouri, Omar; Bouzitouna, Wahiba Nessrine (2019) - In the Fig 5 some plots are shown which refer to the behaviore of J integral max (a) and the J* (b) vs crack length . In the other hand, the J* confirm this observation where J* remain independent to c/t for crack length greater than 1,8 of c/t. Keywords: analysis; composite; crack; doi; integral; length; limit; load; model; pipe; plastic; pressure; repair
• Three approaches to evaluate of the heat dissipated during fatigue crack propagation experiments by Vedernikova, Alena; Iziumova, Anastasiia; Vshivkov, Aleksey; Plekhov, Oleg (2019) - IR-thermography; Lock-in thermography; Heat flux sensor; Dissipated energy; Fatigue crack propagation. In this study, we have shown that the energy dissipation values measured by the thermography techniques are in good qualitative agreement with the results obtained by the method in which contact heat flux sensors are used. Keywords: contact; crack; dissipation; doi; energy; fatigue; flux; heat; sensor; specimen; thermography
• Finite element analysis of the thermomechanical behavior of metal matrix composites (MMC) by Bouchra, Zaoui ; Mohammed, Baghdadi; Serier, Boualem; Belhouari, Mohammed (2020) - This clearly illustrates that, under residual stress effect, the crack propagation mode in the matrix and in the fiber is different. Composites; Crack growth; FEM; Residual stresses; Stress Intensity Factor (SIF); Interface. Keywords: composite; crack; fiber; fig; iii; intensity; interface; matrix; matrix crack; matrix fiber; mode; stresses
• Numerical modeling based on moving mesh method to simulate fast crack propagation by Fabbrocino, Francesco ; Funari, Marco Francesco ; Greco, Fabrizio; Lonetti, Paolo; Luciano, Raimondo (2019) -                                                                    (5) where rV and r are the volume and the loaded area in the referential configuration, C  is the elastic moduli matrix collecting stiffness coefficients, det( J ) is the determinant of a scalar metric representing the ratio of differential areas. Xf f f X fX f X X f X X                                (3) where   is the gradient operator function. Keywords: crack; doi; fracture; growth; mechanics; mesh; numerical; propagation; tip;  
• Simulation of the delay effect after applying a simple overload on alloys of aluminum 2024T351 using the Willemborg model by Bahram, Kaddour; Chaib, Mohamed; Slimene, Abdelkader; Bouchouicha, Benattou (2019) - In the following, we will use the AFGROW calculation code and the model describing the delay of Willembourg to study the influence of the application of simple overload on different parameters such as, crack spread, crack rate and overload rate. A crack opening stress equation for fatigue crack growth, International Journal of fracture, 24(4), pp. Keywords: application; crack; cycles; delay; doi; fatigue; loading; number; overload; propagation; rate; stress
• Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables by Massabò, Roberta; Monetto, Ilaria (2019) - Higher order equivalent single layer models can be used which increase the number of the global variables and better describe the transverse stresses in fully bonded problems (a) (b) Figure 7: Critical load for crack propagation versus load point displacement in the homogeneous and isotropic cantilever beams with multiple delaminations shown in the insets (results for homogenized model in [18] and discrete layer model in [4]): (a) symmetrically positioned cracks; (b) asymmetrical positioned cracks (lengths and positions in the main text). Keywords: crack; displacement; doi; interfaces; k k; layers; load; model; shear; theory; zigzag
• Elastoplastic analysis of cracked Aluminum plates with a hybrid repair technique using the bonded composite patch and drilling hole in opening mode I by Bouzitouna, Wahiba Nessrine; Oudad, Wahid; Belhamiani, Mohamed; Belhadri, Djamel Eddine; Zouambi, Leila (2020) - It is obvious that each repair procedure has advantages and disadvantages; this paper focuses on the requirement of hybrid repair method by combining a bonded patch with drilled stop hole, that enhances the residual strength of the damaged structures. Numerous and varied crack repair techniques have been proposed for arresting or retarding crack propagation in structural components such as: i) the use of bonded composite patch repair, A Baker and al Keywords: composite; crack; doi; drilling; fig; hole; hybrid; notch; patch; repair; stress; zone
• Microstructural damage evaluation of ferritic-ausferritic spheroidal graphite cast iron by Fernandino, Diego Omar; Di Cocco, Vittorio; Tenaglia, Nicolas; Bellini, Costanzo; Iacoviello, Francesco; Boeri, Roberto Enrique (2019) - In‐situ microscopic analysis of ferritic ductile iron during tensile loading Relation between matrix heterogeneities. Study of the fracture of ferritic ductile cast iron under different loading conditions. Keywords: ausferrite; crack; damage; doi; ductile; fernandino; fig; fracture; iron; step; tensile
• The Effect of corrosion on the quality repair of the aluminum alloy A 5083 H11 by bonded composites by Kaddour, Sadek; Aour, Benaoumeur; Bennouna, Mohammed Salah; Talha, Abderrahim ; Bachir Bouiadjra, Belabbes; fari bouanani, Morad (2020) - Several parameters affect the integrity of composite patch repair. Optimisation of composite patches repairs with the design of experiments method, Mater. Keywords: adhesive; boron; carbon; case; corrosion; crack; damage; doi; epoxy; epoxy patch; load; mpa; patches; plate; repair
• Low cycle fatigue damage model and sensitivity analysis of fatigue crack initiation by finite element approach by Wang, Zhiqiang; Huang, Xiaoguang; Zhang, Dian-hao (2020) - Fatigue damage is always caused by the cumulative plastic strain. The accumulation of plastic deformation per cycle promotes the continuous evolution of fatigue damage, and the accumulated fatigue damage at the middle of the notch root firstly reach 1, indicating the fatigue crack firstly initiates from this position, as shown in Fig. Keywords: crack; cycle; damage; doi; evolution; fatigue; fatigue damage; initiation; life; notch; strain
• Initiation of hydrogen induced cracks at secondary phase particles by Laureys, Aurélie; Pinson, Margot; Claeys, Lisa; Deseranno, Tim; Depover, Tom; Verbeken, Kim (2020) - The removal of surface oxides is required, since they exhibit an inhibiting effect on hydrogen transport to the metal surface and as such possibly affect the nucleation and propagation of hydrogen induced cracks [45]. Figure 15: SEM images of initiating hydrogen induced cracks in pressure vessel steel: a) Interface decohesion at a MnS inclusion. Keywords: charging; crack; cracking; doi; fig; hydrogen; inclusions; initiation; laureys; material; phase; pressure; steel; trip
• Object-Oriented Software for Fitness-For-Service Assessment of Cracked Cylinder Based on API RP 579 by Kasivitamnuay, Jirapong; Singhatanadgid, Pairod (2020) - For convenience, these identified classes are renamed and listed (in the same order as those appearing in the problem description) as Cylinder, UniformCorrosion, Crack, Assessment, Weldment, ResidualStress, Material, GeneralInfo, Tensile, Toughness, FCG, Environment, NominalLoad, and Stress classes. Development of probabilistic mechanics analysis code for pipes with stress corrosion cracks, Journal of Power and Energy Systems, 3(1), pp. 103-113. Keywords: assessment; class; classes; component; crack; cylinder; fig; growth; information; level; material; software; standard; stress; tab
• Crack growth rate prediction based on damage accumulation functions for creep-fatigue interaction by Tumanov, Andrey; Shlyannikov, V.N.; Zakharov, A.P. (2020) - (1) with take into account that cr crr ar , and integrating leads to the equation for creep crack growth in terms of C*-integral and creep stress intensity factor crK : A multiaxial creep-damage model for creep crack growth considering cavity growth and microcrack interaction. Keywords: accumulation; crack; creep; damage; doi; fatigue; growth; rate; stress
• Comparative study of the repair of cracked plates with two different composite patches by Abdelmadjid, Moulgada; El Sallah, Zagane Mohammed ; Abderahmane, Sahli; Djafar, Ait kaci ; Rachid, Zahi (2020) - In particular, composite patch repair has shown its effectiveness in the field of aeronautics and maritime structures [15]. Load 100 MPa» a) b) c) Figure 6: Distribution of normal stresses xx: a) Plate not repaired b) Plate repaired Boron epoxy c) Keywords: composite; crack; doi; epoxy; frattura; integrità; patch; plate; repair; stresses; strutturale
• Stress intensity factors for mixed-mode crack growth in imitation models under biaxial loading by Yarullin, Rustam; Shlyannikov, V.N. ; Ishtyriakov, I.S. ; Yakovlev, M.M. (2020) - Surface crack growth in cylindrical hollow specimen subject to tension and torsion, Frattura ed Integrita Structurale, 33, pp. Effect of temperature on the growth of fatigue surface cracks in aluminum alloys, Theoret. Keywords: biaxial; compressor; conditions; crack; disk; doi; fatigue; fracture; growth; imitation; imitation model; loading; model; plastic; sifs; stress; surface
• Plastic stress intensity factor behavior at small and large scale yielding by Zakharov, Alexander; Shlyannikov, Valery; Tartygasheva, Anastasia (2020) - Biaxial loading; J-integral; Plastic stress intensity factor; Mixed mode loading. The plastic SIF values under the equibiaxial tension- compression (η = -1) are higher than plastic SIF at the equibiaxial tension (η = +1). Keywords: biaxial; crack; loading; mode; plastic; plastic sif; scale; stress; tip; yielding
• Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure by Mechab, Belaïd; Salem, Mokadem; Malika, Medjahdi; Boualem, Serier (2020) - Je J Je o of dF j dj (14) Or the probability density function (PDF), where ( / )( )J Je oF j . is the cumulative distribution function of (J/Je) and ƒx(x) is the known joint probability density function of X. Variable Mean Coefficient of variation (COV) Probabilistic fracture assessment of surface cracked pipes using strain-based approach, Eng. Keywords: analysis; crack; doi; fracture; pipes; pressure; probability; surface
• Numerical analysis of reinforced concrete beams pre cracked reinforced by composite materials by Benaoum, Fatima; Khelil, Foudil; Benhamena, Ali (2020) - Microsoft Word - numero_54_art_21_2806 F. Benaoum et al, Frattura ed Integrità Strutturale, 54 (2020) 282-296; DOI: 10.3221/IGF-ESIS.54.20 282 Numerical analysis of reinforced concrete beams pre-cracked reinforced by composite materials Fatima Benaoum, Foudil Khelil, Ali Benhamena University of Mascara, Laboratory of Quantum Physics of Matter and Mathematical Modeling (LPQ3M), Mascara 29000, Algeria. Citation: Benaoum, F., Khelil, F., Benhamena, A., Numerical analysis of reinforced concrete beams pre-cracked reinforced by composite materials, Frattura ed Integrità Strutturale, 54 (2020) 282-296. Keywords: beam; concrete; crack; deflection; doi; effect; fiber; fig; frp; length; load; patch; properties; strength; structures; study
• Risk based analysis of RHPP penstock structural integrity by Kirin, Snežana; Jeremić, Lazar; Sedmak, Aleksandar; Martić, Igor; Sedmak, Simon; Vučetić, Ivana; Golubović, Tamara (2020) - Geometry parameters F and Q are calculated for tensile plate with a surface crack (a/2c=0.13 for ¼ crack and ≤1) at the point of maximum stress intensity factor (φ=900) as follows: 1.65 1 1.464 1.08 c Q a        for ¼ crack and 1.22 and for ½ crack, 2 4 1 2 3 1.102w a a F M M M gf f t t                     for ¼ crack and 1.033 and for ½ crack, 1 1.13 0.09 1.106 c M a         for ¼ crack and 1.108 and for ½ crack, 2 0.89 0.54 1.39 1 / M a c     for ¼ crack and 0.7 and for ½ crack, 24 3 1 0.5 14 1 0.589 0.65 a M a c c           for ¼ crack and -0.355 and for ½ crack,  Keywords: assessment; crack; integrity; kirin; mpa; p=12.05; p=9.02; penstock; risk; sedmak
• Finite element analysis of the behavior of bonded composite patches repair in aircraft structures by El-Sagheer, Islam; Taimour, Mai; Mobtasem, Mariam; Abd-Elhady , Amr; Sallam, Hossam El-Din M. (2020) - CONCLUSION rom the present numerical work, it can be concluded that:  The efficiency of the composite patch is depend on the fiber orientation with respect to the load direction, where the higher efficiency of composite repaired patch happens when it has a higher stiffness in the direction parallel to the load direction (Mode-I), whatever the value of the inclined crack angle. Composite patches are used over the cracked area that prevents or delays crack propagation due to the reduction in the stress intensity factor [1–9]. Keywords: composite; crack; effect; patch; plate; repair
• A closed form for the Stress Intensity Factor of a small embedded square-like flaw by Livieri, Paolo; Segala, Fausto (2020) - [18] numerically solved the case of square crack with a small rounded apex. (12) and (17) allow us to numerically evaluate the SIF at the two characteristic points A and B of the square- like crack without any specific computer strategies [17]. Keywords: crack; factor; integral; intensity; like; livieri; point; stress
• Strain-gradient effect on the crack tip dislocations density by Shlyannikov, Valery; Tumanov, Andrey; Khamidullin, Ruslan (2020) - [8] supplemented the formulation which is referred to as the mechanism-based theory of strain gradient plasticity (MSG), where the characteristic length of the material structure corresponds to the scale at which the effects of the gradients are comparable with the strain values. [10] numerical crack tip fields in strain gradient plasticity. Keywords: crack; crack tip; density; dislocations; gradient; material; plasticity; strain; strain gradient; stress; theory; tip
• Numerical analysis of the influence of maximum residual thermal stresses on the intensity factor between the matrix and particle interfaces in metal matrix composite by Nehari, Taieb; Bahram, Kaddour; Nehari, Driss; Marni Sandid , Abdelfatah (2020) - T. Nehari et alii, Frattura ed Integrità Strutturale, 54 (2020) 275-281; DOI: 10.3221/IGF-ESIS.54.19 280 The effect of residual stresses on the intensity factor The results obtained in this part of the work show that under the effect of residual stress, a crack, initiated in the matrix, propagates in pure mode I when its front is located relatively far from the interface with the particle and in mixed mode I, II and III when its front approaches this interface. This article discusses the influence of maximum residual stresses on the intensity factor. Keywords: analysis; crack; doi; effect; intensity; interface; matrix; particle; stresses; thermal
• Influence of contact parameters in fretting-fatigue contact 3D problems by Hamadouche, Fella; Benzaama, Habib; Mokhtari, Mohamed; Abbes Tahar, Miloud (2020) - A comparison of relative displacement fields between numerical predictions and experimental results in fretting contact, Proc. IMechE, Part J: J. Engineering Tribology, 230(10), 1273–1287. [15] used the maximum shear stress range criterion, the maximum relative slip amplitude and the maximum tangential stress range criterion to predict the location of fretting fatigue crack nucleation and the fretting fatigue crack path with cylindrical-on- flat contact. Keywords: contact; crack; division; fatigue; k0 σ; mesh; stress
• Influence of stress ratio on residual stress evolution near cold-expanded hole due to low-cycle fatigue by crack compliance data by Chernov, Andrey; Eleonsky, Sviatoslav; Pisarev, Vladimir (2020) - Metal-composite joints; Cold hole expansion; Residual stress intensity factor; Residual stress. Residual stresses have a beneficial effect on lifetime of pin/rivet joints with cold-expanded holes. Keywords: crack; cycle; doi; fatigue; hole; length; loading; sif; specimens; stress; values
• Effect of thermomechanical processing defects on fatigue and fracture behaviour of forged magnesium by Gryguc, Andrew; Behravesh, S.B. ; Jahed, H.; Wells, M.; Williams, B. ; Gruber, R.; Duquett, A.; Sparrow, T.; Lambrou, M.; Su, X. (2020) - Characterization of the as-forged properties of forged Mg components in recent years has become T A. Gryguć et alii, Frattura ed Integrità Strutturale, 55 (2021) 213-227; DOI: 10.3221/IGF-ESIS.55.16 215 more widespread in literature. This work aims to investigate the effects of thermomechanical processing defects on the fatigue behaviour of forged Mg components by using the material properties extracted from the small-scale specimens which are free of macroscopic defects from within the forged component whilst comparing and contrasting them with the component level behaviour under in-service loading in a realistic forged component with varying levels of defect intensities. Keywords: az80; component; crack; defects; doi; fatigue; fig; forging; fracture; loading; location; magnesium; strain; surface
• A brief review of fatigue design criteria on offshore wind turbine support structures by Mendes, Paulo; Correia, José A.F.O.; De Jesus, Abílio M.P.; Ávila, Bianca ; Carvalho, Hermes; Berto, Filippo (2020) - Offshore wind turbine fatigue loads: The influence of alternative wave modeling for different turbulent and mean winds. [38] is a common method to estimate the fatigue life of structures submitted to a history of variable loads based on a series of fatigue stresses with constant amplitudes. Keywords: analysis; crack; damage; design; engineering; fatigue; frattura; joints; loads; mendes; stress; structures; strutturale; turbine; wave; wind
• Experimental investigation of cracking behaviors of ductile and brittle rock-like materials by Bai, Hao; Du, Wei; Shou, Yundong; Chen, Lichuan; Berto, Filippo (2021) - The cracking mechanisms of rocks have been studied experimentally on rock-like materials or rock materials, and rock-like materials are widely used because the flaws are easy to be fabricated. The effect of specimen shape and strain rate on uniaxial compressive behavior of rock material, Bull. Keywords: barite; content; crack; doi; m p; materials; polyamide; rock; rosin; rosin content; rubber; sand; silicone; stress
• Repair and rehabilitation of corroded HDPE100 pipe using a new hybrid composite by Regad, Abdelmalek; Benzerga, Djebara; Berrekia, Habib; Haddi , Abdelkader; Chekhar, Nourredine (2021) - To answer this problem, we will first study the mechanical behavior at failure of HDPE pipes in the presence of a surface defect using a finite element method. These results show that the new hybrid composite can be used in the rehabilitation and repair of HDPE pipes used for the transport of drinking water. Keywords: composite; crack; defect; doi; hdpe; pipe; pressure; repair; tube
• Study of mechanical behavior by fatigue of a cracked plate repaired by different composite patches by Moulgada, Abdelmadjid ; Ait kaci, Djafar; Zagane, Mohammed El Sallah ; Abderrahmane, Sahli; Zahi, Rachid (2021) - The effects of the load ratio on both the repaired and not repaired plates, by two composite patches, which are boron/epoxy and graphite/epoxy, were investigated, as well as the effect of the plate material on plate life, comparing different materials. Investigation into cracked aluminum plate repaired with bonded composite patch. Keywords: composite; crack; effect; epoxy; fatigue; life; load; plate
• Computation of mode I strain energy release rate of symmetrical and asymmetrical sandwich structures using mixed finite element by Mohamed Ben Ali, Amina; Bouziane, Salah; Bouzerd, Hamoudi (2021) - Citation: Mohamed Ben Ali, A., Bouziane, S., Bouzerd, H., Computation of mode I strain energy release rate of symmetric and asymmetrical sandwich structures using mixed finite element, Frattura ed Integrità Strutturale, 56 (2021) 229-239. Symmetrical Double Cantilever Beam (DCB) test The specimens used to model the pure mode I strain energy release rates of the symmetrical sandwich structure are of the type Double Cantilever Beam(DCB), the core–skin interfaces of which are shown schematically in the Fig. Keywords: beam; crack; element; energy; energy release; mode; rate; release; release rate; sandwich; strain
• Analysis of fracture processes in reinforced concrete beams without stirrups by Słowik, Marta (2021) - The analysis of fracture processes which led to shear failure in reinforced concrete beams without transverse reinforcement was performed on the basis of test results from the author’s own experimental investigation and numerical simulations. Citation: Słowik M., Analysis of fracture processes in reinforced concrete beams without stirrups, Frattura ed Integrità Strutturale, 57 (2021) 321-330. Keywords: beams; capacity; concrete; crack; failure; ratio; reinforcement; shear; span
• Mixed Finite Element Computation of Energy Release Rate in Anisotropic Materials Based on Virtual Crack Closure-Integral Method by Derouiche, Sami; Bouziane, Salah; Bouzerd, Hamoudi (2021) - The rotating material axes investigate the anisotropy of material and help to approves the new finite element methods [19] such as the scaled boundary finite element method Two-dimensional analysis of anisotropic crack problems using coupled meshless and fractal finite element method, Int. Keywords: anisotropic; crack; doi; element; finite; method
• Numerical prediction of the ductile damage for axial cracks in pipe under internal pressure by Fezazi, Amina Ismahène; Mechab, Belaïd; Mokadem, Salem; Serier, Boualem (2021) - This study provides engineering J estimation for the ductile fracture mechanics of cracked pipe subjected to internal pressure. [24].In this part a probabilistic fracture mechanics model established from three-dimensional FEM analyses of axial cracked pipes subjected to internal pressure. Keywords: crack; doi; fracture; integral; pipe; plastic; pressure
• Inverse problems with the digital image correlation: approach and applications by Sgambitterra, Emanuele; Niccoli, Fabrizio (2021) - Stress intensity factor measurements from digital image correlation: post-processing and integrated approaches, Int. Figure 12: Stress intensity factor KI, measured with both the regression approach and the analytical one, as a function of the applied load during a complete loading-unloading cycle. Keywords: case; correlation; crack; displacement; doi; fig; image; load; parameters; sgambitterra; stress;  
• Fracture analysis of AA6061-graphite composite for the application of helicopter rotor blade by Doddamani, Saleemsab; Chao Wang; Jinnah, M. Sheik Mohamed; Md. Arefin Kowser (2021) - The main objective of the work is to study the fracture behavior of AA6061-graphite material using both experimental technique and finite element simulation by considering helicopter rotor blade as a case study. Citation:Doddamani, S., Wang, C., Jinnah, M.S.M., ArefinKowser, Md., Fracture analysis of AA6061-graphite composite for the application of helicopter rotor blade,Frattura ed IntegritàStrutturale, 58 (2021) 191-201. Keywords: aa6061; blade; composites; crack; doi; fracture; graphite; helicopter; rotor; toughness
• Asymptotic response of friction stir welded joint under cyclic loading by Elmeguenni, Imane (2021) - The numerical tests in traction-traction (R = 0.1) allowed to highlight the heterogeneities of cyclic mechanical behavior in each of the zones constituting the joint 2024-T351 welded by FSW. Simulation of fatigue crack growth in friction stir welded joints in 2024-t351 al alloy, Suranaree J. Sci. Keywords: behavior; crack; cyclic; doi; fatigue; fsw; joint; xfem; zones
• A new methodology to predict damage tolerance based on compliance via global-local analysis by Gomes, Gilberto; Oliveira, Thiago A A; Delgado Neto, Alvaro M (2021) - That author performs a statistical analysis to control the propagation of fatigue cracks and considers inspection intervals in order to ensure that the probability of complete failure of the structure is always kept low. [4] has been a pioneer in this new concept, performing a statistical analysis to control fatigue crack propagation and considering inspection intervals to keep the probability of complete failure low. Keywords: aircraft; analysis; compliance; crack; cycles; damage; doi; fatigue; fig; figure; gomes; number; stress
• Influence of themo-mechanical treatments and microstructural state on the fatigue behaviour of a weald seam: case of API X60 steel by Achoui , Mohammed; Sebaa, Fethi ; Bouchouicha, Benattou (2021) - Fatigue crack propagation in welded joints X70. Fatigue crack propagation in 2.25 Cr–1.0 Mo steel weldments in air and hydrogen. Keywords: crack; doi; fatigue; frattura; integrità; strutturale
• Numerical modelling in non linear fracture mechanics by none (2013) - Alterna- tively, the prediction of crack growth may be directly based on the fracture mechanism operating on the micro- scale, either by incorporating the failure mechanism in the constitutive equations for the material, or by repre- senting the failure mechanism through a cohesive zone model of the fracture process zone. The present paper will give a survey of a number of investigations where the prediction of crack growth has been based on models of the actual fracture mechanism. Keywords: crack; damage; failure; growth; material; model; tvergaard
• Some practical crack path examples by none (2013) - The forthcoming ESIS International Conference on Crack Paths (CP 2006) will be devoted to consideration of crack paths at various scales. They have been chosen to illustrate various aspects of crack paths. Keywords: crack; fatigue; figure; fracture; growth; notch; path
• Damage severity for cracked simply supported beams by Samir Mohamed Mohamed Soliman, Ehab (2021) - E.S.M.M. Soliman, Frattura ed Integrità Strutturale, 58 (2021) 151-165; DOI: 10.3221/IGF-ESIS.58.11 155 MODEL OF DAMAGED BEAM n this study, an aluminum damaged simply supported beam model with single open edge crack of depth (s) at distance (Lc) from left hand support of beam as shown in Figure 1 is used to determine crack damage severity and modal parameters for cracked beam. In the analysis for the three scenarios of cracked beam, the location of crack is measured from left hand support of beam (LHS) as considered in [17]. Keywords: beam; crack; doi; figure; frequency; mode
• Crack prediction in beam-like structure using ANN based on frequency analysis by Seguini, Meriem; Djamel, Nedjar; Djilali, Boutchicha; Khatir, Samir; Abdel Wahab, Magd (2021) - Identification of cracking in beam structures using Timoshenko and Euler formulations, J. Eng. Genetic algorithm based objective functions comparative study for damage detection and localization in beam structures. Keywords: beam; crack; depth; doi; mode
• Elastic-plastic fracture analysis of anisotropy effect on AA2050-T84 alloy at different temperatures: A Numerical Study by Kodancha, Krishnaraja; Ekabote, Nagaraj; Revankar, P P (2021) - Figs. 13 to 18 present the variation of J-integral, CMOD and CTOD at different plate locations dependent on plate temperature and orientations. These parameters relative values provided insight into the behavioral aspects of T N. Ekabote et alii, Frattura ed Integrità Strutturale, 59 (2022) 78-88; DOI: 10.3221/IGF-ESIS.59.06 82 the plate under constant external load subjected to different plate orientations. Keywords: constraint; crack; cryogenic; fracture; integral; location; orientation; plate; temperature; variation
• 3D crack identification using the Nelder-Mead Simplex algorithm combined with a random generation of crack positions by Amoura, Nasreddine; Kebir, Hocine; Benzerdjeb, Abdelouahab (2021) - The random generation of crack identities may produce cracks that lie out of the domain’s boundaries. To overcome this shortcoming, a low-discrepancy sequence has been used to generate a sample of crack identities, uniformly distributed over the entire domaine of interest. Keywords: algorithm; boundary; convergence; crack; doi; figure; identification; identity; method; nmsa; solution
• Mode I stress intensity factor with various crack types by Samir Mohamed Mohamed Soliman, Ehab (2021) - CONCLUSION EA were performed for cases of cracked finite plate with three types of crack, single edge crack, center crack and double edge crack under tensile stress with different values, then the numerical values of Von-Mises stress and mode I SIF are obtained. Three cases of cracked plate with three different types of cracks are assumed in this work, i.e., single edge crack, center crack and double edge crack. Keywords: crack; edge; fea; intensity; mode; plate; stress;  
• A probabilistic fatigue crack growth life approach to the definition of inspection intervals for railway axles by Mallor, C.; Calvo, S.; Nuñez, J.L.; Rodriguez-Barrachina, R.; Landaberea, A. (2021) - Probabilistic fatigue crack growth; Damage tolerance; Inspection intervals; Probability of detection; NASGRO. Probabilistic fatigue crack growth life Starting from the assumption of an initial crack-like defect (step 1), the crack growth simulation (step 2) considers: (i) the component geometry and dimensions; (ii) the loading conditions including the bending moment (cyclic), the load spectra (in-service load sequences) and the press-fit (static); (iii) the material properties, primary the da/dN–ΔK curve and (iv) the considered crack growth equation, commonly the NASGRO model. Keywords: axles; crack; crack growth; damage; distribution; doi; failure; fatigue; fatigue crack; growth; inspection; life; lifespan; probabilistic; probability; railway; reliability; tolerance
• Effect of petrographic composition and chemistry of aggregate on the local and general fracture response of cementitious composites by Vyhlídal, Michal; Rozsypalová, Iva; Šimonová, Hana; Kucharczyková, Barbara; Vavro, Leona; Vavro, Martin; Němeček, Jiří; Rovnaníková, Pavla; Keršner, Zbyněk (2022) - This paper concerns the results of research into the influence of the composition of rock inclusions on the fracture response of cement-based composite specimens. These specimens, which were made of fine-grained cement-based composite with different types of rock inclusion – amphibolite, basalt, granite, and marble – were tested in the three-point bending configuration. Keywords: amphibolite; basalt; cement; chemical; composition; correlation; crack; doi; fracture; granite; inclusion; influence; marble; matrix; parameters; properties; rock; specimens; test; vyhlídal
• Crack suppression by natural fiber integration for improved interlaminar fracture toughness in fiber hybrid composites by Gouda, Shivakumar; Joshi, Anant; I, Sridhar; M A, Umarfarooq; Uppin, Vinayak; Vastrad , Jyoti; Gogoi, Nabaneeta; Edacherian, Abhilash (2022) - Microsoft Word - numero_60_art_12_3331.docx A. Joshi et alii, Frattura ed Integrità Strutturale, 60 (2022) 158-173; DOI: 10.3221/IGF-ESIS.60.12 158 Crack suppression by natural fiber integration for improved interlaminar fracture toughness in fiber hybrid composites Anant Joshi Department of Mechanical Engineering, KLS VDIT, Haliyal, Research Center, Department of Mechanical Engineering SDMCET, Dharwad, Visvesvaraya Technological University, Karnataka, India. Figure 6: XRD curves for (a) Kenaf (b) Hibiscus and (c) Jute fibers The XRD curves indicated that the cellulose content of Natural fiber reinforced hybrid composites exhibited crystalline nature but lignin and hemi-cellulose content exhibited amorphous nature. Keywords: carbon; composites; crack; doi; epoxy; fiber; fracture; fracture toughness; glass; hybrid; interlaminar; mode; toughness; values
• Crack paths in multiaxial fatigue of C45 steel specimens and correlation of lifetime with the thermal energy dissipation by Rigon, Daniele; Berto, Filippo; Meneghetti, Giovanni (2021) - Figure 2: Specimen’s geometry for multiaxial fatigue tests (units: ANALYSES OF THE SPECIFIC HEAT LOSS PER CYCLE DURING MULTIAXIAL FATIGUE TESTS he results expressed in terms of von Mises equivalent stress, σeq,VM, of all fatigue tests taken from [19] are reported in Fig. Keywords: crack; doi; energy; fatigue; heat; loading; phase; plane; shear; specimens; stress
• FFS Master Software For Fitness-For-Service Assessment of Hydrogen Induced Cracking Equipment Based on API 579-1/ASME FFS-1 by Karimihaghighi, Razieh; Naghizadeh, Masoumeh; Javadpour, Sirus (2022) - The steps for Level 1 of HIC assessment are listed below. Required Data/Measurements for FFS Assessments The required data measurements for the Level 1 and 2 assessments for HIC damage is listed below and some of them are illustrated in Figure 2. Engineers(s) are required to measure the necessary data to perform the assessment. Keywords: assessment; crack; damage; doi; figure; flaw; frattura; hic; hydrogen; integrità; joint; karimihaghighi; level; metal; size; software; strutturale; weld
• Influence of the interphase between laser-cladded metal layer and steel substrate on fatigue propagation of a short edge crack by Malikova, Lucie; Doubek, Pavel; Miarka, Petr; Seitl, Stanislav (2021) - As a result, bi-material interfaces now occur in real structures and can affect fatigue crack propagation. Thus, fatigue crack propagation is expected and shall be assessed via the usual methods. Keywords: crack; doi; fatigue; gpa; interphase; interphase layer; layer; material; metal; propagation; properties; steel; stress; substrate; surface
• Fracture toughness of matrix cracked FRC and FGC beams using equivalent TPFM by Sallam, Hossam El-Din M.; Elakhras, Ahmed; Seleem, Mohammad (2022) - All values of the experimental and predicted results of A. Elakhras et alii, Frattura ed Integrità Strutturale, 60 (2022) 73-88; DOI: 10.3221/IGF-ESIS.60.06 85 CMODCwere in the range of 0.028 to 0.06 mm, and 0.038 to 0.071 mm for MC FD FRC and MC-FGC, respectively. The presence of the softening portion in FGC beam specimens reflects the efficiency of the proposed new matrix crack technique in simulating a real field crack in the laboratory. Keywords: beams; concrete; crack; doi; etpfm; fd frc; fgc; fracture; frc; maximum; specimens; stress
• Flexural behaviour of reinforced concrete beams strengthened by NSM technique using ECC by Awad, Fady; Husain, Mohamed ; Fawzy , Khaled (2022) - Flexural behaviour of ECC layered reinforced concrete beams The four-point load test is applied on the reinforced concrete beams on the effective span of 1300 mm, and tests have been carried out at room temperature and as per standards. Concrete crack patterns at ECC beam (B 03). Keywords: awad; beam; concrete; crack; doi; ecc; failure; fiber; fig; frattura; integrità; load; properties; steel; strength; strutturale; tensile
• Analysis of the adhesive damage for different shapes and types patch’s in Aircraft Structures corroded with an inclined crack by Berrahou, Mohamed; Benzineb, Hayet; Serier, Mohamed (2022) - Analysis of the adhesive damage for different patch shapes in bonded composite repair of corroded aluminum plate, J. Techno. The area of the damaged zone was calculated for different parameters such as the following effects, patch shapes (rectangular, trapezoidal, and circular), patch types (Boron/epoxy, Graphite/epoxy and Glass/epoxy) and crack inclination under thermo-mechanical loading. Keywords: adhesive; area; composite; crack; doi; epoxy; factor; inclination; intensity; mode; patch; stress; temperature; variation
• PVC failure modelling through experimental and digital image correlation measurements by Zekriti, Najat; Majid, Fatima; Rhanim, Rajae; Mrani, Ibrahim; Rhanim, Hassan (2022) - Power plot of crack growth rate; (b) logarithmic crack growth rate. PVC sheets' stress intensity factors were evaluated using both theoretical and experimental approaches to model crack growth. Keywords: crack; crosshead; doi; factor; fracture; growth; length; mechanics; min; pvc; rate; speed; stress; zekriti
• Mesoscale investigation of mass concrete temperature control systems and their consequences on concrete mechanical behaviour. by Matallah, Mohammed; Taibi, Abdelsemi; Chimoto, T.T.; Maradzika, F.K. (2022) - Firstly, a Chemo- Thermo-Mechanical model is developed to investigate the initial stress state of early age hydration concrete followed by a mechanical analysis of the consequences brought by this initial state. 10 shows damage and crack opening evolution of early age concrete and concrete without early age under traction loading. Keywords: age; aggregate; behaviour; concrete; cooling; crack; damage; doi; hydration; integrità; model; openings; pipe; stress; temperature
• Hybrid phase-field modeling of multi-level concrete gravity dam notched cracks by Mazighi, Hichem ; Mihoubi, Mustapha Kamel ; Santillan Sanchez, David (2022) - We account for the pressure load inside the fracture, and we study the effect of the position and number of initial fractures in the upstream face and the value of the Griffith critical energy release, on the fracture propagation under a flood event. We study the influence of the initial crack level, the number, and length of initial fractures, as well as the value of the critical energy dissipation on the behavior of the dam under a flood event. Keywords: case; concrete; crack; crest; displacement; doi; eng; field; fracture; mech; model; overflow; phase; propagation; step
• Fatigue crack growth analysis of welded bridge details by D'Angela, Danilo; Ercolino, Marianna (2022) - The extended finite element method (XFEM) is among the most advanced technologies for simulating fracture phenomena, and several recent studies proved that it could be reliable also regarding fatigue crack propagation in metals The case study consists of welded bridge details, which are critical systems undergoing fatigue crack propagation and are less studied in the literature. Keywords: analysis; crack; doi; fatigue; model; numerical; results
• Investigation fatigue crack initiation and propagation cruciform welded joints by extended finite element method (XFEM) and implementation SED approach by Djeloud, Hamza; Moussaoui, Mustafa; Kellai, Ahmed ; Hachi, Dahmane ; Berto, Filippo; Bouchouicha, Benattou; Hachi, Brahim Elkhalil (2022) - Fatigue crack growth and arrest under high-cycle thermal loading using XFEM in presence of weld residual stresses, Transactions, 415 (figure 4). XFEM simulation of fatigue crack growth in a welded joint of a pressure vessel with a reinforcement ring, Arch. Keywords: approach; crack; cruciform; density; doi; energy; eng; fatigue; joints; mode; sif; strain; stress; xfem; zone
• Predictive Modelling of Creep Crack Initiation and Growth using Extended Finite Element Method (XFEM) by Meor Ahmad, Meor Iqram ; Mohd Sabri, Mohd Anas ; Mat Tahir, Mohd Faizal; Abdullah, Nur Azam (2022) - Figure 10: Relationship between XFEM calculated creep crack growth length and normalized time (c) M. I. Meor Ahmad et alii, Frattura ed Integrità Strutturale, 61 (2022) 119-129; DOI: 10.3221/IGF-ESIS.61.08 128 Figure 11: Comparison of XFEM calculated creep crack growth rate versus C(t)-integral with experimental data. A model of creep fracture initiation and creep crack growth (CCG) is developed, while the XFEM is employed to spots located inside the finite element for the purpose of predicting crack potential and propagation. Keywords: crack; creep; creep crack; element; finite; fracture; growth; specimen; stress; xfem
• An experimental study and a proposed theoretical solution for the prediction of the ductile/brittle failure modes of reinforced concrete beams strengthened with external steel plates by Nguyen Van, Hau; Bui Tien, Thanh; Pham Van, Phe; Nguyen-ngoc, Long (2022) - Then, a new theoretical model is successfully developed to predict the rupture mechanism of the RC beams strengthened with external steel plates. Nguyen, V.-H., Bui-Tien, T., Pham, P. V., Nguyen-Ngoc, L., An experimental study and a proposed theoretical solution for the prediction of the ductile/brittle failure modes of reinforced concrete beams strengthened with external steel plates, Frattura ed Integrità Strutturale, 61 (2022) 198-213. Keywords: beam; concrete; crack; doi; ductile; experimental; failure; fig; plate; present; results; slip; steel; steel plate; strength; study
• Composite lay-up configuration effect on double and single sided bonded patch repairs by Achour, Toufik; Mili, Fayçal (2022) - Double sided bonded repair (Fig.1-a), and single sided bonded repair (Fig.1-b). The second; when the crack length exceeds half of the composite patch length for the single sided bonded configuration, the repair by bonded composite patch loses its effectiveness. Keywords: adhesive; bonded; composite; configuration; crack; intensity; patch; repair; stress
• Fatigue growth rate of inclined surface cracks in aluminum and titanium alloys by Yarullin, Rustam; Yakovlev, Mikhail (2022) - Surface crack growth in cylindrical hollow specimen subject to tension and torsion, Frattura ed Integrita Structurale, 33, pp. The plates with surface cracks as well as the modified ASTM E740 Keywords: alloys; conditions; crack; doi; fatigue; fracture; growth; loading; mode; sct; sifs; specimens; surface; titanium
• Multiple linear regression parameters for determining fatigue-based entropy characterisation of magnesium alloy by Fauthan, Mohd 'Akashah; Abdullah, Shahrum; Abdullah, Mohamad Faizal; Mohamed, Intan Fadhlina (2022) - Rapid estimation of fatigue entropy and toughness in metals, Mater. On the evaluation of fracture fatigue entropy, Theor. Keywords: crack; doi; energy; entropy; fatigue; generation; growth; life; load; mlr; stress; temperature; value
• Predicting Fatigue Crack Growth Behavior of Coalesced Cracks Using the Global-Local Superimposed Technique by Shaari, Mohd Shamil; Urai, Sylvia; Takahashi, Akiyuki; Mohd Romlay, Mohd Akramin (2022) - The following section will describe the process for simulating crack growth using the S-version FEM. By computing the stress condition at the crack tip, the SIF is primarily utilized in fracture mechanics to forecast crack growth. Keywords: crack; doi; fem; fig; growth; mesh; sif; stress; version
• Numerical Analysis of the Crack Growth Path in the Cement of Hip Spacers by Zengah, Sahnoun; Mankour, Abdeljelil; Abderahmane, Sahli; Salah, Hichem; Mallek, Abdelhafid; Bouziane, Mohammed Mokhtar (2022) - Figure 17: Stress Intensity Factor (KII) along the crack in the PMMA bone cement Figure 18: Stress Intensity Factor (KIII) along the crack in the PMMA bone cement S. Zengah et al., Frattura ed Integrità Strutturale, 61 (2022) 266-281; DOI: 10.3221/IGF-ESIS.61.18 278 Figure 19: Comparison of maximum stress intensity factor Mode I as a function of crack length and reinforcement type.  Stress intensity factor analysis shows that, cracks width larger than 0.8mm encourage the crack propagation under static loading. Keywords: bone; crack; fig; figure; hip; intensity; maximum; method; reinforcement; rod; spacer; stress; stresses
• Couple effects of temperature and fatigue, creep-fatigue interaction and thermo-mechanical loading conditions on crack growth rate of nickel-based alloy by Shlyannikov, Valery; Inozemtsev, Aleksandr ; Ratchiev, Aleksey (2022) - Influence of dwell time on fatigue crack growth in nickel-base superalloys, Mater. Thermal activation of fatigue crack growth: Analysing the mechanisms of fatigue crack propagation in superalloys, Mater. Keywords: conditions; crack; crack growth; creep; doi; fatigue; fracture; growth; harmonic; interaction; loading; rate; temperature; test
• Effect of cenosphere and specimen crack lengths on the fracture toughness of Al6061-SiC composites by Ashoka, E.; Sharanaprabhu, C. M.; Krishnaraja, G. Kodancha (2022) - Researchers [21-23] conducted experiments on effects of SiC reinforcements on Al matrix composites and recommended that the addition of SiC particulate particles to Al matrix up to certain limit will improve some mechanical properties such as: yield strength, modulus of elasticity, hardness etc. This can be overcome by using hybrid metal matrix composites (HMMS) which enhance its mechanical properties. Keywords: al6061; casting; cenosphere; composites; crack; doi; fracture; hybrid; integrità; matrix; properties; sic; strutturale; toughness
• Finite Fracture Mechanics and Cohesive Crack Model: Size effects through a unified formulation by Ferrian, Francesco; Cornetti, Pietro; Marsavina, Liviu; Sapora, Alberto (2022) -    d2 2 0              c cy c Finite fracture mechanics and cohesive crack model: Weight functions vs. cohesive laws, Int. Keywords: ccm; crack; doi; eqn; ffm; finite; fracture; size; stress
• Quantitative description of low-cycle fatigue damage accumulation in contact interaction zone by local strain evolution by Eleonsky, Sviatoslav; Matvienko, Yury; Pisarev, Vladimir; Odintsev, Igor (2022) - Necessity of various experimental investigations of fatigue damage accumulation, especially in the case of local elastic-plastic strains availability, is substantiated in Refs. On the other hand, numerous data demonstrate that the hole filled by a pin with a relative interference parameter    20.75 10 leads to a considerable growth in the material resistance to fatigue damage accumulation Keywords: accumulation; crack; cycle; cycle fatigue; damage; damage accumulation; doi; experimental; fatigue; hole; loading; matvienko; parameters; specimen; strain; stress
• Analysis of the resistance to crack propagation in SENT test specimens printed in ABS using parallel or crossed filaments between layers by Aourik, Oumaima; Chouaf, Abdelkerim; Othmani, Mourad (2022) - For configuration (2), which has crossed filament layers, the resistance to crack propagation is almost the same for all angle combinations, as shown by the KIC values in Tab. [18] Ameri, B., Taheri-Behrooz, F. and Aliha, M. R. M. (2021). Keywords: abs; angle; configuration; crack; filaments; kic; layers; propagation; raster; specimens; stress
• Experimental investigation on possible dependence of plastic zone size on specimen geometry by Kudari, S. K.; Maiti, B.; Ray, K. K. (2013) - Shot Peening Processes to obtain Nanocrystalline surfaces in metal alloys: S.K. Kudari et alii, Frattura ed Integrità Strutturale, 7 (2009) 57-64; DOI: 10.3221/IGF-ESIS.07.04 57 Experimental investigation on possible dependence of plastic zone size on specimen geometry S. K. Kudari School of Mechanical Engineering, Howard College Campus, University of KwaZulu-Natal, Durban- 4041, South Africa. [5] have theoretically studied the effect of specimen geometry on plastic zone size using the J-integral to explore the constraint effects. Keywords: crack; kudari; microhardness; plastic; results; size; specimen; stress; tip; zone
• Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening by Iziumova, Anastasia; Vshivkov, Aleksei; Prokhorov, Aleksandr; Gachegova, Elena; Davydov, Denis (2022) - Microsoft Word - numero_62_art_35_3742.docx A. Iziumova et alii, Frattura ed Integrità Strutturale, 62 (2022) 516-526; DOI: 10.3221/IGF-ESIS.62.35 516 Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening A. Iziumova, A. Vshivkov, A. Prokhorov, E. Gachegova Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia fedorova@icmm.ru, https://orcid.org/0000-0002-1769-9175 vshivkov.a@icmm.ru, http://orcid.org/0000-0002-7667-455X prokhorov.a@icmm.ru, http://orcid.org/0000-0002-6511-2105 gachegova.e@icmm.ru, https://orcid.org/0000-0001-6849-9889 D. Davydov Institute of Metal Physics of the Ural Branch of Russian Academy of Sciences (IMP UB RAS), Russia Ural Federal University (UrFU), Russia davidov@imp.uran.ru, https://orcid.org/0000-0003-1381-0929 ABSTRACT. The energy approach is widely used to propose fracture criteria and describe the evolution of fatigue crack [19–25]. Keywords: crack; doi; fatigue; field; heat; laser; lsp; material; propagation; scheme; specimens; stress; treatment
• Influence of hBN and MoS2 fillers on toughness and thermal stability of carbon fabric-epoxy composites by Rao, Yermal Shriraj; Basavannadevaru, Shivamurthy; Subbarao, Nanjangud Mohan; Shetty, Nagaraja (2022) - Influence of different carbon nanotubes on the mechanical properties of epoxy matrix composites – A comparative study, Composites Science and Technology, 65(15–16), pp. Table 1: Material combination and toughness of various filler loaded epoxy composites. Keywords: carbon; cfrec; composites; crack; doi; epoxy; fiber; fig; filler; fracture; gnps; hbn; materials; matrix; mode; mos2; neat; polymer; surface; toughness; wt.%
• Improvement of crack tip position estimation in DIC images by image processing methods by Zekriti, Najat; Majid, Fatima; Taoufik, Hachimi; Tounsi, Yassine; Rhanim, Rajaa; Mrani, Ibrahim; Rhanim, Hassan (2022) - Crack tip location, full-field data, ImageJ, DIC, PVC, Gaussian filter, Median filter, Unsharp Mask filter. Najat et alii, Frattura ed Integrità Strutturale, 63 (2023) 61-71; DOI: 10.3221/IGF-ESIS.63.06 65 In this study, two procedures are provided and assessed to detect crack tip location based on image processing methods. Keywords: crack; dic; doi; field; filter; image; method; noise; strain; tip
• The Stress Intensity Factor of convex embedded polygonal cracks by Livieri, Paolo; Segala, Fausto (2022) - Citation: Livieri, P., Segala, F., The Stress Intensity Factor of convex embedded polygonal cracks, Frattura ed Integrità Strutturale, 63 (2023) 72-79. Microsoft Word - numero_63_art_07_3908.docx P. Livieri et alii, Frattura ed Integrità Strutturale, 63 (2023) 71-79; DOI: 10.3221/IGF-ESIS.63.07 72 The Stress Intensity Factor of convex embedded polygonal cracks Paolo Livieri, Fausto Segala University of Ferrara, Department of Engineering, Italy paolo.livieri@unife.it, fausto.segala@unife.it ABSTRACT. Keywords: crack; factor; intensity; sif; stress
• Experimental and numerical inspection of cracks in ferrule cracking of BK1 cement crusher by Chorfi, Sofiane; Kamel, Fedaoui; Brahim, Necib (2023) - Figure 11: Chronology of crack propagation (a) Internal crack with a depth of 220 mm, (b) Crack which has just opened to the outside, and (c) Propagation of the crack in the external part. For this reason, designers of structures or any element subjected to cyclic loading must not only take into account the possibility of cracking, but also estimate the rate of crack propagation, to ensure that these cracks do not reach the critical length, which will inevitably lead to failure [5]. Keywords: bk1; cement; crack; depth; doi; fig; holes; inspection; length; mill; propagation; shell; stress; surface; ultrasonic
• Fault detection in beam structure using adaptive immune based approach by Sahu, Sasmita; Jena, Shakti (2023) - Practical solution needs a large quantity of sensors and robust system for data analysis. Then these data pool is trained in Clonal Selection Algorithm get the crack depth and crack location for a particular set of first three modal natural frequencies Keywords: acsa; algorithm; analysis; b b; beam; crack; damage; data; detection; immune; regression; results; selection
• Automatic detection of concrete cracks from images using Adam-SqueezeNet deep learning model by Wang, Lin (2023) - Image data preparation An image dataset of concrete crack images for classification was obtained from a total of 284 images (1706×1280 pixels, 8 bits, RGB channels) taken on the campus of Hefei University by a smartphone. Classify crack image using deep learning and explain WHY. https://github.com /KentaItakura/releases/tag/v1.1 Keywords: concrete; crack; cracksn; detection; doi; image; learning; level; model; network; size; squeezenet; system; training
• Multi-level Uncertain Fatigue Analysis of a Truss under Incomplete Available Information by Nonato, Raphael Basilio Pires (2023) - Furthermore, due to the application of the entropy concept, the fatigue crack growth boundaries and fatigue crack semi-width boundaries obtained provide the most unbiased fatigue crack design mapping. Fatigue Reliability Analysis of Motor Hanger for High-Speed Train Based on Bayesian Updating and Subset Simulation. Keywords: analysis; calculation; crack; doi; eqn; fatigue; information; level; model; reliability; srq; srqs; stress; strutturale; uiqs; uncertainty
• Crack simulation for the cover of the landfill – A seismic design by Namdar, Abdoullah; Karimpour-Fard, Mehran; Mughieda, Omer; Berto, Filippo; Muhammad, Nurmunira (2023) - In the event of seismic loading, landfill cover cracks extend more rapidly, resulting in a reduction in landfill seismic stability. Landfill displacement could be minimized using geomembrane Keywords: acceleration; alii; clay; cover; crack; displacement; doi; frattura; igf; integrità; landfill; model; namdar; node; numerical; simulation; strutturale
• Notch Sensitivity Study in U-notched Polymers Built by Additive Manufacturing (AM) by Diaz Rodriguez, Jorge Guillermo; Pertuz Comas, Alberto David; Sandoval Herrera, Juan David (2023) - The stress concentrator factor, Kf, made a difference for notched specimens under fatigue load. Looking at the results in Tab. 3, one sees greater notch sensitivity for the larger notches. Keywords: crack; doi; fatigue; fiber; fig; load; material; matrix; notch; rodríguez; sensitivity; stress; tests
• Crack identification in plates-type structures using natural frequencies coupled with successful history-based adaptive differential evolution algorithm by Chahira, Brihmat; Amoura, Nasreddine; Lecheb, Samir; Kebir, Hocine; Ait Chikh, Mohamed Abdessamed; Tablit, Bassima (2023) - B. Chahira et al, Frattura ed Integrità Strutturale, 66 (2023) 207-219; DOI: 10.3221/IGF-ESIS.66.13 214 Modes Uncracked plate frequencies (Hz) Cracked plate frequencies (Hz) Differences (%) 1 60.39 55.93 -7.39 2 85.62 79.50 -7.15 3 110.25 115.12 4.42 4 140.75 133.12 -5.42 5 170.87 165.00 -3.44 6 182.63 176.25 -3.49 7 200.37 198.75 -0.81 8 250.59 244.87 -2.28 9 274.62 265.12 -3.46 10 282.94 273.00 -3.51 Table 3: Experimental natural frequencies of a clamped cracked and crack-free plate. Modes Experimental frequencies (Hz) Numerical frequencies (Hz) Differences (%) 1 55.93 53.20 -4.88 2 79.50 79.43 -0.09 3 115.12 116.73 1.40 4 133.12 137.44 3.25 5 165.00 166.26 0.76 6 176.25 175.04 -0.69 7 198.75 201.44 1.35 8 244.87 244.73 -0.06 9 265.12 264.24 -0.33 10 273.00 275.13 0.78 Table 4: Numerical and experimental natural frequencies of a cracked plate having a crack length of 120mm inclined by 35°. Keywords: algorithm; crack; frequencies; function; identification; length; method; objective; optimization; parameters; plate; structures
• Variation of stress intensity factor and elastic T-stress along the crack-front in finite thickness plates by Kodancha, K. G.; Kudari, S. K. (2013) - Using superscript ‘L’ to designate the stress and displacement fields, the analytical solution [16] gives: Stress field: s q p = 3 11 cos ,L f r s q q p = 2 22 cos sin ,L f r s n q p =33 cos ,L f r s s= =13 23 0L L s q q p = 2 12 sin cos ,L f r (1) and displacement field : n q p n ì üæ öï ï- This analysis provides the validation of the present FE computation in 2D. A series of 3D FE stress analyses have been carried out on SENT specimens with varied thickness and a/W ratio, to study the variation of T-stress along the crack-front (Effect of thickness).The obtained T-stress results are normalized with respect to applied stress (). Keywords: analysis; constraint; crack; specimen; stress; thickness; variation
• The effect of beam width and crack-depth ratio on mode I fracture toughness of RCB: an experimental and numerical study by Ahmad, Seleem; Gamiaa, Ghada; El-Kholy, Abd El-Monem (2023) - The results demonstrate that utilizing the brittleness number for notch sensitivity analysis is suitable for reinforced concrete beams to determine fracture parameters in fracture tests. The main focus was to analyze the impact of beam width (b), 120 and 250 mm, and crack-to-depth ratio (a/d) - 0.1, 0.2, and 0.3 on stress intensity factor and fracture energy for reinforced concrete beams, RCB. Keywords: beam; concrete; crack; doi; fracture; increases; k1c; numerical; results; steel; stress; toughness; width
• Crack resistance of carbonized layer of multilayer polyurethane with nanofillers. Combination of casting, solution, carbonization by ion implantation technologies by Izyumov, Roman; Svistkov, Alexander; Chudinov, Vyacheslav; Osorgina, Irina; Pelevin, Alexander (2023) - CONCLUSIONS - Multilayer polyurethane samples consisting of polyurethane layers produced by casting and solution technology, carbonized polyurethane layers produced by ion implantation treatment and polyurethane layers with nanofillers were investigated. There is a number of works [30], in which the influence of fatigue loading on the state of carbonized polyurethane layer is investigated. Keywords: carbon; crack; fluence; ion; ions; layer; polyurethane; samples; surface
• Revisiting classical concepts of Linear Elastic Fracture Mechanics - Part I: The closing ‘mathematical’ crack in an infinite plate and the respective Stress Intensity Factors by Markides, Christos; Kourkoulis, Stavros K (2023) - It is to be clarified here that overlapping of crack lips is not a naturally observable phenomenon In the light of the above-mentioned discussion, it can be safely concluded that the problem of overlapping crack lips is not as yet closed, although it is definitely indicated by many researchers that, in case it is ignored quite erroneous results are obtained, concerning both the stress field and, also, the values of the respective SIFs. Keywords: case; contact; crack; crack lips; doi; friction; overlapping; plate; problem; stresses;  ;  ;  ;  ;  
• Notiziario IGF by Iacoviello, Francesco (2009) - Editoriale del Presidente IGF; 2) Verbale dell’Assemblea Annuale dei Soci 2008; 3) Verbali dei Consigli di Presidenza; 4) Resoconto delle attività IGF 2008-09 5) Resoconto delle attività TC-ESIS 2008-09; 6) Prossime attività IGF; 7) Calendario congressi internazionali ; 8) ESIS Procedures and Documents (www.esisweb.org) 9) Modulo di iscrizione IGF-ESIS. G.: Indirizzi dell’attività dell’Associazione nell’anno 2008-09 Per quanto riguarda le attività previste nel prossimo anno, il Presidente propone le date del 22, 23 e 24 giugno 2009 per lo svolgimento a Torino, presso il Castello del Valentino del prossimo Congresso Nazionale IGF XX. L’Assemblea dei Soci approva all’unanimità. Keywords: all’o.d.g; attività; che; committee; conference; consiglio; convegno; crack; dal; dei; del; della; esis; fracture; frattura; gruppo; igf; integrità; nel; non; notiziario; politecnico; presidente; prof; prossimo; punto; sessione; soci; sono; strutturale; torino; una
• Impact of earthquake’s epicenter distance to failure of the embankment – A seismic prediction by Namdar, Abdoullah; Mughieda, Omer; Bin Mohd Yasin, Ts Haji Azahar; Azhar, Falak (2023) - One of the earlier observed experimental outcomes concluded that the angle of crack propagation in the clay is related to the brittleness of the clay [1]. In this regard, to validate the results of XFEM in crack propagation, the numerical simulation results [5] agreed with the experimental outcome [1]. Keywords: ann; crack; data; displacement; distance; doi; earthquake; embankment; epicenter; igf; model; node; propagation; simulation; time
• Structural integrity analysis of the pre-stressed concrete dome of the Belgrade fair hall 1 by Jelić, Mirjana; Sedmak, Aleksandar; Folić, Boris; Sedmak, Simon; Aranđelović, Mihajlo; Folić, Radomir; Radu, Dorin (2023) - The following elements were used as support for the central circular cap: - Pre-stressed hollow concrete support ring with a trapezoid cross-section, with a diameter of 94 m. For load case 24, compressive force N was caused by permanent pre-stressing forces, i.e., it was determined after all design force losses due to pre-stressing had occurred, for all cables except the inclined ones in the rib of the supporting hoop. Keywords: columns; concrete; crack; doi; dome; engineering; fig; force; integrity; load; ring; sedmak; support
• An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures. by Nguyen, Van-Hau (2024) - As a result, structural health assessments are contingent upon quantifiable parameters such as crack width, orientation, and length. (9) mm 0.62 0.23 Table 1: Calculation of crack width for bridge abutment and box girder in Fig. Keywords: concrete; crack; cracking; design; differences; doi; eqn; fig; formation; reinforcement; shrinkage; steel; structures; temperature; temperature differences; width
• In-Plane Mixed-Mode Brittle Fracture Assessment of Harsin Marble Using HCSP Specimen by Salavati, Hadi; Moqadaszadeh, Zuhair; Rashidi Mogaddam, Morteza (2024) - Mixed mode fracture assessment of U-notched graphite Brazilian disk specimens by means of the local energy, Struct. Mixed mode brittle fracture in PMMA - An experimental study using SCB specimens, Mater. Keywords: crack; criterion; doi; fracture; hcsp; mode; specimen
• A nonlocal elasticity theory to model the static behaviour of edge-cracked nanobeams by Scorza, Daniela; Carpinteri, Andrea; Ronchei, Camilla; Zanichelli, Andrea; Luciano, Raimondo; Vantadori, Sabrina (2023) - 2 1 2 1 2 1 2 1 1 2 1 0 1 2 with L , , c c c M t v L v L L x t x,L dt L L IE       (6)  3 2 2 1 1 1 1 1 2 1 1 2 1 1 2 with L , , c Lc c M t v L v L L x x t ,L dt L L IE       (5)  Keywords: art; beam; crack; fatigue; fig; frattura; l l; silicon; strutturale
• Application of Machine Learning in Fracture Analysis of Edge Crack Semi-Infinite Elastic Plate by Hossein Moghtaderi, Saeed; Jedi, Alias; Ariffin, Ahmad Kamal; Thamburaja, Prakash (2024) - FEM SIF I II III IV ξ =1 ξ =0.1 ξ =0.05 ξ =0.01 0+ 1 1 1 1 0+ 0+ 0+ 0+ 1 1.15 1.70 1.90 3.42 0.80 2.52 3.57 7.98 2 1.30 2.30 3.06 5.85 1.13 3.57 5.05 11.28 3 1.46 3.00 4.19 8.00 1.38 4.37 6.18 13.82 4 1.61 3.60 5.02 10.70 1.59 5.05 7.14 15.96 5 1.76 4.45 6.05 13.11 1.78 5.64 7.98 17.84 6 1.91 5.10 7.28 15.40 1.95 6.18 8.74 19.54 7 2.07 5.80 8.10 18.10 2.11 6.67 9.44 21.11 8 2.22 6.50 9.10 20.00 2.26 7.14 10.09 22.56 9 2.38 7.43 10.35 22.30 2.39 7.57 10.70 23.94 10 2.52 8.10 11.30 25.30 2.52 7.98 11.28 25.23 Table 3: Numerical values of maximum normal stress in y-direction using FEM and SIF for different amounts of crack length. Beginning with the incorporation of relevant input variables such as crack length, simulation iterations, and maximum normal stress in the y-direction, the data is subjected to comprehensive data preprocessing techniques such as data modification, feature curation, and data normalization. Keywords: analysis; ann; crack; data; doi; fracture; frattura; igf; learning; length; maximum; model; simulation; stress; strutturale
• Effect of fiber orientation-based composite lamina on mitigation of stress intensity factor for a repaired plate: a finite element study: Repair of thin-walled structures by Shaikh, Abdul Aabid; Baig, Muneer; Hrairi, Meftah; Mohamed Ali, Jaffar Syed (2024) - Bonded composite repair technique offer benefits like ensuring minimal stress concentration effects during load transfer between the host structure and bonded patch, allowing customization of the material properties and design of the bonded patch for specific applications, and avoiding significant additional weight to the component with the use of composite repair patches. Modeling and validation of composite patch repair to cracked thick and thin metallic panels, Compos. Keywords: adhesive; composite; crack; doi; effect; fiber; model; patch; plate; repair; sif; stress; type
• Civil Structural Health Monitoring and Machine Learning: A Comprehensive Review by Anjum, Asraar; Hrairi, Meftah; Aabid, Abdul; Yatim, Norfazrina; Ali, Maisarah (2024) - In recent studies, deep learning algorithms have become popular in many engineering applications, and this has been utilized in civil concrete structures in recent years But, in this study, we have M A. Anjum et alii, Frattura ed Integrità Strutturale, 69 (2024) 43-59; DOI: 10.3221/IGF-ESIS.69.04 51 elaborated on some of the primary challenges in ML algorithms that are needed for civil engineering concrete structures. Keywords: algorithms; anjum; approach; bridge; concrete; crack; damage; data; detection; doi; engineering; health; learning; machine; machine learning; model; monitoring; prediction; review; shm; structures; techniques
• Modelling of crack propagation in miniaturized and normal SENB specimens based on local failure criterion by Spisak, Bernadett; Bézi, Zoltán; Erdei, Réka; Szávai, Szabolcs (2024) - 16 shows the evaluation results of 2D normal SENB specimen simulations according to ASTM E1820-20. Figure 12: Fracture surface (left) and force-COD diagram (right) of normal SENB test specimens. Keywords: crack; doi; fracture; gtn; material; mini; model; parameters; results; senb; senb specimens; simulation; specimens; test; toughness; void
• Phenomenon of ignition and explosion of high-entropy alloys of systems Ti-Zr-Hf-Ni-Cu, Ti-Zr-Hf-Ni-Cu-Co under quasi-static compression by Zatsarna, Oleksandra; Kotrechko, Sergiy; Filatov, Oleksandr; Bondarchuk, Vadim; Firstov, Georgiy; Dubinko, Vladimir (2024) - Thus, the ability to ignite ZrW alloy particles, which size doesn’t exceed 100–200 μm, was experimentally shown [13]. This agrees well with the kinetics of ignition and combustion of ZrW alloy particles, which was studied in [13,14]. Keywords: alloys; crack; doi; energy; entropy; failure; fracture; ignition; metal; shear; temperature; tip
• Experimental investigation on the fatigue and fracture properties of a fine pearlitic rail steel by Leonetti, Davide; Schotsman, Bart (2024) - Influence of microstructure on fatigue behavior and surface fatigue crack growth of fully pearlitic steels. 3(b) and 3(c) show a comparison with the results of fatigue crack growth rate tests conducted in other studies on pearlitic steels for R = 0.1 and R = 0.5, respectively, like [23, 23, 27]. Keywords: crack; doi; fatigue; fig; fracture; growth; load; r350ht; rail; rate; specimen; steel; stress; surface; tests
• Improving the performance of damage repair in thin-walled structures with analytical data and machine learning algorithms by Shaikh, Abdul Aabid; Raheman, Md Abdul; Hrairi, Meftah; Baig, Muneer (2024) - Optimization of composite patch repair for center-cracked rectangular plate using design of experiments method, Mater. Thus, the primary contribution of the current work is to identify the effectiveness of parameters to mitigate the SIF to enhance bonded composite repair performance through ML algorithms. Keywords: aabid; algorithms; composite; crack; data; doi; length; patch; plate; regression; repair; sif; values
• About Measuring the Stress Intensity Factor of Cracks in Curved, Brittle Shells by Cao, Siwen; Sipos, Andras A. (2024) - Then, the method is applied to the calculation of crack tip SIF on a hemispherical dome and compared with the theoretical solution. For a hemispherical shell, the result of dimensionless SIFs meets the results by Erdogan, F.’s for crack angles well between 30º to 60º. (3) Keywords: crack; displacement; doi; numerical; sif; specimens; stress; θ θ
• Degradation analysis of dynamic properties for plain concrete structures under mixed-mode fracture conditions via an improved cohesive crack approach by De Maio, Umberto; Gaetano, Daniele; Greco, Fabrizio; Luciano, Raimondo; Pranno, Andrea (2024) - This is evidenced by the diagonal coefficients of the MAC matrix (MACii), which increasingly diverge from unity as damage levels increase. We can note that, along the unloading paths corresponding to different damage levels in the softening branch, where the main crack is almost fully developed, distinct tangent stiffnesses can be observed. Keywords: behavior; concrete; conditions; crack; damage; doi; fig; fracture; frequencies; level; maio; modal; mode; monitoring; numerical; structures; strutturale; unloading; vibration
• Predicting Damage in Notched Functionally Graded Materials Plates through extended Finite Element Method based on computational simulations by Siguerdjidjene, Hakim; Houari, Amin; Madani, Kouider; Amroune, Salah; Mokhtari, Mohamed; Mohamad, Barhm; Ahmed, Chellil; Merah, Abdelkrim; Campilho, Raul (2024) - - In all cases, damage to FGM plates occurs at the notch, around which the structure becomes weakened, but at loading and crack propagation path levels depending on the notch size and volume fraction exponent, Following the conclusions drawn above, and by using the new geometric gradation approach in FGM structures, this work has provided new modelling that remains exploitable for more problems, such as predictions of crack propagation path and their velocity, as well as damage in elastic-plastic behaviour for any geometric shape of the structure and along any gradation direction, and thus it opens interesting directions for further research. In order to simulate the phenomenon of damage in FGM materials, several approaches have been proposed by researchers such as in the work of Asadpoure and Mohammad Keywords: analysis; crack; damage; doi; element; et al; fgm; gradation; materials; model; notch; plastic; plate; properties; stress; structure; strutturale
• ANSYS implementation of the phase field fracture approach by Kosov, Dmitry; Tumanov, Andrey; Shlyannikov, Valery (2024) - A comparison of phase field fracture fields as a function of applied force direction indicates that the deviation of the crack angle from  =0˚ to  =7˚ has sufficient effect on the damage fields or crack trajectory. Phase field fracture, Finite element analysis, Mixed mode fracture, Surface cracks, ANSYS. Keywords: conditions; crack; displacement; doi; element; energy; field; field fracture; fig; fracture; loading; material; mode; phase; phase field; plate; specimen; strain; surface; tension
• Self-similarity of damage-failure transition and the power laws of fatigue crack advance by Bannikov, Mikhail; Oborin, Vladimir; Naimark, Oleg (2024) - Citation: Naimark, O., Oborin, V., Bannikov, M., Self-similarity of damage-failure transition and the power laws of fatigue crack advance, Frattura ed Integrità Strutturale, 70 (2024) 272-285. The “quasi-brittle” scenario with higher power exponent is characteristic for the final stage of fatigue crack advance or “initial material brittleness”, for instance, for ceramics. Keywords: advance; crack; crack advance; damage; defects; doi; energy; fatigue; fracture; kinetics; length; localization; paris; power; process; scaling; self; stress; zone
• Effect of temperature and adhesive defect on repaired structure using composite patch by Abdulla, Mohammed; Hrairi, Meftah; Shaikh, Abdul Aabid; Abdullah, Nur Azam (2024) - The fundamental principle behind composite patch repair lies in its ability to reinforce and restore the integrity of a damaged structure by strategically applying composite patches onto the affected areas. This study’s focus on square voids in specific locations within the adhesive layer is crucial in understanding how such localized defects can compromise the A M. Abdulla et alii, Fracture and Structural Integrity, 71 (2025) 124-150; DOI: 10.3221/IGF-ESIS.71.10 127 effectiveness of composite patch repairs, especially when considering factors such as moisture ingress and temperature variations that can exacerbate these defects. Keywords: adhesive; composite; crack; crack tip; defect; expansion; fracture; integrity; loading; material; patch; plate; repair; sif; stress; temperature; tip; values
• Integrated FEM-Multibody Co-Simulation of Additively Manufactured Hip Prosthesis containing cracks. by Gentile, Domenico; Di Bona, Roberto; Vanoli, Giuseppe Peter; testa, Gabriel; Ricci, Sara (2024) - Multi-mode fracture analysis for critical crack size and life estimation of hip prosthesis using extended finite element method, Journal of Mechanical Science and Technology, 37(2), pp. Fatigue crack growth behavior of Inconel 718 produced by selective laser melting, Frattura Ed Integrità Strutturale, 10(35), pp. Keywords: analysis; bona; case; crack; doi; figure; fracture; hip; igf; prosthesis; simulation; stress; value
• Stochastic Modeling of Structural Fatigue Damage in High Strength Steel Structures by Brozovsky, Jiri; Krejsa, Martin; Lehner, Petr; Parenica, Premysl; Seitl, Stanislav (2024) - The problem of steel element fatigue studied below was analyzed with the use of the procedure. DOProC based reliability analysis of structures. Keywords: crack; data; doi; doproc; fatigue; input; method; number; parallel; reliability; results; steel; time; use
• Phase-field modeling for investigating the effect of rebar positioning and uniform versus non-uniform corrosion on concrete fracture by Vu, Ba-Thanh; Nguyen, Dac-Duc; Tran, The-Truyen; Tran, Duc-Nhiem; Nguyen, Ngoc-Long; Bui, Tien-Thanh; Nguyen, Xuan-Lam (2025) - Both uniform corrosion and non-uniform corrosion conditions are applied in each example. Microsoft Word - numero_73_art_12_5278.docx B.T. Vu et alii, Frattura ed Integrità Strutturale, 73 (2025) 166-180; DOI: 10.3221/IGF-ESIS.73.12 166 Phase-field modeling for investigating the effect of rebar positioning and uniform versus non-uniform corrosion on concrete fracture Ba-Thanh Vu, Xuan-Lam Nguyen*, Dac-Duc Nguyen, The-Truyen Tran, Duc-Nhiem Tran, Ngoc-Long Nguyen, Tien-Thanh Bui Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam thanhvb@utc.edu.vn, nxlam@utc.edu.vn, ngdacduc@utc.edu.vn, tranthetruyen@utc.edu.vn, tdnhiem@utc.edu.vn, nguyenngoclong@utc.edu.vn, btthanh@utc.edu.vn KEYWORDS. Keywords: concrete; corrosion; cover; crack; cross; d10; development; displacement; expansion; fig; rust; type; uniform
• Investigation on the characterization and modelling of Fracture Process Zone behavior in Concrete Beams subjected to Three-Point Loading Tests by Vishwanatha, H. S.; Muralidhara, S.; Raghu Prasad, B. K. (2025) - This pronounced size dependence of FPZ length is attributed to the reduction in stress gradient with increasing beam size. However, when considering the relative or normalized fracture process zone length, i.e., the ratio of FPZ length to the ligament length above the notch,   FPZl D a0    , an opposite trend is observed. Keywords: aggregate; beam; concrete; crack; doi; fpz; fracture; integrity; length; load; size
• Effect of contact geometry, loading, material properties and relative slip on the fretting fatigue behaviour of metallic components by Zanichelli, Andrea; Carpinteri, Andrea; Ronchei, Camilla; Scorza, Daniela (2025) - T A. Zanichelli et alii, Fracture and Structural Integrity, 72 (2025) 225-235; DOI: 10.3221/IGF-ESIS.72.16 232 Figure 2: Fretting fatigue life as a function of: (a) the constant normal load, P; (b) the amplitude of the cyclic tangential load, Qa (by changing the ratio Qa/P); and (c) the amplitude of the cyclic axial stress, B,a. Figure 3: Crack nucleation orientation, , as a function of the amplitude of the cyclic axial stress, B,a. On the effect of contact geometry on fretting fatigue life under cyclic contact loading, Tribol. Keywords: amplitude; contact; crack; doi; fatigue; fatigue life; fretting; life; load; methodology; nucleation; orientation; stress; value
• Parametric study on the effect of anchor’s geometry on the stress distribution and crack initiation direction in a concrete body by Malikova, Lucie; Miarka, Petr (2025) - Steel anchors, Concrete cone failure, Finite element method, Maximum tangential stress, Critical distance. Both materials (steel and concrete) were modelled through the linear elastic material model considering the Young’s modulus of 210 GPa and 23.5 GPa and Poissson’s ratio 0.3 and 0.2 for steel anchor and concrete, respectively. Keywords: anchor; concrete; cone; crack; doi; failure; fracture; steel; stress
• A study on the crack presence effect on dynamical behavior of higher-order Quasi-3D composite steel-polymer concrete box section beams via DQFEM by Laouche, Nassim; Saimi, Ahmed; Bensaid, Ismail; Dahmane, Mouloud; Ait Atmane, Hassen (2025) - Boundary conditions profoundly influenced outcomes: C-F beams displayed asymmetric behavior, with catastrophic sensitivity to steel cracks near the clamped end, while C-C beams resisted buckling degradation until critical composite crack depths ( ac >0.5), beyond which nonlinear collapse occurred. For buckling, C-C beams with steel cracks exhibit clustered values across depths, suggesting limited depth dependency, while composite core cracks in C-C beams display nonlinear behavior: buckling remains stable up to a depth ratio of 0.5 before sharply declining, with spatial variations (e.g., midspan cracks induce the most severe degradation). Keywords: beam; composite; crack; steel; t e; t t;  
• Modeling of the transition from transgranular to intergranular fracture at elevated temperatures in EI698 nickel alloy by Tumanov, Andrey (2025) - The methods to introduce the dependence of critical energy release rate cG from temperature in phase field fracture models is discussed in [16–18]. Granular structure, Phase field fracture, Transgranular fracture, Intergranular fracture. Keywords: crack; doi; element; energy; field; fracture; grain; material; phase; plastic; rate; release; strain; temperature
• Prediction of crack length in thin-walled plates under different mode conditions using machine learning algorithms by Shaikh, Abdul Aabid (2025) - 10.3221/IGF-ESIS.75.06 59 Figure 2: ML process for crack length prediction. To quantitatively assess the performance of the ML algorithms developed for crack length prediction, four standard evaluation matrix were adopted: mean absolute error (MAE), root mean square error (RMSE), coefficient of determination (R² Score), and classification accuracy (%). Keywords: accuracy; crack; data; doi; fracture; iii; length; matrix; mode; noise; prediction; sif; stress; training
• J-integral evaluation and structural integrity assessment using FAD for SA 312 Type 304 LN steel welded pipes with notch under monotonic loading by V. Thondamon; A. Ramachandra Murthy; S. Vishnuvardhan (2025) - The evaluated assessment points were plotted on the FAD containing failure assessment lines constructed as per SINTAP procedure and BS 7910 standard 2A and 2B levels of assessment. The evaluated assessment points were plotted on the FAD containing failure assessment lines as per SINTAP procedure and BS 7910 Standard 2A and 2B level of assessment. Keywords: assessment; crack; fad; failure; fracture; initiation; integrity; load; method; moment; ratio; stress; toughness
• Numerical simulation of crack propagation in clinch joints by Lehner, Petr; Krejsa, Martin; Gřešica, Dominik; Flodr, Jakub (2025) - Fatigue cracks in Eurofer 97 steel: Part II. Microsoft Word - numero_75_art_02_5618.docx P. Lehner et alii, Fracture and Structural Integrity, 75 (2026) 13-20; DOI: 10.3221/IGF-ESIS.75.02 13 Numerical simulation of crack propagation in clinch joints Petr Lehner, Martin Krejsa, Dominik Gřešica, Jakub Flodr VSB – Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Czech Republic petr.lehner@vsb.cz, http://orcid.org/0000-0002-1478-5027 martin.krejsa@vsb.cz, https://orcid.org/0000-0003-0571-2616 dominik.grasica@vsb.cz, https://orcid.org/0009-0002-5115-5611 jakub.flodr@vsb.cz, https://orcid.org/0009-0003-7449-9473 KEYWORDS. Keywords: analysis; clinch; crack; doi; fatigue; joint; numerical; propagation; steel; stress; structures
• Experimental field analysis of damage-failure transition in composite material with a stress concentrator under cyclic loading (application of DIC and X-ray tomography techniques) by Bannikov, Mikhail; Bayandin, Yuriy; Nikityuk, Aleksandr; Uvarov, Sergey; Naimark, Oleg (2025) - The processes of material damage are concentrated at the crack front, in the so-called process zone, which ensures crack propagation. Fatigue damage evolution in thick composite laminates: Combination of X-ray tomography, acoustic emission and digital image correlation, Composites Science and Technology, 183, 107815. Keywords: analysis; area; bannikov; composite; concentrator; crack; damage; dic; doi; failure; fig; fracture; integrity; loading; strain; stress
• A novel procedure for accurately measuring the Mode II fracture toughness of steel fiber reinforced self-compacting concrete by Hossam El-Din, Mennat-Allah; Moawad, Mohamed; Ahmad, Seleem; Reda, Ramy M. (2025) - While SCC retains the brittleness and crack propagation behavior typical of conventional concrete, embedding fibers within the matrix/concrete, named fiber reinforced concrete (FRC), has proven effective in enhancing the tensile and flexural performance, increasing toughness, and superior energy absorption of fiber reinforced self- compacting concrete (FRSCC) Steel fiber reinforced self-compacting concrete, Mode II fracture toughness, Through-thickness crack, Matrix crack, Fiber bridging effect. Keywords: concrete; crack; fiber; fracture; kiic; mode; scc; specimens; toughness; ttc
• Consecutive shock waves and fatigue loads: action invariants as optimization parameters under Laser Shock Pinning by Bannikov, Mikhail; Naimark, Oleg; Balakhnin, Aleksandr; Oborin, Vladimir; Uvarov, Sergey; Yurina, Aleksandra (2025) - The study of these mechanisms seems important for understanding the role of collective effects in the ensemble of defects responsible for plastic deformation of solids, as well as the influence of shock wave treatment on strength and fatigue properties. Dislocation dynamics and dispersion due to the scattering in O. Neimark et alii, Fracture and Structural Integrity, 75 (20YY) 250-264; DOI: 10.3221/IGF-ESIS.75.18 253 heterogeneous media have played a central role in explaining this invariance as a mechanism of shock wave failure via collective adiabatic shears. Keywords: action; crack; damage; doi; fatigue; fatigue crack; fracture; invariant; laser; loading; material; plastic; power; self; shock; shock wave; stress; treatment; wave; wave loading
• Experimental and 3D numerical analysis on the effect of specimen thickness on fracture toughness of Al6061-SiC-cenosphere Hybrid composites by Ashoka, E.; Manjunatha, T.H.; Naveen Kumar, H. S.; Lingaraju, S. V.; Ravikumar, H. N. (2025) - Microsoft Word - numero_75_art_19_5652.docx E. Ashoka et alii, Frattura ed Integrità Strutturale, 75 (2026) 265-280; DOI: 10.3221/IGF-ESIS.75.19 265 Experimental and 3D numerical analysis on the effect of specimen thickness on fracture toughness of Al6061-SiC-cenosphere hybrid composites E. Ashoka Department of Mechanical Engineering, Bapuji Institute of Engineering and Technology, Davangere, India. https://orcid.org/0009-0000-4327-9134 Citation: Ashoka, E., Manjunatha, T. H., Naveen Kumar, H. S., Lingaraju, S. V., Ravikumar, H. N. Experimental and 3D numerical analysis on the effect of specimen thickness on fracture toughness of Al6061- SiC-cenosphere hybrid composites, Fracture and Structural Integrity, 75 (2026) 265-280. Keywords: al6061; cenosphere; composite; crack; doi; fig; fracture; sic; specimen; stress; thickness; toughness
• Reduction of Cracks in Concrete Slabs by Incorporating Synthetic Polypropylene Fiber by Ramos, Max; Parillo, Edwin (2025) - Regarding crack length, no significant differences were found on any of the days evaluated, suggesting that the polypropylene synthetic fiber may have a greater influence on reducing crack width than on crack length. CONCLUSIONS egarding crack width reduction, designs DM-01 (500 g/m³) and DM-02 (1000 g/m³) proved effective, with reductions of 11.32% and 18.41%, respectively. Keywords: concrete; crack; days; design; dm-03; doi; fiber; figure; hours; integrity; length; polypropylene; reduction; sample; width
• Utilizing cylindrical and cubical specimens with edge notch to determine size-independent fracture quantities of rock materials by Ince, Ragip; Eren, Erkin (2025) - Subsequently, they conducted bending fracture tests on SNDB specimens, SCB specimens, and cracked chevron- notched Brazilian disks composed of andesite and marble to comparatively determine mode I fracture toughness. In another study, Tutluoglu and co-workers [16] performed extensive experiments on andesite using SNDB specimens, SCB specimens, and three-point bending plates. Keywords: concrete; crack; doi; fig; fracture; ince; load; materials; method; notch; peak; sncb; sndb; specimens; test; values
• The theory of critical distances applied to problems in fracture andfatigue of bone by Taylor, David; Kasiri, Saeid; Brazel, Emma (2013) - Larger holes do require filling, but here we predict that the material needed can have an Eo value which is considerably smaller than that of normal bone: this finding is original and potentially of great value to researchers and manufacturers who are developing new types of bone graft materials. Artificial bone graft materials are designed to provide a scaffold for the rapid ingrowth of bone, and recently there has been much interest in the use of tissue engineering techniques for the development of these materials. Keywords: bone; crack; failure; fatigue; fracture; materials; stress; tcd; value
• On the influence of T-Stress on photoelastic analysis under pure mode II loading by Zakeri, Mahnaz; Colombo, Chiara (2013) - Based on the analytical studies, presence of the T-stress in mode II cracks transforms the isochromatic fringe patterns from symmetric closed loops to asymmetric and discontinuous shapes. In this paper, presence of the T-stress in mode II cracks and its effects on the fringe patterns is experimentally investigated. Keywords: crack; fig; fringe; mode; results; sin; stress; tip; ⎛ ⎞; ⎜ ⎟; ⎞ ⎛; ⎟ ⎜
• A dimensional analysis approach to fatigue in quasi-brittle materials by Paggi, Marco (2013) - h K d                  (9) where  is a dimensionless function. R N K K K K K K                              (2) where i ( 1, , Keywords: concrete; crack; dimensionless; fatigue; law; paris; self; similarity; size
• Complexity: a new paradigm for fracture mechanics by Carpinteri, A.; Puzzi, S. (2013) - Without entering the details, recent developments in fragmentaron theories (Carpinteri & Pugno [38,39]) have shown that the energy dissipation E during microcrack propagation occurs in a fractal domain comprised between a surface and the T http://dx.medra.org/10.3221/IGF-ESIS.10.01&auth=true http://www.gruppofrattura.it A. Carpinteri et alii, Frattura ed Integrità Strutturale, 10 (2009) 3-11; DOI: 10.3221/IGF-ESIS.10.01 8 specimen volume V. Experiments carried out by Carpinteri et al. Keywords: carpinteri; complexity; concrete; crack; energy; fig; fractal; fracture; material; mech; model; period; pugno
• Numerical experiments in 2D variational fracture by Angelillo, M.; Fortunato, A.; Babilio, E.; Lippiello, M.; Cardamone, L. (2013) - Figure 12: Elastic energy for increasing values of U. Curve: exact elastic energy.  Crack path selection: Griffith’s model is restricted to the study of crack propagation along a given path. Keywords: angelillo; crack; energy; fig; figure; fracture; kinking; mesh; propagation
• Ductile cast irons: microstructure influence on fatigue crack propagation resistance by Iacoviello, Francesco; Di Cocco, Vittorio; Cavallini, Mauro (2013) - Figure 21: Pearlitic DCI (R = 0.1,K = 13 MPa√m). Figure 22: Pearlitic DCI (R = 0.1,K = 15 MPa√m). Keywords: crack; dci; fatigue; ferritic; figure; graphite; mpa√m; nodules; pearlitic
• Investigation of crack propagation in single optical fiber composite with thermal influence by finite element method by Mohammad, Ahanchian; Hovhannes, Arzumanyan; Sergey, Verlinski (2013) - (a) (b) (c) Figure 2: Contour plots for maximum crack length (critical length), solved by MathCAD, (a) Von Misses stress distribution subject to critical loading, (b)Von Misses stress distribution subject to critical loading and thermal conditions, (c) Approximation of crack propagation subject to critical loading. The effects of crack length, temperature and mechanical forces are investigated by Finite Element Method in the cracked body. Keywords: crack; fiber; fracture; loading; method; model; stress
• The interface between metallurgy and mechanics in material performance by James, M. N.; Newby, M. (2013) - Their influe rostresses can e stress durin on-uniform pl k growth proc nfluenced by he componen ining 0.001C, 0 strength of 17 e within the rnal applicatio es, defects and dual stresses echniques, wh granular in sc ype III stresse , and from di e of residual the magnitud and the resid analysis outc in fracture m ncertainty ari ision in hole ontinuum, an o introduced a our necessitat Three dime tic (which re fundamentall M. N. James e metallu e University of Ply lson Mandela University of Ply osherville, Joha mportant top many aspect tures must, uum aspects uum reality o material and gn have to nfluences ha ing, or corro nents, or wh e study exam rformance o non-continu chanical engin uctures and m external load ncing our abil The key a nd considerab as the applied ted by a mov ensional stres esist plastic d ly controlled et alii, Frattura e urgy and lymouth, Plym Metropolitan lymouth, Plym annesburg, Sou pic, and one ts of the ser of necessi s of applied of material s d environme be merged ave a key ro osion), where here tribology mples drawn of materials. Keywords: alii; crack; doi; field; frattura; http://dx.medra.org/10.3221/igf-esis.14.01&auth=true; http://www.gruppofrattura.it; james; pla; steel; stress; tip; weld
• Analysis of crack-tip plastic zone in a Compact Tensile Shear (CTS) Specimen by Sharanaprabhu, C.M.; Kudari, S.K. (2013) - 16 s under mode- m plastic zone one radius un investigation ode loading f lso studied. e FEA for cr EFM conditi oing for exten B V B Colleg s, 24 (2001) 7 cience, 38 (20 er M. Korsun Forschungsh 18. (2010) 13. Keywords: angle; crack; fig; figure; finite; keff; loading; mode; mpzr; plastic; results; tip; zone
• Numerical study of fracture arrest on snow cover by Chiaia, B. M.; Frigo, B. (2013) - wn fracture pr e fracture g ing position o different geo to : 2m x 5m k overpasses t k length in th tifies a tempo ous crack arre ntinuous al crack arres the presence ical displacem . An initi in the simula me of snowpac propagation on e slab without rotates slight e propagation afterwards to sters in the sn e linear crack ar crack arres the effects of alysing the pl 3). Keywords: adobe; area; arrest; chiaia; crack; energy; fracture; layer; mode; propagation; slab; snow

• Densità di energia di deformazione locale e resistenza a fatica di giunti saldati di geometria complessa by Zappalorto, M.; Berto, F.; Lazzarin, P. (2013) - Per riconvertire i dati sperimentali in termini energetici la densità di energia di deformazione è sempre stata valutata su un volume di controllo che abbraccia le zone di inne- sco delle cricche di fatica indicate dagli autori nei lavori originali. Resistenza a fatica di giunti saldati in acciaio strutturale di geometria complessa in termini di densità di energia locale; Keywords: banda; con; cordoni; dati; dei; del; della; densità; energia; fatica; fatigue; fig; giunti; piede; resistenza; saldati; sono
• On the overall accuracy of the Modified Wöhler Curve Method in estimating high-cycle multiaxial fatigue strength by Susmel, Luca (2013) - From a physical point of view, the meaning of mean stress sensitivity index m can be explained by taking full advantage of the outcomes summarised by Kaufman and Topper in Ref. In fact, independently from the complexity of the time-variable stress state damaging the material point at which the stress analysis is performed, there always exist two or more material planes experiencing the maximum shear stress amplitude, so that, amongst all the potential critical planes, the one which has to be used to calculate mean stress sensitivity index m as well as to perform the fatigue assessment is the plane experiencing the largest value of the maximum normal stress. Keywords: engineering; fatigue; journal; loading; materials; mean; mwcm; plane; steel; stress; susmel
• Analysis of the fatigue strength under two load levels of a stainless steel based on energy dissipation by Atzori, B.; Meneghetti, G.; Ricotta, M. (2013) - To investigate the material fatigue behaviour, constant amplitude fatigue tests were carried out up to the specimen failure. 1.E+08 Q [ kJ /( m 3 cy cl e) ] N. cycles R=-1 k=2.25 QA,50%=87 kJ/(m 3 cycle) TQ=1.92 TN,Q=4.34 10% 90% 50% broken run-out broken stair case procedure 300 200 104 105 106 107 108 N. cycles  a [ M P a] 10% 90% 140 Open symbols: first block of cycles Filled symbols: second block of cycles First load level: a=230 MPa Second load level: a=190 MPa specimen 1 specimen 2 specimen 3 specimen 4 10 100 1000 10000 specimen 1 specimen 2 specimen 3 specimen 4 N. cycles Q value measured at constant amplitude stress  a = 190 MPa on undamaged specimens Open symbols: first block of cycles Filled symbols: second block of cycles First load level:  a =230 MPa Second load level:  a =190 MPa Q [ kJ /( m 3 c yc le ) 104 105 106 107 108 W http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.17.02&auth=true B. Atzori et alii, Frattura ed Integrità Strutturale, 17 (2011) 15-22; DOI: 10.3221/IGF-ESIS.17.02 21 block of cycles were definitely higher than those observed during constant amplitude fatigue tests at the same stress level on the undamaged material. Keywords: amplitude; cycles; fatigue; level; load; material; specimen; tests
• Fatigue characterization of mechanical components in service by Fargione, G.; Tringale, D.; Guglielmino, E.; Risitano, G. (2013) - Considering the limited number of the specimens at our disposal for each type of component (flange tie rods), the analysis has been done detecting the temperatures of the stressed specimens surface. Therefore there were four tie rods specimens for A and four tie rods specimens for B. T http://dx.medra.org/10.3221/IGF-ESIS.26.14&auth=true http://www.gruppofrattura.it G. Fargione et alii, Frattura ed Integrità Strutturale, 26 (2013) 143-155; DOI: 10.3221/IGF-ESIS.26.14 146 Figure 2: Clear-cut breakages of tie rods. Keywords: analysis; fatigue; material; risitano; rods; specimen; stress; temperature; tie
• A review of thermographic techniques for damage investigation in composites by Vergani, Laura; Colombo, Chiara; Libonati, Flavia (2013) - In our previous work, this stress value was defined as damage stress, σD [17-19]. Damage stress is the average value among those obtained from the different thermographic methods, except for E-glass/epoxy Keywords: composites; damage; fatigue; load; materials; region; specimens; stress; surface; temperature; tests
• The application of the infrared thermography on titanium alloy for studying fatigue behavior by Hou, P.; Fan, J.; Guo, Q.; Guo, X. (2013) - The measurement of the thermal signals makes it possible to visibly detect the appearance of fatigue damage and to predict the fatigue parameters of materials. Figure 5: Fatigue limit stress by the infrared thermographic method. Keywords: damage; fatigue; infrared; limit; method; stress; temperature
• Fatigue behaviour of titanium dental endosseous implants by Felli, Ferdinando; Pilone, Daniela; Scicutelli, Alessandro (2013) - CONCLUSIONS wo dental implants are tested against fatigue by using different loading schemes. After the experiments performed with the bore cylinder type, which demonstrated a similarity of failure mode between retrieved and tested implants, another kind of dental prosthetic implant has been tested. Keywords: failure; fatigue; figure; fracture; frattura; implant; loading; screw; stress; surface; tests; titanium; type
• A method for calculation of finite fatigue life under multiaxial loading in high-cycle domain by Malnati, M. (2014) - Nevertheless, differently from [3] a notion of stress cycle is used here, even though the cycles are not counted and extracted from the global sequence - as it is done in a rainflow method (see e.g. [1]) - but they are simply created and updated in a continuous way while the stress history advances. Figure 2: Created stress cycles when the stress point is moving between states ‘5’ and ‘6’. Keywords: cycles; fatigue; point; stress; surfaces; yield
• Fatigue behavior of lubricated Ni-Ti endodontic rotary instruments by Brotzu, A.; Felli, F.; Lupi, C.; Vendittozzi, C.; Fantini, E. (2014) - The use of rotary instruments with greater taper allows to get perfectly conical channels, easily sealable, thus reducing the risk of recurrence. The insertion of rotary instrument must be as parallel as possible to the canal entrance and the operator has to be particularly accurate inserting and maintaining the tool in the root canal with regular up and down movement, necessary in order to avoid the seizing of the instruments inside the simulator . Keywords: canal; failure; fatigue; figure; gel; instruments; load; lubricant; root; rotary; test
• Fracture Mechanics: Inspirations from Nature by Taylor, David (2014) - I have investigated in some detail the Theory of Critical Distances as applied to engineering materials (see for example [2]). This is reflected in the smaller fatigue range for leg material, with an endurance limit at one million cycles around 70% of the failure stress, in contrast to the wing material which shows fatigue at less than 50% of its tensile strength. Keywords: engineering; failure; fatigue; fracture; materials
• A probabilistic interpretation of the Miner number for fatigue life prediction by Fernández-Canteli, A.; Blasón, S.; Correia, J.A.F.O.; de Jesus, A.M.P. (2014) - Cumulative damage; Miner number; Statistical interpretation. MINER AS ALLEGED LINEAR CUMULATIVE DAMAGE HYPOTHESIS he Miner number is generally accepted as representing a stage of damage resulting from a “linear” progression of damage accumulation. Keywords: canteli; failure; fatigue; holmen; miner; miner number; number; stress
• Modification of creep and low cycle fatigue behaviour induced by welding by Carofalo, A.; Dattoma, V.; Nobile, R.; Panella, F.W.; Alfeo, G.; Scialpi, A.; Zanon, G.P. (2014) - In most cases, fatigue tests have been carried out with applied strain range Δε ≤ 0.6%. The low level of the applied strain in a large number of fatigue tests constituted a limitation in order to utilize damage models for fatigue life prediction. Keywords: base; creep; cycle; fatigue; material; range; strain; stress; temperature; test
• Failure of cargo aileron’s actuator by Zucca, G.; Amura, M.; Allegrucci, L.; Bernabei, M. (2014) - A Microstructural examination, were performed on two sections of actuator case made orthogonally and parallel to its axis. he examination of fracture surface showed a multisite fatigue phenomenon started from the external edge of actuator case. Keywords: actuator; cap; case; fatigue; fig; figure; fracture
• Duplex S-N fatigue curves: statistical distribution of the transition fatigue life by Paolino, D.S.; Tridello, A.; Geng, H.S.; Chiandussi, G.; Rossetto, M. (2014) - The paper shows results obtained in case of a Duplex S-N curve with fatigue limit. statistical model In case of Duplex S-N curve with fatigue limit, the cumulative distribution function (cdf) of the fatigue life Y (i.e., logarithm of the number of cycles to failure) can be expressed as [8]:  1 t l tY X X XY surf Y intF F F F F F   (1) where Y surfF is the cdf of the fatigue life if crack nucleates superficially (i.e., of the random variable (rv) ) Keywords: distribution; fatigue; transition
• Definition of the linearity loss of the surface temperature in static tensile tests by Risitano, A.; Fargione, G.; Guglielmino, E. (2014) - [1] Locati, L., An aid for the determination of fatigue limit in research and production, Metall. [21] Curà, F., Curti, G., Sesana, R., A new iteration method for the thermographic determination of fatigue limit in steels, Int. Keywords: analysis; fatigue; function; limit; point; risitano; specimen; stress; temperature; time
• On the notch sensitivity of cast iron under multi-axial fatigue loading by Livieri, P.; Maggiolini, E.; Tovo, R. (2014) - [10] Susmel, L., Multiaxial notch fatigue from nominal to local stress-strain quantities., Cambridge, UK Woodhead & CRC; (2009). =1 53.3 53.3 152.1 141.9 Table 3: Effective stress values provided by the IG approach. Keywords: fatigue; loading; notch; parametric; strength; stress; tensile; values
• Investigation of very high cycle fatigue by thermographyc method by Crupi, V.; Epasto, G.; Guglielmino, E.; Risitano, G. (2014) - 4 shows the values of asymptotic temperature increment during fatigue test ΔTas (phase 2) as a function of the square of stress range applied Δσ2 for the two investigated steels: 115CrV3 and 60SPb20+Bi. Fracture surfaces of the investigated steel were observed after fatigue tests by SEM and stereomicroscope. Keywords: cycles; failure; fatigue; life; regime; steel; temperature; tests
• Field Load Acquisition and variable amplitude fatigue testing on maxi-scooter motorcycles by Petrone, N.; Saraceni, M. (2014) - (a) (b) Figure 5: Horizontal fatigue test bench (a) Sketch of the Horizontal Fatigue test bench. Figure 6: Vertical fatigue test bench. Keywords: bench; components; fatigue; field; fig; force; frame; petrone; procedure; scooter; strain; tests
• Interference fit effect on holed single plates loaded with tension-tension stresses by Croccolo, D.; De Agostinis, M.; Vincenzi, N. (2012) - However, a remarkable difference can be noticed between the two levels, I06 and I2: the higher is the interference level, the higher is the fatigue strength at the highest levels of remote stress. The diagrams of Fig. 7 are also useful to indicate the minimum interference level sufficient to improve the fatigue strength for a stated remote stress; for instance, in the case of 357.5±292.5MPa of remote stress an interference level of 0.6% is high enough for increasing the fatigue strength, whereas for 357.5±292.5MPa of remote stress an interference level of about 1% is suggested. Keywords: fatigue; fig; interference; point; specimens; stress
• Estimation of fretting fatigue life using a multiaxial stress-based critical distance methodology by Castro, F. C.; Araújo, J. A.; Pires, M. S. T.; Susmel, L. (2015) - Due to the similarities between notch and fretting fatigue, an attempt to estimate fretting fatigue thresholds using the TCD has been carried out by Araújo et al. Microsoft Word - numero_33_art_49 F. Castro et alii, Frattura ed Integrità Strutturale, 33 (2015) 444-450; DOI: 10.3221/IGF-ESIS.33.49 444 Focussed on multiaxial fatigue Estimation of fretting fatigue life using a multiaxial stress-based critical distance methodology F. C. Castro, J. A. Araújo, M. S. T. Pires Department of Engineering Mechanics, University of Brasilia fabiocastro@unb.br L. Susmel Department of Civil and Structural Engineering, The University of Sheffield l.susmel@sheffield.ac.uk ABSTRACT. Keywords: contact; distance; failure; fatigue; life; method; stress
• Equivalent configurations for notch and fretting fatigue by Araújo, J. A.; Castro, F. C.; Pommier, S.; Bellecave, J.; Mériaux, J. (2015) - Under the typical partial slip conditions under which fretting fatigue takes place, the amount of superficial damage is small. Positive results of such simulations can lead us to design an experimental program that can bring more firm conclusions on the use of pure stress-based approaches, which do not include the wear damage, in the modeling of fretting fatigue. Keywords: distance; fatigue; fretting; material; multiaxial; notch; stress
• Multiaxial fatigue of aluminium friction stir welded joints: preliminary results by Hattingh, D. G.; James, M. N.; Susmel, L.; Tovo, R. (2015) - The way the MWCM estimates fatigue lifetime under multiaxial fatigue loading is schematically shown via the modified Wöhler diagram sketched in Fig. By performing a systematic investigation based on numerous experimental results generated under multiaxial fatigue loading [12-14], it was observed that fatigue damage tends to increase as eff increases. Keywords: cycles; fatigue; joints; loading; mwcm; stir; stress; susmel; welding
• Time and frequency domain models for multiaxial fatigue life estimation under random loading by Carpinteri, Andrea; Spagnoli, Andrea; Ronchei, Camilla; Vantadori, Sabrina (2015) - Engineering structures and components are often subjected to random fatigue loading produced, for example, by wind turbulences, marine waves and vibrations. It consists of the following three steps: (i) definition of the critical plane; (ii) PSD evaluation of an equivalent normal stress; (iii) determination of fatigue life. Keywords: domain; fatigue; frequency; life; loading; psd; stress
• Fractography as a tool to assess the occurrence of fatigue fractures in complex microstructure structural components by Firrao, D.; Matteis, P. (2012) - [5] Rimane quindi a resistere davanti alla cricca di fatica in propagazione un pettine di lamelle di ferrite, che la cricca supererà una alla volta. Figura 10: Zona plastica di fronte all’apice della cricca di fatica propagantesi in una lega Keywords: alla; che; con; cricca; della; fatica; fatigue; ferrite; fig; firrao; frattura; lega; propagazione; striature; una; valori; zona
• Fretting in complete contacts - the use of Williams’ solution by Hills, D. A.; Flicek, R. (2015) - [1] Hills, D.A., Flicek, R.C., Dini, D., Sharp contact corners, fretting and cracks. Microsoft Word - numero_33_art_8 D. A. Hills et alii, Frattura ed Integrità Strutturale, 33 (2015) 61-66; DOI: 10.3221/IGF-ESIS.33.08 61 Focussed on characterization of crack tip fields Fretting in complete contacts - the use of Williams’ solution D. A. Hills, R. Flicek University of Oxford, UK david.hills@eng.ox.ac.uk, robert.flicek@eng.ox.ac.uk ABSTRACT. Keywords: contact; corner; fatigue; hills; slip; test
• Gradient-enriched linear-elastic tip stresses to perform the highcycle fatigue assessment of notched plain concrete by Bagni, C.; Askes, H.; Susmel, L. (2015) - To conclude, it is worth observing that the determined endurance limits were estimated in terms of 0,MAX and MAX because, under either cyclic axial loading or bending, the maximum stress in the cycle is seen to be a stress quantity capable of efficiently taking into account the mean stress effect in concrete fatigue As done when estimating the TCD critical distance L (Fig. 3), these curves were determined, by using an in-house FE code, under the maximum loading in the cycle to model the mean stress effect in concrete fatigue [15]. Keywords: batch; concrete; distance; fatigue; linear; mpa; stress
• Synchrotron 3D characterization of arrested fatigue cracks initiated from small tilted notches in steel by Lorenzino, P.; Buffiere, J.-Y.; Okazaki, S.; Matsunaga, H.; Murakami, Y.; Matsunaga, H. (2015) - EXPERIMENTAL Specimens n order to perform the X-ray analysis of non-propagating fatigue cracks, a smaller specimen with a square cross- section ranging from 0.8 to 1 mm2 was cut from the larger sample, such that it contained the notch and the non- propagating fatigue crack. High resolution synchrotron X-ray tomography has been used to obtain 3D images of those small defects and non-propagating cracks (NPC). Keywords: area; cracks; fatigue; length
• Numerical measures of the degree of non-proportionality of multiaxial fatigue loadings by Bolchoun, A.; Kaufmann, H.; Sonsino, C. M. (2015) - cos sin 2 2 2 I II I II I II I II I II I II t t S t t                              A tensor of this shape results in unchanging principal values , I II  , but constantly rotating principle directions (Fig. 4). A number of measures of this kind (or non-proportionality factors) were proposed in the literature and are discussed here: - the factor used in EESH is a quotient of stress amplitudes integrals, - the factor according to Gaier, which works with a discrete stress tensor values in a scaled stress space, - the factor according to Kanazawa, which makes use of plane-based stress values, - the factor used in MWCM, which exploits stress values in the plane with the highest shear stress amplitude, a new non-proportionality factor, which is based on the correlation between individual stress tensor components, is proposed. Keywords: factor; fatigue; non; plane; proportionality; stress; tensor
• Evaluation and visualization of multiaxial stress and strain states under non-proportional loading by Itoh, T.; Sakane, M.; Morishita, T. (2015) - This paper presents a simple method of determining stresses and strains and a severity of loading history under non-proportional loadings with defining the rotation angles of the maximum principal stress and strain in a three dimensional stress and strain space. Fatigue; Low cycle fatigue; Multiaxial loading; Non-proportional loading; Stress and strain evaluation; Random loading; Visualization of multiaxial loading. Keywords: fatigue; loading; non; principal; strain; stress; t t;  
• L’applicazione della diffrattometria dei raggi X per l’analisi del cedimento dei componenti meccanici by Guagliano, Mario (2013) - E’ immediato dedurre che sussiste una relazione lineare tra εφΨ e sen2Ψ e che σφ è la pendenza della retta divisa per (1+υ)/E. Ciò significa che è possibile determinare il valore di σφ eseguendo più misure con differenti angoli di incidenza Ψ. Questa è la procedura più comunemente e- seguita per la misura degli sforzi residui con la XRD. Variando l’angolo ψ di incidenza tra il fascio di raggi X e la superficie oggetto della misura, si interessano alla mi- sura differenti grani cristallini. Keywords: alla; che; con; cricca; degli; dei; della; diffrazione; fatigue; fig; frattura; fwhm; gomiti; misure; profondità; provini; raggi; ray; residui; risultati; sforzi; sono; superficie; tra; una; xrd
• Estimation of fatigue life of selected construction materials under cyclic loading by Kurek, M.; ?agoda, T.; Vantadori, S. (2015) - Literature of the subject provides a number of multiaxial fatigue criteria The paper also compares the calculation and experimental results for fatigue strength of specific materials, using multiaxial fatigue criteria and various methods for determining critical plane orientation that take into account the ratio of fatigue limits. Keywords: angle; criteria; fatigue; life; materials; plane; stress
• Random accumulated damage evaluation under multiaxial fatigue loading conditions by Anes, V.; Reis, L.; de Freitas, M. (2015) - [16] is a non-Rainflow approach to evaluate loading block damage and it is based on the SSF equivalent shear stress previously presented. In this paper, the SSF equivalent stress and the virtual cycle counting method are presented and discussed, regarding their physical foundations and their capability to characterize multiaxial fatigue damage under complex loading blocks. Keywords: block; cycle; damage; fatigue; fig; loading; shear; ssf; stress
• Critical plane approach to multiaxial variable amplitude fatigue loading by Wang, Yingyu; Susmel, Luca (2015) - By making the most of our previous experience [10, 16-18], now we intend to use the stain-based MVM in conjunction with MMCCM to predict fatigue lifetime under VA multiaxial fatigue loading. Finally, from such spectrum fatigue strength under VA multiaxial fatigue loading can be predicted according to Palmgren-Miner’s rule (Fig. 3i). Keywords: fatigue; plane; t t;  ;  ;  ;  
• Design and realization of a multisamples rotating high cycle fatigue machine by Gentile, Domenico; Martorelli, Massimo (2012) - Microsoft Word - numero 22 articolo 9.doc D. Gentile et alii, Frattura ed Integrità Strutturale, 22 (2012) 85-92; DOI: 10.3221/IGF-ESIS.22.09 85 Design and realization of a multisamples rotating high cycle fatigue machine Domenico Gentile DICeM – University of Cassino – via G. Di Biasio, 43 – 03043 Cassino, Italy Massimo Martorelli DiME – University of Naples Federico II – School of Engineering, P.le V. Tecchio 80 - 80125 Naples, Italy massimo.martorelli@unina.it ABSTRACT. In this work the design and the technical characteristic of a Moore rotating bending machine are presented. Keywords: bending; design; fatigue; load; machine; order
• Models of initiation fatigue crack paths proposed by Macha by Marciniak, Z.; Rozumek, D. (2015) - When applying energy fatigue criteria to assess life, energy characteristics are used, developed as a result of the Coffin- Manson-Basquin characteristic multiplication [22-24] by stress amplitude determined for specimen half-life. [12] Marciniak, Z., Rozumek, D., Macha, E., Verification of fatigue critical plane position according to variance and damage accumulation methods under multiaxial loading, Int. Keywords: energy; fatigue; macha; plane; strain; stress
• Life estimation by varying the critical plane orientation in the modified Carpinteri-Spagnoli criterion by Ronchei, Camilla; Carpinteri, Andrea; Fortese, Giovanni; Spagnoli, Andrea; Vantadori, Sabrina; Kurek, Marta; ?agoda, Tadeusz (2015) - [3] Susmel, L., Lazzarin, P., A stress-based method to predict lifetime under multiaxial fatigue loadings, Fatigue Fract. [8] Karolczuk, A., Macha, E., A review of critical plane orientations in multiaxial fatigue failure criteria of metallic materials, Int. Keywords: criterion; doi; fatigue; plane; stress
• Static and dynamic experimental study of strengthened inforced short concrete corbel by using carbon fabrics, crack path in shear zone by Ivanova, I.; Assih, J. (2015) - The results show also that, the effect of fatigue on reinforced concrete short brackets, in a substantially lower tensile strength to 10 % relative to reinforced concrete short corbel load under monotone static test. The results of this investigation showed that strengthened reinforced concrete corbel bonded by carbon fiber fabrics can improve the ultimate load to twice and stiffens less than a third. Keywords: carbon; concrete; corbel; fabrics; fatigue; fiber; load; test
• Critical crack path assessments in failure investigations by Caligiuri, Robert D. (2015) - Figure 4: Montage from NTSB Final Report (Fig. 21) that highlights approximate ductile tear (yellow) and fatigue crack growth (green). Burst pressure is the internal pressure at which pipe rupture occurs. Keywords: ductile; fatigue; pipe; pressure; pup; rupture; segment; tear
• High temperature fatigue tests and crack growth in 40CrMoV13.9 notched components by Gallo, P.; Berto, F. (2015) - High temperature fatigue; Cracks growth; 40CrMoV13.9; Strain energy density; Surface roughness. Other authors have recently extended linear elastic approaches to assess high temperature fatigue, such as Louks and Susmel [10] that investigated the accuracy of the linear-elastic Theory of Critical Distances (TCD) in estimating high-cycle fatigue strength of notched metallic materials, experiencing elevated temperatures during in-service operations with very sound results. Keywords: data; fatigue; notched; roughness; specimens; surface; temperature; tests
• Functional fatigue of NiTi Shape Memory wires for a range of end loadings and constraints by Mammano, G. Scirè; Dragoni, E. (2012) - Also in this test, the heating of the wire was provided by a sinusoidal current oscillating from zero to a peak value capable of producing the full transformation of the alloy under the cooling conditions adopted. RESULTS AND DISCUSSION he data of applied stress () and cycles to failure (Nf) obtained from the test campaign under constant stress (circles) and constant stress with limited maximum strain (triangles and diamonds for limit strains of 3% and 4%, respectively) are plotted in the semi-log Woehler diagram of Fig. 3 together with the bilinear interpolation (solid line for constant stress, dotted and dashed lines for limit strains of 3% and 4%, respectively). Keywords: fatigue; fig; linear; maximum; strain; stress; stress test; test; wire
• Influence of control parameters on the crack paths in the aluminum alloy 2024 under bending by Marcisz, E.; Rozumek, D.; Marciniak, Z. (2015) - Tests with controlled energy parameter amplitude allow observing crack growth depending on maximum shearing stress surface. A sample development of crack paths at controlled energy parameter is shown in Fig. Keywords: amplitude; bending; energy; fatigue; fig; parameter
• Modelling of ultrasonic impact treatment (UIT) of welded joints and its effect on fatigue strength by Yuan, K.L.; Sumi, Y. (2015) - Slight over-estimation of UIT compressive residual stress on the surface K.L. Yuan et alii, Frattura ed Integrità Strutturale, 34 (2015) 476-486; DOI: 10.3221/IGF-ESIS.34.53 483 is seen, however, it has been found that the measured surface stress by X-ray method is very sensitive to the location of measurement spot [25]. Microsoft Word - numero_34_art_53 K.L. Yuan et alii, Frattura ed Integrità Strutturale, 34 (2015) 476-486; DOI: 10.3221/IGF-ESIS.34.53 476 Focussed on Crack Paths Modelling of ultrasonic impact treatment (UIT) of welded joints and its effect on fatigue strength K.L. Yuan, Y.Sumi Yokohama National University, Japan sumi@ynu.ac.jp ABSTRACT. Keywords: fatigue; impact; simulation; softening; strength; stress; surface; toe; treatment; uit; weld
• Biaxial fatigue behavior of a powder metallurgical TRIP steel by Ackermann, S.; Lippmann, T.; Kulawinski, D.; Henkel, S.; Biermann, H. (2015) - The results on fatigue crack behavior support the assumption that the period of stage I (mode II) crack propagation is much longer under shear loading than under other biaxial conditions due to absence of tensile stress normal to the planes of maximum shear strain under shear loading. [2] published observations of surface cracks in cruciform specimens after different biaxial low cycle fatigue loading conditions. Keywords: biaxial; cracks; fatigue; loading; shear; steel; strain; tests
• Damage and failure modeling of lotus-type porous material subjected to low-cycle fatigue by Kramberger, J.; Sterkuš, K.; Glodež, S. (2015) - Porous materials exhibit some unique features which are useful for a number of various applications. Porous materials; Low-cycle fatigue; Damage; Finite element analysis. Keywords: cycle; damage; fatigue; fig; lotus; material; model; pores; structure; type
• Fatigue cracking of aluminium alloy AlZn6Mg0.8Zr subjected to thermomechanical treatment by Kowalski, A.; Ozgowicz, W.; Kurek, M.; Kurek, A.; Lagoda, T. (2015) - This requires a constant development in the technology and improvement of the properties of aluminium alloys, resulting in a higher effectiveness in various applications. An essential problem of the technology of aluminium alloys is not only the formation of their mechanical properties, but also their formation by means of casting, plastic deformation, freeform fabrication or machining [1]. Keywords: alloy; aluminium; cracking; deformation; fatigue; particles; samples; strength; treatment
• Cracks path growth in turbine blades with TBC under thermo – mechanical cyclic loadings by Sadowski, T.; Golewski, P. (2015) - Microsoft Word - numero_35_art_55 T. Sadowski et alii, Frattura ed Integrità Strutturale, 35 (2016) 492-499; DOI: 10.3221/IGF-ESIS.35.55 492 Cracks path growth in turbine blades with TBC under thermo – mechanical cyclic loadings T. Sadowski, P. Golewski Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin sadowski.t@gmail.com ABSTRACT. Turbine blade; Thermal barrier coating; Finite element method. Keywords: blade; cycles; elements; engine; fatigue; fig; sadowski; tbc; temperature; turbine
• Experimental methods for the characterization of fatigue in microstructures by De Pasquale, G.; Somà, A. (2012) - Fatigue failure test results are usually presented in the literature in the traditional form of S-N curves; this requires a high number of failures (represented by a single point of the curve) to draw a single diagram. The curve labeled with Va = 0V represents the pull-in variation during the application of a series of consecutive static actuations without alternate fatigue loading. Keywords: cycles; design; device; failure; fatigue; loading; material; number; pull; specimen; stress; test; voltage
• Integrity and life estimation of turbine runner cover in a hydro power plant by Sedmak, A.; Bosnjak, S.; Arsic, M.; Sedmak, S.A.; Savic, Z. (2016) - Fatigue strength depends on number of cycles and can be evaluated by using logarithm curve, obtained from Weller’s curve:    1lg lgA B N For the cast steels with defects (material with reduced plasticity), the following equation for fatigue strength holds: lg -1 = 2.69 – 0.155· Keywords: cover; fatigue; strength; turbine
• Plastic flow equations for the local strain approach in the multiaxial case by Madrigal, C.; Navarro, A.; Vallellano, C. (2016) - Everything is built upon the idea of distance between stress points. We have found that the definition of distance, or rather separation, between stress points after load reversals, from the point of view of plasticity, must involve the angle formed by the lines joining the current stress point and the point of load reversal and this with the origin. Keywords: case; cyclic; fatigue; hardening; plastic; point; strain; stress; vector
• Deformation and fatigue behaviors of carburized automotive gear steel and predictions by Jo, Bonglae; Shim, Yongbo; Sharifimehr, Shahriar; Fatemi, Ali (2016) - Yin and Fatemi [5] studied axial fatigue behavior and life prediction of carburized SAE 8620 steel specimens. EXPERIMENTAL RESULTS, PREDICTIONS AND DISCUSSION Monotonic and Cyclic Axial Deformation Behaviors he monotonic and cyclic axial deformation behavior of the materials can be expressed well by a Ramberg-Osgood type equation as: ε ε ε / (1) where ε, εe, εp, σ, E, K and n are total true strain, true elastic strain, true plastic strain, true stress, elastic modulus, strength coefficient, and strain hardening exponent, respectively. Keywords: axial; bending; case; core; cyclic; deformation; fatigue; life; specimens; steel; strain
• Ultrasonic fatigue testing device under biaxial bending by Brugger, C.; Palin-Luc, T.; Osmond, P.; Blanc, M. (2016) - After presenting a brief state of the art on ultrasonic fatigue testing machines, the principle of a new biaxial bending device and the associated stress state are presented hereafter. An interesting review of ultrasonic fatigue testing machines is given by Bathias in [5]. Keywords: bending; biaxial; device; fatigue; frequency; loading; specimen; state; stress; testing
• Analysis of fatigue behaviour of stainless steels under hydrogen influence by Angelova, D.; Yordanova, R.; Yankova, S. (2016) - a) b) c) Figure 1: Fretting fatigue test [3]: a) Test assembly; b) Specimen geometry (in mm); c) Bridge type contact pad. RESULTS AND DISCUSSION A. Fretting fatigue tests he results of fretting fatigue tests are shown in Fig. Keywords: 316l; cycles; fatigue; fretting; hydrogen; mpa; murakami; steel; sus
• Investigation on parametric representation of proportional and nonproportional multiaxial fatigue responses by Albinmousa, J. (2016) - Critical plane; Fatigue damage; Multiaxial fatigue; Parametric representation. [5] Fatemi, A., Socie, D, A critical plane approach to multiaxial fatigue damage including out-of-phase loading, Fatigue & Fract. Keywords: damage; fatigue; life; loading; plane; socie; strain
• On the assessment of multiaxial fatigue damage under variable amplitude loading by Anes, V.; Reis, L.; de Freitas, M. (2016) - On the assessment of multiaxial fatigue damage under variable amplitude loading V. Anes, L. Reis, M. de Freitas IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. [1] Anes, V., Reis, L., de Freitas, M., A new criterion for evaluating multiaxial fatigue damage under multiaxial random loading conditions, Advanced Materials Research, 181 (2014) 1360–1365. Keywords: 304l; amplitude; block; damage; fatigue; loading; map; ssf; steel; stress
• Development of a Very High Cycle Fatigue (VHCF) multiaxial testing device by Vieira, M.; de Freitas, M.; Reis, L.; Ribeiro, A. M. R. (2016) - Thermographic imaging Because of the high frequencies used on this type of specimen testing, material temperature control represents a challenge on the completion of such tests [1, 5]. DOI: 10.3221/IGF-ESIS.37.18 136 Figure 9: Thermographic image of specimen testing in tension/torsion. Keywords: biaxial; device; fatigue; horn; mode; results; specimen; testing
• A multiaxial incremental fatigue damage formulation using nested damage surfaces by Meggiolaro, Marco Antonio; Pinho de Castro, Jaime Tupiassú; Wu, Hao (2016) - In this work, a novel Incremental Fatigue Damage methodology is introduced to continuously account for the accumulation of multiaxial fatigue damage under service loads, without requiring rainflow counters or path-equivalent range estimators. Instead, fatigue damage itself is continuously integrated, based on damage parameters adopted by traditional fatigue models well tested in engineering practice. Keywords: damage; doi; fatigue; load; meggiolaro; models; strain; stress; surfaces
• Multiaxial fatigue criterion based on parameters from torsion and axial S-N curve by Margetin, M.; Durka, R.; Chmelko, V. (2016) - In recent years, a great deal of recommendations how to address problems with multiaxial fatigue life time estimation have been made and a huge progress in the field has been achieved. Until now, however, no universal criterion for multiaxial fatigue has been proposed. Keywords: criterion; doi; fatigue; life; loading; parameters; plane; stress; time
• Computational simulation of biaxial fatigue behaviour of lotus-type porous material by Kramberger, J.; Sori, M.; Sraml, M.; Glodez, S. (2016) - Fatigue properties of porous materials are less frequently published in the literature. A new type of porous material with unidirectional cylindrical pores is Lotus-type porous material, which is often used in lightweight structures, medicine, automotive engineering, sports equipment, etc. Keywords: cycle; damage; doi; fatigue; lotus; material; model; type
• Interaction of shear and normal stresses in multiaxial fatigue damage analysis by Gates, Nicholas R.; Fatemi, Ali (2016) - As a result, in the first part of this study, modifications to the FS parameter are investigated in an attempt to improve fatigue life predictions. Although a factor of ±2.5 error is still very reasonable for multiaxial fatigue life predictions, these results suggest that there is room for some improvement in fatigue damage calculation with respect to the quantification of normal-shear stress/strain interaction. Keywords: damage; data; fatigue; life; loading; parameter; shear; stress; tests
• Comparative study of multiaxial fatigue methods applied to welded joints in marine structures by van Lieshout, P.S.; den Besten, J.H.; Kaminski, M.L. (2016) - [4] Anes, V., Reis, L., De Freitas, M., A new criterion for evaluating multiaxial fatigue damage under multiaxial random loading conditions.       2 2 , 1 , 1 1max A A A (5)      , 1                 1A fully reversed normal stress fatigue limit for bending R      , 1                 1A fully reversed shear stress fatigue limit for torsion R Keywords: amplitude; counting; curve; cycle; damage; fatigue; joints; load; loading; methods; non; path; plane; principal; shear; stress; structures; van
• Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading by Sonsino, C.M.; Franz, R. (2016) - If, in final durability proof tests, the fatigue life should be insufficient, then the required duration can be adjusted by simple geometrical modifications, e. g. by lowering local stresses by the use of larger radii, if this is not possible, by increasing thickness. Under- or overestimation of required fatigue lives or local stresses are, in any case, revealed by the durability proof tests, which are mandatory for vehicle safety components Keywords: amplitude; bending; fatigue; life; loading; results; sonsino; spectrum; stress; stresses
• Designing aluminium friction stir welded joints against multiaxial fatigue by Susmel, L.; Hattingh, D. G.; James, M. N.; Maggiolini, E.; Tovo, R. (2016) - The validation exercise carried out using the experimental results have demonstrated that the MWCM applied in terms of nominal stresses, notch stresses, and also the Point Method is accurate in predicting the fatigue lifetime of the tested FS welded joints, with its use resulting in life estimates that fall within the uniaxial and torsional calibration scatter bands. in terms of nominal stresses referred to the annular section of the parent tube, where: BR=nom,a/nom,a is the ratio between the amplitudes of the axial and torsional nominal stress, R is the nominal load ratio,  is the out-of-phase angle, k is the negative inverse slope, A and A are the amplitudes of the axial and torsional endurance limits extrapolated at N=2106 cycles to failure, and T is the scatter ratio of the amplitude of the endurance limit for 90% and 10% probabilities of survival. Keywords: fatigue; mwcm; r=-1; r=0; stress; stresses
• Estimation of fatigue strength under multiaxial cyclic loading by varying the critical plane orientation by Kurek, Marta; ?agoda, Tadeusz; Carpinteri, Andrea; Vantadori, Sabrina (2016) - Microsoft Word - numero_37_art_29 M. Kurek et alii, Frattura ed Integrità Strutturale, 37 (2016) 221-227; DOI: 10.3221/IGF-ESIS.37.29 221 Focussed on Multiaxial Fatigue and Fracture Estimation of fatigue strength under multiaxial cyclic loading by varying the critical plane orientation Marta Kurek, Tadeusz Łagoda Department of Mechanics and Machine Design, Opole University of Technology - Opole, Poland Andrea Carpinteri, Sabrina Vantadori Department of Civil-Environmental Engineering and Architecture, University of Parma - Parma, Italy ABSTRACT. critical plane; fatigue strength; multiaxial loading. Keywords: angle; bending; fatigue; loading; material; plane; strength; stress; torsion
• Estimation of fatigue lifetime for selected metallic materials under multiaxial variable amplitude loading by Wang, Yingyu; Susmel, Luca (2016) - [2] Wang, Y., Susmel, L.,Critical plane approach to multiaxial variable amplitude fatigue loading, Fracture and Structural Integrity, 33(2015) 345-356. The accuracy of three procedures suitable for estimating multiaxial fatigue lifetime of metallic materials is checked against experimental data taken from the literature. Keywords: amplitude; counting; cycle; fatigue; lifetime; loading; method; plane; stress; wang
• An elasto-plastic approach to estimate lifetime of notched components under variable amplitude fatigue loading: a preliminary investigation by Faruq, N. Zuhair (2016) - One of the main objectives of this study is to investigate variable amplitude fatigue lifetimes of a component. However, under variable amplitude fatigue loading, the direction of maximum variance of the resolved shear strain is used to perform the cycle counting based on the classic Rain-Flow method Keywords: amplitude; c c; components; fatigue; loading; method; plane; strain; stress;  
• Multiaxial fatigue assessment of crankshafts by local stress and critical plane approach by Leitner, M.; Grun, F.; Tuncali, Z.; Steiner, R.; Chen, W. (2016) - MULTIAXIAL FATIGUE STRENGTH CHARACTERIZATION Proportional loading n overview of different concepts to assess the fatigue strength under proportional loading is given in [4]. Normal vs. shear stress loading As the crankshafts local loading scenario is not only affected by normal stresses, additionally the fatigue strength under shear stress (torsion) loading is investigated. Keywords: bending; fatigue; loading; plane; results; shear; strength; stress
• Fatigue methodology for life predictions for the wheel-rail contact area in large offshore turret bearings by Lassen, T.; Mikulski, Z. (2016) - Figure 4: Illustration of mean curve change in fatigue limit from test series 1 to test series 2. THE RANDOM FATIGUE LIMIT METHODOLOGY FOR DATA ANALYSIS he conventional statistical analyses of data points are based on linear regression of fatigue life data only, [5] or by the staircase method for the fatigue limit only, [6]. Keywords: curve; dang; data; fatigue; fatigue limit; limit; series; stress; test; van
• Fatigue modelling for gas nitriding by Weil, H.; Jégou, S.; Barrallier, L. (2016) - Figure 3: Fatigue lifetime profiles for nitrided layers at different failure probabilities in case of a) Crossland and b) Dang Van criteria. [7] Luu, D.H., Maitournam, M.H., Nguyen Q.S., Formulation of gradient multiaxial fatigue criteria, International Journal of Fatigue, 61 (2014) 170-183. Keywords: criterion; dang; failure; fatigue; lifetime; nitriding; stress; van
• Incorporation of Mean/Maximum Stress Effects in the Multiaxial Racetrack Filter by Meggiolaro, Marco Antonio; Tupiassú Pinho de Castro, Jaime; Wu, Hao (2016) - In this way, lower filter amplitudes are automatically used for tensile histories, and higher filter amplitudes for compressive ones, optimizing the filter efficiency without neglecting significant damaging events. Since the norm of s  is equal to the von Mises stress, all distances and filter amplitudes in this 5D sub-space have a physical meaning, they are the von Mises range or the relative von Mises stresses Mises for a straight path between two stress states. Keywords: amplitude; damage; fatigue; filter; mean; meggiolaro; mrf; plane; shear; strain; stress
• The effect of ply folds as manufacturing defect on the fatigue life of CFRP materials by Hörrmann, S.; Adumitroaie, A.; Schagerl, M. (2016) - The effect of ply folds as manufacturing defect on the fatigue life of CFRP materials S. Hörrmann, A. Adumitroaie, M. Schagerl Christian Doppler-Lab for Structural Strength Control of Lightweight Constructions, Institute of Structural Lightweight Design, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria susanne.hoerrmann@jku.at, http://orcid.org/0000-0001-7690-328X adi.adumitroaie@jkt.at, http://orcid.org/0000-0002-0812-5671 martin.schagerl@jku.at ABSTRACT. Hörrmann, S., Adumitroaie, A., Schagerl, M., The effect of ply folds as manufacturing defect on the fatigue life of CFRP materials, Frattura ed Integrità Strutturale, 38 (2016) 76-81. Keywords: damage; defect; direction; fatigue; fiber; fig; fold; loading; material; transverse
• Structure service life assessment under combined loading using probability approach by Kepka, Miloslav; Kepka Jr., Miloslav; Chvojan, Jan; Václavík, Jaroslav (2016) - The probabilistic evaluation of service fatigue life of a structural detail of a road vehicle which was carried out in the present case study was based on the segmentation of random loading processes proposed by Kliman (1) a ef i a i mM, , ,     (1) Using notch factors, the measured stress values are transformed to notch stress values. Keywords: approach; curve; damage; fatigue; length; life; load; loading; probability; service; stress
• Effect of molding processes on multiaxial fatigue strength in short fibre reinforced polymer by Sawada, Takahiko; Aoyama, Hiroshi (2016) - Microsoft Word - numero_38_art_12 T. Sawada et alii, Frattura ed Integrità Strutturale, 38 (2016) 92-98; DOI: 10.3221/IGF-ESIS.38.12 92 Focussed on Multiaxial Fatigue and Fracture Effect of molding processes on multiaxial fatigue strength in short fibre reinforced polymer Takahiko Sawada, Hiroshi Aoyama Research & Development Group, Hitachi, Ltd., takahiko.sawada.dy@hitachi.com,hiroshi.aoyama.ra@hitachi.com ABSTRACT. The non-dimensional equivalent stress σ* is defined to evaluate multiaxial fatigue strength by modifying Tsai-Hill failure criteria. Keywords: 0.2vf; fatigue; processes; sgp; static; strength; stress
• Application of the Moment Of Inertia method to the Critical-Plane Approach by Wu, Hao; Meggiolaro, Marco Antonio; Tupiassú Pinho de Castro, Jaime (2016) - Figure 1: Non-proportional shear strain path B  A (or shear stress path B  A) acting on a B45 candidate plane (at 45o from the free surface), for a general loading history. For 2D tension-torsion histories with stress paths defined by the normal and shear components x and xy, then y  z  xz  yz 0, while y  z   ∙x and xz  Keywords: equivalent; fatigue; method; moi; path; plane; shear; strain; stress;  
• Systematic validation of experimental data usable for verifying the multiaxial fatigue prediction methods by Papuga, J.; Parma, S.; Ruzicka, M. (2016) - Multiaxial fatigue; multiaxial fatigue limit; fatigue prediction; fatigue prediction validation; multiaxial fatigue limit experiment. [55] Kenmeugne, B., Soh Fotsing, B.D., Anago, G.F., Fogue, M., Robert, J.-L., Kenne, J.-P., On the evolution and comparison of multiaxial fatigue criteria, International Journal of Engineering and Technology, 4 (2012) 37-46. Keywords: cycle; data; experiments; fatigue; int; jnl; limit; papuga; set; sets; test; torsion; validation
• Fatigue of weld ends under combined in- and out-of-phase multiaxial loading by Shams, E.; Vormwald, M. (2016) - In the numerical part of the study, notch stresses were calculated with an idealised weld end model. In connection with these models, recommendations for determining notch stresses by applying the finite element (FE) method were developed. Keywords: end; fatigue; fig; loading; stress; stresses; weld
• Comparison between SSF and Critical-Plane models to predict fatigue lives under multiaxial proportional load histories by de Freitas, Manuel; Reis, Luis; Meggiolaro, Marco Antonio; Tupiassú Pinho de Castro, Jaime (2016) - Two pressure-insensitive stress-based critical damage models are briefly reviewed following, one in principle applicable to materials that are shear-sensitive (for which the main cyclic driving force for fatigue damage is ) and the other to tensile sensitive materials. Critical plane models assume that fatigue damage can be properly evaluated based only on the normal and shear stress and/or strain histories acting on the critical plane, and neglects fatigue damage eventually induced on other planes, assuming they do not interact and so do not affect the microcrack initiation process on the critical plane. Keywords: damage; fatigue; model; plane; shear; ssf; stress; torsion
• Fatigue life assessment of thin-walled welded joints under non-proportional load-time histories by the shear stress rate integral approach by Bolchoun, A.; Sonsino, C. M.; Kaufmann, H.; Melz, T. (2016) - For Gaßner-tests real damage sums realD lie between 0.2 and 0.8 for pure axial, pure torsional and combined out-of- phase loadings and for combined in-phase loadings between 1.0 and 1.7 [19]. 3. PUTTING IT ALL TOGETHER he aim of the presented method is to evaluate fatigue life under cyclic variable amplitude in-phase and out-of- phase loadings (“arbitrary loadings”). Keywords: amplitude; axial; fatigue; life; line; loading; phase; shear; stress; time; wöhler
• A critical analysis of the Mises stress criterion used in frequency domain fatigue life prediction by Nieslony, Adam (2016) - Without going into details about derivation, which are well presented in many publications, the final equation for equivalent stress EMS criterion can be written as follow:    Citation: Niesłony, A., A critical analysis of the Mises stress criterion used in frequency domain fatigue life prediction, Frattura ed Integrità Strutturale, 38 (2016) 177-183. Keywords: criterion; fatigue; g f; stress
• Implementation of fatigue model for unidirectional laminate based on finite element analysis: theory and practice by Carrella-Payan, D.; Magneville, B.; Hack, M.; Lequesne, C.; Naito, T.; Urushiyama, Y.; Yamazaki, W.; Yokozeki, T.; Van Paepegem, W. (2016) - Microsoft Word - numero_38_art_25 D. Carrella-Payan et alii, Frattura ed Integrità Strutturale, 38 (2016) 184-190; DOI: 10.3221/IGF-ESIS.38.25 184 Focussed on Multiaxial Fatigue and Fracture Implementation of fatigue model for unidirectional laminate based on finite element analysis: theory and practice D. Carrella-Payan, B. Magneville, M. Hack, C. Lequesne Siemens PLM Software Delphine.carrella@siemens.com, Benoit.magneville@siemens.com, Michael.hack@siemens.com, cedric.lequesne@siemens.com T. Naito, Y. Urushiyama Honda R&D Co Ltd, Tochigi, Japan Tadashi_Naito@n.t.rd.honda.co.jp, Yuta_Urushiyama@n.t.rd.honda.co.jp W. Yamazaki, T. Yokozeki University of Tokyo, Japan (Jp) yamazaki_w@aastr.t.u-tokyo.ac.jp, yokozeki@aastr.t.u-tokyo.ac.jp W. Van Paepegem Ghent Univeristy, Belgium Wim.VanPaepegem@UGent.be ABSTRACT. Citation: Carrella-Payan, D., Magneville, B., Hack, M., Lequesne, C., Naito, T., Urushiyama, Y., Yamazaki, W., Yokozeki, T., Van Paepegem, W., Implementation of fatigue model for unidirectional laminate based on finite element analysis: theory and practice, Frattura ed Integrità Strutturale, 38 (2016) 184-190. Keywords: c c; c d; d d; damage; fatigue; stiffness;  
• Atomistic modeling of different loading paths in single crystal copper and aluminum by Pezer, R.; Trapic, I. (2016) - For the basic response, we have deformed Cu and Al single crystal according to simple loading path including cyclic fatigue harmonic tensile deformation. This result is consistent with stacking faults presence mentioned in context of Fig. 3 regarding different cyclic loading response in Cu and Al single crystal. Keywords: crystal; deformation; dislocation; doi; fatigue; loading; simulation; stress; time
• Multi-purpose fatigue sensor. Part 1. Uniaxial and multiaxial fatigue by Karuskevich, M.V.; Ignatovich, S.R.; Maslak, ?.P.; Menou, A.; Maruschak, P.?.; Panin, S.V.; Berto, F. (2016) - The papers [6-10] present some recent reviews and approaches for multiaxial fatigue and fracture problems. Experimental studies of multiaxial fatigue are based on testing specimens of rather complicated shape. Keywords: biaxial; components; damage; deformation; fatigue; karuskevich; loading; relief; slip; strain; stress
• Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment by Karuskevich, M.V.; Ignatovich, S.R.; Maslak, T.P.; Menou, A.; Maruschak, P.?.; Panin, S.V.; Berto, F. (2016) - It should be noticed that depending on the mechanical impact on the material the structure of surface damages will be varied. Cyclic bending Optical aided investigations of the D16AT alloy surface after cyclic loading suggest that the latter give rise to nucleation of surface damages, formation of strain induced relief (extrusions, intrusions, sliding traces, etc.). Keywords: accumulation; aluminum; bending; damage; damaging; deformation; entropy; fatigue; loading; parameters; regions; relief; sensor; strain; surface
• Development of a multiaxial fatigue damage parameter and life prediction methodology for non-proportional loading by Suman, Sandip; Kallmeyer, Alan; Smith, John (2016) - Most of the prior studies on the prediction of fatigue lives have been limited to uniaxial loading cases, whereas real world loading scenarios are often multiaxial, and the prediction of fatigue life based upon uniaxial fatigue properties may lead to inaccurate results. [2] Stulen, F.B., Cummings H.N., A failure criterion for multiaxial fatigue stresses, Proc. of ASTM, 54 (1954) 822-830. Keywords: damage; data; fatigue; loading; model; parameter; plane; shear; stress; stresses; tests
• Fatigue life assessment of a non-load carrying fillet joint considering the effects of a cyclic plasticity and weld bead shape by Tsutsumi, S.; Morita, K.; Fincato, R.; Momii, H. (2016) - Fatigue life depends strongly on irreversible contributions that accumulate during cyclic loading and unloading of structures. Fatigue life is determined by irreversible deformations, which tend to accumulate during the life of components as a result of loading and unloading. Keywords: cycles; fatigue; fig; life; loading; material; stress
• Tensile and fatigue behaviour of as-forged AZ31B extrusion by Gryguc, A.; Shaha, S.K.; Jahed, H.; Wells, M.; Williams, B.; McKinley, J. (2016) - Figure 5: Fatigue life of forged AZ31B extruded magnesium alloy in comparison with the AZ31 extruded base alloy, obtained at total stress amplitudes of 90-125 MPa. Figure 4: A comparison between base and forged conditions, (a) stress strain curves (b) and K-M plot of the base (as-extruded) and forged AZ31B magnesium alloy during tensile loading. Keywords: alloy; az31b; direction; fatigue; fig; forging; fracture; magnesium; material; samples; tensile; texture
• Random non-proportional fatigue tests with planar tri-axial fatigue testing machine by Inoue, T.; Nagao, R.; Takeda, N. (2016) - Methods for prediction of fatigue life in consideration of life degradation have been proposed using fatigue testing results with two types of fatigue testing machines, a planar cross axial testing machine and an axial and torsion testing T T. Inoue et alii, Frattura ed Integrità Strutturale, 38 (2016) 259-265; DOI: 10.3221/IGF-ESIS.38.35 260 machine Fatigue; Non-proportional; Random; Plane stress; Fatigue life prediction; Testing machine. Keywords: deg; fatigue; fig; lives; machine; plane; principal; stress; testing
• Pressure vessels design methods using the codes, fracture mechanics and multiaxial fatigue by Majid, Fatima; Nattaj, Jilali; Elghorba, Mohamed (2016) - Microsoft Word - numero_38_art_37 F. Majid et alii, Frattura ed Integrità Strutturale, 38 (2016) 273-280; DOI: 10.3221/IGF-ESIS.38.37 273 Focussed on Multiaxial Fatigue and Fracture Pressure vessels design methods using the codes, fracture mechanics and multiaxial fatigue Fatima Majid, Jilali Nattaj, Mohamed Elghorba University of Hassan II, National Superior School of Electricity and Mechanics Casablanca (ENSEM) Besides, an overview of multiaxial fatigue in PVs is detailed. Keywords: asme; damage; design; fatigue; fracture; materials; pressure; stress; theory
• Creep-fatigue life evaluation of high chromium ferritic steel under non-proportional loading by Morishita, T.; Murakami, Y.; Itoh, T.; Tanigawa, H. (2016) - This figure shows that dark symbols for PP-FF and CI-FF tests are plotted beside the bold line and NP can evaluate non-proportional loading tests at the high strain rate. 102 103 104 Factor of 2 PP-FF PP-SS PP-SS* PP-TH-3 PP-TH-10 PP-CH-3 PP-CH-10 1.0 2.0 St ra in r an ge   N P , % Failure life Nf, cycles CI-FF CI-SS CI-SS* CI-TH-3 CI-TH-100.4 0.2 Figure 5: Correlation of Nf by non-proportional strain range. Keywords: failure; fatigue; life; loading; strain; test
• Fatigue strength of SS400 steel under non-proportional loading by Morishita, T.; Takaoka, T.; Itoh, T. (2016) - In the circle loading test; non-proportional strain range tends to overestimate failure life in the high cycle fatigue region because the effect of non-proportional loading becomes weak. The circle loading test is non-proportional loading test in which axial stress and shear stress have 90 degrees sinusoidal out-of-phase difference. Keywords: circle; failure; fatigue; life; loading; pull; push; strain; stress; test
• A statistically self-consistent fatigue damage accumulation model including load sequence effects under spectrum loading by Xianmin, Chen; Qin, Sun; Hongna, Dui; Junling, Fan (2016) - With probabilistic modifications in the present model, the calculative consistency is achieved between fatigue damage and fatigue life. Fatigue damage; Fatigue life; Probabilistic statistical model; Load sequence effect; Statistical self-consistency. Keywords: amplitude; damage; distribution; fatigue; fatigue damage; fatigue life; level; life; loading; model; spectrum; stress; test
• A probabilistic approach for multiaxial fatigue criteria by Muñiz Calvente, M.; Blasón, S.; Fernández Canteli, A.; de Jesús, A.; Correia, J. (2016) - In the following, each step is explained in detail: Step 1: Performing an experimental program: To perform an experimental program using different biaxial loading ranges and to obtain the fatigue life for each experiment Step 2: Calculation of multiaxial fatigue parameter: The different biaxial loading ranges selected in the previous step are using to obtain the values of GP for each plane of the specimen. [8] Papadopoulos, I. V., A review of multiaxial fatigue limit criteria, Advanced Course on High-Cycle Metal Fatigue, (1997). Keywords: criteria; damage; failure; fatigue; parameter; plane; probability; value
• Fatigue assessment by energy approach during tensile tests on AISI 304 steel by Risitano, A.; Corallo, D.; Guglielmino, E.; Risitano, G.; Scappaticci, L. (2016) - Moreover fatigue tests at increasing loads were carried out on steel by a stepwise succession, applied to the same specimen, for applying the thermographic method. AISI 304 specimens with rectangular cross-sections were tested using static test and fatigue tests (R= -1). Keywords: energy; fatigue; limit; method; risitano; specimen; temperature; tensile; tests; time
• S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain by Zou, Li; Yang, Xinhua; Tan, Jianrong; Sun, Yibo (2018) - A Master S-N curve can be established according to Eq. 6 based on a set of welding fatigue data. In the process of welding fatigue design, we should also design according to each fatigue characteristics domain rather than in the whole fatigue domain. Keywords: alloy; aluminum; characteristics; curve; data; doi; domain; fatigue; joints; life; method; set; stress
• A thermography-based method for fatigue behavior evaluation of coupling beam damper by Zhang, Zhe; Ou, Jinping; Li, Dongsheng; Zhang, Shuaifang; Fan, Junling (2017) - Based on the temperature variation related to fatigue damage process, the relationship between the plastic deformation and thermal energy dissipation was quantitatively established. As a consequence, the fatigue energy dissipation is in accordance with the regularity of thermal energy dissipation, which means that the temperature evolution could reflect the energy dissipation characteristics during the fatigue process. Keywords: curve; damage; damper; dissipation; energy; energy dissipation; fatigue; hysteresis; opening; plastic; process; ratio; rise; temperature; thermal
• Multiaxial elastoplastic cyclic loading of austenitic 316L steel by Mazánová, V.; Polák, J.; Škorík, V.; Kruml, T. (2017) - Cyclic softening followed for higher strain amplitudes by long-term cyclic hardening was observed. Cyclic hardening/softening curves which show long-term softening followed by cyclic hardening at higher strain amplitudes are nearly identical with those measured by Hong et al. Keywords: amplitude; cyclic; cycling; fatigue; phase; strain; stress; surface
• A two-step multiaxial racetrack filter algorithm for non-proportional load histories by Meggiolaro, Marco Antonio; Pinho de Castro, Jaime Tupiassú; Wu, Hao (2017) - Engineering stresses and strains are calculated from load/torque cell measurements and from an MTS 632.68 axial/torsional extensometer, and then converted to true stresses and strains [13]. The MRF preserves load order, allowing the synchronous filtering of stress and strain histories, without filtering out important multiaxial load reversal points. Keywords: amplitude; fatigue; fig; filter; load; mrf; partitioning; path; points; stress
• Cracking directions in multiaxial low cycle fatigue at high and room temperatures by Sakane, Masao; Itoh, Takamoto (2017) - Cracking direction is a physical background for developing a multiaxial LCF damage model and therefore studying the relationship between cracking direction and fatigue life is meaningful. Strain range dependency of cracking direction in torsion low cycle fatigue Cracking direction in torsion LCF is also influenced by strain range, shear cracking at high strain ranges and principal cracking at low stain ranges shown in Fig.6 Keywords: cracking; cycle; direction; fatigue; principal; shear; specimen; strain; torsion
• Determination of the critical plane orientation depending on the fatigue curves for bending and torsion by Kurek, Marta; ?agoda, Tadeusz (2017) - Critical plane; Fatigue life; Equivalent stress; Scatter analysys. The work aimed at finding an algorithm for predicting fatigue life accompanying random loads was undertaken by Macha in 1979 Keywords: analysis; fatigue; life; materials; plane; scatter
• Effect of spectral cross-correlation on multiaxial fatigue damage: simulations using the critical plane approach by Carpinteri, Andrea; Spagnoli, Andrea; Vantadori, Sabrina (2017) - Microsoft Word - numero_41_art_6 Carpinteri A. et alii, Frattura ed Integrità Strutturale, 41 (2017) 40-44; DOI: 10.3221/IGF-ESIS.41.06 40 Focused on Multiaxial Fatigue Effect of spectral cross-correlation on multiaxial fatigue damage: simulations using the critical plane approach Andrea Carpinteri, Andrea Spagnoli, Sabrina Vantadori University of Parma, Italy andrea.carpinteri@unipr.it, http://orcid.org/0000-0002-8489-6005 andrea.spagnoli@unipr.it, http://orcid.org/0000-0002-0592-7003 sabrina.vantadori@unipr.it, http://orcid.org/0000-0002-1904-9301 ABSTRACT. Citation: Carpinteri, A., Spagnoli, A., Vantadori, S., Effect of spectral cross- correlation on multiaxial fatigue damage: simulations using the critical plane approach, Frattura ed Integrità Strutturale, 41 (2017) Keywords: damage; fatigue; loading; spectral
• Evaluation and visualization of multiaxial fatigue behavior under random non-proportional loading condition by Morishita, Takahiro; Ogawa, Fumio; Itoh, Takamoto (2017) - IS-METHOD Definition of stress and strain n non-proportional multiaxial fatigue, principal directions of stresses and strains vary during a cycle. There are a lot of structural components that are subjected to non-proportional multiaxial loading, but the verification of shortened fatigue life has not been carried out mostly. Keywords: cycle; evaluation; fatigue; life; loading; method; non; plane; strain; stress
• Joined application of a multiaxial critical plane criterion and a strain energy density criterion in low-cycle fatigue by Carpinteri, Andrea; Fortese, Giovanni; Ronchei, Camilla; Scorza, Daniela; Vantadori, Sabrina; Berto, Filippo (2017) - Moreover, the complexity of the stress/strain state is further increased by the presence of multiaxial fatigue loadings as those experienced by structural components during in-service operation. In particular, the following remarks can be made: - for uniaxial fatigue loading (that is, pure tension or pure torsion loading, Fig. 1(a)), 71% of fatigue life calculation results are included into the scatter band 3 ; - for multiaxial fatigue loading (that is, combined tension and torsion loading with different values of biaxiality ratio, Fig. 1(b)), 76% of fatigue life calculation results are included into scatter band 3 . Keywords: control; criterion; doi; fatigue; life; loading; strain; volume
• Multiaxial fatigue property of type 316 stainless steel using hollow cylinder specimen under combined pull loading and inner pressure by Morishita, Takahiro; Takada, Yuta; Itoh, Takamoto (2017) - The Equi-biaxial, the Square-shape and the L-shape are multiaxial loading tests in which combined cyclic pull loading and inner pressure are applied. Therefore, the small amount of data of fatigue tests with a wide range of stress ratios is mainly due to the fact. Keywords: fatigue; inner; loading; pressure; pull; shape; specimen; stress; tests
• Multiaxial fatigue strength of titanium alloys by Berto, Filippo; Campagnolo, Alberto; Welo, Torgeir; Carpinteri, Andrea (2017) - [12-13], to deal with multiaxial fatigue loadings. Axisymmetric notched specimens have been tested under combined tension and torsion fatigue loadings, both proportional and non-proportional, taking into account different nominal load ratios (R = -1 and 0). Keywords: control; energy; fatigue; loading; mode; notch; specimens; stress; tension; torsion
• Notched multiaxial fatigue of Al7050-T7451: on the need for an equivalent process zone size by Sá, M.V.C; Ferreira, J.L.A; da Silva, C.R.M; Araújo, J.A. (2017) - Multiaxial fatigue; Notched fatigue; stress gradient; Process zone; Critical distance; Al 7050-T7451. Aplication of PM (TDC) and MWCM for life estimation in multiaxial fatigue The calibration of the Modified Wholer Curve Model (MWCM) can be achieved using the σ-N and τ-N curves for unnotched specimens. Keywords: curve; distance; fatigue; life; pull; specimens; stress; t7451; tests; torsion
• Prediction of fatigue crack initiation under biaxial loading by Sahadi, J.V.; Nowell, D.; Paynter, R.J.H. (2017) - Parameter Axial Shear Fatigue Strength Coefficient  f '   f f ' '    / 3 Fatigue Strength Exponent b γb b Fatigue Ductility Coefficient  f '   f ' ' fγ 3 Fatigue Ductility Exponent c γc c Modulus E     E G  2 1 Table 2: Correlation between material fatigue parameters. [8] Sahadi, J. V., et al., Comparison of multiaxial fatigue parameters using biaxial tests of Waspaloy. Keywords: biaxial; fatigue; life; load; parameter; plane; predictions; shear; strain; stress; uniaxial
• Sharp three-dimensional notches under combined nominal normal and shear fatigue loading by Vormwald, M.; Shams, E. (2017) - In the numerical investigation notch stresses were calculated using an idealised weld end model. In connection with these models, recommendations for determining notch stresses by applying the finite element (FE) method were developed. Keywords: fatigue; fig; loading; specimens; stress; stresses; vormwald; weld
• Simple criterion for predicting fatigue life under combined bending and torsion loading by Slámecka, K.; Pokluda, J. (2017) - In this paper, an empirical approach for constant amplitude, proportional axial and torsion loading is introduced to serve as a basic engineering tool for estimating fatigue life of rotational structural parts. [6] Karolczuk, A., Kluger, K., Analysis of the coefficient of normal stress effect in chosen multiaxial fatigue criteria, Theor. Keywords: criterion; curve; fatigue; life; loading; log; middle; torsion
• Gradient approach for the evaluation of the fatigue limit of welded structures under complex loading by Nadot, Y.; Halm, D.; Dal Cero Coelho, F. (2017) - Figure 8: Fatigue stress (Vu criterion) computed at the hot spot for constant amplitude loading. Fatigue results are analyzed through the type of fatigue mechanisms depending on the loading type. Keywords: amplitude; bending; fatigue; fig; gradient; loading; stress
• Influence of the stress gradient on the fatigue life calculation of a martensitic high strength steel by Miloševic, Igor; Winter, Gerhard; Grün, Florian; Kober, Martin (2017) - Figure 8: Lifetime evaluation of D4 specimens depending on the type of stress gradient approach. Figure 9: Lifetime evaluation of D7.5 specimens depending on the type of stress gradient approach. Keywords: approach; calculation; fatigue; gradient; lifetime; limit; results; specimen; stress; stress gradient
• Effect of corrosion and sandblasting on the high cycle fatigue behavior of reinforcing B500C steel bars by Vasco, Marina C.; Polydoropoulou, Panagiota; Chamos, Apostolos N.; Pantelakis, Spiros G. (2017) - [10] Apostolopoulos, C. A., Papadakis, V. G., Consequences of steel corrosion on the ductility properties of reinforcement bar, Constr. In the present work, the effect of corrosion and sandblasting on the high cycle fatigue behavior of reinforcing steel bars is investigated. Keywords: bars; behavior; corrosion; days; exposure; fatigue; fig; material; sandblasting; specimen; steel; tensile; tests
• Modeling of the stress-strain relationship for specimens made of S355J0 steel subjected to bending block loading with mean load by Pawliczek, R.; Lachowicz, C.T (2017) - If the hysteresis loop is moving along strain axis for the load with increased mean load values (Fig. 4a) in the case of decreasing mean load value it is observed, that after first sequence with higher mean load value some hardening effect occurs, – Garud-Mroz and Chu cyclic plasticity models gives very similar results of calculations of stress amplitude and mean stress value for both analyzed cases of the load path (Fig. 11 and Fig.12), – proposed model is more sensitive for mean value in the block loads in the case of increased mean load value for following sequences in the block comparing to the cyclic plasticity models (Fig. 11), where for second case of loads similar results for all of three analyzed models were obtained (Fig. 12). The paper presents results of calculation for modelling of the stress- strain relationship in the case of block loads with mean load value. Keywords: amplitude; block; fatigue; fig; hysteresis; load; loading; mean; strain; stress; tests; value
• Identification of fatigue and mechanical characteristics of explosively welded steel - titanium composite by Kowalski, M. (2017) - Fatigue properties of clad materials are subject of the lower number of studies than other topics combined with explosive technology. Figure 2: Interface zone location Stresses calculated on the basis of mechanical properties of each section can be used in finite element method or in characterization of fatigue properties. Keywords: fatigue; interface; kowalski; materials; properties; steel; titanium; welding
• Fatigue strength of corroded bolted connection by Zampieri, Paolo; Curtarello, Andrea; Pellegrino, Carlo; Maiorana, Emanuele (2017) - Geometry effects on corrosion fatigue in offshore structural steels. The proposed approaches for corrosion fatigue life assessment are based on the use of S-N curves and cumulative damage laws. Keywords: corrosion; curve; fatigue; life; samples; specimens; steel; tank; tests
• Characterization of uniaxial fatigue behavior of precipitate strengthened Cu-Ni-Si alloy (SICLANIC(TM)) by Saadouki, B.; Elghorba, M.; Pelca, PH.; Sapanathan, T.; Rachik, M. (2017) - To optimize high cycle fatigue tests, we chose classical specimen shape with circular section according to the ASTM E466-07 standard (Fig. 1) at MOROCCO CETIM. In [6], authors investigated the microstructure of the material at different heat treatment states and its influence on the low cycle fatigue (LCF) and high cycle fatigue (HCF). Keywords: alloy; behavior; curve; cycle; cyclic; doi; failure; fatigue; hardening; plastic; siclanic; softening; strain; stress
• Fatigue assessment of Ti-6Al-4V titanium alloy laser welded joints in absence of filler material by means of full-field techniques by Corigliano, Pasqualino; Crupi, Vincenzo; Guglielmino, Eugenio; Maletta, Carmine; Sgambitterra, Emanuele; Barbieri, Giuseppe; Caiazzo, Fabrizia (2017) - Microsoft Word - numero_43_art_13 P. Corigliano et alii, Frattura ed Integrità Strutturale, 43 (2018) 171-181; DOI: 10.3221/IGF-ESIS.43.13 171 Fatigue assessment of Ti-6Al-4V titanium alloy laser welded joints in absence of filler material by means of full-field techniques Pasqualino Corigliano, Vincenzo Crupi, Eugenio Guglielmino University of Messina, Italy pcorigliano@unime.it, http://orcid.org/0000-0003-0319-048X crupi.vincenzo@unime.it, http://orcid.org/0000-0001-7498-4733 eguglie@unime.it, http://orcid.org/0000-0001-7793-7406 Carmine Maletta, Emanuele Sgambitterra University of Calabria, Italy carmine.maletta@unical.it, http://orcid.org/0000-0002-9204-5358 emanuele.sgambitterra@unical.it, http://orcid.org/0000-0001-5593-399X Giuseppe Barbieri Centro Ricerche ENEA Casaccia – Rome, Italy giuseppe.barbieri@enea.it, http://orcid.org/0000-0001-5583-8634 Fabrizia Caiazzo University of Salerno, Italy f.caiazzo@unisa.it ABSTRACT. CONCLUSION he fatigue behavior of titanium welded joints was analyzed, the welding was performed using a laser source and in the absence of filler material. Keywords: alloy; corigliano; fatigue; figure; joints; laser; load; temperature; titanium; welding
• Probabilistic-Based Analysis for Damaging Features of Fatigue Strain Loadings by Mod Yunoh, Mohd Faridz; Abdullah, Shahrum; Md. Saad, Mohamad Hanif; Mohd Nopiah, Zulkifli; Nuawi, Mohd Zaki; Karam Singh, Salvinder Singh (2018) - This means that it can inflict higher fatigue damage. The strain-life model commonly used for the prediction of fatigue strain life is the Coffin-Manson relationship model. Keywords: amplitude; analysis; damage; data; distribution; fatigue; probability; saesus; segments; signal; strain; weibull
• Fatigue Behaviour and Mean Stress Effect of Thermoplastic Polymers and Composites by Lu, Zongjin; Feng, Bill; Loh, Charlie (2018) - Based on the test data, mean stress equations (Eqns. 1 to 5) were evaluated by calculating the equivalent stress amplitude Sao. [9], Mortazavian and Fatemi [10] recommended Walker for mean stress correction after the investigation on polypropylene copolymer, polypropylene-elastomer blend, short glass fibre reinforced polybutylene terephthalate and polyamide 6. Keywords: behaviour; fatigue; fibre; glass; materials; mean; polymer; stress
• A progessive damage fatigue model for unidirectional laminated composites based on finite element analysis: theory and practice by Hack, Michael; Carrella-Payan, D.; Magneville, B.; Naito, T.; Urushiyama, Y.; Yamazaki, W.; Yokozeki, T.; Van Paepegem, W. (2018) - Fatigue damage laws The presented methodology is based on residual stiffness fatigue laws combined with an efficient damage operator approach to calculate the progressive damage and residual stiffness. Keywords: c c; c d; d d; damage; fatigue; stiffness;  ;  
• Fatigue life prediction of 5083 and 5A06 aluminum alloy T-welded joints based on the fatigue characteristics domain by zou, li; Yang, Xinhua; Tan, Jianrong; Xu, Hongji; Sun, Yibo (2018) - Each lg 2.426 0.0907lgS N = − lg 3.302 0.2183lgS N = − L. Zou et alii, Frattura ed Integrità Strutturale, 45 (2018) 53-66; DOI: 10.3221/IGF-ESIS.45.05 64 class of welded joint fatigue test samples forms a relatively independent sample space, which is called fatigue characteristic domain. Fatigue life; Welded joints; Fatigue characteristic domain. Keywords: 5a06; alloy; aluminum; curve; domain; fatigue; joint; life; master; material; stress; test
• High cycle fatigue assessment of steel load-carrying cruciform welded joints: an overview of recent results by wei, song; Liu, Xuesong (2018) - It is defined as c 0.28R mm for steel welded joints. 4 compares the experimental data relevant to LCWJ made of 10CrNi3MoV steel with the scatter band suggested to design steel welded joints against fatigue. Keywords: failure; fatigue; joints; lcwj; q345; root; steel; stress; toe; weld; weld root
• Fatigue life assessment for a welded detail: advantages of a local energetic approach and experimental validation by Viespoli, Luigi; Berto, Filippo; Somà, Aurelio (2018) -                                                      Keywords: energy; fatigue; life; r r; strain; stress;  ;  ;  ;  
• Numerical Analysis and Optimization of the Residual Stresses Distribution Induced by Cold Expansion Technique by BALTACH, Abdelghani; Djebli, Abdelkader; Bendouba, Mostefa; Besseghier, El Hadj; Aid, Abdelkrim (2018) - This paper presents a numerical investigation about the influence of mandrel shape on residual stresses induced by the cold expansion procedure. Cold expansion; Fastener hole; Residual stress; FEM method; Taper degree. Keywords: distribution; doi; edge; expansion; face; fatigue; fig; hole; mandrel; pin; stresses; taper; thickness
• Numerical modelling of residual stress redistribution induced by TIG-dressing: TIG-dressing numerical modelling by Ferro, Paolo; Berto, Filippo; Bonollo, Franco; Montanari, Roberto (2018) - P. Ferro et al., Frattura ed Integrità Strutturale, 47 (2019) 221-230; DOI: 10.3221/IGF-ESIS.47.17 228 Figure 10: Stress distribution near the weld toe of the as-welded joint and the used reference system Figure 11: Local reference system (a), according to the blunt V-Notch theory, and residual stress distribution after TIG-dressing (b). CONCLUSIONS simplified model was proposed to simulate the TIG-dressing process without using the fluid-mechanics coupled computation. Experimental and numerical analyses of residual stress distributions in TIG welding process for 304L stainless steel. Keywords: dressing; fatigue; ferro; joints; numerical; strength; stress; tig; weld; welding
• Damage evaluation under complex fatigue loading conditions by Reis, Luis; Caxias, Joao; Soares, Henrique; Costa, Pedro R.; Anes, Vitor; Freitas, Manuel (2019) - Crack initiation and growth path under multiaxial fatigue loading in structural steels, International Journal of Fatigue, 31, pp. Fatigue damage and life assessment of multiaxial loadings is still an issue yet to resolve. Keywords: amplitude; damage; doi; fatigue; life; loading; method; plane; reis; shear; ssf; strain; stress
• A comparison between S-N Logistic and Kohout-Věchet formulations applied to the fatigue data of old metallic bridges materials by Barbosa, Joelton Fonseca; Correia, José A.F.O.; Montenegro, Pedro; Júnior, Raimundo Carlos Silverio Freire; Lesiuk, Grzegorz; De Jesus, Abílio M.P.; Calçada, Rui A.B. (2019) - Therefore the comparison between fatigue models was evaluated qualitatively and quantitatively. This approach can be applied for fatigue results from metallic bridge materials to allow the comparison of experimental fatigue data from distinct mean stresses. Keywords: curve; data; fatigue; fatigue data; kohout; law; logistic; model; power; region; věchet
• The “Projection-by-Projection” (PbP) criterion for multiaxial random fatigue loadings: Guidelines to practical implementation by Benasciutti, Denis; Zanellati, Davide; Cristofori, Alessandro (2018) - No. of stress case Description Vxx Vyy Cxy rxx,yy rxx,xy ryy,xy 1 Biaxial tension (correlated) 3 3 0 1 0 0 2 Biaxial tension (not correlated) 3 3 0 0 0 0 3 Bending-torsion (correlated) 3 0 1 0 1 0 4 Bending-torsion (not correlated) 3 0 1 0 0 0 Table 2: Variance and correlation degree characterizing the biaxial stress states considered in numerical simulations. At the same time, the method can also account for different material behaviors depending on different types of multiaxial stress Keywords: analysis; benasciutti; case; damage; deviatoric; doi; domain; fatigue; frequency; loading; material; matrix; method; pbp; psd; step; stress; tension; torsion
• Fatigue assessment of welded joints by means of the Strain Energy Density method: Numerical predictions and comparison with Eurocode 3: Numerical predictions and comparison with Eurocode 3 by Foti, Pietro; Berto, Filippo; Filippi, Stefano (2018) -                                                              (11)                                   (9)    Keywords: doi; fatigue; joints; mode; sed; strength;  
• Assessment of tensile and fatigue behavior of PEEK in a physiologically relevant environment by Peron, Mirco; Torgersen, Jan; Berto, Filippo (2018) - Figure 7: Synthesis of PEEK fatigue data by means of SED approach. Notched fatigue behavior of PEEK, Biomaterials, 31(35), pp. Keywords: approach; behavior; berto; doi; energy; fatigue; notch; peek; peron; radius; sed; strain; stress; tensile
• Low cycle fatigue and creep-fatigue response of the 316Ti stainless steel by Krovvidi, S C S P Kumar; Goyal, Sunil; Bhaduri, A K (2019) - The variation of low cycle fatigue life with total, plastic and elastic strain amplitudes has been analyzed on the basis of strain-life relationship, which is defined by the following equation:    2 2 2 f b ct f f fN N E  SS 316Ti; Bellows; Low cycle fatigue; Creep-fatigue interaction. Keywords: bellows; creep; design; doi; fatigue; life; material; strain; stress; temperature; tensile
• Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading by Bressan, Stefano; Ogawa, Fumio; Itoh, Takamoto; Berto, Filippo (2019) - The conclusions can be summarized as follows: - Heat treatment on additively manufactured Ti-6Al-4V has a detrimental effect on low cycle fatigue life, for both non- proportional and proportional loading. Low cycle fatigue life of Ti–6Al–4V alloy under non-proportional loading, Int. Keywords: curves; doi; failure; fatigue; heat; layer; orientation; specimen; strain; stress
• Fracture of elastic-brittle and elastic-plastic material in cantilever cyclic bending by Kurek, Andrzej; Lagoda, Tadeusz (2019) - Only in few studies, the differences in fatigue life resulting from a load condition [1 - 5] were noted. In the study [6] it has been shown that the change of a bending plain itself by the angle of π/2 results in a change of fatigue life. Keywords: 16mo3; aluminium; bending; case; fatigue; kurek; life; steel; strain
• Structural Integrity Assessment of Weld for Joining Waveguide to Annular Linear Induction Pump Subjected to Vibration by Kumar, Ashish; Bhat, Y.V. Nagaraja; Sreedhar, B.K.; Raj, S.I. Sundar; Prakash, V.; Selvaraj, P. (2019) - The second part, which is the solution of particular integral, is stabilized stress cycle with same frequency as the frequency of excitation. Transient analysis at 10 Hz frequency: Assuming that the vibration of ALIP sets the waveguide under harmonic vibration, the weld would be subjected to maximum stress cycle. Keywords: alip; body; fatigue; fig; frequency; stress; vibration; waveguide; weld
• Fatigue strength of inner knurled interference fit joined by forming and cutting methods by Suchy, Lukas; Leidich, E.; Hasse, A.; Gerstmann, T.; Awiszus, B. (2019) - This study shows that knurled interference fit connections, joined by forming, achieve a higher fatigue strength and a higher maximum static torque than connections joined by cutting. Regarding the forming and cutting joining process, existing studies on fatigue strength of pre-strained specimen [11, 12] suggest a higher fatigue strength of the investigated materials. Keywords: cutting; fatigue; figure; fit; forming; hub; interference; joining; kif; shaft
• Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading by Papuga, Jan; Nesládek, Martin; Jurenka, Josef (2019) - [7] evaluated the Papadopoulos criterion, together with other multiaxial fatigue strength criteria. Comparison of fatigue criteria for combined bending-torsion loading of nitrided and virgin specimens. Keywords: cases; criteria; data; doi; effect; experiments; fatigue; fatigue strength; loading; method; mpa; papuga; phase; phase loading; phase shift; results; shift effect; specimens; stress; torsion
• Granite stone subjected to ultrasonic fatigue tests under three point bending modality by DOMINGUEZ ALMARAZ, Gonzalo Mariano; DOMINGUEZ, Alexiane; ALONSO, Necker J. TRUJILLO (2019) - Microsoft Word - 2317 D. Alexiane et alii, Frattura ed Integrità Strutturale, 48 (2019) 70-76; DOI: 10.3221/IGF-ESIS.48.09 70 Focussed on “Crack Paths” Granite stone subjected to ultrasonic fatigue tests under three point bending loading Dominguez Alexiane Ultrasonic fatigue tests are carried out under the modality of three point bending on the granite stone. Keywords: doi; fatigue; fig; fracture; granite; loading; specimen; temperature; testing; tests
• Analysis of dissipated energy and temperature fields at severe notches of AISI 304L stainless steel specimens by Rigon, Daniele; Ricotta, Mauro; Meneghetti, Giovanni (2018) - In the last years, a large amount of fatigue test results from plain and bluntly notched specimens made of AISI 304L stainless steel were synthetized in a single scatter band by adopting the specific heat loss per cycle (Q) as a damage parameter. F http://www.gruppofrattura.it/VA/47/2320.mp4 D. Rigon et alii, Frattura ed Integrità Strutturale, 47 (2019) 334-347; DOI: 10.3221/IGF-ESIS.47.25 335 Figure 1: Fatigue test results of plain and notched AISI 304L in term of net-section stress amplitude (a) and re-elaborated in terms of specific heat loss Q (b). Keywords: distribution; doi; energy; fatigue; fig; heat; notch; temperature; test; tip
• The Strain energy density to estimate lifetime of notched components subjected to variable amplitude fatigue loading by Susmel, Luca; Berto, Filippo; Hu, Zheng (2018) - Such a validation exercise allowed us to demonstrate that the extension of the SED approach as proposed in the present paper is capable of accurately estimating fatigue damage in notched components subjected to in- service VA fatigue loading. Even if a lot of theoretical and experimental work has been carried out to check the accuracy and reliability of the SED approach, surprisingly, so far no systematic attempt has been made to extend the use of this powerful method to those situations involving VA fatigue loading. Keywords: cds; cus; damage; fatigue; loading; notch; radius; sed; specimens; stress
• Characterisation and Evaluation of the Mechanical Behaviour of Endodontic-grade NiTi Wires by Pereira, Samuel; Carvalho, André Rui Dantas; Reis, Luís; Freitas, Manuel; Montalvão, Diogo (2019) - Fatigue; Superelastic Alloys; NiTi wires; Life Evaluation INTRODUCTION ndodontic files have been used in dentistry since the middle ages and, as so, the shape, material and operation mode have changed since those days. Fatigue Tests The results for the Strain vs Number of Cycles for the fatigue tests under different levels of strain induced in the 0.58mm and 0.25mm NiTi wires are presented in Fig. Keywords: alloys; doi; fatigue; life; niti; phase; strain; wire
• Post- Impact Fatigue Damage Analysis of Quasi Isotropic CFRP Laminates through Infrared Thermography by Prakash, Raghu Vasu; John, Mathew (2019) - For other specimens, the impact and post-impact fatigue damage is severe and is distributed over the specimen gage section and hence the temperature change at the onset of tensile failure (ply brakeage) is negligible. From the above, it can be said that for the qualitative analysis of post-impact fatigue damage in composites the ISB configuration is preferred over ISF and the HB configuration may be chosen over HF as it gives more accurate results. Keywords: damage; fatigue; fig; impact; loading; post; response; specimens; surface; temperature; tensile; thermography
• Fatigue Strength Analysis of Bogie Frame In Consideration of Parameter Uncertainty by Chen, Bingzhi; Zhi, Pengpeng; Li, Yonghua (2019) - [10] proposed a method of evaluating bogie frame fatigue strength based on GSFLD, which combines multi-body dynamics with structural strength simulation and verified the accuracy of the evaluation through experiments. Currently, there are many reports about fatigue strength analysis of bogie frame at home and abroad. Keywords: bogie; design; f f; f ; fatigue; fatigue strength; frame; strength; stress; − ;  −;  
• Fatigue reliability assessment of small sample excavator working devices based on Bootstrap method by Shao, Yuhong; Lu, Pengmin; Wang, Binhua; Xiang, Qingyi (2019) - Citation: Shao Y.H., Lu P.M., Wang B.H., Xiang Q.Y., Fatigue reliability assessment of small sample excavator working devices based on Bootstrap method, Frattura ed Integrità Strutturale, 48 (2019) 757-767. However, for the excavator working device, there is a lack of fatigue life reliability test and evaluation research. Keywords: bootstrap; device; distribution; excavator; fatigue; life; method; reliability; sample; working; y y
• Fatigue strength evaluation and fracture behavior of joined dual phase steel/AA6061-T6 aluminum alloy by Perez Mora, Ruben; Cruz Gonzalez, Celso Eduardo; Santillan Gutierrez, Saul Daniel; Taha Tijerina, Jose Jaime; Vargas Arista, Benjamin; Barba Pingarron, Arturo (2019) - An investigation on the strength of single lap adhesive joints with a wide range of materials and dimensions using a critical distance approach, Int. T C. E. Cruz Gonzalez et alii, Frattura ed Integrità Strutturale, 48 (2019) 530-544; DOI: 10.3221/IGF-ESIS.48.51 532 Adhesives exhibit a large amount of plasticity that has an important impact on the fatigue strength of adhesive joints. Keywords: adhesive; betamate; dc-80; fatigue; fig; fracture; joints; length; load; maximum; mp55420; overlap; shear; specimens; strain; strength; stress
• Evaluation on the fatigue behavior of sand-blasted AlSi10Mg obtained by DMLS by Pola, Annalisa; Battini, Davide; Tocci, Marialaura; Avanzini, Andrea; Girelli, Luca; Petrogalli, Candida; Gelfi, Marcello (2019) - Fractured surface analysis The observation of fracture surface of fatigue samples at low magnification by digital microscope allows to reveal the presence of a large flat region, typical of fatigue propagation, with a small final overload area (Fig. 12). The fractured surfaces of fatigue test samples were observed by LEICA 300 digital microscope and LEO EVO 40 scanning electron microscope (SEM) equipped with an Oxford energy dispersive spectroscopy (EDS) probe for elemental analysis. Keywords: alsi10; analysis; blasting; defects; doi; fatigue; fig; laser; mater; melting; mpa; samples; sand; specimens; stress; surface
• The effect of temperature on low-cycle fatigue of shape memory alloy by Iasnii, Volodymyr; Yasniy, Petro; Baran, Denys; Rudawska, Anna (2019) - Low cycle fatigue of TiNi shape memory alloy and formulation of fatigue life, J. Eng. Review on structural fatigue of NiTi shape memory alloys: Pure mechanical and thermo- mechanical ones, Theor. Keywords: alloy; cycles; doi; energy; failure; fatigue; shape; temperature
• Influence of static mean stresses on the fatigue behavior of 2024 aluminum alloy under multiaxial loading by Yankin, Andrey; Wildemann, Valerii; Belonogov, Nikolai; Staroverov , Oleg (2019) - Crack initiation and growth path under multiaxial fatigue loading in structural steels, Int. CORRELATION OF THE EXPERIMENTAL RESULTS WITH MULTIAXIAL FATIGUE MODELS s has been pointed out before the static torsional stress effect less pronounced than the static tensile stress effect in ductile metals. Keywords: doi; fatigue; mean; static; stress; torsional; tsts1
• A Numerical framework for fatigue lifetime prediction of complex welded structures by Hectors, Kris; De Waele, Wim; Loccufier, Mia; De Backer, Hans (2019) - Finite element modelling for fatigue stress analysis of large suspension bridges, J. Sound Vib., 261(3), pp. Comparison of different structural stress approaches for fatigue assessment of welded ship structures, Mar. Struct., 18(7–8), pp. Keywords: damage; doi; element; fatigue; fig; finite; framework; load; model; node; spot; stress; submodel; toe; vector; weld
• A comparative study on the fatigue life of the vehicle body spot welds using different numerical techniques: Inertia relief and Modal dynamic analyses by Farrahi, G.H.; Ahmadi, Alireza; Reza Kashyzadeh, Kazem; Azadi, Shahram; Jahani, Kambiz (2020) - Dynamic stress analysis of a bus systems. Application of modal transient dynamics to calculate body fatigue life (No. 2001-01-3087). Keywords: analysis; body; doi; dynamic; fatigue; inertia; life; method; spot; stress; structure; vehicle; welds;  ;  
• Unified methodology for characterisation of global fatigue damage evolution in adhesively bonded joints by Pankaj, Jaiswal; Kumar, Rahul Iyer; De Waele, Wim (2020) - Single lap adhesive joint; Double lap adhesive joint; Fatigue test; Hysteresis. Colombi and Fava [8] evaluated the fatigue performance and stiffness degradation of double lap adhesive joints, steel bonded to CFRP with a 1.1 mm thick epoxy adhesive layer, subjected to fatigue tests at stress ratios equal to 0.1 and 0.4 at a frequency of 12 Hz. Keywords: adhesive; cycles; damage; dlaj; doi; evolution; fatigue; hysteresis; joint; lap; load; specimens; test
• Fatigue Life Simulation and Analysis of Aluminum Alloy Sheet Self-piercing Riveting by Zheng, Qingchun; Wang, Naixin; Zhu, Peihao; Liu, Jingna; Ma, Wenpeng (2020) - The fatigue life prediction model of self-piecing riveting components of aluminum alloy is established and the effects of roughness and residual stress on fatigue life are analyzed by the model. The quantitative relations between fatigue life and three variables (roughness, residual stress and maximum stress) are fitted, and the variation trend of fatigue life with roughness and residual stress is obtained. Keywords: alloy; aluminum; analysis; doi; fatigue; joints; life; riveting; roughness; self; stress
• Improvement of Fatigue Properties of AZ31B Extruded Magnesium Alloy through Forging by Gryguc, Andrew; Shaha, Sugrib Kumar; Behravesh, Seyed Behzad; Jahed, Hamid; Wells, Mary; Williams, Bruce (2020) - Figure 12: The magnified view of SEM micrographs showing morphology of the fatigue fracture surface of the AZ31B extruded (a, b) and forged at temperature of 400° C for the rate of 3.9 mm/min (c, d) in the cracks propagation zone (a, c) and final fracture zone (b, d) as indicated in Fig. 11 with locations 1 & 2. A. Gryguć et alii, Frattura ed Integrità Strutturale, 53 (2020) 152-165; DOI: 10.3221/IGF-ESIS.53.13 163 CONCLUSIONS he tensile and fatigue behavior in the extrusion direction of as-extruded and forged AZ31B magnesium alloy were investigated. Although studies regarding the effect of varying processing parameters on the mechanical properties of forged magnesium are available in literature, they are not numerous. Keywords: alloy; az31b; direction; doi; extruded; fatigue; fig; forging; magnesium; material; texture
• Effect of surface treatment on the fatigue strength of additive manufactured Ti6Al4V alloy by Navarro Pintado, Carlos; Vázquez, Jesús; Domínguez, Jaime; Periñán, Antonio; Herrera García, Marta; Lasagni, Fernando; Bernarding, Simon; Slawik, Sebastian; Mücklich, Frank; Boby, Francisco; Hackel, Lloyd (2020) - Microsoft Word - numero_53_art_26_2826 C. Navarro et alii, Frattura ed Integrità Strutturale, 53 (2020) 337-344; DOI: 10.3221/IGF-ESIS.53.26 337 Focussed on Additive Manufacturring Effect of surface treatment on the fatigue strength of additive manufactured Ti6Al4V alloy Carlos Navarro, Jesús Vázquez, Jaime Domínguez University of Seville, Spain cnp@us.es, jesusvaleo@us.es, jaime@us.es Antonio Periñán, Marta Herrera García, Fernando Lasagni Advanced Center for Aerospace Technologies (CATEC), Seville, Spain aperinan@catec.aero, mherrera@catec.aero, flasagni@catec.aero Simon Bernarding, Sebastian Slawik, Frank Mücklich University of Saarlandes, Germany bernarding.simon@gmail.com, s.slawik@mx.uni-saarland.de, muecke@matsci.uni-sb.de Francisco Boby, Lloyd Hackel Curtiss Wright Surface Technologies, Metal Improvement Company, Seville, Spain Francisco.Boby@cwst.com ABSTRACT. Citation: Navarro, C., Vázquez, J. Domínguez, J., Periñán, A., García, M. H., Lasagni, F., Bernarding, S., Slawik, S., Mücklich, F., Boby, F., Hackel, L., Effect of surface treatment on the fatigue strength of additive manufactured Ti6Al4V alloy , Keywords: effect; fatigue; group; laser; peening; shot; specimens; strength; stress; surface; treatments
• Bi-level Hybrid Uncertainty Quantification in Fatigue Analysis: S-N Curve Approach by Nonato, Raphael Basilio Pires (2020) - Fatigue life analysis based on six sigma robust optimization for pantograph collector head support, Advances in Mechanical Engineering, 8(11), pp. 1-9. Fatigue analysis; Uncertainty quantification; Uncertain fatigue analysis; S-N curve; Hybrid uncertainty quantification; Bi-level Hybrid uncertainty quantification. Keywords: analysis; deterministic; doi; eqn; fatigue; level; life; srqs; stress; type; uiqs; uncertainty
• Fatigue Behavior of Metallic Components Obtained by Topology Optimization for Additive Manufacturing by Fiorentin, Felipe; Oliveira, Bernardo; Pereira, João; Correia, José; de Jesus, Abilio M.P.; Berto, Filippo (2020) - In addition, since residual stresses are intrinsic to every metallic additive manufacturing process, the influence of those stresses will be also analysed. However, this geometrical design may have repercussions in the fatigue strength due to stress concentrations and residual stresses promoted by the thermal effects during the AM process. Keywords: additive; analysis; component; doi; fatigue; fig; load; manufacturing; material; optimization; orientation; process; stress; stresses; topology
• Fatigue loading characteristic for the composite steel-concrete beams by I.Hassanin, Ahmed; Fawzy, Hesham M. ; Elsheikh, Ahmed I. (2020) - Resistance of stud shear connectors to fatigue, J. Constr. [4] Geoff T, P.G. (1997).Incremental slip of stud shear connectors under repeated loading. Keywords: beams; concrete; connectors; fatigue; loading; shear; steel; study
• Numerical analysis and thermal fatigue life prediction of solder layer in a SiC-IGBT power module by Zhang, Dianhao; Huang, Xiao-guang; Cheng, Bin-liang; Zhang, Neng (2020) - It can be seen that the predicted results from the Engelmaier model and creep strain energy density model are almost the same, and the thermal fatigue life from creep strain model is relatively shorter. Shear stress-strain of element E2 at TIM2 solder layer: (a) stress, (b) strain. Keywords: creep; doi; fatigue; igbt; layer; model; power; sic; solder; strain; stress; temperature; tim2
• Influence of different loading paths on the multiaxial fatigue behavior of 2024 aluminum alloy under the same amplitude values of the second invariant of the stress deviator tensor by Yankin, Andrey; Mugatarov, A.I.; Wildemann, V.E. (2020) - All these approaches might be more or less accurate for various materials at different loading paths, therefore it is important to validate multiaxial fatigue models in particular cases. In the article [37], the authors considered multiaxial fatigue models and compared them based on the results of biaxial non- proportional tests with a constant component of the shear and normal loading axes. Keywords: alloy; aluminum; doi; fatigue; loading; multiaxial; stress
• Residual stresses near cold-expanded hole at different stages of high-cycle fatigue by crack compliance data by Eleonsky, Sviatoslav; Pisarev, Vladimir; Zajtsev, Mikhail; Zichenkov , Mikhail; Abdullin, Marat (2021) - The approach provides a difference in residual stress values referred to mandrel entrance and exit surface. Residual SIF values can be accurately converted into residual stress values based on the approach developed in a set of famous works [26–28]. Keywords: doi; fatigue; hole; length; notch; sif; specimen; stress
• Effect of nano-clay addition and heat-treatment on tensile and stress-controlled low-cycle fatigue behaviors of aluminum-silicon alloy: Effect of nano-clay addition and heat-treatment by Azadi, Mohammad; Basiri, Adel; Dadashi, Ali; Winter, G.; Seisenbacher, B.; Grün, F. (2021) - Tensile and fracture behavior of nano/micro TiB2 particle reinforced casting A356 aluminum alloy composites, Mater. The investigation of symmetric and asymmetric stress-controlled LCF behavior of aluminum alloys had been performed during recent years in the literature Keywords: alloys; alsi_n_t6; aluminum; amplitude; composites; doi; effect; fatigue; heat; mater; mean; nano; particles; properties; strain; stress; treatment
• Determining the endurance limit of AISI 4340 steels in terms of different statistical approaches by Çalışkan, Salim; Gürbüz, Rıza (2021) - Nevertheless, prediction of fatigue limit data agreed with observed data sensibly. Similarly, confidence interval for standard deviation needs to be calculated to validate standard deviation below the upper limit of empirical standard deviation coming from fatigue test data with defined confidence level. Keywords: confidence; curve; data; deviation; distribution; doi; fatigue; limit; log; mean; method; standard; stress
• Bending cyclic behavior and scatter-band analysis of aluminum alloys under beneficial and detrimental conditions through high-cycle fatigue regime by Azadi, Mohammad; Aroo, Hanieh (2021) - It should be noted that the expectation of adding nano-clay-particles to aluminum alloys is to increase the hardness, strength, and fatigue lifetime. In Fig. 3, the scatter-band of fatigue data is presented for the aluminum alloy, the nano-composite, and the heat-treated nano-composite, on a logarithmic scale and for different confidence levels. Keywords: aluminum; azadi; corrosion; fatigue; heat; lifetime; nano; stress
• Fatigue strength evaluation of PPGF35 by energy approach during mechanical tests by Risitano, Giacomo (2021) - Fatigue tests of specimens have been monitored with an infrared thermography system. This is a typical situation for composite materials with a plastic matrix; for this reason, fatigue tests are time-consuming for these materials. Keywords: doi; fatigue; materials; method; mpa; risitano; specimens; strength; temperature; tests
• Damage accumulation near the cold-expanded hole due to high-cycle fatigue by crack compliance method by Eleonsky, Sviatoslav; Matvienko , Yuri; Pisarev, Vladimir; Zajtsev, Michael (2021) - The novel destructive method is implemented for quantitative assessment of fatigue damage accumulation in the stress concentration zone accompanied by residual stress due to cold expansion of the through-thickness hole. Information related to fatigue damage accumulation near cold-expanded holes is of considerable importance for reliable lifetime estimation. Keywords: accumulation; damage; displacement; doi; fatigue; hole; notch; parameters; plane; stress
• Novel 2D strain-rate-dependent lamina-based and RVE/phase-based progressive fatigue damage criteria for randomly loaded multi-layer fiber-reinforced composites by Shariyat, M. (2021) - For orthotropic materials with three planes of symmetry parallel to the coordinate planes, this criterion becomes:            2 2 2 11 1 22 2 66 6 12 1 2 1 1 2 22 1F F F F F F (2) where          11 22 66 12 2 12 11 22 1 1 1 1 1 ,          ,           ,          , 1 1 1 ,      2 t c t c t                                                                       Keywords: criteria; damage; fatigue; material; rate; results; strain; stress;  ;  ;  ;  ;  ;  ;  
• Effects of surfaces nanocrystallization induced by shot peening on material properties : a Review by Bagheri Fard, Sara; Guagliano, Mario (2013) - Thermal properties Thermal properties of shot peened surface nanocrystallized materials have also been studied in some experiments [96,97]. SURFACE NANOCRYSTALLIZATION s stated before, the key point of surface nanocrystallization process of a bulk material is to introduce a large amount of defects and/or interfaces into the surface layer so that its microstructure is transformed into nano- sized crystallites while the structure of the coarse-grained matrix remains unchanged without any associated changes in the cross sectional dimensions of the samples [56]. Keywords: fatigue; grain; layer; materials; nanocrystallization; peening; process; properties; sample; science; shot; surface
• Observing the simulation behaviour of Magnesium alloy metal sandwich panel under cyclic loadings by Shamsul Baharin, Muhammad; Abdullah, Shahrum ; Md Nor, Noorsuhada; Muhamad Paudzi, Mohd Khairul Faidzi; Arifin, Azli; Karam Singh, Salvinder Singh (2022) - The σmin used for simulation in Fig.14 is higher than σmin used for simulation in Fig. 12 which cause the reduction of sandwich panel fatigue life as showed in Figs. It is highlighted that modification on the surface of core design could be beneficial to enhance the bonding strength performance of sandwich panels and prevent early delamination under extreme conditions such as constant cyclic loading. Keywords: core; doi; fatigue; fatigue life; life; load; panel; sandwich; sandwich panel; sp-1; sp-2; sp-3; stress
• Detection of Uniaxial Fatigue Stress under Magnetic Flux Leakage Signals using Morlet Wavelet by Firdaus, Syed Muhamad; Arifin, Azli ; Abdullah, Shahrum; Karam Singh, Salvinder Singh; Md Nor, Noorsuhada (2022) - However, the magnetic sensor signal is weak and susceptible to noise, interference, and undesirable magnetic signals from the environment [12]. This paper demonstrates the application of continuous wavelet transform technique for magnetic flux leakage signal generated during a uniaxial fatigue test. Keywords: coefficient; dh(y)/dx; doi; energy; fatigue; flux; frequency; leakage; load; magnetic; signals; stress; time; uts; wavelet
• Evaluation on fatigue behaviour of spot-welded joint under low blow impact treatment by Padzi, Mahfodzah; Ghazali, Farizah Adliza (2022) - Fatigue; Post-weld; Welding; PWIT Citation: Padzi, M. M., Ghazali, F. A., Evaluation on fatigue behaviour of spot- welded joint under low blow impact treatment, Frattura ed Integrità Strutturale, 62 (2022) 271-278. The S-N curve proves specimens that undergo LBIT have higher fatigue lives. Keywords: doi; fatigue; life; specimens; spot; stress; treatment; welding
• Deep Learning algorithm for the assessment of the first damage initiation monitoring the energy release of materials by Milone, Dario; Santonocito, Dario (2022) - Figure 9: a) C45 Expected vs Predicted limit stress (training); b) PE100 Expected vs Predicted limit stress (training). Figure 10: a) S355 Expected vs. Predicted limit stress (test); b) AISI 316L Expected vs. Predicted limit stress (test). Keywords: data; doi; fatigue; limit; material; network; risitano; stress; temperature; test; time; value
• Influence of additional static stresses on biaxial low-cycle fatigue of 2024 aluminum alloy by Yankin, Andrey; Lykova, Anastasia; Mugatarov, Artur; Wildemann, Valeriy; Ilinykh, Artem (2022) - All these approaches are more or less accurate for different materials at various load paths, so it is important to validate multiaxial fatigue models in particular cases. In this paper, a previously developed modification of the Sines model of multiaxial fatigue is reduced to an invariant form. Keywords: aluminum; doi; fatigue; max; mean; model; stress; t t
• High-cycle fatigue strength of a pultruded composite material by Colombo, C.; Guagliano, M.; Vergani, L. (2013) - Delamination; pultruded composites; DGM-XGM failure; fatigue damage. By means of the SEM analysis it was moreover possible to understand how fatigue damage develops in the different layers of materials. Keywords: composite; damage; failure; fatigue; material; sem; specimens; tests
• Description of Fatigue Sensitivity Curves and Transition to Critical States of Polymer Composites by Cumulative Distribution Functions by Staroverov, Oleg; Mugatarov, Artur; Yankin, Andrey; Wildemann, Valeriy (2022) - Fatigue damage model for injection-molded short glass fibre reinforced thermoplastics, Int. Numerical modelling and simulation of fatigue damage in carbon fibre reinforced plastics at different stress ratios, Thin-Walled Structures, 139, pp. Keywords: accumulation; composite; cyclic; damage; distribution; doi; fatigue; model; parameters
• Optimization of S-N curve fitting based on neighborhood rough set reduction with improved firefly algorithm by Li, Yangjinyu; Zou, Li; Zhu, Zhengjie (2023) - Finally, the results of the goodness-of-fit show that the dispersion of fatigue data is reduced, which can effectively improve the prediction accuracy of fatigue life. KEYWORDS. How to further reduce the scatter of fatigue data and improve the accuracy for fatigue life is a significant issue that needs to be solved, which is very important for the application of the method in engineering. Keywords: algorithm; curve; data; doi; fatigue; firefly; life; method; optimization; reduction; set; stress
• Fatigue life investigation of notched TC4 specimens subjected to different patterns of laser shock peening by Iziumova, Anastasia; Maxim Zhelnin; Anastasia Kostina; Aleksei Vshivkov; Elena Gachegova; Oleg Plekhov; Swaroop, S. (2023) - [8] compared LSP with Water Jet Peening (WJP) and Shot Peening (SP) with regard to the microstructure, surface topography, residual stresses, and fatigue properties for gear teeth-like specimens made of case-hardened steel. This method has a number disadvantages such as flat surface of the specimen, measurements only in one point of the surface, selection of suitable strain gauge sizes if specimen is small enough, providing only two components of residual stress and etc. Keywords: doi; fatigue; fig; laser; life; loading; lsp; notch; pattern; peening; results; sample; shock; specimens; stress; surface
• Estimating degradation of strength of neat PEEK and PEEK-CF laminates under cyclic loading by mechanical hysteresis loops by Bogdanov, Alexey; Eremin, Alexander; Burkov, Mikhail; Panin, Sergey; Lyubutin, Pavel (2023) - 1. Neat PEEK samples were fabricated from the “PEEK Victrex 450G” powder (Victrex plc) with an average particle size of 16 µm. Thus, two opposite cases were considered; near creep behavior being characteristic for low-cyclic fatigue of neat PEEK, while PEEK-CF laminates experienced fatigue behavior close to high-cyclic fatigue mode. Keywords: composite; cycles; cyclic; damage; doi; fatigue; fig; load; materials; modulus; peek; strain; strength
• Damage-failure transition in titanium alloy Ti-6Al-4V under dwell fatigue loads by Oborin, Vladimir; Balakhnin, Aleksandr; Naimark, Oleg; Gornostyrev, Yuri; Pushin, Vladimir; Kuranova, Nataliya; Rasposienko, Dimitrii; Svirid, Aleksey; Uksusnikov, Aleksey (2023) - Thus far, the relationship between the specific microstructures and dwell fatigue damage has remained mechanistically uncertain, so that the primary goal of this research is to establish a link between the microtextured regions and the dwell fatigue damage, as well as gain insight into the mechanisms of preferential sub-surface facet nucleation under dwell fatigue loading conditions. This is the time when the rate of fatigue damage at ambient temperature increases dramatically in comparison to the conventional fatigue loading [4- 6]. Keywords: alloy; damage; doi; dwell; dwell fatigue; energy; fatigue; fig; fracture; kinetics; lcf; loading; nucleation; oborin; titanium
• Structural durability assessment of welded offshore K-nodes by different local design concepts by Sonsino, C. M. (2009) - Figure 13: Hot-spot and weld local notch stresses in the critical area of the weld seam. Figure 5: Overview of fatigue design concepts for welded joints. Keywords: fatigue; fig; figure; sonsino; stress
• Fatigue assessment of a FSAE car rear upright by a closed form solution of the critical plane method by Chiocca, Andrea; Sgamma, Michele; Frendo, Francesco; Bucchi, Francesco; Marulo, Giuseppe (2023) - Critical plane based method for multiaxial fatigue analysis of 316 stainless steel, Theor. Evaluation and comparison of critical plane criteria for multiaxial fatigue analysis of ductile and brittle materials, Int. Keywords: analysis; chiocca; component; doi; factor; fatigue; fig; load; method; plane; strain; stress
• Ultrasonic fatigue testing of AISI 304 and 316 stainless steels under environmental and immersion conditions by Torres Duarte, Luis M.; Domínguez Almaraz, Gonzalo Mariano; Venegas Montaño, Hipólito M. (2024) - Stainless steel 316 was immersed in water, while stainless steel 304 was immersed in antifreeze. Ultrasonic fatigue tests, Stainless steels, Immersion, Crack Propagation, Fatigue life. Keywords: behavior; cycles; doi; failure; fatigue; mpa; specimen; steel; temperature; tests
• Uniaxial fatigue study of a natural-based bio-composite material reinforced with fique natural fibers by Chaves Garcia, Maria Camila; Castro Bermudez, Juan Dayal; Pertuz Comas, Alberto David (2024) - It is important to acknowledge that limited research has been conducted on the fatigue behavior of natural fiber fique composites. In response to this challenge, the advancement of natural fiber-reinforced polymeric composites (NFRPCs), also known as natural fiber composites, has gained momentum. Keywords: behavior; composite; doi; epoxy; fatigue; fiber; fig; fique; material; matrix; properties; stiffness; strain; stress
• Comportamento a fatica dei giunti saldati in funzione della densità di energia di deformazione locale: influenza dei campi di tensione singolari e non singolari by Lazzarin, Paolo (2009) - Il volume di controllo è un cilindro di raggio RC0.3 mm e altezza ancora pari a RC. Nei casi piani il volume di controllo diventa un settore circolare di raggio R0, così come rappresentato in Fig.1. Keywords: alla; che; come; con; controllo; cordoni; criterio; deformazione; dei; della; densità; energia; fatica; fatigue; fig; frattura; giunti; lazzarin; medio; modo; nel; non; raggio; saldati; spessore; strutturale; tensione; una; valore; volume
• Shapley additive explanation on machine learning predictions of fatigue lifetimes in piston aluminum alloys under different manufacturing and loading conditions by Azadi, Mohammad; Matin, Mahmood (2024) - This finding can aid in classifying each feature by showcasing the average impact of each feature on fatigue lifetime, as shown in Fig. 7(a), and the logarithm of fatigue lifetimes, as shown in Fig. 7b), serving as the target of the modeling process. This work innovatively investigates the influence of various experimental and manufacturing factors on piston aluminum alloy specimens under rotational bending fatigue tests, utilizing ML techniques to assess their significance and interactions affecting fatigue lifetime values. Keywords: alloys; aluminum; data; doi; fatigue; fatigue lifetime; lifetime; machine; model; modeling; prediction; shap; value; xgboost
• Fatigue behavior of pultruded fiberglass tubes under tension, compression and torsion by Staroverov, Oleg; Mugatarov, Artur; Sivtseva, Anastasia; Strungar, Elena; Wildemann, Valeriy; Elkin, Aleksandr; Sergeichev, Ivan (2024) - Fatigue damage mechanisms and evolution of residual tensile strength in CFRP composites: Stacking sequence effect, Compos. In opposite, the analysis of torsion fatigue tests indicated significant correlation between the maximum stress amplitude and the model parameters. Keywords: composites; compression; damage; degradation; doi; fatigue; figure; stiffness; stress; tension; torsion
• Fatigue life estimation in welded joints under multiaxial loadings by Carpinteri, Andrea; Spagnoli, Andrea; Vantadori, Sabrina (2009) - Mean value and amplitude of normal stress and shear stress The critical plane  passing through a given point P in a solid and the attached orthogonal coordinate system Puvw are considered (Fig.2), where the u-axis belongs to the plane formed by the w-axis (normal to the critical plane) and the Z- http://www.gruppofrattura.it/ http://dx.medra.org/10.3221/IGF-ESIS.09.05&auth=true An. Equation (7) is based on the well-known linear interaction between normal stress amplitude and normal stress mean value (diagram of Goodman). Keywords: carpinteri; criterion; fatigue; joints; life; plane; principal; shear; stress
• Exploring the elastocaloric effect of Shape Memory Alloys for innovative biomedical devices: a review by Costanza, Girolamo; Porroni, Ilaria; Tata, Maria Elisa (2024) - This section explores the advantages and challenges of elastocaloric NiTi devices in several biomedical contexts. Elastocaloric NiTi devices offer promising solutions for temperature control in these systems. Keywords: alloys; applications; cooling; devices; doi; ecm; effect; elastocaloric; fatigue; heat; materials; memory; niti; performance; shape; sma; stability; temperature; transformation
• Effect of Internal Technological Defects and Loading Waveform on Structural Composite Fatigue Life by Lykova, Anastasia; Lobanov, Dmitriy; Pankov, Alexander; Ugolnikov, Mikhail (2024) - In particular, during static tensile tests, specimens with delamination (dry-spot) defects failed in the grip region, whereas those with wrinkling defects failed in the working region along the defect boundary. Fatigue life tests were conducted using an MTS Landmark 370.10 servohydraulic system, with a maximum load of 100 kN and a frequency of 30 Hz, under sine and triangle waveforms, as shown in Fig. Keywords: cfrp; defects; doi; fatigue; fracture; life; material; specimens; spot; tests; wrinkling
• Determination of the geometric parameters of the defects based on the tomographically obtained data and their influence on the fatigue behavior of the S960 with laser cladded protective layers by Doubek, Pavel; Kumpová, Ivana; Malíková, Lucie; Al Khazali, Mohammad Sami; Seitl, Stanislav (2024) - Subsequently, the tested specimens were subjected to the Magnetic Particle inspection according to EN ISO 17638 used for the detection of surface defects in ferromagnetic materials. [11] to which a four different types of surface layers using robotic laser cladding device MLHW-4000 with the diode source are applied [12]. Keywords: defects; doi; doubek; fatigue; fracture; laser; material; ray; s960; sample; steel; surface
• Critical length parameter of HDPE and its use in fatigue lifetime predictions by Kozáková, Kamila; Trávníček, Lukáš; Poduška, Jan; Klusák, Jan (2024) - In this paper, the methodology used for fatigue lifetime prediction is based on knowledge of the stress distribution ahead of the notches. Then these critical distances were used for fatigue lifetime predictions of tested notches, so the predictions could be verified easily with the experimental data. Keywords: crb; distance; fatigue; lifetime; notch; predictions; radius; specimens; stress
• Rolling contact fatigue of AISI 440C TiN coated by plasma based ion implantion and deposition by Gonzalez, Maria Paula; Colombo, Diego; Fernandino, Diego Omar (2025) - The non-hardness reduction of AISI 440C substrates produced by the room temperature deposition also contributes to the good RCF performance of the PBII&D coatings. Rolling contact fatigue of surface coatings - a review, Wear, 253(11-12), pp. Keywords: 440c; aisi; carbides; coating; contact; deposition; doi; fatigue; fig; hardness; rcf; samples; substrate; surface; temperature
• Fatigue design of welded joints using the finite element method and the 2007 ASME Div. 2 Master curve by Marin, T.; Nicoletto, G. (2009) - Welded joints; Structural stress; Fatigue assessment; Finite element analysis. (2) As of now only few studies on multiaxial fatigue and structural stress are found in the literature, [10], so a complete understanding of the correct combination of s and s is yet to be available. Keywords: element; fatigue; fig; figure; finite; joints; line; mesh; stress; toe; weld
• Augmentation method of fatigue data of welded structures based on physics-informed CTGAN by Cao, Xinyu; Zou, Li; Lu, Chen (2025) - Research on fatigue damage model under multi-load effect and life prediction of compressor blade. Fatigue life prediction model based on machine learning models A fatigue data augmentation model for welded structures fused with physical mechanism is developed to target the problem of less fatigue data in machine learning models under two-step loading. Keywords: damage; data; doi; fatigue; fatigue life; joint; learning; life; loading; loss; machine; model; prediction
• Analyzing the Effect of Residual Stresses in the Fatigue Life of High Ultimate-Strength Steel Specimens by Zaidan, Danielle Lopes; Kenedi, Paulo; de Souza, Luis Felipe Guimarães (2025) -  0 0   0                             y t y y i curv y y y y y t y y i y S E y y c y y S y y y y y S E c y y                                               Residual stress, Fatigue, Analytical model. Keywords: c y; cross; fatigue; fig; specimen; stress; y y;  
• Advanced algorithms for early detection of first damage during static tensile tests by Davide D'Andrea; Danilo D'Andrea; Giacomo Risitano; Dario Santonocito (2025) - Since it was used for the first time, it was strictly dependent on the subjectivity of those analysing data, whose experience suggested how to define subsets to obtain limit stress, considering noise linked to measurement devices and material thermal behaviour, which is always different. Figure 9: STM optimal result deriving from comparison between limit stress obtained by Bilinear Model, Regression of Individual Straight Lines and Regression with respect to complete line. Keywords: bilinear; data; determination; doi; d’andrea; fatigue; integrity; limit; method; model; phase; stm; stress; temperature
• A Three points bending ultrasonic fatigue resistance and vickers hardness of Tlalpujahua clay thermally treated by Venegas Montaño, Hipólito Magdiel; Martínez Torres , Pablo Genaro; López Garza , Victor; Torres Duarte, Luis Miguel; Domínguez Almaraz, Gonzalo Mariano (2025) - The second technique utilizes Vickers indentation to measure changes in clay hardness relative to the treatment temperature. These observations are consistent with the increase in Vickers hardness observed at different thermal treatment temperatures. Keywords: clay; doi; fatigue; fig; hardness; porosity; properties; sample; temperature; treatment; vickers
• Fatigue performance of flexible pavements with cement-bound granular material (CBGM) by Budziński, Bartosz; Majer, Stanisław; Lehner, Petr (2025) - The article further demonstrates that for CBGM layers of greater thickness or protected by an aggregate cover, there is a significant fatigue life reserve before the transition to the small block cracking phase occurs. 7 200 0.25 2 500 0.3 500 0.3 C3/4 4 800 0.25 2 000 0.3 400 0.3 Table 2: Stiffness moduli and Poisson's ratios of HBM adopted for the 2014 Catalogue design [7] COMPARISON OF THE SELECTED FATIGUE CRITERIA FOR CBGM LAYERS he fatigue criterion for hydraulically bound layers refers to the number of equivalent single axle loads (ESALs) after which cracking occurs at the bottom of the layer. Keywords: cbgm; cement; cracking; criteria; design; fatigue; layer; life; mpa; pavement; strength
• Fatigue behaviour of high-strength low-alloy steel sheets: influence of loading direction and microstructure on microcrack initiation and growth by Marinelli, María Cecilia; Díaz, Felipe; Bolmaro, Raúl (2025) - Multiaxial low cycle fatigue, Mechanical properties, HSLA steel sheet, Dislocation structures, Microcraks. (a) (b) (c) Figure 3: TEM BF micrograph showing dislocation structure in the as-received condition: (a) dislocation tangles, wall-like dislocation and dislocation-precipitate interactions in ferrite; (b) non-uniform distribution of cementite; (c) uniform distribution of cementite. Keywords: behaviour; cyclic; dislocation; doi; fatigue; ferrite; fig; fracture; grain; hardening; life; pearlite; plastic; samples; steel; strain; δεp
• Numerical and experimental analysis of mechanical and fatigue properties of special shaped 3D printed sample by Juračka, David; Bujdoš, David; Lehner, Petr (2025) - Previous research The research is based on several published studies that have analysed the mechanical properties of 3D printed materials using FFF/FDM technologies [3,8,10]. One such approach is 3D printing. Keywords: analysis; doi; fatigue; material; model; numerical; printing; properties
• ENLO-SED: an innovative method for large-scale Strain Energy Density (SED) estimation in welded joints using structural stresses derived from Element Nodal LOads (ENLO) by Morettini, Giulia; Lucertini, Simone; Cianetti, Filippo (2025) - Welded joints fatigue, SED approach, Element Nodal LOads, Novel ENLO-SED method. The case examined in this paper ( 90 welded joint) is the typical application of SED method, where the nominal geometry is characterized by a  45 weld bead so consequently the angle between the plates and the weld is 135   . Keywords: doi; element; energy; enlo; fatigue; fracture; integrity; joints; mesh; method; model; sed; strain; stress; weld
• Experimental and numerical analyses of stiffness and fatigue properties of a spring element for mounts with tunable stiffness made of C85S+QT sheet steel by Landersheim, Volker; Mathieu, Cedric; Hansmann, Jan; Kaal, William (2025) - The degradation of the springs is particularly noticeable through a drop in spring stiffness. The proposed estimations allow for a quick estimation of stiffness and fatigue strength based on the geometric parameters slider angle, spring arm thickness, spring arm width and notch radius. Keywords: approximation; arm; doi; eqn; fatigue; fig; notch; spacer; spring; spring arm; stiffness; stress; test; thickness
• Very High Cycle Fatigue (VHCF) of notched specimens: a review by Zuliani, Paolo; Boursier Niutta, Carlo; Paolino, Davide Salvatore; Berto, Filippo; Tridello, Andrea (2025) - This aspect can be explained by the fact that in smooth specimens the crack nucleation mechanism changes by passing from HCF to VHCF regime, while in notched specimens there is surface or near surface crack initiation also in the P. Zuliani et alii, Fracture and Structural Integrity, 74 (2025) 385-414; DOI: 10.3221/IGF-ESIS.74.24 388 VHCF regime. The 30C steel was used to test notched specimens with a stress concentration factor Kt=2, while the 15 C-P was used to test smooth specimens. Keywords: authors; cycles; doi; effect; factor; fatigue; fracture; notch; number; ratio; regime; smooth; specimens; stress; surface; vhcf
• Fatigue experimental characterisation of brazed joints in aluminium microchannel heat exchangers by Milan, Federico; Ortolano, Sandro; Gori, Gian Luca; Benasciutti, Denis; Salvati, Enrico (2025) - Figure 10: Δσnom–Life plot for brazed joint fatigue specimens. Study of the microstructure resulting from brazed aluminium materials used in heat exchangers, Mater. Keywords: aluminium; brazing; doi; exchanger; fatigue; geometry; header; heat; joint; materials; specimens; stress; tensile; tube
• Application of the thermography method for determining the fatigue limit of a nickel alloy produced by wire‑arc additive manufacturing by Neulybin, Sergey; Nikhamkin, Michael; Trushnikov, Dmitriy; Solomonov, Danil; Konev, Ivan (2025) - Fatigue limits were determined as described above from the intersection point of bilinear approximations of the two branches of the heating indicator versus stress. Rapid evaluation of fatigue limit on thermographic data analysis, International Journal of Fatigue, 104, pp. Keywords: additive; block; cycles; doi; fatigue; fatigue limit; limit; loading; method; specimen; temperature; thermography; wire
• Fatigue failure of welded connections at orthotropic bridges by Qian, Z.H.; Abruzzese, D. (2009) - Among of these, Eurocode 3 and AASHTO already have some specific guidelines to orthotropic deck bridges. Nowadays, orthotropic deck bridges are very popular in Europe, particular in Germany. Keywords: bridges; connection; deck; diaphragm; fatigue; peening; plate; rib; stress; stresses
• L’importanza del “parametro energetico” temperatura per la caratterizzazione dinamica dei materiali by Risitano, A.; Risitano, G. (2009) - È verosimile pensare che il limite di fatica definito come prima si riferisca alla resistenza all’oscillazione σ0 (rapporto di carico R = –1) . In questa sede si evidenzia un modello di comportamento fisico del materiale durante le prova di trazione che giustifica, in modo semplice, la capacità di risalire, attraverso la conoscenza sperimentale del limite di comportamento termo-elastico, ai classici parametri di resistenza a fatica. Keywords: alla; carico; che; come; componente; con; cui; del; della; fase; fatica; fatigue; fig; limite; materiale; media; nel; più; prima; prova; provino; punto; risitano; rottura; sulla; superficie; tale; temperatura; tensione; trazione; una; valore; zona
• Sulla stima della vita a fatica di giunti saldati soggetti a carichi multiassiali ad ampiezza variabile by Susmel, L.; Tovo, R.; Benasciutti, D. (2009) - Fin dalla metà del secolo scorso un'intensa attività di ricerca si è specificatamente rivolta alla formulazione di criteri di calcolo, basati sull'utilizzo di tensioni nominali, strutturali o locali [1-3], applicabili a giunti saldati soggetti a sollecitazioni multiassiali ad ampiezza costante. 2, è assegnato il piano Δ di normale n , su cui sono individuati i versori a e b , caratterizzati, nel sistema di riferimento Oxyz, dai seguenti coseni direttori:                          )cos( )sin()sin( )cos()sin( n n n n z y Keywords: ampiezza; che; con; curve; della; fatica; fatigue; fig; metodo; piano; sollecitazioni; sperimentali; tensioni; variabile; varianza;  
• Analisi termica per la valutazione del comportamento a fatica di provini soggetti a successive serie di carichi by Risitano, Antonino; Risitano, Giacomo (2013) - E’ stato visto sperimentalmente e dimostrato attraverso modelli teorici che in prove di fatica su acciai con sollecitazione al di sopra del limite di fatica, la temperatura superficiale del provino dopo un prima incremento iniziale (fatica a basso numero di cicli) si mantiene pressoché costante (fatica ad alto numero di cicli) fino a pochi cicli (circa 500) prima della completa rottura (fatica ad altissimo numero di cicli) del provino (Fig. 1). [9], ha permesso di proporre metodi brevi per la determinazione del limite di fatica. Keywords: alla; carichi; carico; che; cicli; con; danno; del; della; di fatica; fatica; fatigue; fig; figura; limite; limite di; materiale; provini; risitano; rottura; serie; sono; temperatura; tensione
• Influence of mean stress on the fatigue strength of ASTM A743 CA6NM alloy steel by Lobato da Silva, B.; de Almeida Ferreira, J. L.; Oliveira, F.; Araújo, J. A. (2013) - Th d smaller sca effect of th STM A743 C hydrogenato acks usually ar ociated to th appens in a levels that a tails and on t omponent af arting from t es are fundam ents are much of the mater entify the mo Stress-life, wh lation that c urale, 14 (2010) gth of e Oliveira, rsitário Darcy mean stress o ine compon ss ratio of - d results it btain its S-N gue life, Goo se of such ru n and Gerb he prediction atter than K he presence o CA6NM. [9] and ASTM e critical value rve, 2 specim served the tes he S-N curves ess levels. Keywords: e+04; fatigue; mean; model; stress
• High-cycle notch sensitivity of alloy steel ASTM A743 CA6NM used in hydrogenator turbine components by Lobato da Silva, B.; de Almeida Ferreira, J. L.; Araújo, José Alexander (2013) - The cy in the stan ed Integrità Stru Table 5: Con imentally the requency of used to determ size and mat too in the sam stimated by S m) Deviation 1.6 1.6 2.2 1.6 rimental param N ius of 8 mm eometric cond results for no e 2: Plot of Sta ius of 3 mm ting results fo n-Lóren equ started from b gth estimate, ition, from s hat experimen erefore, in thi ndard deviatio 203 214 225 236 247 258 270 281 292 303 0 S tr es s le ve l (M P a) utturale, 14 (201 Specimens 8 10 12 15 20 nstants used in fatigue limit 15 Hz with mine the clas terial enduran me table. Lee reco f (%) Uppe .1 .5 .5 .0 fist testing sta study and th fatigue limit f ch radius of 8 The average this case a served that th imental limit th specimen ens from 1 to re sufficiently 6 7 8 number IS.14.04 n correction Keywords: fatigue; limit; method; mpa; notch; radius; results; silva; stress

• Crack propagation in micro-chevron-test samples of direct bonded silicon-silicon wafers by Vogel, K.; Wuensch, D.; Shaporin, A.; Mehner, J.; Billep, D.; Wiemer, M. (2013) - To initiate ment, the spec ro-chevron-sam ll defined cra odulus E and ng YMIN in t the maximu e to be prepa re applying th e wafers in de o specimens, t e the force, tw cimen has to b mples. In addition t ried out in fu n to microsys T. Otto, In: T 307. C. Jia, D. Wu , T. Gessner, r wafer bondi Hiller, K. Ka ence and Eng MEMS and M. Petzold, El Int. Keywords: bonding; force; fracture; stress; wafer
• Numerical modelling of intergranular fracture in polycrystalline materials and grain size effects by Paggi, M.; Wriggers, P. (2013) - Figure 11: Distribution of interface fracture energies for three different average grain sizes. From the modelling point of view, considering the dependency of the grain boundary thickness on the grain size observed in polycrystals, a distribution of interface thicknesses is obtained. Keywords: czm; distribution; fig; fracture; frattura; grain; interface; material; size; stress; thickness
• The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture by Del Piero, Gianpietro; Lancioni, Giovanni; March, Riccardo (2013) - In this communication a diffuse cohesive energy is considered, and fracture is regarded as the extreme stage of the localization of inelastic deformation. Catastrophic fracture may take place in both localized and full-size solutions. NUMERICAL SIMULATIONS ith an appropriate choice of the expression of , the non-local model gives the possibility of describing many experimental situations in which rupture is preceded by more or less extended regimes of inelastic deformation, as well as many intermediate situations between the extreme cases of a totally brittle and a totally ductile response. Keywords: bar; condition; deformation; energy; fracture; model; regime; response; strain
• A theoretical model for predicting the Peak Cutting Force of conical picks by Kuidong, Gao; Changlong, Du; Hongxiang, Jiang; Songyong, Liu (2013) - For these reasons, the vertical fracture mechanics model of rock cutting fragment is established based on the maximum tensile criterion and rock cutting theory in this paper firstly; then, the theoretical model for predicting the PCF of conical pick is I http://dx.medra.org/10.3221/IGF-ESIS.27.06&auth=true http://www.gruppofrattura.it G. Kuidong et alii, Frattura ed Integrità Strutturale, 27 (2014) 43-52; DOI: 10.3221/IGF-ESIS.27.06 44 established based on elastic fracture mechanics theory; finally, the reliability and accuracy of PCF model is verified with experimental date. Figure 4: Laboratory furniture of rock cutting linearly: 1-rock specimen; 2-guideways; 3-clamping device of conical pick; 4-conical pick; 5- advancing hydro-cylinder. Keywords: conical; cutting; force; fracture; fragment; model; pick; rock; sin
• Fracture failure analysis of baseplates in a fluidic amplifier made of WC-11Co cemented carbide by Liu, H.; Yin, K.; Peng, J.M.; Yin, Q.L. (2013) - Fracture analysis; Fluidic amplifier; WC-Co cemented carbide; Numerical simulation; Microstructure. In oil and gas drilling, a number of field tests have proven that liquid jet hammer could increase drilling efficiency by more than 120% in hard formations [8-10]. Keywords: amplifier; analysis; drilling; fracture; hammer; jet; liquid; material; mesh; model; pressure; stress
• Effects of the manufacturing process on fracture behaviour of cast TiAl intermetallic alloys by Brotzu, A.; Felli, F.; Pilone, D. (2013) - Different casting methods have been used for producing TiAl based alloys. Different casting methods such as conventional sand casting, tilt and counter-gravity casting, investment casting, low pressure casting, centrifugal casting, shell mould casting, vacuum arc remelting, electron beam melting, plasma arc melting have been used for producing TiAl based alloys Keywords: alloys; casting; fracture; gas; phase; specimens; temperature; tial
• Bond-slip analysis via a cohesive-zone model simulating damage, friction and interlocking by Serpier, R.; Varricchio, L.; Sacco, E.; Alfano, G. (2014) - [5] Giambanco, G., Rizzo, S., Spallino, R., Numerical analysis of masonry structures via interface models, Comp. [22] Alfano, G., Crisfield, M.A., Finite element interface models for the delamination analysis of laminated composites: mechanical and computational issues, Int. Keywords: bar; concrete; damage; fracture; interface; k k; model; steel
• Dynamic rock fragmentation: thresholds for long runout rock avalanches by Bowman, E.T. (2014) - This paper discusses dynamic rock fragmentation which is thought to play a major role in the high transport mobility of rock avalanches. Recently, the spreading efficiency of rock avalanches has been found to correlate positively with the degree of fragmentation of the deposit [4] – i.e. the change in grain size distribution from the commencement to arrest – indicating that high mobility is linked to dynamic rock fracture. Keywords: avalanches; chalk; fracture; fragmentation; limestone; rate; rock; size; strain
• Improvements in self-consolidating cementitious composites by using micro carbonized aggregates by Ferro, Giuseppe Andrea; Ahmad, Sajjad; Khushnood, Rao Arsalan; Restuccia, Luciana; Tulliani, Jean Marc (2014) - The present research was conducted to enhance the mechanical performance of cement composites by the utilization of micro-sized inert particles. High performance of cement composites can be achieved by good proportioning of the mix quantities i.e. cement, sand, water and mineral or chemical additives. Keywords: cement; composites; figure; fracture; hemp; hurds; inert; particles; strength; toughness
• The notch effect on fracture of polyurethane materials by Voiconi, T.; Negru, R.; Linul, E.; Marsavina, L.; Filipescu, H. (2014) - Also, the maximum load increase with increasing PUR material density, Fig. This paper investigates the fracture properties and notch effect of PUR materials with four different densities. Keywords: fracture; materials; mode; necuron; notch; stress
• Determining fracture energy parameters of concrete from the modified compact tension test by Fernández-Canteli, A.; Castañón, L.; Nieto, B.; Lozano, M.; Holušová, T.; Seitl, S. (2014) - [19] Holušová, T., Seitl, S., Fernández-Canteli, A., Numerical support of experimental compact tension test on concrete cylindric specimens, Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series, No. 1 Vol. XIV, (2014). MODIFIED COMPACT TENSION TEST: CONFIGURATION he modified compact tension test (MCT) solution was initially developed for slide shaped specimens cut off from cylindrical specimens used in standard compression tests, which can be obtained as a drill core from real constructions for evaluating age and conditions of the material. Keywords: bars; concrete; experimental; fracture; load; model; specimen; test
• Role of the microstructure on the mechanical properties of fully pearlitic eutectoid steels by Toribio, J.; González, B.; Matos, J.C.; Ayaso, F.J. (2014) - Pearlitic steel; Heat treatment; Ductility; Fracture surface; Micromechanisms of fracture. INTRODUCTION n pearlitic steel, hardness and yield strength increase with decreasing interlamellar spacing following a Hall-Petch type relationship [1-11]. Keywords: cooling; fracture; furnace; pearlite; pearlitic; steel; strength
• Wedge splitting test method: quantification of influence of glued marble plates by two-parameter fracture mechanics by Seitl, S.; Nieto García, B.; Merta, I. (2014) - [13,14,26,27] a) b) Figure 1: Wedge splitting specimen: a) photo and b) sketch: where the rectangular groove is formed by two marble plates glued on the upper side of the specimen. K and T-stress calibration curves for foam concrete with marble plates forming the rectangular groove on the upper side of WST specimens are presented in [29]. Keywords: concrete; fracture; marble; materials; specimens; stress; values; wedge; wst
• Advanced techniques for estimation of the tensile fracture toughness of adhesive joints by Campilho, R.D.S.G.; Banea, M.D.; da Silva, L.F.M. (2014) - [27], regarding the adherend stiffness influence on the fatigue failure of bonded joints, which proved by Finite Elements that the plastic zone in adhesive joints between steel adherends was consistently higher than identical joints between aluminium adherends during the entire damage uptake process up to crack initiation. When using the Finite Element Method with advanced propagation laws, the tensile (Gnc) and shear (Gsc) fracture toughness of adhesive joints must be determined with accuracy. Keywords: adherends; adhesive; campilho; configuration; curve; fracture; gnc; joints; law; r.d.s.g; value
• Investigation of Mode I fracture toughness of red Verona marble after thermal treatment by Scorza, Daniela; Carpinteri, Andrea; Fortese, Giovanni; Vantadori, Sabrina; Ferretti, Daniele; Brighenti, Roberto (2015) - A wide variety of specimen types and methods to determine Mode I fracture toughness of natural stones are available in the literature and, in this context, the model originally proposed for plain concrete, i.e. the Two-Parameter Model (TPM), is adopted. The effects of thermal treatment on both mechanical and fracture parameters are examined in terms of elastic modulus and fracture toughness, respectively. KEYWORDS. Keywords: fracture; peak; pre; specimens; type
• Fracture toughness of TiAl-Cr-Nb-Mo alloys produced via centrifugal casting by Brotzu, A.; Felli, F.; Pilone, D. (2012) - Fracture toughness tests gave toughness values ranging from 3.5 to 25.7 [13]. One of these novel alloys displays fracture toughness values of 13 at room temperature and Keywords: alloys; fracture; specimen; temperature; toughness; values
• EBSD-assisted fractographic analysis of crack paths in magnesium alloy by Takaya, S.; Uematsu, Y.; Kakiuchi, T. (2015) - Figure 3: SEM micrographs showing SCC fracture surface tested under the cathodic potential of -1.4V; (a) Macroscopic appearance, (b) Magnified view showing parallel lines, (c) Classification of the areas with parallel lines. Consequently, electron back scattered diffraction (EBSD) technique was applied on the fracture surface, and the formation mechanism of parallel lines was investigated. Keywords: fcp; fracture; lines; slip
• Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method by Pawelek, A.; Piatkowski, A.; Wajda, W.; Skuza, W.; Tarasek, A.; Ozgowicz, W.; Grzegorczyk, B; Ranachowski, Z.; Kúdela Jr, S.; Kúdela, S. (2015) - The amplitude and duration of the AE event was measured via analog to the digital acquisition system what enabled the calculation of the energy E of AE events using the approximate formula, E = 0.5 v2max Δt, where νmax was the maximum value of AE signal in the course of the event, and Δt was its duration. They show that the plastic instabilities, related to the PL effect, twinning and/or shear band are correlated with the generation of AE events, and affect the final form of fracture. Keywords: alloys; doi; fracture; mg4li5al; pawełek; temperature; tensile
• Crack initiation and fracture features of Fe–Co–B–Si–Nb bulk metallic glass during compression by Lesz, S.; Januszka, A.; Griner, S.; Nowosielski, R. (2015) - Fracture morphology of rods after compressive fracture has been different on the cross section. Fracture morphology of rods has been different on the cross section. Keywords: doi; fracture; morphology; rods; strain; surface; vein
• A numerical study of two different specimen fixtures for the modified compact tension test – their influence on concrete fracture parameters by Holušová, T.; Cifuentes, H.; Fernández-Canteli, A.; Seit, S (2015) - [12] Holušová, T., Seitl, S., Fernández-Canteli, A., Modified compact tension test: The influence of the steel bars position. MODIFIED COMPACT TENSION SPECIMENS s mentioned above, the geometry of MCT test specimens is derived from that of the original standard compact tension test specimen. Keywords: bars; concrete; energy; fracture; numerical; specimen; steel; tension; test
• Short review: Potential impact of delamination cracks on fracture toughness of structural materials by Arnoult, X.C.; Ružicková, M.; Kunzová, K.; Materna, A. (2015) - At the head of delamination crack, the stress component yy is about 1.4 ys in the absence of delamination cracks and increases to about 2.1 ys in the presence of delamination cracks. Microsoft Word - numero_35_art_57 X.C. Arnoult et alii, Frattura ed Integrità Strutturale, 35 (2016) 509-522; DOI: 10.3221/IGF-ESIS.35.57 509 Short review: Potential impact of delamination cracks on fracture toughness of structural materials X.C. Arnoult, M. Růžičková, K. Kunzová Centrum Výzkumu Řež s. r. o., Husinec-Řež, Czech Republic Xavier.Arnoult@cvrez.cz A. Materna Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Prague, Czech Republic ABSTRACT. Keywords: cracks; delamination; delamination cracks; ferrite; figure; fracture; orientation; specimens; steel; surface; temperature; toughness; ° c
• Modeling of edge cracks interaction by Petrova, V.; Schmauder, S.; Shashkin, A. (2016) - In previous papers of the authors [7-10] the fracture of FGM/homogeneous bimaterials (an infinite medium) under thermal and mechanical loadings were investigated, besides, in [11] some results for edge cracks in FGM/homogeneous structures (a semi-infinite medium) were obtained in the frame of the approach used in [7-10]. Before presenting the results for more complicated cases of non- homogeneous materials (FGMs, bimaterials, and others), modeling of the interaction of edge cracks should be done for a homogeneous medium. Keywords: angles; cracks; distances; edge; edge cracks; fig; fracture; inclination; ° ≤; ≤120
• Methodological developments in the field of structural integrity analyses of large scale reactor pressure vessels in Hungary by Fekete, Tamás (2016) - Figure 6: Basic evaluation scheme for PTS Structural Integrity analysis, according to [43]. T. Fekete, Frattura ed Integrità Strutturale, 36 (2016) 78-98; DOI: 10.3221/IGF-ESIS.36.09 87 METHODOLOGY OF PTS STRUCTURAL INTEGRITY ANALYSES OF VVER-440 RPVS Overview of the Model of PTS Structural Integrity Analyses brief overview of the underlying physical problems of the PTS problem is given next, identifying the core problem of PTS Structural Integrity assessments as the Structural Mechanics problem. Keywords: ageing; analyses; behavior; calculations; concept; energy; fekete; fracture; graph; integrity; level; material; mechanics; model; neutron; parameters; power; pressure; problem; pts; rpv; system; theory; time
• Effects of hydrogen induced delay fracture on high-strength steel plate of automobile and the improvement by Liu, Fengzhu; Zhao, Yu (2016) - Recently, accidents induced by hydrogen induced delay fracture of high-strength steels happen frequently. When the strength of steel is over 1200 MPa, the steel would be highly sensitive to hydrogen induced delay fracture Keywords: content; delay; fracture; hydrogen; materials; samples; state; steel; strength; temperature
• On adaptive refinements in discrete probabilistic fracture models by Eliáš, J. (2016) - The goal of this work is to extend it for probabilistic discrete models. Adaptivity; Discrete model; Probability; Random field. Keywords: concrete; discrete; discretization; doi; eliáš; field; fracture; model; refinement
• Selecting the objective function during the inverse identification of the parameters of a material model of concrete by Hokes, F.; Kala, J. (2016) -    σ κ σ κ (1) with the elliptic function r(θ,e) developed by Klisinsky [27] on the basis of Willam and Warnke´s findings [5] and where Ω(σ,κ) is a hardening/softening function with a work-hardening law and A, B, C, D are model parameters containing basic mechanico-physical properties of concrete (uniaxial compressive strength fc, uniaxial tensile strength ft and biaxial compressive strength fb) whose form is given by the following relationships: b t t b c f f A f f f 2 1 1 1 6          (2) [2] Hokes, F., The current state-of-the-art in the field of material models of concrete and other cementitious composites, Applied Mechanics and Materials, 729 (2015) 134-139. Keywords: concrete; doi; fracture; function; identification; material; model; nonlinear; optimization; parameters; rmse; values
• From test data to FE code: a straightforward strategy for modelling the structural bonding interface by Lepore, M. A.; Perrella, M. (2016) - The vertex, corresponding to the ending point of linear elastic section, represents the starting point of damage process. [10] Sørensen B.F., Jacobsen T.K., Determination of cohesive laws by the J integral approach, Engineering Fracture Mechanics, 70 (2003) 1841-1858. Keywords: damage; fracture; interface; loading; mode; separation; traction
• Experimental investigation on fracture toughness of Al6061–graphite by using Circumferential Notched Tensile Specimens by Doddamani, Saleemsab; Kaleemulla, Mohamed (2016) - Tab. 2 shows the comparison of fracture toughness of aluminium silicon carbide with aluminium graphite. Aluminium graphite composites for various compositions are prepared by using stir casting method Keywords: al6061; aluminium; cnt; composites; fracture; graphite; specimens; tensile; toughness; weight
• Acoustic emissions and electric signal recordings, when cement mortar beams are subjected to three-point bending under various loading protocols by Kyriazopoulos, A. (2017) - When Ib-values progressively decrease, the PSC signals show intense increase, indicating that PSC emissions are mainly attributed to crack formation and propagation. In the same figure the corresponding variation of PSC signals is also presented. Keywords: cement; electric; experiments; failure; fracture; load; loading; psc; value
• Multiscale approach to description of deformation and fracture of brittle media with hierarchical porous structure on the basis of movable cellular automaton method by Konovalenko, Ig. S.; Smolin,, A. Yu.; Psakhie, S. G. (2013) - At the final third stage, qualitative and quantitative verification of the developed model at the macroscale was made including comparison of simulation and experimental data. DETERMINING THE REPRESENTATIVE VOLUME OF THE MICROSCALE AND THE MACROSCALE EFFECTIVE RESPONSE FUNCTION t the microscale of the proposed model, the representative volume is determined by analyzing the convergence of elastic and strength characteristics of porous model specimens with an increase in their dimension. An approach to multiscale description of deformation and fracture of brittle porous materials on the basis of movable cellular automaton method was proposed. Keywords: fracture; loading; material; model; size; specimens
• Dependence of mechanical characteristics from composition and structure and optimization of mechanical fracture energy of polymer composite material based on high-molecular rubbers by Nurullaev, E.; Ermilov, A. S.; Lyubimova, N. Yu. (2017) - i m i                   (2) where:    , , ch r m – vectors of cross-linking mole concentration, polymer volume fraction in the binder and effective extent of volume filling, respectively; φsw– plasticizer volume fraction, coherent with polymer volume fraction (φm) as ratio   ( ) 1r sw ; In – variety of indexes for composition; n –quantity of composition calculation types.  Mcch , where  is polymer density, Mc – average internodal molecular weight of the polymer binder; φr =1- φsw – polymer volume fraction in the composite binder, sw – plasticizer volume fraction in the binder; R – universal gas constant; T∞ – equilibrium temperature, at which concentration of “physical” (intermolecular) bonds (νph) is negligible; Tg – glass transition temperature of the polymer binder; T – sample test temperature (of numerical experiment);    1 a – velocity shift coefficient,    1 a = 1 at standard relative extension rate    1, c accepted for science and industry; φ – filler volume fraction; φm – maximum filler volume fraction, depending on fractional composition, particle shape and physicochemical interaction on the filler – binder interface. Keywords: binder; composite; experiment; filler; fraction; fracture; plasticizer; polymer; silica; temperature; volume
• Fracture toughness investigations of Al6061-Graphite particulate composite using compact specimens by Doddamani, Saleemsab; Kaleemulla, Mohamed (2017) - The objective of this research work is to study the fracture behavior of Al6061 with graphite particulate composite produced by the stir casting technique. [5] Doddamani, S., Kaleemulla, M., Begum, Y., Mechanical properties of aluminium–graphite particulate composites, International Journal of Engineering Research & Technology (IJERT), NCERAME, (2015) 119-122. Keywords: al6061; aluminium; composites; fracture; graphite; load; matrix; particulate; specimens; toughness
• Acoustic Emissions versus Pressure Stimulated Currents during bending of restored marble epistyles: Preliminary results by Kourkoulis, Stavros K.; Dakanali, Ioanna; Pasiou, Ermioni D.; Stavrakas, Ilias; Triantis, Dimos (2017) - Microsoft Word - numero_41_art_64.docx S. K. Kourkoulis et alii, Frattura ed Integrità Strutturale, 41 (2017) 536-551; DOI: 10.3221/IGF-ESIS.41.64 536 Acoustic Emissions versus Pressure Stimulated Currents during bending of restored marble epistyles: Preliminary results Stavros K. Kourkoulis, Ioanna Dakanali, Ermioni D. Pasiou National Technical University of Athens, School of Applied Mathematical and Physical Sciences, Department of Mechanics, 5 Heroes of Polytechnion Avenue, Theocaris Bld., Zografou Campus, 157 73 Athens, Citation: Kourkoulis, S.K., Dakanali, I., Pa- siou, E.D., Stavrakas, I., Triantis, D., Acoustic Emissions versus Pressure Stimulated Currents during bending of restored marble epistyles: Preliminary results, Frattura ed Integrità Strutturale, 41 (2017) 536-551. Keywords: bars; data; epistyle; failure; fault; fracture; fragments; kourkoulis; load; marble; monuments; psc; technique; time; value; variation
• Evaluation of mixed mode I/II fracture toughness of C 50/60 from Brazilian disc test by Seitl, Stanislav; Miarka, Petr (2017) - The cost of reshaping cylinder into rectangular is expensive and not very efficient, therefore it is very effective to use Brazilian disc test specimen with central notch to obtain mixed mode fracture parameters. The contribution deals with numerical support for Brazilian disc test to obtain calibration curves for mode I and mode II, evaluation of experimental results and compare them with data adapted from literature. Keywords: brazilian; concrete; disc; doi; fracture; mode; specimen; test
• Temporal peculiarities of brittle fracture of rocks and concrete by Petrov, Y.; Smirnov, I.; Evstifeev, A.; Selyutina, N. (2013) - Such substitution effect of material strength at different strain rates is studied in this paper. It is shown that load-carrying capacity of materials and the substitution effect of material strength in a wide range of loading rates can be predicted by the incubation time criterion. KEYWORDS. Keywords: concrete; fracture; incubation; loading; material; rate; strength; stress; time
• Macroscopic criteria for the deformation and fracture of iron based alloys by Orlova, Dina V.; Lunev, Alexey G.; Danilova, Lidiya V.; Zuev, Lev B. (2017) - Development of localized plastic deformation at the pre-fracture stage n <0.5 Fig. In terms of self-organization, there is the autowave collapse of localized plastic deformation [21]. Keywords: deformation; flow; fracture; localization; materials; plastic; plasticity; pre; stage; steel; strain; time; velocity
• Investigation of mechanical properties of AlSi3Cr alloy by Tocci, Marialaura; Pola, Annalisa; Montesano, Lorenzo; La Vecchia, G. Marina; Merlin, Mattia; Garagnani, Gian Luca (2017) - Among Al alloys, Al-Si-Mg alloys are the most used for automotive castings production [2,3] because of their excellent castability, good corrosion resistance, high elongation and significant strength. The studied alloy is characterized by the presence of Cr and Mn in order to modify the morphology of intermetallic particles and improve material properties. Keywords: alloy; alsi3cr; fig; fracture; heat; impact; particles; properties; strength; tensile; treatment
• 15-15Ti(Si) austenitic steel: creep behaviour in hostile environment by Strafella, Alessandra; Coglitore, Antonino; Fabbri, Paride; Salernitano, Elena (2017) - Even for specimen tested in lead, morphological features of fracture surface was analyzed by Scanning Electron Microscopy (Fig. 15), but a chemical polishing was necessary to differentiate steel surface fracture from eventual lead residues and to reveal the fracture mode. The comparison between the specimen tested in air and in lead revealed a different fracture mode: mixed cup- cone/transgranular for creep test in air, while intergranular for creep test in lead. Keywords: air; creep; fig; fracture; lead; mode; mpa; specimen; steel; strain; stress; time
• The effect of loading rate on fracture energy of asphalt mixture at intermediate temperatures and under different loading modes by Aliha, M.R.M.; Fakhri, M.; Haghighat Kharrazi, E.; Berto, F. (2017) - Citation: Fakhri, M., Haghighat Kharrazi, E., Aliha, M.R.M., Berto, F., The effect of loading rate on asphalt mixture fracture energy at intermediate temperatures under different loading modes, Frattura ed Integrità Strutturale, 43 (2018) 113-132. Similar to two other studied modes (pure mode I and pure mode II), the trend of mixed mode fracture energy change of AC specimens with different void contents, is incremental for increasing loading rates at intermediate temperature as shown in Fig. Keywords: aggregate; air; asphalt; asphalt mixtures; effect; fracture; fracture energy; ii loading; loading; loading condition; loading rate; mixtures; mode; rates; temperature; void; ° c
• Notiziario n. 18 - Luglio 2007 by Frattura, Gruppo Italiano (2013) - Editoriale del Presidente IGF; 2) Cariche sociali biennio 2005-2007; 3) Verbale dell’Assemblea Annuale dei Soci 2006; 4) Il Consiglio di Presidenza approva il verbale. Keywords: alla; all’o.d.g; attività; beretta; che; committee; conference; consiglio; convegno; dei; del; della; esis; fracture; frattura; gruppo; iacoviello; igf; international; italiano; mail; milano; nazionale; politecnico; presidente; professor; punto; rivista; soci; una; università
• Effect of inter-cluster interference on fracture morphology in multi-cluster staged fracturing for shale reservoir by Li, Qingchao; Cheng, Yuanfang; Zhou, Dongxian; Li, Qiang; Ansari, Ubedullah (2018) - Therefore, by increasing the injection rate of the fracturing fluid, it is possible to increase both the width and the half-length of fracturing fractures, so more volume of the reservoir can be stimulated. Although relevant studies have shown that increasing the design density of perforation is an effective way to improve the productivity of shale gas, an increase in the number of hydraulic fractures will affect the productivity increase of a single fracture. Keywords: cluster; cluster spacing; fluid; fracture; fracturing; fracturing fluid; fracturing section; hydraulic; interference; propagation; spacing
• Investigating the contribution of geometrical parameters and immersion time on fracture toughness of jute fabric composites using statistical techniques by K N, Dr. Bharath; Manjunatha, G. B. (2018) - The percentage of contribution of the thickness of 71.57% and an a/w ratio of 21.39% of load carrying capacity, a/w ratio of 74.5% and Thickness of 35.1% on fracture toughness in ENT specimen. Microsoft Word - numero_46_art_2 G. B. Manjunatha et alii, Frattura ed Integrità Strutturale, 46 (2018) 14-24; DOI: 10.3221/IGF-ESIS.46.02 14 Developments in the fracture and fatigue assessment of materials and structures Investigating the contribution of geometrical parameters and immersion time on fracture toughness of jute fabric composites using statistical techniques G. B. Manjunatha Department of mechanical engineering, G M Institute of technology, Karnataka, India, Manjugb4444@gmail.com, https://orcid.org/0000-0001-8942-8887 K. N. Bharath Department of mechanical engineering, G M Institute of technology, Karnataka, India, kn.bharath@gmail.com, https://orcid.org/0000-0003-1004-099X ABSTRACT. Keywords: capacity; composite; doi; effect; fracture; immersion; load; test; thickness; time; toughness
• Modification of the Bonora Damage Model for shear failure by Bonora, Nicola; Testa, Gabriel; Ruggiero, Andrew; Iannitti, Gianluca; Gentile, Domenico (2018) - Eqn. (30) can be used to predict the regime of stress triaxiality where the material would exhibit the minimum ductility because of the maximum contribution of shear damage. In particular, it was found that, according to the model solution, shear damage may play a role also for high stress triaxiality range (1>T>1/3). Keywords: damage; ductile; failure; fracture; material; model; shear; state; strain; stress; triaxiality
• Numerical simulation of self-piercing riveting process (SRP) using continuum damage mechanics modelling by Bonora, Nicola; Testa, Gabriel; Iannitti, Gianluca; Ruggiero, Andrew; Gentile, Domenico (2018) - Here, , Dcr, th, f, f, , k are the material damage parameters: th is the plastic strain threshold under uniaxial state of stress at which damage process is initiated, f is the failure strain under constant stress triaxiality equal to 1/3,  is the damage exponent that defines the shape of damage evolution law for NAG,  and k are the damage exponents for shear controlled damage contribution, and f is the critical strain for pure shear. Damage parameters - th 0.098 f 3.11 Dcr 0.1  0.3  0.0 f 0.105  0.10 Table 2: Summary of damage model parameters for DP600. Keywords: bonora; damage; dp600; fracture; materials; piercing; process; rivet; shear; sheet; stress; testa
• Micro failure analysis of adhesively bonded joints enhanced with natural cork particles: Impact of overlap length and particles volume fraction by Akhavan-Safar, Alireza; Barbosa, Ana Queirós; da Silva, Lucas Filipe Martins; Ayatollahi, Majid Reza (2018) - Adding cork particles to epoxies as a toughening method has been considered in some works [8, 9]. [8] studied the effect of size and volume fraction of cork particles on the impact toughness of adhesive bonding. Keywords: adhesive; cork; fig; fraction; fracture; micro; particles; specimens; volume
• Comparison of tensile strength and fracture toughness under mode I and II loading of co-cured and co-bonded CFRP joints by Pirondi, Alessandro; Moroni, Fabrizio; Pernechele, Chiara; Gaita, Arturo; Vescovi, Luca (2018) - Figure 12: Example of force vs. opening behavior and fracture surface of co-cured CFRP ENF tests. F. Moroni et alii, Frattura ed Integrità Strutturale, 47 (2019) 294-302; DOI: 10.3221/IGF-ESIS.47.22 299 An example of force vs. opening behavior and fracture surface of co-cured DCB test is shown in Fig. Keywords: adhesive; cfrp; composite; cured; fracture; joints; mode; tests; traz
• Elastoplastic and fracture behaviour of semi-crystalline polymers under multiaxial stress states by Manaia, Joao Pedro; Jesus, Abílio M.P.; Pires, Francisco A. (2018) - Qualitative SEM observations of HDPE fracture surfaces at several magnifications for flat notched specimens, R=5 and R=30, show the formation of an oriented texture of fibrous surface at the centre with a number of longer fibrils. HDPE fracture surfaces at RT and 50 °C have the same geometric patterns, however at 50 °C and at near surface appears a large number of microfibrils, indicating a continued plastically deformation as decohesion of crazing occurred. Keywords: crazing; doi; fracture; fracture surface; hdpe; loading; specimens; speed; stress; surface; temperature; triaxiality; voids; ° c
• Limit load based evaluation of plastic η factor for C(T) specimen with a mismatched weld by Nikhil, R; Krishnan, S A; Sasikala, G; Moitra, A (2019) - For a given load line displacement, the spread of yield contour is attributed to M and h, in case of specimen with 2 R. Nikhil et alii, Frattura ed Integrità Strutturale, 48 (2019) 523-529; DOI: 10.3221/IGF-ESIS.48.50 527 M=1.6 and h=4 mm, the yield contour crosses the interface boundary and spreads to base material to a larger area compared to specimen with M=2.2 and h=16 mm. RESULTS AND DISCUSSION ypical PL vs. A plot for M=1.6, h/W=0.08 and M=2.2, h/W=0.32 is shown in Figs. Limit load based evaluation of plastic η factor for C(T) specimen with a mismatched weld R. Nikhil, S.A. Krishnan, G. Sasikala, A. Moitra Materials development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu, India rnikhil@igcar.gov.in, sakrish@igcar.gov.in, gsasi@igcar.gov.in, moitra@igcar.gov.in ABSTRACT. Keywords: c(t; doi; fracture; load; plastic; values; weld
• Coupled identification of the hardening behavior laws and Gurson–Tvergaard–Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen by Hadj Miloud, Mohamed; Zidane, Ibrahim; Mendas, Mohammed (2019) - In the literature, there are consistent methods to determine GTN model parameters, but with a pre-defined hardening laws i.e. without identification of hardening laws in the same processes of GTN parameters determination. Parameters identification procedure Generally, the determination of GTN model parameters usually consists of a phenomenological procedure which requires a hybrid methodology of comparison between experimental data and numerical results. Keywords: damage; doi; ductile; fig; fracture; gtn; hardening; identification; laws; material; model; numerical; parameters; results; specimen; test
• Numerical model of fracture growth in hydraulic re-fracturing by Smetannikov, Oleg Yurievich; Kashnikov, Yuriy Aleksandrovich; Ashikhmin, Sergey Gennadievich; Kukhtinskiy, Artem Eduardovich (2019) - As is evident from the plots, consideration of incremental stresses caused by opening of primary fracture leads to a growth of horizontal compressive stresses. Microsoft Word - numero_49_art_16_2454 O. Y. Smetannikov et alii, Frattura ed Integrità Strutturale, 49 (2019) 140-155; DOI: 10.3221/IGF-ESIS.49.16 140 Focused on Russian mechanics contributions for Structural Integrity Numerical model of fracture growth in hydraulic re-fracturing Oleg Yurievich Smetannikov, Yuriy Aleksandrovich Kashnikov, Sergey Gennadievich Ashikhmin, Artem Eduardovich Kukhtinskiy Perm National Research Polytechnic University, 614990, Komsomolskiy av, 29, Perm, Russia sou2009@mail.ru, geotech@pstu.ru, a_s_g_perm@mail.ru, artyom@pstu.ru ABSTRACT. Keywords: direction; doi; fig; fracture; fracture opening; growth; horizontal; mpa; oil; opening; pressure; primary; rock; stress; stresses
• Computational multi-scale analysis of simultaneous processes of delamination and damage accumulation in laminated composites by Tashkinov, Mikhail; Ershova, Daria; Shalimov, Aleksandr (2019) - The assessment of plies damage is based on two criteria: a multicomponent criterion, which uses the simplest fracture indicators for various components of the stress tensor, and more complex Hashin criterion [12], taking into account the analysis of local microstructural fields. The results show that in both cases the propagation of delamination and the accumulation of damage processes are not the same in different plies. Keywords: composite; contact; criterion; damage; delamination; doi; failure; fracture; material; matrix; model; plies; ply
• Experimental Research on Fracture Behavior of Concrete after High Temperature by Qiu, Peng (2019) - Based on the double K fracture model, the fracture properties of C70 strength grade concrete after being processed by high temperature of 25 °C ~ 800 °C were studied by three-point bending beam test. The change rules of fracture toughness KIC and fracture energy under different temperatures after being processed by high temperature were analyzed. Keywords: concrete; curve; energy; fracture; fracture energy; ick; load; specimens; strength; temperature; test; toughness
• Stress corrosion behavior of X80 pipeline steel in natural seawater with different dissolved oxygen by Huang, Xiaoguang; Han, Zhongying (2019) - Stress corrosion slow strain rate tensile tests of the X80 steel in the natural seawater are carried out to study the effect of dissolved oxygen (DO) on the sensitivity of stress corrosion. Stress corrosion; Dissolved oxygen; Sensitivity; Stress concentration; Anodic dissolution. Keywords: corrosion; doi; fracture; pipeline; scc; seawater; steel; stress; stress corrosion; x80
• Fracture properties of green mortars with recycled sand by Restuccia, Luciana (2019) - From the analysis of the mechanical characterization of specimens, it is possible to state that recycled sand could represent a new resource for green and sustainable mortars. Citation: Restuccia, L., Fracture properties of green mortars with recycled sand, Frattura ed Integrità Strutturale, 49 (2019) 676-689. Keywords: aggregates; cement; concrete; doi; fracture; mortars; properties; rsw; sand; series; standard
• Algorithms for calculation damage processes by Nikitin, Aleksandr Dmitrievich; Burago, Nikolay G.; Nikitin, Ilia S.; Stratula, Boris A. (2019) - The softening or, more generally, the destruction is considered as the loss of the ability of the material to resist elastic deformation, expressed in a decrease in the values of elastic modules and yield strength due to breaking of elastic bonds or, equivalently, due to an increase in the N. Burago et alii, Frattura ed Integrità Strutturale, 49 (2019) 212-224; DOI: 10.3221/IGF-ESIS.49.22 218 number of microcracks per unit volume. Microsoft Word - numero_49_art_22_2485 N. Burago et alii, Frattura ed Integrità Strutturale, 49 (2019) 212-224; DOI: 10.3221/IGF-ESIS.49.22 212 Focused on Russian mechanics contributions for Structural Integrity Algorithms for calculation damage processes Nikolay G. Burago Ishlinsky Institute for problems in mechanics of the RAS, Moscow, Russia burago@ipmnet.ru, http://orcid.org/0000-0002-1806-9386 Ilia S. Nikitin, Alexander D. Nikitin, Boris A. Stratula Institute of Computer Aided Design of RAS, Moscow, Russia i_nikitin@list.ru, http://orcid.org/0000-0003-3499-6910 nikitin_alex@bk.ru, http://orcid.org/0000-0002-2916-758X stratula@matway.net ABSTRACT. Keywords: damage; deformation; destruction; fracture; material; plastic; solution; t t
• Experimental fracture resistance study for cracked bovine femur bone samples by Aliha, M.R.M.; Ghazi, Hussein; Ataei, Farkhondeh (2019) - doi: 10.5267/j.esm.2013.10.001 [30] Mirsayar, M. M., Berto, F., Aliha, M. R. M., & Park, P. (2016). DOI: 10.1016/j.carbon.2008.05.008 [36] Ayatollahi, M. R., Aliha, M. R. M., & Hassani, M. M. (2006). Keywords: aliha; bone; bovine; doi; femur; fracture; fracture toughness; m. r.; materials; mode; toughness
• Using a cohesive zone modeling to predict the compressive and tensile behavior on the failure load of single lap bonded joint by Benamar, Badr; Mokhtari, Mohamed; Madani, Kouider; Benzaama, Habib (2019) - Citation: Benamar, B., Mokhtari, M., Madani, K., Banzaama, H., Using a cohesive zone modeling to predict the compressive and tensile behavior on the failure load of single lap bonded joint, Frattura ed Integrità Strutturale, 50 (2019) 112-125. Effect of tapered geometry on the failure load In single lap bonded joints, the adhesive works more at the levels of these extremities, however the covering medium remains almost inactive, hence the idea of introducing a so-called tapered geometric modification in order to make it work more easily in all its surface. Keywords: adhesive; compressive; doi; effect; failure; fracture; joint; lap; load; mode; properties; strength; tensile
• A SEM-X-Ray assisted experimental approach for the determination of mechanical and thermal load – induced damage in MMCs by Kytopoulos, Victor; Sideridis, Emilios; Venetis, John; Riga, Chrysoula; Altzoumailis, Alexandros (2019) - However, very often micro-cracks and pores, which constitute basic material damage may not be detected or measured by sonic and other non-destructive techniques. Thus, one can argue that the composite material with large differences between the components (SiC and matrix) con- cerning the tensile moduli and ductility, are more prone to thermal shock damage. Keywords: damage; electron; fracture; integrity; material; matrix; micro; mmc; number; process; rate; ray; shock; surface
• Comparative experimental study of the mechanical and fracture properties of Portland limestone and Corsehill sandstone by Marinelli, Aikaterini; Stewart, Matthew (2019) - The further objective of this research was to examine the effect that test specimen size and shape have on several key properties of Portland limestone, including deflection at mid-span at peak load, CMOD at peak load, flexural strength and, in particular, fracture energy. For the span/depth ratio of 5/2, clearly larger values of fracture energy were recorded, indicating the dependence of fracture energy on test specimen size and geometry as supported by other studies [22]. Keywords: corsehill; depth; energy; fracture; length; limestone; load; notch; portland; sandstone; size; span; specimens; strength; tests
• The use of acoustic emissions technique in the monitoring of fracturing in concrete using soundless chemical demolition agent by Saltas, Vassilios; Peraki, Despoina; Vallianatos, Filippos (2019) - A subsequent characteristic decrease of IT is observed at recording time 𝑡 43772 𝑠𝑒𝑐, i.e. after 154 sec of the cracks’ initiation (refer to Fig.8b)]. al iz ed c um ul at iv e di st rib ut io n, ( P > ) inter-event time, (s) 10-4 10-3 10-2 10-1 100 101 102 103 10-3 10-2 10-1 100 data points curve fitting (R2 = 0.996)  = 0.0482(3) Keywords: agent; concrete; cracking; cracks; doi; fracture; fracturing; hits; monitoring; process; rock; specimen; time
• Fracture precursor phenomena in marble specimens under uniaxial compression by means of Acoustic Emission data by Triantis, Dimos; Kourkoulis, Stavros (2019) - The values of the parameter A and the time constant τ of Eq.(3), as obtained by means of proper curve fitting, are equal to A=128.7 s-1, τ=0.98 s for stage B and A=141.6 s-1, τ=1.23 s, for stage D. As it is expected, the highest value of the time constant τ is observed in stage D due to the considerably increased acoustic activity that is recorded in this stage (recall that, after a while, fracture of the specimen occurred). In stage D, i.e., under constant stress of 63.5 MPa, the strain is increasing, at rates much higher compared to those of stage B. Keywords: acoustic; fracture; function; hits; mode; stage; stage b; stress; time; value
• Scaling Geological Fracture Network from a Micro to a Macro Scale by Basirat, Rouhollah; Goshtasbi, Kamran; Ahmadi, Morteza (2019) - Fractal characterization of fracture networks: An improved box-counting technique, J. Geophys. Scaling rules in rock fracture and possible applications for earthquake prediction. Keywords: core; dimension; doi; field; formation; fractal; fracture; image; region; samples; scale; scan
• The hydrogen embrittlement sensitivity of duplex stainless steel with different phase fractions evaluated by in-situ mechanical testing by Cauwels, Margo; Claeys, Lisa; Depover, Tom; Verbeken, Kim (2019) - [42] proposed a mechanism for hydrogen cracks in the austenitic phase of a DSS that cross a phase boundary. On the formation and nature of quasi- cleavage fracture surfaces in hydrogen embrittled steels, Acta Mater., 59(4), pp. Keywords: austenite; charging; doi; dss; duplex; embrittlement; ferrite; fracture; heat; hydrogen; samples; steel; tensile
• Numerical modelling of dynamic ductile fracture propagation in different lab-scale experiments using GTN damage model by Paermentier, Benoît; Debruyne, Dimitri; Talemi, Reza (2020) - Citation: Paermentier, B., Debruyne, D., Talemi, R., Numerical modelling of dynamic ductile fracture propagation in different lab- scale experiments using GTN damage model, Frattura ed Integrità Strutturale, 52 (2020) 105-112. Microsoft Word - numero_52_art_09_2668 B. Paermentier et alii, Frattura ed Integrità Strutturale, 52 (2020) 105-112; DOI: 10.3221/IGF-ESIS.52.09 105 Focussed on the 1st Benelux Network Meeting and Workshop on Damage and Fracture Mechanics Numerical modelling of dynamic ductile fracture propagation in different lab-scale experiments using GTN damage model Benoît Paermentier*, Dimitri Debruyne, Reza Talemi Department of Materials Engineering, KU Leuven, Belgium benoit.paermentier@kuleven.be ABSTRACT. Keywords: cvn; damage; dt3; ductile; dwtt; f f; fracture; gtn; model; propagation; simulation; specimen
• Influence of biochar additions on the fracture behavior of foamed concrete by Falliano, Devid; De Domenico, Dario; Sciarrone, Antonino; Ricciardi, Giuseppe; Restuccia, Luciana; Ferro, Giuseppe; Tulliani, Jean-Marc; Gugliandolo, Ernesto (2019) - Citation: Falliano, D., De Domenico, D., Sciarrone, A., Ricciardi, G., Restuccia, L., Ferro, G., Tulliani, J.M., Gugliandolo, E. Influence of biochar additions on the fracture behavior of foamed concrete, Frattura ed Integrità Strutturale, 51 (2020) 189-198. CONCLUSIONS his study has investigated the fracture properties and the mechanical strengths of foamed concrete with and without biochar additions at a target dry density of 1600 kg/m3. Keywords: air; biochar; concrete; conditions; curing; doi; fracture; specimens; strength; water
• Longitudinal fracture analysis of inhomogeneous beams with continuously varying sizes of the cross-section along the beam length by Rizov, Victor; Altenbach, Holm (2020) - The use of power law leads to obtaining of higher strain energy release rate compared to that calculated at linear law (this behavior is attributed to the lower sizes of the beam cross-section when the power law is used for describing the variation of the height and width along the beam length). The fracture is studied in terms of the total strain energy release rate assuming non-linear elastic mechanical behavior of the material. Keywords: beam; cross; energy; energy release; fracture; h h; rate; release rate; section; strain
• Glass/epoxy fiber orientation effects on translaminar fracture toughness under Mixed mode(I/II) load using FPB specimen by Abilash Desai; Sharanaprabhu, C. M. ; Kudari, S. K. (2020) - Specimens were fabricated using hand layup technique with (0/45)° and (0/90)° fiber oriented glass fiber. Effect of fiber angle orientation and stacking sequence on mixed mode fracture toughness of carbon fiber reinforced plastics: Numerical and experimental investigations, Materials Science and Engineering A, 527 pp. Keywords: doi; epoxy; fiber; fracture; glass; laminates; mode; specimen; toughness
• Biochar-based cement pastes and mortars with enhanced mechanical properties by Sirico, Alice; Bernardi, Patrizia; Belletti, Beatrice; Malcevschi, Alessio ; Restuccia, Luciana ; Ferro, Giuseppe Andrea; Suarez-Riera, Daniel (2020) - Figure 12: FESEM micrograph of GBC2% _SOST sample, 2000× magnification. A. Sirico et alii, Frattura ed Integrità Strutturale, 54(2020) 297-316; DOI: 10.3221/IGF-ESIS.54.21 309 Figure 13: FESEM micrograph of GBC2% _SOST sample, 2000× magnification. Keywords: addition; biochar; cement; days; doi; energy; flexural; fracture; gbc; ipc; properties; results; sirico; strength; water
• Mechanical properties of the most common European woods: a literature review by Bartolucci , Beatrice; De Rosa , Andrea; Bertolin, Chiara; Berto, Filippo; Penta, Francesco; Siani, Anna Maria (2020) - Fracture characteristics of different wood species under mode I loading perpendicular to the grain, Mater. All these findings are important to obtain best guesses of wood mechanical parameters which can serve as input in modelling wood behaviour. Keywords: bartolucci; birch; density; doi; fig; fracture; frattura; hardwood; integrità; papers; pine; poisson; properties; ratio; softwood; species; spruce; strutturale; toughness; values; wood
• Effect of the intermediate quenching on fracture toughness of ferrite-martensite dual phase steels by Sunil, B; Rajanna , S. (2020) - Martensite; Ferrite; Intercritical temperature; Volume fraction; Dual phase steel; Fracture toughness. Research also shows, dual phase steels are considered as metallic composite due to its composite microstructure, have the special characteristics like high strength and ductility properties, excellent formability Keywords: carbon; ferrite; fracture; martensite; phase; steel; toughness
• Failure analysis and numerical simulation of slab carrying clamps by Đorđević, Branislav; Sedmak, Simon; Tanasković, Drakče; Gajin, Marko; Vučetić, Filip (2020) - As V Nb Sn W Sb Ta Co N Ca B Pb Fracture surface (weld) 0.0059 0.1197 0.0303 0.0174 0.0019 / / 0.0477 / 0 0 0 Base material 0.009 0.003 0.001 0.011 0.0103 0.003 0.003 0.0184 0.01 0 0 0 Table 1: Chemical composition of welded lever and the base material. CHEMICAL COMPOSITION ANALYSIS he fact that one of the slab carrying clamp support levers was welded unknown until the failure had occurred. Keywords: analysis; doi; failure; fracture; lever; load; numerical; stresses; surface
• Factors affecting reorientation of hydraulically induced fracture during fracturing with oriented perforations in shale gas reservoirs by Li, Qingchao; Zhou, Liang; Li, Zhi-Min; Liu, Zhen-Hua; Fang, Yong; Zhao, Lei; Han, Ying (2021) - A: fracture initiation; B: fracture propagation; C: fracture reorientation; D: proppant retention within fracture. In this section, seven injection rates, 4m3/min, 6m3/min, 8m3/min, 10m3/min, 12m3/min, 14m3/min and 16m3/min, are set to explore the influence of injection rate on fracture initiation and fracture reorientation. Keywords: doi; fluid; fracture; fracturing; initiation; injection; operation; perforation; pressure; principal; rate; reorientation; shale; simulation; stress
• Long-term degradation, damage and fracture in deep rock tunnels: A review on the effect of excavation methods by Frenelus, Wadslin; Peng, Hui; Zhang, Jingyu (2021) - Microsoft Word - numero_58_art_10_3097 W. Frenelus et alii, Frattura ed Integrità Strutturale, 58 (2021) 128-150; DOI: 10.3221/IGF-ESIS.58.10 128 Long-term degradation, damage and fracture in deep rock tunnels: It is quite obvious that, when excavating deep rocks tunnels, the virgin rock mass properties are modified Keywords: convergence; creep; damage; doi; energy; engineering; et al; excavation; fracture; journal; mechanics; methods; properties; rockbursts; rocks; stability; stress; tbm; technology; term; tunnelling; tunnels
• Influence of Oxidation on Fracture Toughness of Carbon-Carbon Composites for High-Temperature Applications by Kumar B.V., Sunil; Londe, Neelakantha V.; Lokesha, M.; Vasantha Kumar, S.N.; Surendranathan, A.O. (2021) -  2 1/2 3/2 1.99 1 2015 3.93 2.7 6 1 2 1 x x x x f x x x x        (2) where, x = (a/W) a b Figure 3: (a) Determination of PQ [15] (b) Geometrical Parameters for SENB Specimen Testing RESULTS AND DISCUSSION Fracture Toughness oad to displacement curve is obtained for room temperature and oxidation temperatures discussed as shown in Fig. [8] Scarponi, C. (2016).Carbon--carbon composites in aerospace engineering. Keywords: carbon; composites; fracture; oxidation; temperature; toughness
• Notiziario n. 18 - Luglio 2007 by none (2013) - Editoriale del Presidente IGF; 2) Cariche sociali biennio 2005-2007; 3) Verbale dell’Assemblea Annuale dei Soci 2006; 4) Il Consiglio di Presidenza approva il verbale. Keywords: alla; all’o.d.g; attività; beretta; che; committee; conference; consiglio; convegno; dei; del; della; esis; fracture; frattura; gruppo; iacoviello; igf; international; italiano; mail; milano; nazionale; politecnico; presidente; professor; punto; rivista; soci; una; università
• Supervised Machine Learning Classification Algorithms for Detection of Fracture Location in Dissimilar Friction Stir Welded Joints by Mishra, Akshansh; Vats, Apoorv (2021) - So, the implementation of Machine Learning algorithms provides statistical framework for assessing the quality of available data [4-5]. Machine Learning algorithms have gained some popularity in the Friction Stir Welding Process [7–9]. Keywords: algorithm; classification; data; fracture; friction; learning; machine; stir
• Effect of the Stress State on the Adhesive Strength of an Epoxy-Bonded Assembly by Smirnov, Sergey; Konovalov, Dmitry; Veretennikova, Irina; Pestov, Aleksander; Osipova, Viktoria (2021) - The region bounded by the fracture loci of adhesive strength and ultimate strain energy density determines the conditions for the safe loading of the bonded assembly in terms of the energy and force criteria of adhesive failure. To study the effect of the stress state on adhesive strength, we used modified Arcan specimens Keywords: adhesive; cleavage; doi; energy; failure; fracture; shear; smirnov; specimens; state; strain; strength; stress; testing; values
• Sensitivity analysis of the GTN damage parameters at different temperature for dynamic fracture propagation in X70 pipeline steel using neural network by Ouladbrahim, Abdelmoumin; Belaidi , Idir; Khatir , Samir; Magagnini, Erica; Capozucca , Roberto ; Abdel Wahab, Magd (2021) - Modeling and simulation of Charpy impact test of maraging steel 300 using Abaqus, IOP Conf. Steel X70; Impact test (CVN); GTN parameters; FEM; Artificial neural network. Keywords: doi; fracture; gtn; impact; load; model; parameters; steel; test; x70
• Ductile fracture modeling of metallic materials: a short review by Fincato, Riccardo; Tsutsumi, Seiichiro (2021) - Ductile damage models The ductile damage evolution and fracture prediction represent the central points for the scientific and engineering community in the framework of material failure. Propagation of discontinuities with damage model, Proc. Comput. Keywords: damage; doi; ductile; ductile damage; evolution; failure; fracture; group; int; loading; lode; material; mech; model; plastic; process; strain; stress; triaxiality
• Methodology of hydrogen embrittlement study of long-term operated natural gas distribution pipeline steels caused by hydrogen transport by Nykyforchyn, Hryhoriy; Zvirko, Olha; Hredil, Myroslava; Krechkovska, Halyna; Tsyrulnyk, Oleksandr; Student, Oleksandra; Unigovskyi, Leonid (2021) - Investigations of influence of natural gas/hydrogen mixtures on mechanical properties of pipeline steels demonstrate their susceptibility to hydrogen-induced embrittlement, which increases with the hydrogen partial pressure increasing [3]. This regularity is inherent not only for pipeline steels but also for metal structures of port cranes Keywords: doi; embrittlement; fracture; gas; hydrogen; nykyforchyn; operation; pipeline; plasticity; specimens; steel; testing
• Review of Current Developments on High Strength Pipeline Steels for HIC Inducing Service by Entezari, Ehsan; González-Velázquez, Jorge Luis ; Rivas López, Diego ; Zúñiga, Manuel Alejandro Beltrán; Szpunar, Jerzy A. (2022) - It is suggested that these alloying elements may control the phase transformation temperature and the rate of hydrogen diffusion, as well as controlling NMI morphology, providing a path to develop high HIC resistance steels for pipeline manufacturing Microsoft Word - numero_61_art_02_3414.docx E. Entezari et alii, Frattura ed Integrità Strutturale, 61 (2022) 20-45; DOI: 10.3221/IGF-ESIS.61.02 20 Review of current developments on high strength pipeline steels for HIC inducing service Ehsan Entezari, Jorge Luis González-Velázquez, Diego Rivas López, Manuel Alejandro Beltrán Zúñiga Department of Metallurgy and Materials, Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Mexico ehsan.entezari2014@gmail.com, https://orcid.org/0000-0003-3379-1761 jlgonzalezv@ipn.mx, https://orcid.org/0000-0001-6914-4449 drivasl@ipn.mx, https://orcid.org/ 0000-0003-4591-719X mabz_2205@hotmail.com, https://orcid.org/0000-0003-4201-9896 Jerzy A. Szpunar Department of Mechanical Engineering, University of Saskatchewan, Canada jerzy.szpunar@usask.ca, https://orcid.org/0000-0002-1291-8375 ABSTRACT. Keywords: cracking; cracks; doi; effect; entezari; fracture; growth; hic; high; hydrogen; integrità; martensite; mater; microstructure; nmi; pipeline; pipeline steels; properties; rate; resistance; steel; strength; stress; strutturale; temperature; toughness
• The use of frictional and bonded contact models in finite element analysis for internal fixation of tibia fracture by Huzni, Syifaul; Oktianda, Fikrir; Fonna, Syarizal; Rahiem, Fazal; Angriani, Lilis (2022) - 2. Figure 1: Internal fixation model for tibia fracture. Figure 4: Meshing on internal fixation models for tibia. Keywords: contact; doi; fixation; fracture; model; seconds; stress; tibia
• Impact behaviour and fractography of 6061 alloy with Trace addition of Sn by Baruah, Monoj; Borah, Anil (2022) - 7(d-f) that relative to AC alloys, the dimples are smaller and denser in PAR alloys. Figs. 8(a, c)] compared to the fine deep dimples seen in B alloy [cf. Fig. 8(b)], which is an indication of better ductility of alloy B Keywords: alloys; doi; fracture; impact; par; peak; state
• The Mechanical properties and statistical analysis of the Charpy impact test using the Weibull distribution in jute-polyester and glass-polyester composites by Tioua, Tahar; Djeghader, Djamel; Redjel, Bachir (2022) - Hemp and sisal composites show a strength comparable to that of glass fiber composites. The specific properties of natural fiber composites are sometimes better than those of fiber glass composites. Keywords: composites; doi; energy; fiber; fracture; glass; impact; jute; materials; polyester; properties; stress; weibull
• Elastic and nonlinear crack tip solutions comparison with respect to failure probability by Shlyannikov, Valery; Tumanov , Andrey; Boychenko , Nataliya (2022) - Using only the information as presented so far is impossible to determine if a test specimen subjected to bending or tension loading, characterized by elastic generalized parameter, has higher or lower probability of failure than the same sample interpreted in terms of plastic GPs. Failure probability; Weibull distributions; Nonlinear stress intensity factors; Generalized parameters. Keywords: distribution; doi; failure; fem; fracture; gradient; parameter; plastic; plasticity; probability; senb; shlyannikov; specimen; strain; stress
• Study of the slant fracture in solid and hollow cylinders: Experimental analysis and numerical prediction by Ben Chabane, Nassima; Aguechari, Nassim; Ould Ouali, Mohand (2022) - c f cf f f f .fu                 : ( ) : t t e e e th e th t t t t t t t t t t tT T    E E E E (B.2) 3. Keywords: alloy; damage; doi; ductile; fracture; frattura; gtn; igf; integrità; material; model; plastic; shear; specimens; stress; strutturale; t t
• Computer Vision Algorithm for the detection of fracture cracks in Oil Hardening Non-Shrinking (OHNS) die steel after machining process by Mishra, Akshansh; S Jatti, Vijaykumar; K Khedkar, Nitin; B. Dhabale, Rahul; V Jatti, Ashwini (2022) - With the aid of images and their corresponding masks, we can explain the key elements of the image that were discovered during image segmentation, allowing us to use them for a variety of future tasks. In the present work, U-Net convolutional neural network is implemented on Jupyter platform by using Python programming for fracture surface image segmentation in Oil Hardening Non-Shrinking (OHNS) die steel after the machining process. Keywords: computer; die; edge; fracture; image; integrità; layer; material; ohns; steel; strutturale; surface; vision
• Mechanical and Fracture Characterization of Epoxy/PLA/Graphene/SiO2 Composites by Dileep, K.; Srinath, A.; Banapurmath, N.R.; Umarfarooq, M.A.; Sajjan, A.M. (2023) - Accordingly, 2-weight percent GNP nanocomposites demonstrated superior characteristics compared to one-dimensional CNTs in epoxy composites containing functionalized carbon nanotubes [CNTs] and GNPs composite. Fibers derived from the different parts of the date palm tree were used as reinforcements in epoxy composites. Keywords: composites; doi; epoxy; filler; fracture; graphene; materials; matrix; nanocomposites; pla; properties; sio2; specimen; strength; tensile
• Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion by Zhang, Yao; Ma, Wei-Hua; Kang, Hong-Zhen; Li, Qiang (2023) - [5] prepared shotcrete by replacing natural sand with iron tailings sand in equal proportions; following a series of tests, iron tailings sand concrete that met the required strength and engineering specifications was obtained. Microscopic test results: the SEM images show that the interface transition zone (ITZ) of iron tailings sand concrete is denser and the bonding state is better, and the MIP show that the addition of iron tailings sand can refine the pore size, reduce large pores and increase small pores. Keywords: concrete; cracking; doi; fracture; ick; ini; iron; iron tailings; load; replacement; river; river sand; sand; sand concrete; tailings sand
• Matrix Hybridization Effects on Interlaminar Fracture Toughness of Glass Epoxy Laminates using Nano and Micro fillers by Joshi, Anant; Gouda, Shivakumar; Sridhar, I.; Umar Farooq , M. A.; Uppin, Vinayak; Maruthi Prashanth, B. H. (2023) - Fig. 15 represents the fractured surfaces of epoxy matrix Glass fiber composites modified with Na2CO3 fillers. The composites consisting of 2wt% Na2CO3 in Glass fiber epoxy composites exhibited higher toughness during crack initiation and the composites consisting of 1wt% Na2CO3 in Glass fiber epoxy composites exhibited higher toughness during crack propagation. Keywords: al2o3; composites; epoxy; epoxy composites; fiber; fracture; glass; glass epoxy; glass fiber; matrix; mode; na2co3; toughness
• Behavior of Zr–1Nb alloy in coarse- and ultrafine-grain states under laser-induced shock wave loading by Ledon, Dmitry; Balakhnin, Aleksandr; Uvarov, Sergey; Bannikova, Irina; Bayandin, Yuriy; Naimark, Oleg (2023) - [5] Wang, Z.D., Sun, G.F., Lu, Y., Chen, M.Z., Bi, K.D., Ni, Z.H. (2020) Microstructural characterization and mechanical behavior of ultrasonic impact peened and laser shock peened AISI 316L stainless steel, Surface and Coatings Technology, 385, pp. [8] Gachegova, E.A., Sikhamov, R., Ventzke, V., Kashaev, N., Plekhov, O.A. (2022) Influence of laser shock peening on low- and high-cycle fatigue of an OT4-0 titanium alloy, Journal of Applied Mechanics and Technical Physics, 63 (2), pp. Keywords: alloy; damage; doi; fig; fracture; gpa; laser; loading; material; peening; pulse; shock; spall; state; surface; ufg; wave
• Fracture Load Estimations for U-Notched and V-Notched 3D Printed PLA and Graphene-Reinforced PLA plates using the ASED Criterion by Sánchez, Marcos; Arrieta, Sergio; Cicero, Sergio (2023) - U-notch G204 9.26 1.05 9.31 1.06 U-notch G205 9.21 1.04 9.27 1.05 U-notch G206 9.29 1.02 9.34 1.03 U-notch G207 10.61 0.97 10.62 0.97 U-notch G208 10.46 0.77 10.49 0.77 U-notch G209 10.14 0.97 10.21 0.98 U-notch G210 20.28 0.82 20.42 0.83 U-notch G211 20.79 0.78 20.87 0.78 U-notch G212 20.33 0.86 20.47 0.87 U-notch G213 40.82 1.00 41.11 1.01 A Structural detail Specimen Lineal elastic SENB calibration PASED (kN) PASED/PEXP PASED (kN) PASED/PEXP U-notch P201 2.91 0.77 4.90 1.29 U-notch P202 2.78 0.68 4.74 1.16 U-notch P203 2.77 0.64 4.73 1.10 U-notch P204 5.86 0.64 9.93 1.09 U-notch P205 5.83 0.67 9.89 1.14 U-notch P206 5.85 0.64 9.91 1.09 U-notch P207 6.64 0.47 11.26 0.80 U-notch P208 6.68 0.50 11.30 0.84 U-notch P209 6.84 0.53 11.51 0.90 U-notch P210 13.08 0.52 22.26 0.89 U-notch P211 13.11 0.56 22.30 0.95 U-notch P212 13.01 0.51 22.18 0.86 U-notch P213 26.83 0.57 45.42 0.97 Keywords: criterion; doi; fracture; loads; material; notch; notches; pla; plates; specimens
• Fracture Simulation of Concrete Beams to assess softening behavior by varying different fractions of Aggregates by Vishwanatha, H. S.; Muralidhara, S.; Raghu Prasad, B. K. (2023) - The present study consists of creating finite element models of different fractions of aggregate and cement matrix along with ITZ and studying the post-peak softening behavior of concrete models. Fracture behaviour of real coarse aggregate distributed concrete under uniaxial compressive load based on cohesive zone model, Materials (Basel), 14(15), DOI: 10.3390/ma14154314. Keywords: aggregate; concrete; doi; fracture; itz; load; model; size; zone
• Mechanical behavior of fiber-glass plastic with hole pattern using digital image correlation and acoustic emission methods by Strungar, Elena; Lobanov, Dmitrii; Chebotareva, Ekaterina; Kochneva, Yaroslava (2024) - (1) when calculating the open-hole capacity for FRP specimens with staggered hole pattern, regardless of the step (s). In most cases, staggered holes demonstrated a staggered trajectory, while a series of non-staggered holes demonstrated a crack trajectory along the section plane. Keywords: composite; doi; emission; fracture; hole; material; signals; specimen; strain; strungar; strutturale
• Fracture processes numerical modeling of elastic-brittle bodies with statistically distributed subregions strength values by Feklistova, Eugeniia; Mugatarov, Artur; Wildemann, Valeriy; Agishev, Anton (2024) - It seems appropriate to conduct further studies with the extended range of stress concentration value. a b Figure 7: The calculated loading diagram (a) and the damages development kinetics (b) for the solid with α=0.8 E.V. Feklistova et alii, Frattura ed Integrità Strutturale, 68 (2024) 325-339; DOI: 10.3221/IGF-ESIS.68.22 333 Stress concentration value influence on the damaging process Similar set of problems is solved for the body with h=4 mm (stress concentration, defined as the ratio of the normal stress σyy at the top of the concentrator and away from it is equal to 9.33 for h=8 mm and 7.06 for h=4 mm) in order to investigate stress concentration value influence on the damaging process. Keywords: body; boundary; distribution; doi; elements; fracture; load; loading; maximum; parameter; process; strength; stress; value
• Interleaving Carbon-Glass Veil in Glass Epoxy Composite for Improved Mode-I Fracture Toughness – A Hybrid Approach by Uppin, Vinayak; Gouda, Shivakumar; Sridhar, I.; M. A., Umarfarooq; Muddebihal , Aravind; Edacherian, Abhilash (2024) - DOI: 10.3221/IGF-ESIS.68.08 134 Figure 8: Interface of fractured DCB samples (a) I-C15G30 (b) I-C20G30 (c) I-C30G30 (d) W-C15G30 (e) W-C20G30 and (f) W- C30G30 Furthermore, in W-C15G30 the crack propagated through the veil interface seen in Fig. 8 (d) in which the plain weaved architecture at the interface helps to migrate the crack and encounter more resistance during initiation and propagation. Photomicrographs in Fig. 9 (g) and (h) show that the fibers were covered with epoxy and residue of veil fibers, and a deformed matrix, which indicates more energy absorption while propagating crack. [18] reported that hybrid veil in polyester/carbon (70:30) showed more stable and improved fracture toughness when compared to carbon veil interleaved uni-directional CFRP composites. Keywords: carbon; composites; doi; epoxy; fiber; fig; fracture; glass; interlaminar; interleaved; mode; toughness; veil
• Predictive Modeling of Fracture Behavior in Ti6Al4V Alloys Manufactured by SLM Process by Sarparast, Mohsen; Shafaie, Majid; Davoodi, Mohammad; Memaran Babakan, Ahmad; Zhang, Hongyan (2024) -  1 1             k k p p pt t t t k k q q qt t t t c c              1 t t t kp p m m     ; 1 t t t kf f   ;   Keywords: ann; behavior; force; fracture; gtn; journal; layer; maximum; model; neurons; parameters; process; sarparast; t t
• Assessing structural integrity of non-homogeneous systems by means of Acoustic Emissions and Non-Extensive Statistical Mechanics by Kourkoulis, Stavros K; Pasiou, Ermioni; Stavrakas, Ilias; Triantis, Dimos (2024) -     q q q q q 1 q S I II S I S II S I S II k (4) clearly reflecting the system’s non-additivity. q-values exceeding unity correspond to systems with sub-additivity, i.e., Sq(I+II)Keywords: acoustic; cement; connector; doi; entropy; events; evolution; fracture; kourkoulis; load; loading; marble; specimen; system; values
• Effect of printing process parameters on tensile strength and wear rate of 17-4PH stainless steel deposited using SLM process by Sahadevan , Priya; Chithirai, Pon Selvan; Lakshmikanthan, Avinash; Bhaumik, Amiya; Cuautle, Agustin Flores (2024) - Factor analysis of selective laser melting process parameters with normalised quantities and Taguchi method, Optics & Laser Technology, 119, pp. The investigation of the influence of laser re‐melting on density, surface quality and microstructure of selective laser melting parts, Rapid Prototyp. Keywords: condition; doi; fracture; laser; manufacturing; melting; parts; phss; process; slm; steel; surface; uts; wear
• Numerical study of the influence of the parameters of statistical distribution of the structural elements’ ultimate strength on deformable bodies’ fracture processes by Feklistova, Eugeniia; Mugatarov, Artur; Wildemann, Valeriy (2024) - For each value of σ, five various sets of FEs ultimate strength values were generated. For a small displacement of the body’s boundary, solutions of boundary value problems within the elasticity theory are obtained for those sets of finite elements’ ultimate strength values that were previously used in the fracture processes modeling. Keywords: body; distribution; elements; fes; fracture; number; process; results; strength; strength distribution; stress; value; weibull distribution
• Microstructure, Mechanical and Fractographic behaviour of the Diffusion Welded Joints of AA2219 and Ti-6Al-4V for aerospace applications by Vatnalmath, Manjunath; Auradi, V.; Bharath, Bharath V; Bharadwaj, Anirudh; Gowda, Chetan; Nagaral, Madeva (2024) - - 0.056 - 0.29 - - - - 3.75 5.68 M. Vatnalmath et alii, Fracture and Structural Integrity, 71 (2025) 37-48; DOI: 10.3221/IGF-ESIS.71.04 40 previous studies and economic factors for the sustainable production of dissimilar diffusion welding joints. AA2219, Diffusion welding, Microstructure, Interface, Intermetallic, Brittle fracture. Keywords: bonding; diffusion; fracture; holding; interface; joints; minutes; strength; temperature; time; welding
• Integrating AI and statistical methods for enhancing civil structural practices: current trends, practical issues, and future direction by Anjum, Asraar; Hrairi, Meftah; Shaikh, Abdul Aabid; Yatim, Noorfazrina; Ali, Maisarah (2024) - Figure 2: Classification and practical applications of civil engineering structures. Tab. 2 illustrates the ANNs approach limitation and challenges in civil engineering structures. Keywords: algorithms; analysis; anjum; concrete; construction; data; design; doe; doi; engineering; fracture; integrity; methods; models; optimization; optimization techniques; research; structures; techniques
• Indentation Fracture Toughness of Aluminium-Graphite Composites: Influence of Nano-particles by Alqahtani, Ibrahim; Niyaz Ahmed, B.; Ashoka, E.; Rajesh, A. M.; Bharath, P. B.; Saleemsab, Doddamani (2024) - The mean effect plot for indentation fracture toughness, obtained from this analysis, is illustrated in Fig. Figure 5: Mean effect plot for indentation fracture toughness. Keywords: al6061; composites; doi; fracture; fracture toughness; graphite; holding; indentation; load; material; nano; particles; toughness
• Numerical study of delamination process of the CFRP composite by Kormaníková, Eva; Kotrasova, Kamila (2024) - This concept has been utilized in interface contact models, where the degradation of adhesion, known as interface damage, is analyzed and discussed. 0 15 30 45 60 75 90 50 55 60 65 70 75 80 85 90 F[N] a[mm] 0,0 0,3 0,6 0,9 1,2 0,0 0,2 0,4 0,6 0,8 1,0 ζ[-] t[s] 0 15 30 45 60 75 90 0 3 6 9 12 15 F[N] δ[mm] 0 3 6 9 12 15 50 60 70 80 90 𝛿𝛿[mm] a[mm] E. Kormanikova et alii, Fracture and Structural Integrity, 71 (2025) 182-192; DOI: 10.3221/IGF-ESIS.71.13 191 DISCUSSION AND CONCLUSION multi-layer laminate model has been introduced, which includes interface model grounded in fracture and contact mechanics. Keywords: composite; delamination; doi; fracture; interface; model; numerical
• Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test by Pandit, Sarthok Chandra; Alang, Nasrul Azuan; Ferdous, Imam Ul; Alias, Juliawati Binti; Hassan, Mohd Firdaus Bin; Ahmad, Asnul Hadi Bin (2025) - In contrast, material deformation is restricted under rough surfaces at both contact surfaces i.e., puncher-specimen and die- specimen, consequently slowing down the thickness reduction rate at the center of the specimen. Clearly, FEM can be a reliable method for analyzing and validating small punch tests. Keywords: deformation; displacement; doi; fig; fracture; friction; hardening; load; material; plastic; punch; specimen; test; thinning
• Studying the fracture surface of brass CuZn37 and aluminum 1100 and their relationship with formability in Single Point Incremental Forming by Qate'a, Marwa K.; Jweeg, Muhsin J.; Mohammed, Adnan I. (2025) - As average void size increased, VVF increased, leading to higher formability (measured by fracture depth and maximum wall angle). Furthermore, this work examines how SPIF input parameters influence the relationship between formability and microstructural changes which are represented by VVF and void size in these materials. Keywords: aluminum; cuzn37; doi; formability; forming; fracture; level; size; specimen; tool; void; vvf
• Study of the forming limit of 6063 aluminum alloy perforated sheet under in-plane and out-of-plane stretching conditions by Lakache, Houssem; May, Abdelghani; Ould Ouali, Mohand; Mokdad, Abdelghani; Benabou, Lahouari (2025) - [13] to predict the FLDs of the Al–Mg–Li alloy sheet that are subsequently compared with the experimental FLDs obtained through NAKAZIMA tests. NAKAZIMA test The NAKAZIMA test results for NPSMs and PSMs are shown in Figs. Keywords: deformation; doi; fig; figure; fracture; frattura; integrità; marciniak; material; nakazima; process; stamping; strain; strutturale; test
• Influence of Silicon Nanosheet (SiNS) on the Toughness of Biphasic Calcium Phosphate (BCP) Composites by Al-Obaidi, Anwer; Dalfi, Hussein; Abdulridha, Nazar; Alomarah, Amer (2025) - The research findings indicated that fracture toughness was directly impacted by the percentage of secondary β Because magnesium oxide breaks down the apatite structure, increasing magnesium oxide by more than 1% resulted in both an increase in microporosity and a drop in fracture toughness. Keywords: bcp; composite; doi; fracture; materials; obaidi; phosphate; sins; strength; tcp; toughness
• A simplified nonlinear model for bamboo-reinforced concrete beams based on lumped damage mechanics by Bomfim, Vitória; Nunes, Sergio; Santos Júnior, Gilberto; Vieira, Camila; Amorim, David (2025) - Load and resistance factor design for bamboo reinforced concrete beam in ultimate flexural limit state, Struct. Experimental evaluation of bamboo reinforced concrete beams. Keywords: bamboo; beams; brc; concrete; cracking; damage; doi; element; fracture; model
• Comparative assessment of the acoustic activity and the Pressure Stimulated Voltage in marble specimens under compression by Kourkoulis, Stavros K; Pasiou, Ermioni; Triantis, Dimos; Stavrakas, Ilias (2025) - This trend seems to be inversed with increasing loading rate. [23] as they were obtained from quasi-static experiments under displacement-controlled conditions (loading rate equal to 10-6 m/min). Keywords: activity; doi; electric; emissions; evolution; fracture; function; kpa; loading; loading rate; marble; psv; rate; signals; specimens; stress; time
• Predicting the strength of 3D-printed conductive composite under tensile load: A probabilistic modeling and experimental study by Naboulsi, Nassima; Majid, Fatima; Hachimi, Taoufik; Barhoumi, Najoua; Khlifi, Kaouthar; Dadoun, Soufyan (2025) - Firstly, the choice of PLA conductive material is essential: it must be of good quality and adapted to 3D fused deposition modeling (FDM). The effect of crosshead speed on the stress-strain curves of conductive PLA printed samples. Keywords: crosshead; doi; effect; fig; fracture; material; notches; pla; specimens; speed; strain; stress; tensile; weibull
• Size Effect in Concrete Beams: A Numerical Investigation Based on the Size Effect Law by Vishwanatha, H. S.; Muralidhara, S.; Raghu Prasad, B. K. (2025) - Fracture size effect: Review of evidence for concrete structures. Parameter For all beam For beam size 250mm, 500mm and 1000mm Experimental Present study Experimental Present study SSA RSA SSA RSA k0 0.877 0.877 0.877 0.877 0.877 0.877 k'0 2.274 2.274 2.274 2.274 2.274 2.274 𝐷0 (mm) 283.1 323.2 324.1 466.3 425 - 𝐵𝑓𝑡 (MPa) 3.16 2.97 3.54 3.00 2.72 - 𝑐𝑓 (mm 54.6 62.32 62.59 89.9 82.0 - B fG (N/m) 59.2 62.66 62.73 73.8 69.0 - Table 6: Size effect parameters and fracture properties from size effect analysis. Keywords: aggregates; beam; concrete; doi; effect; fracture; models; rsa; size; ssa; study
• Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models by Perrella, Michele; Armentani, Enrico; Lamanna, Giuseppe; Berardi, Valentino Paolo (2025) - Cohesive law identification of adhesive layers subject to shear load – An exact inverse solution, Int J Solids Struct, 158. Accuracy of cohesive laws with different shape for the shear behaviour prediction of bonded joints, Journal of Adhesion, 95(4). Keywords: adhesive; cohesive; czm; dir1; dir2; dir3; displacement; doi; energy; fracture; joints; method
• Investigation on the tensile strength, hardness and wear properties in n-B4C reinforced Al7075 composites by Ravikumar (2025) - The inclusion of B4C reinforcements was observed to boost the cleavages' intensity. It can conclude that, the increase in the wt. % of nano B4C particles leads to increased hardness but, leds to decreased ductility. Keywords: alloy; b4c; composites; doi; fracture; hardness; load; loss; matrix; nano; particles; sliding; speed; wear
• Prediction of the tensile strength of FDM specimens based on Tsai Hill criteria by Popa, Cosmin Florin; Galatanu, Sergiu Valentin; Marsavina, Liviu (2025) - 162 Figure 15 presents the true stress–true strain curves for shear specimens accompanied by images depicting strain distribution during testing. orientation specimens exhibited the highest tensile strength and fracture energy. Keywords: contour; figure; fracture; orientation; shear; specimens; strain; strength; tensile
• Study on B4C Particulates Size on Mechanical Behavior, Fractured Surface and Optimization of the Wear Parameters of the Al7075 Composites by Statistical Approach by Ravikumar, M. (2025) - Investigating the combined effects of B4C particle size and wt. % on the mechanical behavior and sliding wear mechanism of created composites is the aim of this work. The composites' wear surface as a function of reinforcing particle size is shown in Fig. Keywords: b4c; cof; composites; distance; fig; fracture; matrix; micro; mmcs; nano; particles; resistance; size; strength; surface; wear
• An experimental study into the net cross-sectional failure of damaged plates with holes for different steel grades and temperatures by Leonetti, Davide; van Schuppen, Bo; Jahanian, Maryam; Mobder, Sumya; Snijder, Bert (2025) - To determine the material properties of steel grade S700MC, a total of five coupon tests (S700MC-T1 to S700MC-T5) are carried out. The approach is only employed here for the specimens in steel grade S700MC and type A. Keywords: assessment; cracks; cross; doi; failure; fracture; load; resistance; s275jr; s700mc; specimens; steel; tests; type
• Damage of additively manufactured polymer materials: experimental and probabilistic analysis by Hachimi, Taoufik; Ait Hmazi, Fouad; Majid, Fatima (2025) - Calculation of static damage using the residual stress method To assess the degree of degradation of the structures studied, it is necessary to measure the level of damage. The latter is directly related to physical properties, hence the importance of adopting a model of damage as a function of the stress state of the structure studied, which is related to the β life fraction, and consequently, the choice of the model of static damage, the expression of which is as follows: H. Taoufik et alii, Fracture and Structural Integrity, 73 (2025) 236-255; DOI: 10.3221/IGF-ESIS.73.16 239   1      1       ur u a u Ds        (2) The β life fraction is defined as follows:   β     a w (3) with : a : crack length for the case of a single notch w : the width of the notch; Keywords: damage; doi; failure; fig; fraction; fracture; integrity; life; material; mpa; orientation; probability; reliability; specimens; strength; stress
• Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates by Dhongade, Nagaraj S.; Meti, Vinod Kumar V.; Siddhalingeshwar, I. G.; Raju, G. U.; Umarfarooq, M. A.; Banapurmath, N.R.; Sajjan, Ashok M.; Uppin, Vinayak S.; Singh, Balbir (2025) - Hybrid metal matrix composites (HMMCs) are advanced engineered materials composed of two or more distinct reinforcements i.e. metallic, ceramic, or non-metallic which arestrategically integrated within a metal matrix to achieve synergistic improvements in performance. Progress in research on hybrid metal matrix composites. Keywords: aa7075; aluminum; composite; doi; fracture; hardness; hybrid; matrix; metal; particles; properties; reinforcement; resistance; strength; tib2; wear; wt.%; zro2
• Dynamic damage analysis of carbon fiber reinforced polymer composite pressure vessels by Hammad, Kamal M.; Sadykova, Iuliia A.; Prokopev, Eugene N.; Tyurina, Galina V.; Ignatyev, Semen D.; Statnik, Eugene S. (2025) - Although it is not necessarily rate-dependent and may need to be extended for high strain-rate applications, Hashin damage model is effective for predicting intralaminar damage because it is physically based and differentiates between fiber and matrix failure modes. Issues such as wave reverberations, limitations in material models, and flaws in wire alignment within explosive channels need to be addressed to produce more efficient models of internal explosion tests. Keywords: +45; composite; damage; doi; energy; experimental; failure; fiber; fracture; material; matrix; model; mpa; numerical; pmma; pressure; rate; shear; strain; strength; stress; tensile; wave
• Parameters Optimization for Manufacturing Advanced Self-Reinforced Composites based on Ultra-High Molecular Weight Polyethylene by Statnik, Eugene; Zherebtsov, Dmitry D.; Chukov, Dilus I.; Larin, Ilya I.; Veveris, Alnis A.; Torokhov, Valerii G.; Kechekyan, Alexander S.; Myagkova, Kristina Z.; Sadykova, Iuliia A.; Salimon, Alexey I.; Korsunsky, Alexander M.; Ignatyev, Semen D.; Hammad, Kamal M.; Kaloshkin, Sergey D. (2025) - While some studies incorporate additional polyethylene grades to fabricate UHMWPE SRCMs [8], this work focuses exclusively on UHMWPE fibers to simplify processing. [15] have demonstrated that plasma modification of UHMWPE fibers can enhance impact resistance by approximately 30 %, offering a scalable route to improve energy absorption in SRCs. Keywords: composites; doi; fiber; fracture; impact; mpa; polyethylene; properties; russia; shear; srcs; statnik; strength; tensile; testing; uhmwpe
• Effect of pearlite nanoclay reinforcements on the mechanical and tribological behaviour of AA7076 metal nanocomposites by Raju, G. U.; Meti, Vinod Kumar V.; Nadugeri, Amitkumar R.; Siddhalingeshwar, I.G.; Umarfarooq, M. A.; Banapurmath, N.R.; Sajjan, Ashok M.; Prashanth, B. H. Maruthi (2025) - Nanocomposites Tensile strength from FE simulation in MPa Tensile strength from experimental results in MPa Variation in results ( %) 1 wt. % nanoclay 120.16 126.27 4.84 1.5 wt. % nanoclay 157.74 146.39 7.57 Table 3: Simulation results of samples. Figure 10: (a-b) SEM micrographs of the worn surfaces of 1 wt. % nanoclay reinforced composite and (c-d) SEM micrographs of the worn surfaces of 1.5 wt. % nanoclay reinforced composite G. U. Raju et alii., Fracture and Structural Integrity, 75 (2026) 281-296; DOI: 10.3221/IGF-ESIS.75.20 291 Figure 11: (a-b) SEM micrographs of the wear debris of 1 wt. % nanoclay reinforced composite and (c-d ) Keywords: aa7076; composites; doi; fracture; hardness; matrix; nanoclay; perlite; perlite nanoclay; properties; reinforcement; strength; tensile; wear
• Numerical modeling of fracture processes of bodies with stress concentrators under conditions of proportional loading, taking into consideration the statistical distribution of ultimate strength and partial loss of load bearing capacity by Feklistova, Eugeniia; Mugatarov, Artur; Wildemann, Valeriy (2025) - Changing the loading mode with equal variation coefficients of strength properties distribution did not qualitatively affect the type of loading diagrams, however, a non- monotonic change in the maximum loads along the x and y axes sustained by the body was observed. The results demonstrate that a decrease in the coefficient of variation of strength properties distribution leads to an almost linear drop in the maximum load, therefore, it is possible to estimate the bearing capacity of the body at intermediate values of the variation coefficients. Keywords: bearing; body; capacity; damage; distribution; doi; elements; fracture; loading; material; properties; strength; stress; value;  
• Correlation Between Process Parameters and Mechanical Properties of Ti6Al4V Alloys Processed by Electron Beam Melting by Schillaci, Carolina; Pilone, Daniela; Berto, Filippo; Bellini, Costanzo; Di Cocco, Vittorio; Di Giamberardino, Paolo; Iacoviello, Daniela (2025) - Microsoft Word - numero_74_art_19_5523.docx C. Schillaci et alii, Fracture and Structural Integrity, 74 (2025) 310-320; DOI: 10.3221/IGF-ESIS74.19 310 Correlation between process parameters and mechanical properties of Ti6Al4V alloys processed by electron beam melting Carolina Schillaci, Daniela Pilone, Filippo Berto Department of Chemical Engineering, Materials and Environment, Sapienza University of Rome, via Eudossiana 18, Rome 00184, Italy. Additive manufacturing, EBM process, Image analysis, Mechanical properties, Ti6Al4V alloy. Keywords: alloy; build; defects; direction; doi; ebm; fracture; fusion; integrity; parameters; process; properties; specimens
• The static and modal analysis of concrete tank filled with water by Filip, Alexander; Tvrda, Katarina; Minárová, Mária (2025) - Within the study of cylindrical tanks and reservoirs, along with the self-weight of the structure and the liquid, the effect of the structure- liquid interaction, both static and dynamic, has to be taken into account. These computational tools have been successfully applied to various pressure vessel applications, including reactor pressure vessels and storage tanks [3]. Keywords: analysis; ansys; apdl; doi; fracture; integrity; modal; pressure; static; tank
• Multidisciplinary characterisation, weathering patterns, and durability assessment of stone blocks for the conservation of Tamentfoust fort (ex. Rusguniae) in Algiers. by MEDDOUR, Nesrine; Djebri, Boualem; Rovero, Luisa (2025) - Biological colonization impacts ~5% of the surface (~10% higher plants in left-central joints and blocks, ~5% lichen/algae stains, right-side dominant), rated moderate, reflecting advanced but limited rooting and superficial staining. Cracking, affecting ~10% of the façade surface, manifests as micro-cracks (~5% of blocks, left-central) and degraded joints (~5–10%), with mild-to-moderate severity indicating superficial damage and early structural cracking near biologically colonized zones due to root pressure. Keywords: alii; analysis; calcite; compressive; crystallization; doi; esis.74.16; fig; figure; fort; fracture; igf; integrity; limestone; loss; mass; meddour; mpa; porosity; salt; sample; stone; strength; test; water
• Assessment of mechanical, fracture and thermal properties of epoxy nanocomposites reinforced with low-concentration nano Boron Carbide (B4C) by Ganji, Akshata; Choukimath, Mantesh; Banapurmath, N.R.; Umarfarooq, M.A.; Chikkamath, Adavayya; Sajjan, Ashok M.; Rajesh, K.; Ramesh M. Kenchappanavar; Ravulapati, Kartheek (2025) - The flexural strength demonstrated a progressive increase with higher B4C content, with neat epoxy exhibiting 47.21 MPa, while B4C composites showed 15.4% (54.46 MPa for EBC1), 20.5 % (58.95 MPa for EBC2), 36.2% (64.31 MPa for EBC3), and 49.3 % (70.46 MPa for EBC4) improvements, respectively. Beyond 0.3 wt. % agglomeration effects reduced performance, a trend consistent with observations in B4C reinforced composites. Keywords: b4c; boron; doi; epoxy; fig; filler; flexural; fracture; integrity; matrix; mpa; nanocomposites; properties; strength; tensile; toughness
• An experimental study on the rehabilitation performance of CFRP-strengthened bubble deck slabs: effects of void size and preloading levels by Abdulridha, Abdulkhalik; Bader , Muntadher (2025) - Despite the environmental and economic advantages of bubble deck slabs, the strength of striking shear and the rehabilitation of such slabs after they are damaged are the primary challenges they present. Therefore, it is imperative to identify the methods of strengthening that can be employed to enhance or restore the load-bearing capacity of bubble deck slabs that have been damaged. Keywords: bubble; cfrp; concrete; damage; deflection; doi; failure; fracture; load; sb-5; sb-6; slabs; strength; void
• Effect of the stress state on ultimate strain energy density in the failure of reinforced epoxy resin by Vichuzhanin, Dmitry; Smirnov, Sergey; Pestov, Alexander; Osipova, Viktoriya (2025) - Thus, for shear  0  at 25 °C, the value of fW is higher for epoxy resin in the entire range of k , though at −50 °C fW is higher for reinforced epoxy resin in the range of compressive stresses  0k  , but lower under tensile stresses. 20 a), though at −50 °C fW is higher for reinforced epoxy resin in the range of compressive stresses  0k  , but lower under tensile stresses (fig. Keywords: doi; epoxy; fig; finite; fracture; resin; specimen; state; strain; stress; testing
• Studies on mechanical, fractured surface, wear, and thermal characteristics of TiC reinforced structural grade Al6061 MMCs by Gowrishankar , T. P.; Umesh , G. L.; Vinod , B. R.; Ravikumar, M. (2025) - TiC particles have been used as reinforcement for Al6061 in a relatively limited number of studies. The goal of the current study is to improve upon Al6061 material by adding TiC particles by the stir casting technique. Keywords: al6061; composites; conductivity; doi; expansion; fracture; hardness; matrix; metal; mmcs; particles; reinforcement; tic; wear; weight
• Elasto-plastic truss optimization under geometric nonlinearity using a genetic algorithm by Grubits, Péter; Porrogi, Pálma; Movahedi Rad, Majid (2025) - Elastic design optimization In this context, plastic analysis offers a promising approach for enhancing structural design and mitigating the risk of catastrophic collapse. Keywords: analysis; bar; design; displacement; doi; elasto; fig; fracture; framework; grubits; initial; integrity; limit; load; op1; optimization; plastic; strain; truss
• Machine learning-assisted fracture prediction: Integrating synthetic and experimental data for quasi-static notch failure analysis by Farooq, Sheikh Aamir; Alajaleen, Danah; Albinmousa, Jafar (2025) - The consistency between simulation results and experimental data also indicates that fracture load data generated from PYMAPDL can be used as a reliable input for data- driven modeling approaches. Performance of ML models for fracture load prediction The XGBoost models were trained to evaluate the effect of the synthetic data on the model accuracy and robustness in predicting the fracture loads of U-notched polycarbonate specimens. Keywords: data; doi; experimental; fracture; learning; load; model; notch; polycarbonate; specimens; stress; synthetic; tcd
• Optimization of austenitic and ferritic steels for deep drawing. Part 2: FEM analyses with damage development. by Casaroli, Andrea; Scabini, Edoardo; Boniardi, Marco Virginio; Andreotti, Riccardo; Rivolta, Barbara (2025) - - Lubrication has a significant impact on sheet metal deformation. https://youtu.be/5hYk7StPQiw A. Casaroli et alii, Fracture and Structural Integrity, 75 (2026) 179-199; DOI: 10.3221/IGF-ESIS.75.13 180 INTRODUCTION eep drawing of stainless steel sheet metal is one of the most widespread technologies in modern industry. Keywords: 304; aisi; blank; deformation; doi; drawing; fracture; holder; metal; punch; sheet; steel; strain; stress; tensile; tests
• Mechanical characterization of metal-ceramic composites by Bolzon, G.; Bocciarelli, M.; Chiarullo, E.J. (2013) - Indentation test can be analysed in the large deformation regime by finite element (FE) approaches, as already done in previous analyses These data can be exploited to enhance the identification of fracture properties through indentation test [12, 14, 16], including them in the discrepancy function (1), compared to the corresponding computed quantities. Keywords: bolzon; ceramic; composites; fracture; indentation; material; metal; parameter; properties
• On the application of the Theory of Critical Distances for prediction of fracture in fibre composites by Taylor, David (2009) - [1] H. Neuber, Theory of notch stresses: principles for exact calculation of strength with reference to structural form and material, 2 ed., Springer Verlag, Berlin, (1958) 292. This paper is concerned with the fracture of composite materials containing stress concentration features such as notches and holes. Keywords: distance; fracture; materials; notch; point; size; stress; value
• Modello coesivo per l’avanzamento di fratture mediante rilascio nodale di strutture discretizzate con elementi finiti by Minotti, M.; Salvini, P.; Mannucci, G. (2013) - Il modo migliore per computarle consiste nell’introduzione di una finestra dinamica di campionamento (vedi Fig. 6). È evidente quindi come la presenza di almeno un nodo all’interno della zona di processo sia una condizione necessaria per il funzionamento del modello coesivo, comportando conseguentemente una correlazione vincolante tra estensione della FPZ ed il grado di risoluzione della mesh utilizzata. Keywords: alii; alla; caso; che; coesivo; con; condizioni; cricca; cui; dei; della; doi; elementi; fig; figura; finiti; forze; fracture; frattura; integrità; materiale; mesh; minotti; modello; nel; nodi; non; propagazione; rilascio; sono; strutturale; tensione; una; valore; work; zona

• Behaviour of a speargun with a novel muzzle - Comportamento di un fucile subacqueo con testata innovativa by Ingrassia, T.; Mucera, M.; Nigrelli, V. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.26.13&auth=true http://www.gruppofrattura.it T. Ingrassia et alii, Frattura ed Integrità Strutturale, 26 (2013) 132-142; DOI: 10.3221/IGF-ESIS.26.13 140 RISULTATI valori di deformazione calcolati numericamente (nei punti corrispondenti ai centri degli estensimetri) e quelli rilevati sperimentalmente sono riportati, per fucile con testata standard e roller, nella Tab. Figura 6: Schema di carico del fucile con testata standard. Keywords: che; con; deformazioni; del; delle; elastici; figure; fucile; fusto; gli; ingrassia; muzzle; più; roller; sono; speargun; standard; strain; testata; una; valori
• Energy dissipation and storage in iron under plastic deformation (experimental study and numerical simulation) by Kostina, A.; Iziumova, A.; Plekhov, O. (2013) - To analyze the thermodynamic characteristics of deformation processes in solids, it is necessary to take into account the fact that the plastic deformation work is converted into two parts: heat energy caused by the movement and annihilation of defects at various structural levels, and hidden (stored) energy of plastic deformation accumulated in the elastic fields of defects. In contrast to this, the experimental result corresponds to initially deformed material which has created effective defect structure for the dissipation of deformation energy. Keywords: deformation; energy; experimental; heat; iron; plastic; process; strain; work
• Study of spatial-time inhomogeneity of serrated plastic flow Al-Mg alloy: using DIC-technique by Tretyakova, T. V.; Wildemann, V. E. (2013) - Figure 5: Axial strain (a), (c) and axial strain rate (b) fields on the specimen’s surface (corresponding to point I, Fig. 4). Figure 7: Axial strain (a), (c) and axial strain rate (b) fields on the specimen’s surface (corresponding to point III, Fig. 4). Keywords: deformation; fig; plastic; rate; specimen; strain; strain rate; time
• Structural transitions in a NiTi alloy: a multistage loading-unload cycle by Di Cocco, V.; Maletta, C.; Natali, S. (2013) - NiTi shape memory alloys (SMAs) are increasingly used in many engineering and medical applications, because they combine special functional properties, such as shape memory effect and pseudo- elasticity, with good mechanical strength and biocompatibility. However, due to their good biocompatibility the most important applications of NiTi alloys are in the field of medicine, where the pseudo-elasticity is mainly exploited for the realization of several components such as cardiovascular stent, embolic protection filters, orthopedic components, orthodontic wires, micro surgical and endoscopic devices. Keywords: alloy; engineering; fig; loading; niti; phase; strain; stress
• Response of porous SMA: a micromechanical study by Sepe, V.; Marfia, S.; Auricchio, F. (2014) - Microsoft Word - numero_29_art_9 V. Sepe et alii, Frattura ed Integrità Strutturale, 29 (2014) 85-96; DOI: 10.3221/IGF-ESIS.29.09 85 Focussed on: Computational Mechanics and Mechanics of Materials in Italy Response of porous SMA: a micromechanical study V. Sepe, S. Marfia University of Cassino and Southern Lazio v.sepe@unicas.it, marfia@unicas.it F. Auricchio University of Pavia auricchio@unipv.it ABSTRACT. In the present contribution a micromechanical study of porous SMA is proposed, introducing the simplifying hypothesis of periodic distribution of voids. Keywords: average; energy; loading; material; memory; shape; sma; strain; stress; voids
• Numerical homogenization of piezoelectric textiles with electrospun fibers for energy harvesting by Maruccio, C.; De Lorenzis, L. (2014) - When an external load is applied to the RVE, the stress, strain and electric fields in the microstructure will show large gradients due to the microstructural heterogeneity. Figures from 5 to 9 provide the contours of displacements, stresses electric field and potential for special cases of boundary conditions applied to the RVE as a function of the fiber arrangement in the material at the microscale. Keywords: contact; electric; field; piezoelectric; potential; rve; shell; strain
• Resilience and ductility of Oxy-fuel HAZ cut by Martín-Meizoso, A.; Aldazabal, J.; Pedrejón, J.L.; Moreno, S. (2014) - 5 shows hardness profiles (Vickers 0.5 kg, HV05) obtained from top (at 0.5 and 2.5 mm from top plate surface), middle and bottom (at 0.5 and 2.5 mm above lower plate surface) of cut edge thickness versus distance from cut edge. [1] Tomas, D.J., Characterisation of steel cut edges for improved fatigue property data estimations and enhanced CAE durability. Keywords: cut; distance; edge; microns; middle; strain; thickness
• Numerical analysis of hydrogen-assisted rolling-contact fatigue of wind turbine bearings by Toribio, J.; Lorenzo, M.; Vergara, D.; Kharin, V. (2014) - According to previous equations, hydrogen diffusion is driven by: (i) the negative gradient of hydrogen concentration (in the classical Fick´s sense); (ii) the positive gradient of hydrostatic stress; (iii) the positive gradient of hydrogen solubility, the latter is one-to- one related to the gradient of equivalent plastic strain so that the plastic strain gradient (a continuum mechanics variable that appears as an output after the FE computation) can be analysed instead of the hydrogen solubility gradient. With regard to the second driving force for hydrogen diffusion, the gradient of hydrostatic stress, at the contact plane (= 0º) a compressive nature distribution in radial direction of such a variable is obtained, progressively decreasing with depth up to becoming null for a depth from the rod surface of about 1 mm (Fig. 7). Keywords: contact; distribution; hydrogen; plastic; rod; strain; stress; surface
• Energy dissipation mechanism and damage model of marble failure under two stress paths by Zhang, Liming; Ren, Mingyuan; Ma, Shaoqiong; Wang, Zaiquan (2014) - [18] draw a conclusion that most of external work was converted into rock elastic strain energy before yielding. The study results show that the change rates of dissipated strain energy are essentially the same in compaction and elastic stages, while the change rate of dissipated strain energy in the plastic segment shows a linear increase, so that the maximum sharp point of the change rate of dissipated strain energy is the failure point. Keywords: damage; energy; failure; point; rate; rock; strain; stress; unloading
• Time-history simulation of civil architecture earthquake disaster relief- based on the three-dimensional dynamic finite element method by Bing, Liu; Yaoguang, Qi; Jiyun, Du (2014) - After the calculation of 25″ moment, cave surrounding rock plastic damage zone was widened and damage degree of surrounding rock was significantly improved. For the purposes of showing the state of surrounding rock damage in the post-processing, second order damage tensor is converted to a first-order damage scalar when output the results file, expressed as   2 2 2 1 2 3D D D D . Keywords: calculation; children; damage; earthquake; equation; rock; strain; stress; time
• Identification of the plastic zone using digital image correlation by Rossi, M.; Sasso, M.; Chiappini, G.; Mancini, E.; Amodio, D. (2014) - Afterwards, in order to apply the VFM, suitable virtual fields are defined so that the contribution of the external forces is zeroed. Considering an isotropic elastic material behaviour, the stress tensor can be written as a function of strain field according to the constitutive equations, for plane stress it follows: 2 1 0 1 0 1 1 0 0 2 xx xx Keywords: fields; plastic; strain; zone
• Evaluation of the AZ31 cyclic elastic-plastic behaviour under multiaxial loading conditions by Anes, V.; Reis, L.; Freitas, M. (2014) - 5a) and 5b) shows the numeric results for 0.4% of total axial strain and 0.23 % of total shear strain. However, in this study the experimental tests were performed from elastic strains until reach total strains with high plasticity resulting in the specimen collapse at very few load cycles. Keywords: behaviour; cyclic; hysteresis; loading; model; plastic; strain; stress; total
• On the improved adhesion of NiTi wires embedded in polyester and vinylester resins by Merlin, Mattia; Scoponi, Martina; Soffritti, Chiara; Fortini, Annalisa; Rizzoni, Raffaella; Garagnani, Gian Luca (2014) - This paper discusses the effect of different surface treatments on shape memory alloy wires embedded in PolyEster (PE) and VinylEster (VE) polymeric matrices. [44] Rossi, S., Deflorian, F., Pegoretti, A., D’Orazio, D., Gialanella, S., Chemical and mechanical treatments to improve the surface properties of shape memory NiTi wires, Surf. Keywords: adhesion; alloy; fig; load; matrix; memory; niti; pull; samples; shape; strain; surface; wire
• A new micromechanical model of CNT-metal nanocomposites with random clustered distribution of CNTs by Gao, Chongyang; Lu, Yu; Zhu, Y.T. (2015) - (10), we can get the modified micromechanical model of CNT reinforced metal matrix composites to describe their thermo-viscoplastic flow behaviors: 1/2 2 2 2 2 2 1 1 1 11 1 2 0 0 ( ) 1 = ( ) Thus, by substituting Eqs. (12) and (13) into Eq. (14), the strengthening stress (  ) contributed directly by CNTs can be finally integrated as C. Gao et alii, Frattura ed Integrità Strutturale, 33 (2015) 471-484; DOI: 10.3221/IGF-ESIS.33.52 476 0 max( ) 1 ( ) 1- 1 f f f f mf EP D R A l G  Keywords: cnt; cnts; composite; diameter; distribution; flow; length; matrix; model; strain; strength; stress; volume
• Role of multiaxial stress state in the hydrogen-assisted rolling-contact fatigue in bearings for wind turbines by Toribio, J.; Lorenzo, M.; Vergara, D. (2015) - According to previous equations, hydrogen diffusion is driven by: (i) the negative gradient of hydrogen concentration (in the classical Fick´s sense); (ii) the positive gradient of hydrostatic stress; (iii) the positive gradient of hydrogen solubility, the latter is one-to-one related to the gradient of equivalent plastic strain so that the plastic strain gradient can be analysed instead of the hydrogen solubility gradient. Figure 6: Distribution of hydrostatic stress: (a) 3D view of the contacting plane and (b) radial distribution for diverse circumferential coordinate . J. Toribio et alii, Frattura ed Integrità Strutturale, 33 (2015) 434-443; DOI: 10.3221/IGF-ESIS.33.48 439 For completing the analysis of hydrogen diffusion and accumulation on the rod during life in service, the information obtained from the estimation of hydrogen concentration in the radial direction [2,3] can be completed by a discussion of the implications of diffusion in the circumferential direction. Keywords: contact; distribution; hydrogen; plastic; rod; strain; stress; surface; zone
• Shortcuts in multiple dimensions: the multiaxial racetrack filter by Meggiolaro, M.A.; Castro, J.T.P.; Wu, H. (2015) - In this example, point iP  can be filtered out, since it does not alter the translation direction during the (multiaxial) load history path 1 1i i iP P P     . I M.A. Meggiolaro et alii, Frattura ed Integrità Strutturale, 33 (2015) 368-375; DOI: 10.3221/IGF-ESIS.33.40 372 Figure 4: Hyper-sphere translations along 1i in n   , caused by the path 1 1i i iP P P     . Keywords: fig; filter; history; racetrack; strain
• Microstructural study of multiaxial low cycle fatigue by Sakane, Masao; Itoh, Takamoto (2015) - Additional hardening occurred under nonproportional loading, where principal axes change their directions with time. 4 relates the cyclic strain hardening coefficient and exponent ratios with the stacking fault energy, where the ratios are the coefficient and exponent in nonproportional loading divided by those in proportional loading. Keywords: cell; dislocation; fault; fig; hardening; loading; stacking; strain; stress
• Application of martensitic SMA alloys as passive dampers of GFRP laminated composites by Bocciolone, M.; Carnevale, M.; Collina, A.; Lecis, N.; Lo Conte, A.; Previtali, B.; Biffi, C.A.; Bassani, P.; Tuissi, A. (2012) - SMA hybrid composite; Structural damping; Laser micro-cutting; Railway collector. Since the concept of SMA hybrid composites was first proposed in 1988 by Rogers et al. Keywords: amplitude; composite; damping; fiber; frequency; gfrp; horn; hybrid; sheets; sma; strain; thickness
• A comparative study on dynamic mechanical performance of concrete and rock by Zhengbing, Xia; Kefeng, Zhang; Yanfeng, Deng; Fuwen, Ge (2015) - INTRODUCTION tudies focusing on dynamic mechanical performance of rock materials, a relatively basic branch in rock mechanics, originate from researches on safety protection of atomic energy plant and earthquake engineering [1]. As engineering construction frequently involves rock materials in the last few years, to be specific, national large-scale energy engineering including water and electricity and nuclear power project, transportation including national railway and highway, engineering including blasting excavation and fixed point blasting or facilities establishment including high-level building, bridge, airport pavement and dam all involves dynamic mechanical performance of rock materials under the impact of medium and high strain-load [2], more and more experts and scholars devote themselves to deep study of dynamic mechanical properties of rock materials. Keywords: concrete; energy; materials; performance; rate; rock; strain
• New experimental techniques for fracture testing of highly deformable materials by Dall’Asta, E.; Ghizzardi, V.; Brighenti, R.; Romeo, E.; Roncella, R.; Spagnoli, A. (2015) - To draw a boundary line between the plethora of techniques that can be used for image matching applications, a first criterion is the kind of image elements that are tackled by the algorithm. DIC performances depend on the algorithm capability to identify the same feature in different images: well-contrasted and recognizable pattern facilitate the tracking process, achieving good accuracies and high matching reliability. Keywords: asphalt; axis; dic; displacement; image; matching; materials; results; sgm; strain
• Ratcheting of 316L stainless steel thin wire under tension-torsion loading by Fu, Sichao; Yu, Dunji; Chen, Xu (2016) - Figure 6: Ratcheting strain predicted by the O-W and the C-J-K models, (a) cases 1-3 under constant axial stress, (b) case 4 under linear path, (c) case 5 under rhombic path, (d) case 6 under circular path. Case 1 0.55 0 0 128 Case 2 0.55 0 0 77 Case 3 0.55 0 0 26 Case 4 0.55 0 51 77 Case 5 0.55 0 51 77 Case 6 0.55 0 51 77 Table 1: Multiaxial ratcheting testing of 316L wire under various loading paths EXPERIMENTAL RESULTS ig. 3 shows the experimental results of Case 4 under linear path. Keywords: case; loading; path; ratcheting; strain; stress
• Numerical modelling of ductile damage mechanics coupled with an unconventional plasticity model by Fincato, R.; Tsutsumi, S. (2016) - [14] Lemaitre, J., In: A course on damage mechanics, Berlin, Heidelberg, New York: Springer (1996). Microsoft Word - numero_38_art_31 R. Fincato et alii, Frattura ed Integrità Strutturale, 38 (2016) 231-236; DOI: 10.3221/IGF-ESIS.38.31 231 Focussed on Multiaxial Fatigue and Fracture Numerical modelling of ductile damage mechanics coupled with an unconventional plasticity model R. Fincato, S. Tsutsumi University of Osaka, Japan fincato@jwri.osaka-u.ac.jp, http://orcid.org/0000-0002-2345-6790 tsutsumi@jwri.osaka-u.ac.jp, http://orcid.org/0000-0002-2345-6791 ABSTRACT. Keywords: damage; material; model; plastic; strain; stress; surface
• A comparison of methods for calculating notch tip strains and stresses under multiaxial loading by Lutovinov, M.; ?erný, J.; Papuga, J. (2016) - Since the first two approaches are time consuming, it is desirable to use estimation methods that provide results based on elastic FE simulation only. A comparison of methods for calculating notch tip strains and stresses under multiaxial loading M. Lutovinov, J. Černý, J. Papuga FME CTU in Prague, Technická 4, 166 07 Prague 6, Czech Republic maxim.lutovinov@fs.cvut.cz jiri.cerny2@fs.cvut.cz jan.papuga@fs.cvut.cz, http://orcid.org/0000-0001-9569-4997 ABSTRACT. Keywords: equations; loading; method; results; rule; strain; stress; stresses
• Structural mechanisms of formation of adiabatic shear bands by Sokovikov, Mikhail; Bilalov, Dmitry; Oborin, Vladimir; Chudinov, Vasiliy; Uvarov, Sergey; Bayandin, Yuriy; Naimark, Oleg (2016) - The lateral surface of the samples was investigated in a real-time mode with the aid of a high-speed infra-red camera CEDIP Silver 450M. The temperature field distribution obtained at different time made it possible to trace the evolution of plastic strain localization. Plastic strain localization; Microdefects; Dynamic loading; Numerical modeling. Keywords: deformation; loading; localization; plastic; plug; shear; sokovikov; strain; surface
• Nonlinear analysis of reinforced and composite columns in fire by Navrátil, Jaroslav; Kabelá?, Jaromír (2016) - Reinforced concrete column First example is reinforced concrete column according to [2], which was also chosen by the RILEM Technical Committee TC 114 as one of the benchmark problems for testing the computational models and computer programs for reinforced concrete structures. [1] Bratina, S., Čas, B., Saje, M., Planinc, I., Numerical modelling of behaviour of reinforced concrete columns in fire and comparison with Eurocode 2, Int. Keywords: analysis; column; concrete; fig; idea; steel; strain; stress
• Experimental analysis on physical and mechanical properties of thermal shock damage of granite by Xiao, He; Qing, Li; Hongkai, Chen; Hongmei, Tang; Linfeng, Wang (2016) - It was because of the evaporation of both free water in granite cracks and the expansion of micro-cracks of the granite. The axial loading of the cylinder sample which was cooled down after high temperature heating was controlled by the displacement generated by the hydraulic cylinder. Keywords: analysis; cracks; curve; granite; heating; increase; peak; strain; stress; temperature; water
• Experimental investigation of the mechanical properties of Alfas stone by N. Kaklis, Kostas; P. Mavrigiannakis, Stelios; Agioutantis, Zach G.; Steiakakis, Emmanouil K.; Stathogianni, Foteini K. (2017) - For the case of Poisson’s ratio (Fig.7b) the trend of these curves is similar for all diameters, while for the intact rock modulus (Fig.7a) this similarity is only observed for stresses greater than 50% of specimen strength. In rock mechanics and engineering geology, the uniaxial compression and the indirect tension test (Brazilian test) are considered to be the most widely spread methods to obtain rock strength properties and parameters such as the intact rock modulus and Poisson’s ratio. Keywords: alfas; diameter; fig; modulus; poisson; ratio; rock; size; specimen; stone; strain; strength; tensile; test
• Correlation between the electric and acoustic signals emitted during compression of brittle materials by Pasiou, Ermioni D.; Triantis, Dimos (2017) - Afterwards, Ib-value is almost constant with variance around ~2.0 indicating the slow generation of new micro-cracks (until point A2 in Fig.4(a1) which corresponds to stress level ~80% of the maxi- mum stress and strain ~60% of the maximum strain). The improved b-value (Ib-value) is one of the acoustic characteristics which is related to the impending failure Keywords: electric; glass; marble; materials; mortar; point; psc; specimen; strain; stress; techniques; value
• Strain monitoring of cement-based materials with embedded polyvinyl alcohol - carbon nanotube (PVA-CNT) fibers by Metaxa, Zoi S.; Neri, Wilfrid; Poulin, Philippe; Alexopoulos, Nikolaos D. (2017) - Figure 11: Increasing loading – unloading loops in type I specimen with embedded optical fiber and attached strain gauge for maximum loadings up to: (a) 40 Ν, (b) 80 Ν, (c) 160 Ν, (d) 240 Ν, (e) 320 Ν and (f) 360 Ν. The same experimental protocol was applied on prismatic cementitious specimens with embedded coated PVA-CNT fiber as well as coated and annealed PVA-CNT fiber, where the test results can be seen in Figs. In the present work, the following kinds of sensors were used: (a) 2 different types of CNT reinforced PVA fibers (PVA- CNT fibers). Keywords: bending; cement; cnt; cnt fiber; erc; fiber; fig; loading; pva; sensors; specimen; strain; surface; type
• Research on differences and correlation between tensile, compression and flexural moduli of cement stabilized macadam by Yang, Yi; Zheng, Jianlong; Lu, Songtao (2017) - Shot Peening Processes to obtain Nanocrystalline surfaces in metal alloys: Y. Yang et alii, Frattura ed Integrità Strutturale, 41 (2017) 339-349; DOI: 10.3221/IGF-ESIS.41.45 339 Research on differences and correlation between tensile, compression and flexural moduli of cement stabilized macadam Yi Yang School of Traffic and Transportation, Changsha University of Science & Technology, Hunan 410004, China; Modern Investment Co., Ltd., Hunan 410004, China 114949297@qq.com Jianlong Zheng School of Traffic and Transportation, Changsha University of Science & Technology, Hunan 410004, China zjl@csust.edu.cn Songtao Lv School of Traffic and Transportation, Changsha University of Science & Technology, Hunan 410004, China lstcs@126.com ABSTRACT. By using the materials testing system, we test three moduli of the cement stabilized macadam under different loading rates, propose a flexural modulus calculation formula which considers the shearing effect, reveal the change rules of the tensile, compression and flexural moduli with the loading rate and establish the conversion relationships between the three moduli. Keywords: cement; compression; loading; moduli; modulus; shear; specimen; strain; tensile; test
• Analysis of longitudinal cracked two-dimensional functionally graded beams exhibiting material non-linearity by Rizov, Victor (2017) -      3 3 2 2 22 2 1 2 1 22 21 3 2 f q f q f q f qu u u u u u u u nq q q qu u u u u u u u u u u u u zB q f q f qh                         12 2 1 12 1 1 1 2 1 22 2 1 2 1 m nm m m mzB br m mh                  (18) Keywords: b b; beam; f q; q u; strain; u b; u u
• Four-point bending test on a middle strength rock: numerical and experimental investigations by Mardalizad, Aria; Scazzosi, Riccardo; Manes, Andrea; Giglio, Marco (2017) - [37] Mardalizad, A., Manes, A., Giglio, M., Investigating the tensile fracture behavior of a middle strength rock: experimental tests and numerical models, 14th The formulation of KCC model is explained by means of this cylindrical coordinate system as a clearer way of guidance for readers. Keywords: failure; fig; function; kcc; material; model; numerical; parameters; results; rock; sph; strain; strength; stress; tensile; test
• Tests in tension-torsion conditions with descending sections of strain curve construction by Tretiakov, M.P.; Vildeman, V.E. (2013) - It is confirmed in uniaxial tension tests with unloading on postcritical deformation stage. In the second test group specimens with different diameters (5 mm, 10 mm, 13.5 mm) with the same ratio of test part length to diameter (l0/d=1) were used. Keywords: deformation; softening; specimen; stiffness; strain; tension; test; torsion
• Regularities of fracture pattern formation in alumina ceramics subjected to dynamic indentation by Tolmacheva (Lyapunova), E.; Davydova, M.; Chudinov, V.; Uvarov, S.; Naimark, O.; Zaytsev, D.; Panfilov, P. (2017) - In this paper the process of dynamic indentation, causing deformation and fracture of alumina ceramics, is investigated. Dynamic indentation; Computer tomography; Alumina; Fracture. Keywords: area; fig; indentation; indenter; load; loading; material; rod; sample; sensor; strain
• Influence the loading conditions and the stress concentrators on the spatial-time inhomogeneity due to the yield delay and the jerky flow: study by using the digital image correlation and the infrared analysis by Tretyakova, Tatyana V.; Wildemann, Valery E. (2017) - As written above, the aim of this study is to estimate the influence of the stress concentrators and the stiffness of the loading system ( LSR ) on the effects of the serrated flow, on the initiation of strain bands of localized plastic deformation. Figure 9: Inhomogeneous local strain rate fields on the surface of the flat specimen with additional deformable part. Keywords: doi; fig; integrità; loading; plastic; specimen; stiffness; strain; strutturale; system
• Failure analysis of thin metal foils by Bolzon, G.; Shahmardani, M.; Liu, R.; Zappa, E. (2017) - The mechanical response and the failure mode of thin metal foils under tensile load has been analyzed supplementing the usual test records with full-field measurements performed by three-dimensional digital image correlation (3D DIC) techniques. Thin metal foils; Failure analysis; Digital image correlation; Numerical simulation. Keywords: bolzon; displacement; fig; figure; material; plane; strain; stress; thin
• Experimental study on uniaxial tensile and compressive behavior of high toughness cementitious composite by Jiang, ShiYong; Tao, Shuai; Fei, Wei; Li, XueYang (2017) - [1] Zhang, J., Li., V. C., Effect of inclination angle on fiber rupture load in fiber reinforced cementitious composites, Composites Science & Technology, 62 (2002) 775–781. Though the principle of orthogonal experimental design, the uniaxial compression experiment and uniaxial tensile experiment were carried out on nine groups of high toughness cementitious composites with different mixing ratios to study the influence of four factors, namely fly ash content, water-binder ratio, sand-binder ratio and plasticizer content on the compressive strength and ultimate tensile strain of high toughness cementitious composites. Keywords: binder; binder ratio; compressive; content; ratio; strain; strength; tensile; water
• Regularities of mechanical behavior of steel 40Cr during the postcritical deformation of specimens in condition of necking effect at tension by Tretyakov, M.P.; Tretyakova, T.V.; Wildemann, V.E. (2017) - On the base of obtained results, the stiffness and strength of 40Cr steel were evaluated in a necked specimen at various stages of postcritical deformation. Experimental mechanics, postcritical deformation, strain localization, neck, tension, digital image correlation. Keywords: deformation; doi; fig; length; neck; scheme; specimens; strain; system; tension; test
• Relay-race deformation mechanism during uniaxial tension of cylindrical samples of carbon steel: using digital image correlation technique by Tretiakova, T.V.; Vildeman, V.E. (2013) - As was mentioned above, the abrupt strain flash appeared (curve III, Fig. 5) at the moment of transition through an upper yield point (point II, Fig. 2), and a wave front of axial strain was initiated. http://dx.medra.org/10.3221/IGF-ESIS.24.01&auth=true http://www.gruppofrattura.it T.V. Tretiakova et alii, Frattura ed Integrità Strutturale, 24 (2013) 1-6; DOI: 10.3221/IGF-ESIS.24.01 5 On the basis of experimental data time dependences of axial strain were determined for five areas of material, marked on the surface of sample test portion (Fig. 6). Keywords: deformation; digital; material; sample; stage; strain
• Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory by Li, Shuchen; Zhang, Luchen; Sun, Qian; Tengfei, Ma (2018) - Therefore, studying rock fracture from the micromechanics perspective, analyzing the damage rules of tiny rock elements, and studying element failure through element energy dissipation and energy criterion can systematically show the entire rock fracture process. For rock elements entering the damage state, the energy failure criterion of strain energy density is used to determine whether the element is damaged. Keywords: damage; density; element; energy; energy density; failure; rock; strain; strain energy
• Ductile damage evolution law for proportional and non-proportional loading conditions by Fincato, Riccardo; Tsutsumi, Seiichiro; Momii, Hideto (2018) - (15), where the acronym NP-D stands for non-proportional damage law. A damage acceleration, function of material parameters, is triggered whenever non-proportional loading condition are realized. Keywords: damage; doi; ductile; eqn; evolution; loading; material; model; non; plastic; rate; strain; stress
• Damage evolution law on the surface field of argillaceous dolomite based on Brazilian test and 3D digital image correlation by Wang, Xiaochuan; Yang, Delei (2019) - The fluctuations of the damage factor curve also reveal the features of surface field damage evolution of argillaceous dolomite in Brazilian test. The fluctuations of the damage factor curve also reveal the features of surface field damage evolution of argillaceous dolomite in Brazilian test. Keywords: brazilian; damage; direction; evolution; field; rock; strain; test
• Rock Brittleness Evaluation Method Based on the Complete Stress-Strain Curve by Liu, ChenYang; Wang, Yong; Zhang, XiaoPei; Du, LiZhi (2019) - The surrounding rock pressure was loaded at a rate of 0.1MPa/s, and the axial force is subject to displacement control, with a loading rate of 0.002mm/s. Comparison and verification of rock brittleness indices under different surrounding rock pressures [6] and Hetényi [7] argue that rock brittleness is characterized by low elongation or low strain value due to the lack of ductility or compressibility. Keywords: brittleness; brittleness index; index; peak; pressure; rock; rock brittleness; strain; stress
• Comparative evaluation of two physically based models for the description of stress-relaxation behaviour of 9% chromium containing steel by Christopher, J.; Praveen, C.; Choudhary, B.K. (2019) - Loading waveform for stress relaxation tests and b) Stress-strain curve for strain hold of 1.3% at 873 K. J. Christopher et alii, Frattura ed Integrità Strutturale, 48 (2019) 554-562; DOI: 10.3221/IGF-ESIS.48.53 558 METHODOLOGY FOR PARAMETRIC OPTIMIZATION he physical constants associated with these models have been determined by the minimization of errors between experimental and predicted relaxation stress vs. hold time data for two different strain hold levels of 1.3 and 2.5% at 873 K for E911 steel. In addition to prediction of relaxation stress vs. hold time data, Model-II describes the evolution of internal stress, inter-barrier spacing and activation volume with the hold time. Keywords: behaviour; doi; e911; hold; model; rate; relaxation; steel; strain; stress; time
• In-plane anisotropy in deformation micro-mechanism of commercially pure titanium during monotonic tension and cyclic loading by Ghosh, Atasi (2019) - TENSILE AND RATCHETING PROPERTY he variation of true stress vs true strain shown in Fig. 3b, 3c and 3d, respectively indicates longer cyclic life for 0R sample but higher ratcheting strain for 90R sample. Keywords: activity; deformation; doi; fig; loading; orientation; sample; slip; strain; tensile; titanium; twin
• Timber beam seismic design – A numerical simulation by Namdar, Abdoullah; Dong, Yun; Liu, Yuyi (2018) - The innovation of this paper is to develop cycling graphs by using ABAQUS, to improve design of timber frame and give an adequate explanation of seismic behavior of timber beam. But seismic design of timber frame subjected to near-fault ground motions, developing cycling graph using ABAQUS, and an explanation of the seismic behavior of timber beams have never been reported in the literature. Keywords: analysis; beam; displacement; doi; frame; load; numerical; strain; timber
• Cohesive fracture in composite systems: experimental setup and first results by Berardi, Valentino Paolo; Perrella, Michele; Cricrì, Gabriele (2019) - Several experimental debonding tests on a concrete block externally plated with GFRP pultruded laminate have been performed for validation purposes at the Design Machine Laboratory of the University of Salerno. The experimental methodology was validated within experimental tests on debonding failure of concrete blocks reinforced with GFRP pultruded laminate, carried out at the Design Machine Laboratory of the University of Salerno. Keywords: berardi; composite; concrete; debonding; dic; engineering; frp; strain
• Comparative study of conventional and hydromechanical deep drawing processes based on finite element analysis by ABBADENI, Mohammed; Zidane, Ibrahim; Zahloul, Hamou; Madaoui, Zakaria (2019) - When compared with CDD process, less thinning is observed in HDD process. In HDD process, the plastic strain distribution is more uniform compared to CDD process and the maximum strain values are lower. Keywords: blank; doi; drawing; fluid; hdd; pressure; process; punch; strain
• Flexural testing and analysis of full-strain-fields in sandwich composites by Marat-Mendes, Rosa; Martins, Ricardo; Garcia, Alexandre; Reis, Luis (2019) - Figure 14: Mid-span VIC xx contour behavior of: SA face sandwich’s with (a) 1 mm; (b) 2 mm; (c) 3 mm; and SB face sandwich’s with (d) 1 mm; (e) 2 mm; (f) 3 mm. [18] using a standard test method for flatwise compressive strength of sandwich cores. 
 Keywords: 3pb; 4pb; aluminum; behavior; bending; bfrp; core; dic; displacement; faces; fea; fig; load; mid; sandwich; span; specimens; strain; tests
• ANN Approach to Predict the Flow Stress of CMn (Nb-Ti-V) Micro Alloyed Steel by ALLAOUI, Abdelhalim; GUEDRI, Abdelmoumene; DARSOUNI, Lamia; DARSOUNI, Abderrazek (2019) - Figure 10-a: Experimental versus predicted flow stress for the training set Figure 10-b: Experimental versus predicted test flow stress data set A. Abdelhalim et alii, Frattura ed Integrità Strutturale, 49 (2019) 350-359; DOI: 10.3221/IGF-ESIS.49.35 356 Figure 10-c: Experimental versus predicted validation flow stress data set.     2 1 1              N i MSE Ei Pi N (1) where E and P are experimental and predicted flow stress values respectively and N the number of data sets. Keywords: ann; flow; model; strain; stress
• Steady plastic wave fronts and scale universality of strain localization in metals and ceramics by Bayandin, Yuriy; Saveleva, Natalia; Naimark, Oleg (2019) - Present study includes an analysis of the models of elastoplastic materials under shock wave loading taking into account the link between the relaxation mechanisms and the stages of failure with the nonlinear kinetics of mesoscopic defects (microcracks, microshears); identification of model parameters based on the results of dynamic experiments; numerical simulation of plane shock wave loading; verification of the model based on the comparison with the results of original experiments on shock wave loading of samples (metals and ceramics); substantiation on the basis of the results of numerical simulations and experimental data of self-similar propagation of shock wave fronts, the stages of failure in metals and ceramics. Wide- range constitutive equations reflecting the linkage between defect-induced mechanisms and structural relaxation are used in the numerical simulation for shock wave loading of metals and ceramics in the comparison with experiments. Keywords: bayandin; damage; defects; doi; kinetics; loading; metals; numerical; plastic; relaxation; shock; simulation; strain; stress; wave
• Simulation of deformation and fracture processes in nanocomposites by Vakhrushev, Alexander Vasilyevich; Fedotov, A.Y. (2019) - After placing the filler (nanoparticles or nanofibers of iron atoms) into a computational cell, which already contains aluminum atoms, the atomic system was relaxed for 20 picoseconds. Then, as the strain increases to 0.2, a substantial rearrangement of the crystal lattice of aluminum atoms is observed (Fig. 4 b) only in the contact area of the matrix and the filler. Keywords: a.v; aluminum; atoms; deformation; doi; fig; iron; matrix; strain; structure; vakhrushev
• Numerical analysis of application limits of Vyalov’s formula for an ice-soil thickness by Zhelnin, Maxim; Kostina, Anastasiia; Plekhov, Oleg; Panteleev, Ivan; Levin, Lev (2019) - A mechanical behavior of frozen soil is described by Vyalov’s constitutive relations. The aim of AGF is a creation of a temporary wall of frozen soil around the intended excavation. Keywords: creep; cylinder; doi; formula; ice; numerical; simulation; soil; strain; thickness; vyalov; wall
• Numerical analysis of the strain values obtained by FBG embedded in a composite material using assumptions about uniaxial stress state of the optical fiber and capillary on the Bragg grating by Kosheleva, Natalia Aleksandrovna; Matveenko, Valerii; Serovaev, Grigorii; Fedorov, Andrey (2019) - Finite element prediction of resin pocket geometry around embedded optical fiber sensors in prepreg composites, Compos. Microstructured optical fiber Bragg grating as an internal three- dimensional strain sensor for composite laminates, Smart Mater. Keywords: bragg; capillary; composite; doi; fiber; grating; material; pcm; pocket; sensor; strain
• A viscoelastic-viscoplastic model for a thermoplastic and sensitivity of its rheological parameters to the strain-rate by Saadallah, Younès; Derfouf, Semcheddine; Guerira, Belhi (2019) - This behavior depends on many external factors such as temperature and strain rate, but also other internal factors including entanglements, crosslinking and crystallinity degree Effects of strain rate and temperature on the tension behavior of polycarbonate, Materials & Design, 38, pp. 53-58. Keywords: behavior; limit; model; parameters; polymers; rate; strain; strain rate; stress; viscoplastic
• Numerical analysis of the state of stress and strain in the Yenisei Ridge based on the regional tectonic state in the Asian continent by Ayan, Akhmetov; Smolin, Igor Yu.; Peryshkin, Aleksey Yu. (2019) - At the second stage, tectonic stresses are added, namely, compression along the profile. With the 300 million year evolution of tectonic transformations in Asia, from the division of Pangea into Gondwana and Laurasia to the formation of modern Asian mountain systems, the global pattern of plate motion plays a minimal role in the study of regional tectonic flow and is used only to evaluate initial and boundary conditions in the studied area Keywords: craton; doi; flows; profiles; ridge; siberian; state; strain; stress; yenisei; yenisei ridge
• A simplified damage evolution relationship and deformation character¬istics of a pozzolanic lime mortar when subjected to unloading-reloading cycles in the pre-peak region by Kaklis, Kostas; Agioutantis, Zach; Mavrigiannakis, Stelios; Maravelaki-Kalaitzaki, Pagona (2019) - For triaxial compression cyclic test: 𝜀 0.89 ∙ 𝜀, 𝜀 0.11 ∙ 𝜀 (2) For triaxial compression cyclic test: 𝜀 0.34 ∙ 𝑒 . Keywords: compression; confining; cyclic; doi; loading; modulus; mortar; mpa; pressure; strain; stress; tests; triaxial; uniaxial
• Numerical investigation of the effect of constrained groove pressing process on the mechanical properties of polyamide PA66 by Bennouna, Mohammed Salah; Kaddour, Sadek; Aour, Benaoumeur; Damba, Nadir (2019) - Note that true strains values are used for the simulation and not nominal values. We can also see that the equivalent plastic strain in the middle of the sample is very small compared to the other two surfaces for the case of the three cycles and that the lower surface keep the same value of equivalent plastic strain during the second and the third cycles. Keywords: cycles; deformation; doi; groove; plastic; plastic strain; strain; surface
• Damage evolution in marble under uniaxial compression monitored by Pressure Stimulated Currents and Acoustic Emissions by Stavrakas, Ilias; Kourkoulis, Stavros; Triantis, Dimos (2019) - In this direction, the PSC technique was here developed further by using a grid of electrode pairs, aiming to the collection of PSC emissions from multiple sensors. Increasing further the stress level, high energy PSC emissions are recorded approximately at the mid-height of the specimen spreading gradually towards its bases. Keywords: channel; damage; loading; loop; marble; psc; specimen; strain; stress; time; value
• The multilayered soil-structure seismic interaction and structure vibration mechanism by Namdar, Abdoullah (2019) - Based on soil seismic response and structures seismic response mechanism, it is required to investigate the bridge between soil response and structure response. The stiffness and strength modification of the soils were used in the built-up soil foundation and it caused variation of the soil foundation displacement morphology, and also this modification of soil foundation displacement was transferred to the structural elements and each part of the continuous beam faced different morphology of the differential displacement.  Keywords: beam; displacement; doi; ground; interaction; motion; response; seismic; soil; strain; structure; timber
• Analysis of Printed Circuit Boards strains using finite element analysis and digital image correlation by Marsavina, Liviu; Falk, Alexandru; Pop, Octavian (2019) - This aspect can cause a different deformation distribution of PCB components. Development of digital image correlation method to analyses crack variations of masonry wall, Sadhana, 33 (6), pp. Keywords: analysis; case; correlation; dic; element; fig; finite; image; loading; pcb; strain
• Crack coalescence and strain accommodation in gypsum rock by Caselle, Chiara; Bonetto, Sabrina Maria Rita; Costanzo, Daniele (2020) - Figure 7: Micrographs of gypsum sample deformed with a confining pressure of 4 MPa. Figure 8: Micrographs of gypsum sample deformed with a confining pressure of 6 MPa. Keywords: doi; failure; fig; gypsum; mpa; pressure; rock; sample; strain; stress; test
• The study of internal structure of woven glass and carbon fiber reinforced composite materials with embedded fiber-optic sensors by Serovaev, Grigorii; Kosheleva, Natalia (2019) - According to the known studies, influence of embedded optical fibers varies significantly for different kinds of composite materials, types of external loading, orientation of embedded optical fiber to reinforcing fibers and to the direction of loading. Serovaev et alii, Frattura ed Integrità Strutturale, 51 (2020) 225-235; DOI: 10.3221/IGF-ESIS.51.18 226 insignificant change of stiffness of composite materials with embedded optical fibers is usually observed [1–3]. Keywords: bragg; composite; doi; fiber; material; process; reinforcement; resin; sensors; strain; structure
• Finte element modeling of the behavior of polymethyl-methacrylate (PMMA) during high pressure torsion process. by Drai, Ahmed; Aour, Benaoumeur; Belayachi, Naima; Talha, Abderrahim; Benseddiq, Noureddine (2020) - Recommendations on process conditions were Citation: Drai, A., Aour, B., Belayachi, N., Talha, A., Benseddiq, N., Numerical modeling of polymethyl-methacrylate (PMMA)behavior during high pressure torsion process, Frattura ed Integrità Strutturale, 52 (2020) 181-196. Analysis of plastic deformation behavior of HDPE during high pressure torsion process, Eng. Keywords: deformation; doi; hpt; mater; plastic; plastic strain; pmma; pressure; process; sample; strain; temperature; torsion
• Experimental and analytical investigation on the coupled elastoplastic damage model of coal-rock: The investigation on damage model of coal-rock by Shou, Yundong; Zhang, Jianwei; Berto, Filippo (2020) - Coal-rock; Coupled elastoplastic damage model; Damage mechanics; Triaxial compression tests; The deformation prediction of coal- rock. The diameter and length of coal sample were 50mm and 100mm, respectively. Keywords: coal; damage; doi; model; mpa; plastic; rock; strain; stress
• Modeling of mechanical behavior of cork in compression by Saadallah, Younès (2020) - Many studies have focused on the analysis of cork behavior through its parameters such as the Young's modulus, the elastic limit and the stresses corresponding to certain critical strain values [5, 7-9, 11-13]. Figure 5: Linearization of cork behavior in compression at different densities in g.cm-3: a) 0.2340 ; b) 0.2477 ; c) 0.2534). Keywords: behavior; compression; cork; doi; model; parameters; strain; stress
• Inelastic deformation and destruction of fiber-laminated polymer composites in stress concentration zones by Strungar, Elena; Wildemann, Valery (2020) - The objective of this work is the experimental study of regularities of inelastic deformation, the processes of damage accumulation and structure polymer composite materials damage under the condition of non-homogeneous strain fields.      The analysis of composite material damage due to macro-fissure development, the study of developmental prototype fracture surfaces was performed with the use of stereomicroscope Carl Zeiss SteREO Discoverjу. Keywords: analysis; composite; correlation; deformation; doi; fiber; fields; image; size; strain; stress; use
• Mathematical data processing according to digital image correlation method for polymer composites by Lobanov, Dmitriy; Strungar, Elena (2020) - The efficient parameters of mathematical data processing are identified according to digital image correlation method on the basis of building fields for one frame on the surface of laminated fiberglass reinforced plastic at various subset values and at fixed step value. The authors have identified the relation of the chosen parameters of experimental data processing using digital image correlation method with the scaled levels of consideration of composite materials strain processes. Keywords: area; composite; correlation; doi; fields; image; material; non; size; step; strain; surface; system; value
• Investigation of the effect of impact load on concrete-filled steel tube columns under fire by Golsoorat Pahlaviani, Ali; Rousta, Ali Mohammad; Beiranvand, Peyman (2020) - Impact behavior of concrete filled steel tubular stub columns under ISO- 834 standard fire, China Civil Engineering Journal, 4(45), pp. Moreover, the effects of concrete confinement and interactions between steel section and concrete core will be considered [9]. Keywords: columns; concrete; figure; impact; load; loading; section; steel; strain
• Mechanical characterization of different epoxy resins enhanced with carbon nanofibers by Pina dos Santos, Paulo Sérgio; Maceiras, A.; Valvez, S.; Reis, P.N.B. (2020) - Microsoft Word - numero_55_art_15_2943 P. Santos et alii, Frattura ed Integrità Strutturale, 55 (2021) 198-212; DOI: 10.3221/IGF-ESIS.55.15 198 Mechanical characterization of different epoxy resins enhanced with carbon nanofibers P. Santos, A. Maceiras, S. Valvez, P.N.B. Reis University of Beira Interior, Centre for Mechanical and Aerospace Science and Technologies (C-MAST-UBI), Depart. of Electromechanical Engineering, 6201-100 Covilhã, Portugal paulo.sergio.santos@ubi.pt, https://orcid.org/0000-0001-9026-5966 alberto.maceiras@ubi.pt, https://orcid.org/0000-0002-1948-6560 sara.valvez@ubi.pt, https://orcid.org/0000-0001-8285-1332 preis@ubi.pt, https://orcid.org/0000-0001-5203-3670 ABSTRACT. Citation: Santos, P., Maceiras, A., Valvez, S., Reis, P.N.B., Mechanical characterization of different epoxy resins enhanced with carbon nanofibers, Frattura ed Integrità Strutturale, 55 (2021) 198-212. Keywords: bending; carbon; chemical; cnfs; creep; curing; doi; ebalta; epoxy; epoxy resin; matrix; properties; rate; resin; sicomin; strain; stress; wt.%
• Experimental analysis of the state of stress in a steel – titanium perforated plate loaded with concentrated force by Konieczny, Mateusz; Gasiak, Grzegorz; Achtelik, Henryk (2020) - In the literature, there are many works related to the analysis of the state of stress and strain in perforated plates An experimental verification of the mathematical model obtained in [9] is presented in [10], where the methodology of experimental tests was developed, which would allow to determine the value of stresses in perforated plates loaded centrally by concentrated force. Keywords: force; layer; load; plate; steel; strain; stress; titanium
• Experimental study of the Portevin-Le Chatelier effect under complex loading of Al-Mg alloy: procedure issues by Tretyakova, Tatyana Viсtorovna; Tretyakov, Mikhail; Chechulina, Evgeniia (2021) - There is a need to create the scientific basis for predicting the deformation ability and the limiting state of metals and alloys, taking into account R https://youtu.be/Kp_wy6wzpcI T. V. Tretyakova et alii, Frattura ed Integrità Strutturale, 58 (2021) 434-441; DOI: 10.3221/IGF-ESIS.58.31 435 the phenomena of spatial heterogeneity and temporary instability of plastic deformation under given operating conditions. Experimental data show that when the proportional loading process stops even at small values of plastic deformations, further loading leads to the occurrence of inhomogeneous intermittent plastic deformation processes. Keywords: deformation; doi; effect; loading; plastic; strain; tension; torsion
• Strain Energy Density as Failure Criterion for Quasi-Static Uni-axial Tensile Loading by Kusch, Andrea; Salamina, Simone; Crivelli, Daniele; Berto, Filippo (2021) - Samples are characterized by a variability of notch root radii and notch opening angles. In particular, a large variability of notch root radius and notch opening angle was considered. Keywords: control; density; doi; energy; notch; plane; radius; sed; specimens; strain; value
• Fully implicit numerical integration of the Yoshida-Uemori two-surface plasticity model with isotropic hardening stagnation by Fincato, Riccardo; Tsutsumi, Seiichiro; Zilio, Alex; Mazzucco, Gianluca; Salomoni, Valentina (2021) - Assuming to know the back stress   1 1 k nβ of the bounding surface, the radius of the non-IH surface at the n+1 step is approximated with a Taylor expansion as:            2 21 1 1 1, , 3 2 0k k n n n n n ng r rβ q β q (14)                                                             1 1 1 1 1 *, 1 1 *, 1 *, 1 *, 1 1 1 1 1 3 2 3 2 ( ) 2 3 2 3 2 3 k Keywords: doi; eqn; model; strain; stress; surface;  
• A Simplified ALE model for finite element simulation of ballistic impacts with bullet splash – development and experimental validation by Andreotti, Riccardo; Abate, Sergio; Casaroli, Andrea; Quercia, Mauro; Fossati, Riccardo; Boniardi, Marco V. (2021) - [Deg] Inox 1 Inox 2 Inox AVG FEM FEM Vcorrected R. Andreotti et alii, Frattura ed Integrità Strutturale, 57 (2021) 223-245; DOI: 10.3221/IGF-ESIS.57.17 244 CONCLUSIONS he study investigated the effects of bullet splash phenomena with the aim of developing and validating a simplified finite element model to be of practical use in the industry to simulate and optimize the response of protective structural systems subjected to splash bullet impacts. Most of the literature available on ballistic impacts simulation is focused on analyzing and simulating the effects of rigid projectiles impacting on deformable targets, with the aim of estimating the ballistic limit velocity and the modes of failure of the target. Keywords: andreotti; bullet; doi; field; figure; impact; impactor; model; plastic; plate; simulation; strain; strutturale; target
• Periodic homogenization and damage evolution in RVE composite material with inclusion by Benyahi, Karim; Bouafia, Youcef; Kachi, Mohand Said; Benakli, Sarah; Hamri, Amel (2021) - Where their degree of freedom of displacement has a relation with      x xy xz y yz z, , , , , respectively as follows:      − The strain tensor in the principal coordinate system:     22 2 eq 1 2 3+ + + = + + (37) Knowing that the positive part + is defined, such that if  i is the main strain in direction i:  i + =       i Keywords: composite; damage; doi; homogenization; inclusions; matrix; method; model; periodic; properties; rve; strain; volume;  
• DEM investigation on strain localization in a dense periodic granular assembly with high coordination number by Nguyen, Trung-Kien; Vo, Thanh-Trung; Nguyen, Nhu-Hoang (2021) - In the numerical aspect, strain localization inside periodic granular assembly has not been well studied in the literature. To investigate the strain localization phenomenon of periodic granular assembly, we perform biaxial loading with constant lateral pressure and constant axial strain rate as described in the previous section. Keywords: assembly; cohesion; conditions; contact; doi; granular; localization; nguyen; particles; shear; strain
• Analysis of static response of RC beams with NSM CFRP/GFRP rods by Magagnini, Erica; Capozucca, Roberto ; Vecchietti, Maria Vittoria (2021) - Experimental works have been developed by researchers to analyze the static [14,15] and vibration responses of strengthened RC beams in real scale or in small scale Figure 6: Diagrams (a) load, P, vs deflection, δ, and (b) load, P, vs strain of CFRP rod, ɛCFRP, - RC beam B1 with NSM CFRP rod. Keywords: beam; cfrp; concrete; gfrp; nsm; rod; rods; strain
• Finite element modeling of flexural behavior of reinforced concrete beams externally strengthened with CFRP sheets by Madqour, Mahmoud; Fawzi, Khalid ; Hassan, Hilal (2021) - Flexural performance of FRP reinforced concrete beams. The use of Thorenfeldt et al., [29]'s stress-strain model for concrete in compression was found to be effective for FRP reinforced RC beams by El-Tawil et al., [30]. Keywords: beams; cfrp; concrete; element; frp; load; reinforcement; sheets; strain; strength
• Behavior assessment of asymmetrical building with concrete damage plasticity (CDP) under seismic load by Oliveira Batista da Costa, Patrick; Bosse, Rúbia Mara ; Gidrão, Gustavo de Miranda Saleme (2022) - The slabs were modelled as a deformable diaphragm with concrete damage plasticity model as well, in addition, the slab's reinforcements were not considered just as the discontinuity of the diaphragm was also not considered in order to simplify the analysis. A review of research on seismic behaviour of irregular building structures since 2002, Bull. Keywords: analysis; building; concrete; damage; doi; earthquake; figure; integrità; model; seismic; strain; stress; structure
• Microstructure and anisotropic tensile performance of 316L stainless steel manufactured by selective laser melting by Wang, Lin (2022) - On the other hand, the embedded voids or defects resulting in reduced loading bearing area also have a noteworthy influence on the tensile performance of SLM 316L stainless steel specimens. To understand the microstructure and the mechanical properties of additively manufactured 316L alloy, bulk materials were fabricated in longitudinal and transverse directions from which subset tensile specimens were then machine. Keywords: distribution; doi; laser; loading; properties; slm; specimens; ss316l; steel; strain; stress; tensile; transverse; voids; weibull
• Evaluation of Tensile properties of FRP Composite Laminates under Varying Strain Rates and Temperatures by Joshi, Prahlad; Panigrahi, Shrikant (2022) - Tests were conducted at high strain rates of approximately 1000s-1 using direct tension split Hopkinson bar apparatus and quasi-static tests of strain rate approximately 0.0001 s-1 using servo- hydraulic testing machines. [15] investigated the inter-laminar tensile strength and modulus of two material systems namely E-glass/epoxy and Unidirectional Carbon fiber epoxy of 30-32 mm thick plates at high strain rates with SHPB. Keywords: carbon; composites; epoxy; fig; glass; rate; s-1; specimens; strain; strength; temperature; tensile; test
• Experimental and numerical investigation of gap K-joints of rectangular hollow section trusses by Slimani, Faycal; Benzerara, Mohammed; Saidani, Messaoud (2022) - kn: Chord end stress factor for rectangular chord joints. Hollow section joints, Delft, The Netherlands. Keywords: chord; doi; experimental; figure; igf; integrità; joint; load; numerical; ratio; strain
• Numerical study of the plasticity effect on the behavior of short steel columns filled with concrete loaded axially by Boulmaali-Hacene Chaouche, Yousria; Kouider, Nadia; Djeghaba, Kamel; Kebaili, Bachir (2022) - Finite element modeling of circular concrete filled steel tube (CFST), Indian J. Sci. For more than two decades, the construction technique using concrete filled steel tube (CFST) has been widespread throughout the world. Keywords: behavior; columns; concrete; elasto; hardening; model; numerical; plastic; steel; steel tube; strain; strength; tube;  
• Estimation of the nonlinear dependence of the indications of a fiber Bragg grating on temperature and strain from experimental data by Shestakov, Aleksey; Shardakov, Igor; Glot, Irina; Yepin, Valery; Gusev, Georgiy; Tsvetkov, Roman (2022) - Packaging and temperature compensation of fiber Bragg grating for strain sensing: a survey, Photonic Sensors, 8(4), pp. 320-331. Investigation of sensitivity enhancing and temperature compensation for fiber Bragg grating (FBG)-based strain sensor, Optical Fiber Technology, 48, pp. 199-206. Keywords: bragg; doi; fiber; grating; strain; temperature; wavelength;  
• Influence of manufacturing shrinkage and microstructural features on the strength properties of carbon fibers/PEEK composite material by Lomakin, Evgeny; Fedulov, Boris; Fedorenko, Alexey (2022) - Using material model for PEEK without any modifications, the shrinkage was reduced to 3% to capture effect of 0.88% strain at failure. CONCLUSION he material model for PEEK polymer has been provided. Keywords: composite; doi; failure; material; matrix; model; peek; properties; rve; strain; stress; stresses; tension
• Failure analysis of compressed earth block using numerical plastic damage model by Bouhiyadi, Samir; Souinida, Laidi; El hassouani, Youssef (2022) - DESCRIPTION OF THE COMPRESSED EARTH BLOCKS ompressed earth blocks are small masonry units mainly made of raw earth, which are generally parallelepiped in shape, and common dimensions differ from one casting to another, and the drying method used [11]. FINITE ELEMENT ANALYSIS (F.E.M.) OF MECHANICAL CHARACTERIZATION TESTS OF PRE-SELECTED BLOCKS he compressed earth block was manipulated numerically as part of a macro-modeling strategy. Keywords: block; compression; doi; earth; earth block; fig; frattura; integrità; simulation; soil; strain; stress; strutturale; tensile; test
• Compressive behavior of Co-Cr-Mo radially graded porous structures under as-built and heat-treated conditions by Cantaboni, Francesco; Ginestra, Paola; Tocci, Marialaura; Avanzini, Andrea; Ceretti, Elisabetta; Pola, Annalisa (2022) - Different lattice configurations printed at 0° and 90° build angles were considered to investigate the variation in sample properties due to the different orientations of the struts of FCC, DM and DG cells with a radial gradient direction. Of particular interest is the study of complex geometries production, such as lattice structures, which may have a potentially huge field of application, especially for biomedical products. Keywords: doi; fig; heat; laser; lattice; mater; melting; properties; samples; strain; stress; structures
• Structural behavior of Lightweight and High strength Layered Hollow Core Slabs by Ghamry, Asmaa; Esia, Ahmed; Aboul-Nour, Louay (2022) - Reducing loads with increasing %core may be due to decreasing the weight and the volume of concrete in tension zone, where the moment of inertia (E) and the flexural stiffness (EI) of the section are reduced with increasing %core of the LHCS. It can be concluded that increasing %core with percentages of 35.2% of LHCS2 decreases the ultimate deflection and cracking deflection by 41.92% and 48.47%, respectively, when compared with LHCS1, while decreasing %core with percentages of 9.785% of LHCS3 increases the ultimate deflection by 36.67% and increases the cracking deflection by 67.05% when compared with LHCS1. Keywords: bond; concrete; core; cracking; deflection; doi; lhcs; load; ratio; shear; slab; specimens; strain; strength
• Numerical Analysis of Reinforced Concrete Circular Columns Strengthening With CFRP under Concentric and Eccentric Loadings by Harba , Ibrahim; Abdulridha, Abdulkhalik; AL-Shaar, Ahmed (2022) - Microsoft Word - numero_63_art_16_3892.docx I. Harba et alii, Frattura ed Integrità Strutturale, 63 (2023) 190-205; DOI: 10.3221/IGF-ESIS.63.16 190 Numerical analysis of reinforced concrete circular columns strengthening with CFRP under concentric and eccentric loadings Ibrahim S. I. Harba, Abdulkhalik J. Abdulridha, Ahmed A. M. AL-Shaar Department of Civil Engineering, College of Engineering, Al-Nahrain University, Jadriya, Baghdad, Iraq Ibrahim.S.Ibrahim@nahrainuniv.edu.iq, https://orcid.org/0000-0002-5651-0654 abdulkhalik.j.abdulridha@nahrainuniv.edu.iq, https://orcid.org/0000-0001-6403-2325 ahmed.a.mustafa@nahrainuniv.edu.iq, https://orcid.org/0000-0001-6614-2990 ABSTRACT. Behavior of circular reinforced concrete columns confined with CFRP composites. Keywords: cfrp; columns; concrete; confinement; damage; eccentricity; load; model; numerical; ratio; specimens; strain; strength
• Mechanisms for Introduction of Pseudo Ductility in Fiber Reinforced Polymer Composites- A Review by Uppin, Vinayak; Gouda, Shivakumar; I, Sridhar (2023) - Pseudo-ductile hybrid composites with overload sensing capability. Bearing failure of pseudo-ductile composites was examined by double shear–lap bolted joint in tensile mode[39]. Keywords: carbon; composites; doi; ductile; ductility; failure; fiber; hybrid; laminates; m.r; ply; pseudo; science; strain; stress; wisnom
• Predicting the lifetime of CPVC under increasing temperature and crosshead speed by Khtibari, Abderrahim; En-Naji, A; Kartouni, A.; El Ghorba, M. (2023) - By fitting the two different damage laws with the stress method, the varying degrees of damage stages can be accurately identified and A. Khtibari et alii, Frattura ed Integrità Strutturale, 66 (2023) 140-151; DOI: 10.3221/IGF-ESIS.66.08 146 validated. These parameters decrease with increasing temperature and increase with increasing strain rate [13]. Keywords: cpvc; crosshead; damage; doi; material; min; rate; speed; strain; stress; temperature; tensile
• Towards Long-Term Monitoring of the Structural Health of Deep Rock Tunnels with Remote Sensing Techniques by Frenelus, Wadslin; Peng, Hui (2023) - This work identifies and describes relevant structural health problems of deep rock tunnels and the applicability of sensors employed in monitoring systems, based on in-depth searches performed on pertinent research. Results show that over time, deep rock tunnels suffer several typical structural diseases namely degradation of the excavation damaged areas, corrosion of rock bolts and cable bolts, cracks, fractures and strains in secondary lining, groundwater leaks in secondary lining, convergence deformation and damage provoked by the triggering of fires. Keywords: bolts; conditions; convergence; deformation; doi; engineering; fbg; fiber; fire; frenelus; groundwater; health; health monitoring; integrità; lining; monitoring; remote; rock; rock bolts; rock tunnels; sensing; sensors; stability; strain; structures; systems; techniques; temperature; time; tunnel; zhang
• Metastability, adiabatic shear bands initiation and plastic strain localization in the AMg6 alloy under dynamic loading by Sokovikov, Mikhail; Uvarov, Sergey; Simonov, Mikhail; Chudinov, Vasiliy; Naimark, Oleg (2024) - Copyright: © 2024 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. https://youtu.be/bc-7lZ8Aw_g M. Sokovikov et alii, Frattura ed Integrità Strutturale, 68 (2024) 255-266; DOI: 10.3221/IGF-ESIS.68.17 256 INTRODUCTION he extremely localized deformation zones known as adiabatic shear bands (ASB) with a few micrometers wide occur in materials resulting in the dynamic failure in the shear bands The initiation and growth of, and the interaction among, adiabatic shear bands in simple and dipolar materials, Int. Keywords: asb; bands; doi; energy; localization; metastability; microshears; plastic; scaling; shear; strain; wave
• Nonlinearity of mechanical behavior of 3D-reinforced composites under compression by Slovikov, Stanislav; Babushkin, Andrey; Gusina, Maria (2023) - https://youtu.be/wrq6gbLMMbI S. V. Slovikov et alii, Frattura ed Integrità Strutturale, 66 (2023) 311-321; DOI: 10.3221/IGF-ESIS.66.19 312 INTRODUCTION ecently, the innovative development of advanced industries is often associated with the substitutive application of composite materials (CM). 3D structures made of composite materials are used in various industries in the production of critical parts and structural elements. Keywords: behavior; carbon; composite; compression; deformation; doi; function; materials; samples; slovikov; strain; strength
• Compressive study on recycled concrete: experiment and numerical homogenization modelling by Fellah, Djamel; Barboura, Salma; Tilmatine, Thileli; Benyahi, Karim; Kachi, Mohand Said; Li, Jia; Bouafia, Youcef (2023) - Mechanical properties of recycled aggregate concrete under uniaxial loading, Cem. Concr. Development of stress-strain curves for recycled aggregate concrete, Asian J. Civ. Eng. Keywords: aggregates; behavior; concrete; doi; experimental; homogenization; model; mortar; phase; properties; sct; strain; stress
• Enhancement of punching shear behavior of reinforced concrete flat slabs using GFRP grating by Mahmoud, Ahmed; Mostafa, Haitham; Mostafa, Tarek; Khater, Ahmed (2024) - All tested specimens failed in a punching shear failure mode with brittleness, and the specimens with GFRP gratings had a larger punched failure surface than the specimens without GFRP grating. As shown in Fig. 15, the specimen SP07 with GFRP grating dimensions of 800×800×15 mm at the mid-slab thickness exhibited the maximum bottom steel strain. Keywords: concrete; control; doi; failure; gfrp; gratings; load; punching; reinforcement; results; shear; slab; specimen; steel; strain; strength; thickness
• Performance of Reinforced Concrete Flat Slabs Having GFRP Gratings by Mahmoud, Ahmed; Mostafa, Haitham; Mostafa, Tarek; Khater, Ahmed (2023) - Citation: Mostafa, H. M. F., Mahmoud, A.A., Mostafa, T. S., Khater, A. N. M., Performance of reinforced concrete flat slabs having GFRP gratings, Frattura ed Integrità Strutturale, 67 (2024) 240-258. Mahmoud et al.[15- 16] studied experimentally and numerically the behavior of reinforced concrete slabs under punching loads. Keywords: concrete; doi; failure; gfrp; gratings; load; punching; reinforcement; shear; slab; sp01; specimens; steel; strain
• Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade by Kostina, Anastasiia; Zhelnin, Maxim; Swaroop, Sathya; Vedernikova, Alena; Bartolomei, Mariia (2023) - Microsoft Word - numero_67_art_01_4592.docx A. Kostina et alii, Frattura ed Integrità Strutturale, 67 (2024) 1-11; DOI: 10.3221/IGF-ESIS.67.01 1 Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade A. Kostina, M. Zhelnin, A. Vedernikova, M. Bartolomei Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia kostina@icmm.ru, http://orcid.org/0000-0002-5721-3301 zhelnin.m@icmm.ru, http://orcid.org/0000-0003-4498-450X terekhina.a@icmm.ru, http://orcid.org/0000-0003-1069-7887 bartolomei.m@icmm.ru, http://orcid.org/0009-0003-3193-7605 S. Swaroop Vellore Institute of Technology, India n.r.sathya.swaroop@gmail.com, https://orcid.org/0000-0001-9872-811X KEYWORDS. Citation: Kostina, A., Zhelnin, M., Swaroop, S., Vedernikova, A., Bartolomei, M., Finite- element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade, Frattura ed Integrità Strutturale, xx (2024) ww-zz. Keywords: doi; fig; laser; lsp; model; overlapping; plastic; rsd; sample; shock; strain; stress; surface
• Using the wavelet transform to process data from experimental studies of the discontinuous plastic deformation effect by Chechulina, Evgeniia; Trusov, Peter; Gerasimov, Roman; Vildeman, Valeriy; Tretyakov, Mikhail (2024) - Brief literature review Various measurement methods are used to analyze the Portevin – Le Chatelier effect. Deformation diagrams were obtained during uniaxial tension, shear, proportional and nonproportional loading of specimens, the inhomogeneity of strain fields and their rates was shown, illustrating the manifestation of the Portevin – Le Chatelier effect under conditions of complex loading of thin-walled tubular specimens. Keywords: alloy; deformation; diagram; doi; effect; fig; frequency; loading; plc; portevin; signal; specimen; strain; stress; tension; torsion; type; wavelet
• Effectiveness of Partial Wrapping of Stainless-Steel Wire Mesh on Compression Behavior of Concrete Cylinders by Raiyani, Sunil; Patel, Paresh; Prakash, S Suriya (2024) - An experimental program is conducted to understand the behaviour of partially SSWM-confined concrete with changes in the unconfined concrete region between SSWM strips. Gaps between SSWM strips are kept as 30 mm, 60 mm, 90 mm, 120 mm, 150 mm, 180 mm and 210 mm. Keywords: axial; concrete; confinement; cylinder; doi; fig; integrità; raiyani; specimens; sswm; strain; strength; stress; strip; strutturale
• The Axial behaviour of Concrete Filled Double Skinned Steel Tubular (CFDST) column with concrete imperfections by Patel, Arth J. Patel; Purohit, Sharadkumar (2025) - 0,00 0,20 0,40 0,60 0,80 1,00 0,0 0,5 1,0 1,5 2,0 St re ng th I nd ex , S I Gap ratio, χ (%) CS-CFDST SS-CFDST 0,00 0,20 0,40 0,60 0,80 1,00 0,0 2,0 4,0 6,0 8,0 St re ng th I nd ex , S I Gap ratio, χ (%) CS-CFDST SS-CFDST A. J. Patel et alii, Fracture and Structural Integrity, 72 (2025) 1-14 DOI: 10.3221/IGF-ESIS.72.01 12 For insight into the impact of concrete imperfection on peak axial load carrying capacity of CFDST columns with concrete imperfections, a Strength Index (SI) is defined as the ratio of the peak axial load of CFDST column with concrete imperfection to peak axial load of CFDST column without concrete imperfection are evaluated and summarised in Tab. The ductility of CFDST column test specimens was found to decrease with an increase in both types of concrete imperfections (i.e. circumferential and spherical or rectangular). Keywords: cfdst; columns; concrete; gap; imperfection; load; steel; strain; strength; test
• Mechanical testing of miniature carbon fiber reinforced polymer (CFRP) samples under digital light microscopy by Statnik, Eugene; Sadykova, Iu. A.; Prokopev, E. N.; Salimon, A.I.; Nazarov, E. V.; Turbin, N. V.; Korsunsky, A.M. (2024) - Study on Carbon fiber composite materials in sports equipment, Applied Mechanics and Materials, 329, pp. A review of carbon fiber materials in automotive industry, IOP Conference Series Materials Science and Engineering, 971(3), p. 032011. Keywords: carbon; cfrp; composite; damage; doi; fiber; materials; matrix; russia; situ; strain; testing
• Structural behavior of GFRP-concrete composite beams by Shoeib, Ata El-kareim; M. Khalil , Mohammed Abdel-Rahman; Sheriff, Alaa Gamal; Salem, Mohammed (2025) - According to the test results, the compressive and tensile strengths for GFRP composite beams were 75% and 28% respectively lower than conventional reinforced beams at 100°C. A f d d' ' '       2 (3) Nominal moment strength of internal GFRP composite beams The internal strain and stress distribution for the composite beam specimen under flexure at the ultimate limit state is shown in Fig. Keywords: beams; composite; concrete; doi; gfrp; load; section; specimens; steel; stiffness; strain
• Experimental and theoretical study of used GFRP I-profile composite columns by Shoeib, Ata El-Kariem; Salem, Mohammed; Sheriff, Alaa; M. Khalil , Mohammed Abdel-Rahman (2025) - [6] conducted analytical and experimental research on short and long GFRP composite columns, while Lei [7] investigated slender GFRP square hollow columns under axial and eccentric loads and revealed that the compression performance of GFRP columns was significantly affected by the eccentricity and the moment capacity of bolted sleeve joint. , and they consist of the following: Test parameters and specimen details Two main parameters are considered: the effect of GFRP I-section on the behavior of RC composite columns and the effect of fire. Keywords: columns; compressive; concrete; fire; gfrp; load; maximum; mpa; rc columns; steel; strain; strength
• Experimental investigation on mechanical behavior of sandwich structures using Digital Image Correlation (DIC) by Masmoudi, Amina; Khechai, Abdelhak; Bouaziz, Ahmed; Belhi, Guerira; Zeroual, Afaf; Adimi, Yassine (2025) - Sandwich structure, PU, GFRP, Behavior, DIC. Citation: Masmoudi, A., Khechai, A., Bouaziz, A., belhi, G., Zeroual, A., Adimi, Y., Experimental investigation on mechanical behavior of sandwich structures using Digital Image Correlation (DIC), Fracture and Structural Integrity, 73 (2025) 41-58. The design of sandwich structures, with thin, strong skins and a thick lightweight core, provides stiffness in compressive, tensile, bending, and buckling loadings Keywords: compression; dic; doi; edgewise; failure; flatwise; foam; gfrp; load; sandwich; skin; strain; test
• The assessment of the severity of local impact on a pro-bionic composite lattice shell by the use of fiber-optic sensors by Sapozhnikov, Sergei; Dubovikov, Evgeny (2025) - Lattice shell, Local impact, Fiber optic sensor, Thermoplastic protective tab, Residual strain. 10.3221/IGF-ESIS.73.01 1 The assessment of the severity of local impact on a pro-bionic composite lattice shell by the use of fiber-optic sensors S.B. Sapozhnikov South Ural State University (National research university), Chelyabinsk, Russia Central aerohydrodynamic institute (TsAGI), Zhukovsky, Russia sapozhnikovsb@susu.ru, https://orcid.org/0000-0002-7022-4865 E.A. Dubovikov Central aerohydrodynamic institute (TsAGI), Zhukovsky, Russia evgeny.dubovikov@tsagi.ru, https://orcid.org/0000-0001-9402-3649 KEYWORDS. Keywords: composite; contact; fiber; fig; figure; impact; s.b; sapozhnikov; shell; skin; strain; tab
• Experimental investigation of the influence of internal defects (voids, wrinkles) on the shear properties of CFRP by Slovikov, Stanislav; Lobanov, Dmitriy (2025) - D S.V. Slovikov et alii, Fracture and Structural Integrity, 75 (2026) 46-54; DOI: 10.3221/IGF-ESIS.75.05 48 Figure 2: Void and wrinkle defects. However, most studies on CFRP mechanical behavior assume idealized conditions, neglecting defect influence [7,8]. Keywords: cfrp; defects; doi; failure; fiber; shear; specimens; strain; vgn; void; wrinkles
• Coupling crystal plasticity and microstructure in SLM manufactured 316L parts: model development and experimental assessment by Kondratev, Nikita; Shveykin, Alexey; Romanov, Kirill; Mosina , Rinetta; Shishkovsky , Igor; Kharanzhevskiy, Evgeny; Krivilyov, Mikhail (2025) - Cluster analysis apparatus [26] Scattering angle for TC<110> 9,5° Cluster analysis apparatus [26] Fraction associated with uniform distribution of orientations (1– α1 – α2) 0,1 Cluster analysis apparatus [26] Table 2: Experimental data and constitutive model parameters for 316L SS samples with parameter identification techniques and literature sources. It also shows how the identification of model parameters is constructed. Keywords: 316l; data; deformation; doi; experimental; fig; grain; level; material; model; parameters; plastic; samples; slip; slm; strain; stress; stresses; structure
• Optimization of austenitic and ferritic steels for deep drawing. Part 1: metallurgical and mechanical analyses. by Casaroli, Andrea; Scabini, Edoardo; Boniardi, Marco Virginio; Gerosa, Riccardo; Rivolta, Barbara (2025) - he deep drawing process of stainless steel sheet metal represents a fundamental technology for modern industry, thanks to its ability to generate a wide range of high quality and low cost products for applications in the food industry The strain rate also influences the behaviour of stainless steel sheets [8–10] subjected to deep drawing. Keywords: 304; aisi; blank; deformation; doi; drawing; erichsen; figure; holder; lubrication; metal; pressure; punch; sheet; steels; strain; tests
• Modified multi-scale constitutive model of Aluminum: complex loading with variable thermal conditions by Vshivkova, Anastasiya; Shveykin, Alexey; Romanov, Kirill (2025) - 2 ( ) ( ) 0 0 int1 lnk k lattice pA T d     (3) where 0 is lattice resistance at 0 К, while 0p , ( )kA are model parameters.      (5) In (5), in addition to previously introduced symbols: ( )k hard and ( )k recovery are components of strengthening due to dislocation interactions and softening due to diffusion processes; ( )k reversal considers effects related to dislocation annihilation under reverse loading; ( ) threshold k dis is the threshold value of the dislocation component of critical stresses (determined by the initial dislocation density), above which softening due to dislocation interactions and diffusion cannot be neglected; ( )klh is matrix characterizing interactions between different slip systems; l atq is latent hardening coefficient (1.4 for non-coplanar, 1 for coplanar slip systems [19]); ( )δ kl Kronecker delta; sat is saturation stress determined during model identification; a, f, f2, fixDh , a1, a2, s are model parameters; parameter 0 characterizes strain rate above which diffusion processes become ineffective and refT characterizes temperature below which diffusion processes is ineffective too. Keywords: dislocation; doi; k k; loading; model; shear; slip; strain; stress; systems; temperature
• Modified elastic-plastic model: implementation algorithm and comparison of computational efficiency with the elastic-viscoplastic model by Trusov, Peter; Gladkikh, Pavel (2025) - In [22] it is suggested to use the principle of maximum work on shear rates to determine sets of active SSs at each loading step in the framework of elastoplastic model. [13], determination of active slip systems by introducing random disturbances into critical stresses [14], selection of 5 active slip systems based on the amount of their potential energy [15], iterative procedure for the selection of 5 SSs, providing the maximum contribution when expanding the velocity deformation tensor into SS orientation tensors [16], the use of generalized inverse (or pseudoinverse) matrix for solving the system of equations from which shear rates can be determined [11, 17]. Keywords: deformation; doi; k k; model; plastic; rates; shear; slip; step; strain; stress; systems; time

• Research on borehole stability of shale based on seepage-stress-damage coupling model by Ran, Xiaofeng; Wang, Yuezhi; Jia, Shanpo (2013) - In the calculation process, the influence of rock damage to elastic modulus, cohesion and permeability is involved by writing a subroutine for ABAQUS. In the process of rock damage, permeability will change greatly with the fracture producing, extending and connecting [6]. Keywords: damage; drilling; ground; model; permeability; plastic; rock; stress; wall
• A coupled interface-body nonlocal damage model for the analysis of FRP strengthening detachment from cohesive material by Marfia, S.; Sacco, E.; Toti, J. (2013) - Interface damage model without coupling A phenomenological interface model based on the micromechanical idea, developed in [13] and [14], is proposed.  1 max 0, min 1, 1history Y D D D Y           (24) Interface damage models with coupling An interface coupled model, obtained considering different ways of coupling the body and the interface damage, is proposed. Keywords: body; body damage; case; damage; damage model; interface; interface damage; model
• Damage propagation in a masonry arch subjected to slow cyclic and dynamic loadings by Toti, J.; Gattulli, V.; Sacco, Elio (2014) - [mm] Experimental data Damage model 0 =3.0e-005 Damage model 0 =3.5e-005 Damage model 0=4.0e-005 Figure 4: Response of the masonry arch: comparison between the experimental result data and numerical results obtained for different values of the 0 . [Hz] Elastic model Damage model c) 0 50 100 150 200 0 0.05 0.1 0.15 0.2 A [m m ] f Keywords: arch; damage; masonry; mmu; model; numerical
• Prediction of the pull-out strength of chemical anchors in natural stone by Contrafatto, L.; Cosenza, R. (2014) - [6] 20.92 'u efN h f Table 2: Theoretical concrete models for the prediction of the ultimate anchor strength. he comparison between the theoretical results obtained by means of the application of concrete models and the experimental data suggests that two way may be covered. Keywords: adhesive; anchor; concrete; cone; experimental; failure; model; rod; steel; stone; strength; stress
• A simple beam model to analyse the durability of adhesively bonded tile floorings in presence of shrinkage by de Miranda, S.; Palermo, A.; Ubertini, F. (2014) - Although tile floorings guarantee high resistance and durability also in severe exposure conditions, they are prone to suffer from debonding failure, typically induced by differential elongation/shortening between tile layer and substrate. Tile flooring; Tile debonding; Adhesive joint; Elastic foundation. Keywords: adhesive; grouting; model; substrate; tile
• Development of biodegradable magnesium alloy stents with coating by Petrini, Lorenza; Wu, Wei; Gastaldi, Dario; Altomare, Lina; Farè, Silvia; Migliavacca, Francesco; Demir, Ali Gökhan; Previtali, Barbara; Vedani, Maurizio (2014) - [22] Wu, W., Chen, S., Gastaldi, D., Petrini, L., Mantovani, D., Yang, K., Tan, L., Migliavacca, F., Experimental data confirm numerical modeling of the degradation process of magnesium alloys stents, Acta Biomater., 9 (2013) 8730– 8739. Our study required the following steps: i) selection of a Mg alloy suitable for stent production, having sufficient strength and elongation capability; ii) computational optimization of the stent geometry to minimize stress and strain after stent deployment, improve scaffolding ability and corrosion resistance; iii) development of a numerical model for studying stent degradation to support the selection of the best geometry; iv) optimization of the alloy microstructure and production of Mg alloy tubes for stent manufacturing; v) set up, in terms of laser cut and surface finishing, of the procedure to manufacture magnesium stents; vi) selection of a coating able to assure enough corrosion resistance and computational evaluation of the coating adhesion. Keywords: alloy; coating; corrosion; damage; design; element; fig; laser; magnesium; model; optimization; petrini; stent; stress; vessel
• Damage modelling in concrete subject to sulfate attack by Cefis, N.; Comi, C. (2014) - Figure 5: External sulfate attack on a mortar specimen: a) ettringite concentration and b) damage for three different exposure times (200, 400, 600 days) CONCLUSIONS he model developed and implemented in this work allows for the computation of the mechanical response of concrete subject to sulfate attack. Figure 1: External sulfate attack on a mortar specimen: a) sulfate concentration, b) ettringite concentration and c) damage for three different exposure times (200, 400, 600 days). Keywords: attack; cement; concentration; concrete; damage; ettringite; material; model; reaction; sulfate
• Mechanical behavior of a sandwich with corrugated GRP core: numerical modeling and experimental validation by Tumino, D.; Ingrassia, T.; Nigrelli, V.; Pitarresi, G.; Urso Miano, V. (2014) - Another difficulty intrinsic to the adoption of corrugated core sandwiches has been the lack of analytical/numerical tools for the effective prediction of their mechanical response at large scales, essential for designing complex structures (e.g. ships, aircrafts, heavy mass transport structures, etc..). [37] Buannic, N., Cartraud, P., Quesnel, T., Homogenization of corrugated core sandwich panels, Composite Structures, 59 (2003) 299-312. Keywords: analytical; core; element; fig; model; plane; sandwich; shear; stiffness; structures
• Effect of nonlinearity of restrainer and supports on the elasto-plastic seismic response of continuous girder bridge by Changfeng, Wang; Long, Zhu; Xingchong, Chen (2014) - In order to evaluate the effect of nonlinearity of restrainer and supports on the elasto-plastic seismic response of continuous girder bridge, analytical models of continuous girder bridge structure considering the nonlinearity of movable supports, restrainers and bridge piers were built and the nonlinear time history analysis was conducted to evaluate the effect of nonlinearity of restraining devices and supports on the elasto-plastic seismic response of continuous girder bridge. INTRODUCTION he investigations of previous seismic hazards showed that the damage of the bridge piers were not significant if failure occurred at the support, which suggests that the response of supports and bridge pier is interrelated; meanwhile, caging devices play a certain role in distributing the seismic force to each piers and abutments. Keywords: devices; model; movable; piers; restraining; restraining devices; seismic; supports
• Mechanical behaviour of wood T-joints. Experimental and numerical investigation by dos Santos, C.L.; Morais, J.J.L.; de Jesus, A.M.P. (2014) - While the failure at side wood members corresponded to brittle failure modes, the failure at the central member corresponded to ductile failure modes. The load transfer between wood members was assured by means of a steel dowel, which is representative of the most common joining technique applied for structural details in wooden structures. Keywords: behaviour; centre; cohesive; damage; displacement; dowel; failure; fig; joint; member; model; plastic; tab; wood
• Numerical simulation of galvanized rebars pullout by Pereira, H.F.S.G.; Cunha, V.M.C.F.; Sena-Cruz, J. (2014) - “Bond stresses” is the designation ascribed to the shear stresses that arise at the rebar / concrete interface. Nevertheless, alternatively, a more robust non-linear relationship between bond stress and slip can be used. Keywords: behaviour; bond; concrete; model; numerical; pullout; rebar; results; slip; stress
• Improvement of adhesion performance of mortar-repair interface with inducing crack path into repair by Satoh, A.; Yamada, K.; Satoh, M. (2015) - The authors experimentally find out that high modulus fine aggregates in repair material enhance strength of it as well as the strength of the interface repaired with it, compared to the ordinary repair without fine aggregates. - High modulus fine aggregates in repair material enhance strength of it especially in the case of brittle matrix. Keywords: fig; interface; model; repair; strength
• Compliant actuation based on dielectric elastomers for a force-feedback device: modeling and experimental evaluation by Vertechy, R.; Bergamasco, M.; Berselli, G.; Parenti Castelli, V.; Vassura, G. (2012) - Thanks to the large force and power densities, relevant compliance and damping, and low effective inertia and cost, DE actuators are a promising technology for the development of affordable mechatronic and robotic systems that have to interact effectively, efficiently and safely with unstructured environments and humans In particular, as already demonstrated by several proof-of-concept prototypes developed in different research institutes all over the world, DE actuators can be profitably used for the realization of practical force feedback devices such as, for instance, Haptic Interfaces (HI) for immersive virtual reality [4,5]. Keywords: actuator; controller; doi; force; model; position; response; vertechy
• Numerical simulation of dissimilar metal welding and its verification for determination of residual stresses by Szávai, Sz.; Bezi, Z.; Ohms, C. (2016) - 10.3221/IGF-ESIS.36.04 36 Focused on Fracture Mechanics in Central and East Europe Numerical simulation of dissimilar metal welding and its verification for determination of residual stresses Sz. Dissimilar metal welding; Finite element analysis; Residual stress; Phase transformation. Keywords: fig; heat; material; mock; model; steel; stress; stresses; temperature; welding
• Simulation of accelerated strip cooling on the hot rolling mill run-out roller table by Muhin, U.; Belskij, S.; Makarov, E.; Koynov, T. (2016) - The model allows calculation of modes of accelerated cooling strips on run-out roller table continuous wide hot strip mill. Heat loss from strip cooling water, radiation, and interaction with the ambient air are described by the boundary conditions of the second and third kind, and for the difference scheme are given in the following form:         ср T q T T x where: Tsr - ambient temperature; q - heat flux, W/m2; α - heat transfer coefficient, W/(m2×K). Keywords: cooling; heat; metal; model; roller; rolling; strip; table; temperature
• Modelling the mechanical behaviour of metal powder during Die compaction process by Cricrì, G.; Perrella, M. (2016) - [17] Biswas, K., Comparison of various plasticity models for metal powder compaction processes, J. of Material Processing Technology, 166 (2005) 107-115. [15] Smith, L.N., Midha, P.S., Graham, A.D., Simulation of metal powder compaction, for the development of a knowledge based powder metallurgy process advisor, Journal of Materials Processing Technology, 79 (1998) 94-100. Keywords: compaction; density; die; doi; friction; material; metal; model; powder; process; stress; surface
• Theorical study on mechanical properties of AZ31B Magnesium alloy Sheets under multiaxial loading by Znaidi, A.; Daghfas, O.; Guellouz, S.; Nasri, R. (2016) - [14] Znaidi, A., Daghfas, O., Toussaint, F., Nasri, R., Strategy for the identification of anisotropic behavior laws for Ti40 sheets, AMPT2015 Madrid, (2015). [13] Baganna, M., Znaïdi, A., Kharroubi, H., Nasri, R., Identification of anisotropic plastic behavior laws for aluminum 2024 after heat treatment materials from off-axis testing, Toulouse, (2010). Keywords: anisotropy; behavior; criterion; hardening; identification; material; model; plastic
• Numerical study of the response of dynamic parameters to defects in composite structures by Serovaev, Grigorii S.; Matveenko, Valery P. (2018) - Studies of objects with delamination type defects have received considerable attention in scientific literature. The capabilities of using piezoelements for registration of high frequency vibrations are described in [11]. Keywords: contact; damage; defect; delamination; detection; frequencies; frequency; model; size; vibration
• Inverse identification of the material parameters of a nonlinear concrete constitutive model based on the triaxial compression strength testing by Král, Petr; Hradil, Petr; Kala, Ji?í (2016) - Inverse analysis; Optimization; Objective function; Numerical simulation; Nonlinear concrete material model; Experimental data. Financial assistance was also received via project FAST-J-16-3744 Optimization of the parameters of nonlinear concrete material models for explicit dynamics; this instrument was structured and guaranteed by Brno University of Technology to support the Specific University Research. Keywords: analysis; concrete; inverse; material; model; mpa; nonlinear; numerical; optimization; parameters; values
• Numerical analyses of interaction of steel-fibre reinforced concrete slab model with subsoil by Labudkova, Jana; Cajka, Radim (2016) - After creating the model and assigning various properties to the individual layers of subsoil model, which take into account the impact of increasing deformability modulus, a finite element network was created. In the following charts and parts of the parametric study, the vertical deformations calculated in the subsoil models are also included, where subsoil depth exactly equals the depth of the deformation zone. Keywords: concrete; conditions; deformations; depth; foundation; model; slab; space; subsoil; subsoil model
• Experiment and numerical modeling suspended ceiling with identification of working diagram material by Flodr, J.; Sucharda, O.; Mikolasek, D. (2016) - STEEL SUSPENDED CEILING hile solving construction of steel suspended ceiling a special approach was required. Steel material was considered elastic-plastic with linear hardening in Scia Engineer Keywords: analysis; ceiling; diagram; load; material; model; numerical; steel; test; working
• Numerical simulations of tests masonry walls from ceramic block using a detailed finite element model by Salajka, V.; Klouda, J. (2016) - Microsoft Word - numero_39_art_10 V. Salajka et alii, Frattura ed Integrità Strutturale, 39 (2017) 88-99; DOI: 10.3221/IGF-ESIS.39.10 88 Focussed on Modelling in Mechanics Numerical simulations of tests masonry walls from ceramic block using a detailed finite element model V. Salajka Brno University of Technologye, Czech Republic salajka.v@fce.vutbr.cz, http://www.vutbr.cz J. Klouda Technical and Test Institute for Construction Prague, Czech Republic klouda@tzus.cz, http://www.tzus.cz P. Hradil Brno University of Technologye, Czech Republic Hradil.p@fce.vutbr.cz, http://www.vutbr.cz ABSTRACT. Salajka, V., Klouda, J., Hradil, P., Numerical simulations of tests masonry walls from ceramic block using a detailed finite element model, Frattura ed Integrità Strutturale, 39 (2017) 88-99. Keywords: blocks; displacement; elements; figure; masonry; model; results; vertical; walls
• Parametric characterization of a mesomechanic kinematic caused by ondulation in fabric reinforced composites: analytical and numerical investigations by Romano, Marco; Ehrlich, Ingo; Gebbeken, Norbert (2016) - The reason therefore is that the mesomechanic N http://www.gruppofrattura.it/pdf/rivista/numero39/audio/22.mp3 M. Romano et alii, Frattura ed Integrità Strutturale, 39 (2016) 226-247; DOI: 10.3221/IGF-ESIS.39.22 227 geometry of fabric reinforced single layers cannot be considered sufficiently by relatively simple homogenization approaches. [3] investigates the visco-elastic damping in fabric reinforced single layers by FE-calculations. Keywords: amplitude; case; composites; deformation; degree; fabric; fiber; geometric; investigations; kinematic; length; material; model; ondulation; properties; romano; weave
• Continuum damage modeling through theoretical and experimental pressure limit formulas by Majid, Fatima; Elghorba, Mohamed (2017) - Continuum Damage; HDPE; Burst pressure; Life fraction. : Figure 7: Theoretically corrected and adaptive estimation of burst pressure. Keywords: burst; damage; fraction; hdpe; life; model; pipes; pressure;  
• Investigation on the static and dynamic structural behaviors of a regional aircraft main landing gear by a new numerical methodology by Caputo, F.; De Luca, A.; Greco, A.; Maietta, S.; Marro, A.; Apicella, A. (2017) - In this paper, a new methodology supporting the design of landing gears is proposed. Figure 4: Landing gear: a) Multibody model; b) main structural components. Keywords: analysis; doi; fig; figure; gear; landing; landing gear; model; numerical; order; shock
• Maintenance and risk management of rockfall protection net fences through numerical study of damage influence by Luciani, Andrea; Todaro, Carmine; Peila, Daniele (2017) - Microsoft Word - numero_43_art_19 A. Luciani et alii, Frattura ed Integrità Strutturale, 43 (2018) 241-250; DOI: 10.3221/IGF-ESIS.43.19 241 Maintenance and risk management of rockfall protection net fences through numerical study of damage influence Andrea Luciani, Carmine Todaro, Daniele Peila Politecnico di Torino, Torino, Italy andrea.luciani@polito.it, carmine.todaro@polito.it, daniele.peila@polito.it ABSTRACT. Rockfall protection net fences are key protection systems in mountainous areas worldwide to ensure the safety of infrastructures, roads and urban areas. Keywords: analysis; cables; efficiency; energy; fence; model; net; numerical; protection; risk; rockfall
• Design of Experiment as a powerful tool when applying Finite Element Method: a case study on prediction of hot rolling process parameters by Bordonaro, Giancarlo Giuseppe; Leardi, Riccardo; Diviani, Luca; Berto, Filippo (2018) - Hot rolling process; Finite Element Simulation; Design of Experiment; Multi-Criteria Decision Making; Pareto optimality. MATERIAL MODEL he constitutive behavior of the material in hot rolling processes above the recrystallization temperatures (700°C – 1200°C) depends on the type of material (low/high Carbon, alloys), strain rate, and working temperature. Keywords: cross; design; doi; model; process; profile; rolling; rolls; section
• Numerical Simulation Analysis of the Dynamic Mechanical Property of Concrete Based on 3D Meso-mechanical Model by Qin, Fengyan; Cheng, Jingsong; Wen, Heming; Liu, Hongbo (2018) - [8-9], random aggregate model [10-11], and random mechanical property model Then, the authors discussed how the loading speed, aggregate volume content, and aggregate particle size affect the dynamic mechanical properties of concrete. Keywords: aggregate; concrete; content; itz; material; model; mortar; numerical; particle; peak; simulation; size; stress; volume
• A New Viscoelastic Mechanics Model for the Creep Behaviour of Fibre Reinforced Asphalt Concrete by Huang, Chunshui; Wang, Fangtao; Gao, Tao; Gao, Danying (2018) - Creep deformation continues to increase with time elapsing, while the incremental rate of creep deformation keeps constant approximately and the deformation-time curve is a straight line. It can be seen that the fitting curve of the Burgers model during the stage of deceleration creep is below the test curve, and model characterization of FRAC creep deformation is less than the actual deformation. Keywords: creep; deformation; fiber; frac; loading; model; time; viscoelastic
• Research on anchor service life base on grey prediction model by Wang, Xinzheng (2018) - (3) From the predicted results, according to the selected weight loss rate threshold value, under the permanently soaked in water condition, the life of anchor steel bar is the longest, reaching 8.3 years; the life of anchor bar under close and damp condition is 8.2 years; the life of anchor bar under weak acidity aqueous soaking condition is the shortest, only 2.4 X. Z. Wang, Frattura ed Integrità Strutturale, 45 (2018) 100-107; DOI: 10.3221/IGF-ESIS.45.08 106 years. THE ANALYSIS OF GREY PREDICTION Determination of the bearing capacity loss threshold of steel bars n practical engineering, the bearing capacity of steel bars direct influence on the structural safety, therefore, the bear- ing capacity loss rate of the steel bars is taken as the damage criterion. Keywords: anchor; bar; corrosion; data; grey; life; loss; model; prediction; rate; steel; water
• Seismic Behavior Assessment of a Brazilian Heritage Construction by Brandão, Francisco da Silva; Diógenes, Aldecira; Fernandes, João; Mesquita, Esequiel; Betti, Michele (2018) - Seismic analysis Until 2005, the Brazil did not have a seismic code; only in 2006 the “NBR 15421: Design of seismic resistant structures – Procedure” was published [20]. Keywords: analysis; church; direction; doi; earthquake; façade; fig; heritage; masonry; model; mpa; numerical; peak; principal; region; sobral; stress; wall
• Investigation method of borehole collapse with the multi-field coupled model during drilling in clayey silt hydrate reservoirs by Li, Qingchao; Cheng, Yuanfang; Li, Qiang; Wang, Fuling; Zhang, Chuang; Yan, Chuanliang (2018) - Hydrate dissociation occurs only when both temperature and pore pressure satisfy the conditions of hydrate dissociation. On the one hand, hydrate dissociation leads to changes in both the pore pressure and the effective stresses within hydrate reservoir. Keywords: area; bearing; borehole; collapse; dissociation; doi; drilling; hydrate; model; operation; pressure; sediments; temperature; wellbore
• Failure behaviour of a fire protected steel element by Drosopoulos, Georgios; Motsa, Siphesihle (2018) - a) b) Figure 2: a) Unprotected steel structure, with full fire curve on the one flange b) Protected steel structure with fire curve on the fire protection (full curve) and on the steel flange (partial fire curve). Figure 3: a) Unprotected steel structure, with full fire curve on three side faces of the steel b) Protected steel structure with fire curve on the fire protection (full curve) and on the three side faces of steel (partial fire curve). Keywords: analysis; curve; fig; fire; fire protection; model; protection; steel; structure; temperature
• Numerical model of cracking pattern in laminated bamboo specimens under tensile and shear loads by Estrada, Martín; Linero, Dorian L; Takeuchi, Caori P (2019) - Consequently, the scalar relation ( ) ( ) ( ) ( )/ /f f f f ef efA A   is a possible measure of the integrity of the material. The code of LGB material constitutive model was written in Fortran 90 and was included into a version of the open-source program COMET. Keywords: bamboo; constitutive; doi; f f; fibers; guadua; lgb; material; model; numerical; specimen; stress
• Composite sandwich impact response: experimental and numerical analysis by Cucinotta, Filippo; Neri, Paolo; Sfravara, Felice; Razionale, Armando (2018) - Finite Element; Lightweight composites; Sandwich composites; Offshore powerboats; Impact tests. [19] investigated the potentiality in the use of numerical simulations for the analysis of impact tests on composite material. Keywords: bending; carbon; composite; doi; energy; impact; materials; mm2; model; properties; sandwich; specimen; tests
• Brittle Fracture Model Parameter Estimation for Irradiated BCC Material through Dislocation Based Crystal Plasticity Model by Singh, Kulbir; Robertson, Christian; Bhaduri, Arun Kumar (2019) - In view of dislocations mobility being a fundamental property to determine the plastic behavior, the dislocations based material model is proposed, which has the physical rather than phenomenological basis. D K. Singh et alii, Frattura ed Integrità Strutturale, 50 (2019) 319-330; DOI: 10.3221/IGF-ESIS.50.27 321 MATERIAL MODEL he dislocation based material model is developed for BCC materials accounting for 12 slips systems ({110} 1/2<111>). Keywords: bcc; defects; density; dislocation; distribution; doi; irradiation; material; model; plasticity; size; stress; temperature
• Innovative geometric design improves the resistance of simple metal / metal lap joint by Bezzerrouki, Mehadjia (2019) - Most research in this area is aimed at reducing edge stresses and working the central part of the adhesive, which in most cases remains inactive. One note that shear stresses remain almost low than Von-Mises and peel stresses. Keywords: adhesive; joint; layer; length; model; overlap; shear; stresses
• Effect of Environmental Conditions on the Resistance of Damaged Composite Materials by Khiat, Sidi Mohammed Amine; Zenasni, Ramdane; Hamdi, Mawloud (2019) - [11], according to the model proposed by, tensile properties of fiber-reinforced composites are dependent on fiber strength and modulus, strength and chemical stability of matrix and efficiency of fiber/matrix interfacial bond in transferring loads. Tensile failure of fiber composites. Keywords: composite; concentration; doi; fibers; matrix; model; strength; stress
• Multi-level model describing phase transformations of polycrystalline materials under thermo-mechanical impacts by Kondratev, Nikita Sergeevich; Trusov, Peter Valentinovich; Makarevich, Elena Sergeevna (2019) - Microsoft Word - numero_49_art_14_2450 P. Trusov et alii, Frattura ed Integrità Strutturale, 49 (2019) 125-139; DOI: 10.3221/IGF-ESIS.49.14 125 Focused on Russian mechanics contributions for Structural Integrity Multi-level model describing phase transformations of polycrystalline materials under thermo-mechanical impacts Peter Trusov, Elena Makarevich, Nikita Kondratev Perm National Research Polytechnic University, Russia tpv@matmod.pstu.ac.ru, Crystal plasticity; multiscale modeling; phase transformations; microstructure; defect structure; improved steels. Keywords: deformation; doi; element; energy; ii element; level; material; meso; model; phase; phase transformation; scale; step; system; time; transformation
• Numerical analysis of a caprock integrity during oil production by steam-assisted gravity drainage method by Kostina, Anastasiia; Zhelnin, Maxim; Plekhov, Oleg (2019) - Figure 5: Drucker-Prager yield (fracture) surface (contour lines denote effective plastic strains): (a)-solution to thermo-poroelastic problem, pb=2.5 MPa, T=213 K; (b)-solution to thermo-poroelastic problem, pb=3.5 MPa, T=220 K; (c)-solution to thermo- poroinelastic problem with porosity model (17), pb=2.5 MPa, T=213 K; (d)-solution to thermo-poroinelastic problem with porosity model (17), pb=3.5 MPa, T=220 K; (e)-solution to thermo-poroinelastic problem with porosity model (18), pb=2.5 MPa, T=213 K, (f) - solution to thermo-poroinelastic problem with porosity model (18), pb=3.5 MPa, T=220 K. CONCLUSION n this study, an assessment of the caprock integrity during oil production by SAGD is carried out. Alteration of porosity during thermal oil production can significantly affect mechanical state of the reservoir near the caprock. Keywords: caprock; doi; model; oil; parameters; porosity; pressure; production; reservoir; steam; stress; water
• Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra’s urban walls by Puppio, Mario Lucio; Giresini, Linda (2019) - Rocking and kinematic approaches of masonry walls: state of the art and recent developments, Buildings, DOI: 10.3390/buildings7030069. Mechanical characterization of masonry walls with chaotic texture: procedures and results of in-situ tests, Int. Keywords: analysis; collapse; doi; fig; masonry; material; model; parameters; section; soil; strength; tensile; wall
• Quantifying the out-of-plane response of unreinforced masonry walls subjected to relative support motion by Godio, Michele; Beyer, Katrin (2019) - In conclusion, the strategies reported in this study allows quantifying the difference in shift and amplitude between the top and bottom wall support motions in efficient way. In state-of-the-art assessment procedures for the out-of-plane stability of masonry walls any effect of a relative support motion is neglected. Keywords: acceleration; amplitude; configurations; doi; eng; input; masonry; model; motions; phase; plane; shift; study; support; support motions; wall
• Comparison of Two Parameters Models for clay brick masonry confinement by Ramaglia, Giancarlo; Lignola, Gian Piero; Prota, Andrea (2019) - 2 2 2 2 1 2 3 1 2 3 0 1 2 2 3 1 3 0 0, ,H VM m m mf f f f                   (7) The Eqn.  2 1 3 1 1 3 1 1 2 3 0 0 1 2 22 , 3 1 3 1 3 l mc D P m m f f f f f                           (2) Fig. Keywords: confinement; doi; failure; masonry; model; mpa; results; strength; stress
• Structural Evaluation of the DeepCWind Offshore Wind Foundation by Vieira, Mário; Reis, Luís; Vasconcelos, Diogo; Dias, Diogo (2019) - Figure 25: BC analysis with the displacements formulation. Figure 28: BC analysis with the displacements formulation. Keywords: analysis; fig; figure; formulation; frequency; loads; model; mpa; platform; results; structure; wind
• Behavior of precast reinforced concrete columns subjected to monotonic short-term loading by Pereira, Sebastião Salvador Real; Carvalho, Hermes; Dias, João Victor Fragoso; Verga Mendes, Victor Roberto; Montenegro, Pedro Aires (2019) - Microsoft Word - numero_50_art_20_2573 S. R. Pereira et alii, Frattura ed Integrità Strutturale, 50 (2019) 242-250; DOI: 10.3221/IGF-ESIS.50.20 242 Focused on Structural Integrity and Safety: Experimental and Numerical Perspectives Behaviour of precast reinforced concrete columns subjected to monotonic short-term loading S. S. R. Pereira, H. Carvalho, J. V. F. Dias, V. R. Verga M. Federal University of Minas Gerais, Brazil ssrp@dees.ufmg.br, hermes@dees.ufmg.br, joaovfdias@ufmg.br, victor.verga.eng@gmail.com, P. A. Montenegro CONSTRUCT - LESE, Faculty of Engineering, University of Porto – FEUP, Portugal paires@fe.up.pt ABSTRACT. [7] developed numerical models of precast reinforced concrete columns and the results were compared with field test results. Keywords: behaviour; column; concrete; element; limit; model; numerical; pereira; precast; strength; structures
• Rigid block and finite element analysis of settlement-induced failure mechanisms in historic masonry wall panels by Gagliardo, Raffaele; Cascini, Lucrezia; Portioli, Francesco; Landolfo, Raffaele; Tomaselli, Giovanni; Malena, Marialaura; de Felice, Gianmarco (2019) - In the case of rigid block model, when a 40x25 cm block sizes (corresponding to 1.25b  for the FEA) is used, the model is made by an assemblage of 2425 rigid blocks and 28684 contact points, while, when a 25x12 cm block size (corresponding to 0.96b  for the FEA) is adopted, the model consists of 8050 blocks and 95800 contact points. In the case of rigid block model, both the vertical contact cases described in the previous section are considered: the case with the same friction behaviour for the vertical and the horizontal interfaces and the case where the vertical contacts have a friction coefficient equal to zero. Keywords: analysis; analysis type; block; block analysis; block size; case; failure; façade; friction; masonry; model; rbla; settlement; type; type b
• A metallurgical and thermal analysis of Inconel 625 electron-beam welded joints by Romanin, Luca; Ferro, Paolo; Fabrizi, Alberto; Berto, Filippo (2019) - Theoretical and experimental analysis of thermo-mechanical phenomena during electron beam welding process, Comput. In high power density welding technology, a conical source shape with Gaussian power density distribution is often used [7,14]. Keywords: beam; doi; fig; heat; model; numerical; shape; source; temperature; welding
• Multi-parameter analysis of curing cycle for GNPs/glass fabric/ epoxy laminated nanocomposites by Seretis, Georgios; Polyzou, Aikaterini; Manolakos, Dimitrios; Provatidis, Christopher (2019) - Therefore, it is expected that these three factors also affect the mechanical behavior in the case of epoxy matrix nanocomposites. Microwave curing of carbon–epoxy composites: Penetration depth and material characterization, Compos. Keywords: curing; epoxy; glass; increase; model; nanocomposites; performance; regression; temperature; tensile; time
• Prediction of the burst pressure for defective pipelines using different semi-empirical models by Budhe, Sandip; de Barros, S. ; Banea, M. D. (2020) - A variation of burst pressure was found between theoretical prediction and hydrostatic burst test results with respect to the different semi-empirical models even for the same corroded defects. Burst pressure; Metallic pipelines; Remaining strength; Pipeline corrosion; Empirical model; Corroded pipeline. Keywords: analysis; budhe; burst; corrosion; defect; flow; model; pipe; pipelines; prediction; pressure; strength; stress
• Understanding powder bed fusion additive manufacturing phenomena via numerical simulation by Ferro, Paolo; Berto, Filippo; Romanin, Luca (2020) - Denudation of metal powder layers in laser powder bed fusion processes, Acta Mater., 114, pp. Heat transfer simulations of selective laser melting process based on volumetric heat source with powder size consideration, J. Mater. Keywords: additive; alii; bed; doi; ferro; fig; frattura; fusion; heat; igf; integrità; laser; laser melting; manufacturing; material; melting; model; modeling; numerical; parameters; pool; powder; process; scale; simulation; source; stress; strutturale; surface; temperature; thermal; time
• Numerical and analytical simulation of ballistic projectile penetration due to high velocity impact on ceramic target by Moslemi Petrudi, Amin; Vahedi, Khodadad; Rahmani, Masoud; Moslemi Petrudi , MohammadAli (2020) - In other words, due to the ceramic brittle, the higher the cross-sectional area, the higher the surface of the ceramic being broken at the first moment of impact, thus facilitating projectile penetration. The yield stress and ultimate stress of the target: directly penetration the target's resistance to projectile penetration, and in the analytical study of the penetration process it is assumed that at failure, the stress created at the target is equal to the target equal to the stress. Keywords: armor; ceramic; doi; frattura; impact; integrità; material; model; moslemi; penetration; petrudi; projectile; strutturale; surface; target; velocity
• Numerical and Experimental Analysis of Stacking Sequences Effects in Composite Mechanical Joints under Impact Loadings by Fathi, Pourya ; Naddaf Oskouei, Alireza ; Vahedi, Khodadad ; Moslemi Petrudi, Amin (2020) - CHARPY IMPACT TEST mpact loading with the types of Charpy impact test, Izod impact test, Tensile impact test, drop weight test have been investigated in various studies. Figure 1: Fabric used in composite plates. Keywords: -45; -45.00; block; composite; doi; energy; failure; impact; layer; model; results; specimen; strength; tensile; test
• An analytical beam model for the evaluation of crack tip root rotations and displacements in orthotropic specimens by Monetto, Ilaria; Massabò, Roberta (2020) - Explicit and simple expressions for root compliance coefficients, which can be used to define root rotations and root displacements at the crack tip cross section of orthotropic cracked beams, are derived under general self-equilibrated loading conditions at the crack tip. CONCLUSIONS his paper deals with the analytical derivation of root compliance coefficients which can be used to define root rotations and root displacements at the crack tip cross section of orthotropic cracked beams. Keywords: beam; coefficients; compliance; eqn; matching; model; orthotropic; results; root; rotation; shear
• Numerical analysis of underground tunnels subjected to surface blast loads by Nawar, Mahmoud; Ata, Alaa; Nabil, Marwa ; Hassan, Sally (2020) - Blast mitigation effect of the foamed cement-base sacrificial cladding for tunnel structures. 3-D simulation of tunnel structures under blast loading. Keywords: blast; charge; doi; fig; model; pressure; soil; surface; tnt; tunnel
• Experimental and numerical optimization study of shock wave damping in aluminum panel sandwich by Rahmani, Masoud ; Moslemi Petrudi, Amin (2020) - Aluminum foam is one of the most advanced materials and the cost of making aluminum foam according to the required devices and manufacturing process is almost high, so aluminum panels with porous grains can be replaced by aluminum foam in some applications due to lower manufacturing costs. The results show that this material behaves similarly to the aluminum foam in both static loadings (practical pressure testing) and dynamic loading (explosion) results, again similar to aluminum foam. KEYWORDS. Keywords: aluminum; doi; equation; figure; foam; frattura; impact; integrità; material; model; rahmani; shock; specimen; strutturale
• Structural model updating based on metamodel using modal frequencies by Wang, Jutao; Liu, Zhenzhong; Xue, Liju (2021) - Initial value of modal frequencies of experiment and FEM In order to demonstrate the efficiency of the model updating process, based on Kriging model, the five frequencies of the modal experiment are divided into two groups, during model updating. First, the influence of different correlation functions of Kriging model is inspected, followed by the investigation of the approximate capability of Kriging model by inspecting the approximate accuracy of nonlinear functions. Keywords: design; doi; fem; function; kriging; model; optimization; samples; updating
• Development of mathematical model and optimization of GMA welding parameters of IS 2062 grade A steel weldments by Rizvi, Saadat Ali; Ali, Wajahat (2021) - but from Fig. 4 (c) it is very clear on increasing the amount of gas flow rate hardness of weldment first increases and then decreases. Suggested Cubic vs Quadratic 1134.00 4 283.50 7.49 0.0162 Aliased Residual 227.06 6 37.84 Total 9.780E+05 20 48897.50 Table 5: Sequential model sum of square for toughness model. Keywords: arc; gas; hardness; model; parameters; response; toughness; welding; wire
• Reliability assessment of the behavior of reinforced and/or prestressed concrete beams sections in shear failure by Benyahi, Karim; Kachi, Mohand Said; Bouafia, Youcef; Barboura, Salma; Li , Jia (2021) - Efficient procedure for the analysis of reinforced concrete sections using the softened truss model, Master Thesis, Department of Civil Engineering, Federal University of Pernambuco, Recife, Brazil Some applications of reliability analysis for reinforced concrete structures have been reported by (Schlune et al. Keywords: analysis; behavior; benyahi; concrete; doi; integrità; limit; model; reliability; resistance; shear; state; strutturale
• Behavior of Structural Concrete Frames with Hybrid Reinforcement under Cyclic Loading by Sobhy, Asmaa; Aboul Nour, Louay ; Hassan, Hilal ; Elsisi, Alaaeldin (2021) - GFRP bars without any performance degradation can withstand tension-compression cycles. ‐ The GFRP- beam-column joint demonstrated a declining stiffness compared with the standard beam-column joint enhanced by steel. ‐ The hybrid GFRP reinforced joint displayed the lowest rigidity compared with the traditional steel-reinforced joint; however, it displayed greater rigidity compared to the GFRP reinforced joint. ‐ The low elastic modulus of the GFRP reinforcement caused a drop in the total rigidity of this model in operation, resulting in the converging drift ratios being obtained, however at the same time receiving lower forces due to its acting cyclic loading. ‐ GFRP reinforced joints displayed primarily elastic properties with very poor plasticity characteristics while evaluated under cyclic reversed loading. Numerical analysis of reinforced concrete beams pre-cracked reinforced by composite materials, Frat. Keywords: beam; column; concrete; cyclic; doi; drift; gfrp; joint; load; model; reinforcement; steel
• Numerical Assessment of Reinforced Concrete Beams Strengthened with CFRP Sheets under Impact Loading by Emara, Mohamed; Elkomy, Nada; Abdel Kader, Hilal (2021) - (a) (b) Figure 12: Strengthened RC beams with various impact velocities (displacement-time histories) Results have shown that the energy absorption of CFRP laminate beams is lower than that of external steel plate reinforced beams. Keywords: bars; beams; cfrp; concrete; doi; impact; length; loading; model; reinforcement; steel; strength
• Reliability and Reliability-based Sensitivity Analyses of Steel Moment-Resisting Frame Structure subjected to Extreme Actions by Sadeghi, Abbasali; Kazemi, Hamid; Samadi, Maysam (2021) - Hybrid control variates-based simulation method for structural reliability analysis of some problems with low failure probability, Applied Mathematical Modelling, 60, pp. An innovative adaptive sparse response surface method for structural reliability analysis, Structural Safety, 73, pp. Keywords: analysis; doi; failure; frame; impact; kriging; mcs; meta; model; performance; probability; reliability; results; sensitivity; steel; structures; vehicle
• Finite Element analysis of stress state in the cement of total hip prosthesis with elastomeric stress barrier by Fadela , Allaoua; Habib, Lebbal; Abderrahmane , Belarbi (2021) - Hip prosthesis; Cement; Stress concentration; Stress barrier; Finite element method (FEM). About the experimental part, a project is based on the clinical observation that higher subsidence (distal migration) correlates with early revision of hip prostheses to develop a pre-clinical testing platform for cemented femoral hip implants as measured by Maher and Prendergast [14]. Keywords: cement; doi; hip; load; model; mpa; prosthesis; stem; stress
• Reinforced Soft Soil by CSV with/without Polypropylene fibres: Experimental and Numerical analysis. by Souadeuk, Anouar; Boudaoud, Zeineddine (2021) - Citation: Anouar, S., Zeineddine, B., Reinforced soft soil by CSV with/without polypropylene fiber: experimental and numerical analysis, Frattura ed Integrità Strutturale, 59 (2022) 374-395. The experimental results have indicated that the efficiency of the reinforcement of the soft soil by CSV provides satisfying results, namely the less quantity of soft soil on CSV materials (with/without polypropylene fiber) the better the deviatoric stress, axial strain, effective cohesion, effective friction angle, and modulus of elasticity. Keywords: cement; csv; doi; embankment; fiber; figure; integrità; kpa; materials; model; numerical; pressure; results; sand; soil
• Weight optimization of steel lattice transmission towers based on Differential Evolution and machine learning classification technique by Nguyen, Tran-Hieu; Vu, Anh-Tuan (2021) - Transmission towers are tall structures used to support overhead power lines. There are several types of transmission towers in which lattice towers are the most common type. Keywords: -546; adaboost; algorithm; design; doi; method; model; nguyen; optimization; steel; structures; t.-h; towers; transmission; weight
• Evaluating structural safety of trusses using Machine Learning by Nguyen, Tran-Hieu; Vu, Anh-Tuan (2021) - The hyperparameters tuning of ML models is conducted by combining the grid search M T.-H. Nguyen et alii, Frattura ed Integrità Strutturale, 58 (2021) 308-318; DOI: 10.3221/IGF-ESIS.58.23 315 method and k-fold cross-validation. Algorithm Hyperparameters  SVM kernel=’rbf’; C=1000; gamma=0.1 ANN architecture (100-100-100-2); activation=’relu’; solver=Adam; batch_size=5; max_iter=1000 AdaBoost base_estimator=DecisionTreeClassifier; max_depth=2; n_estimators=100; learning_rate=1 Table 3: Hyperparameters of ML models. Keywords: adaboost; algorithms; bar; dataset; doi; learning; machine; model; safety; structure; truss
• A nonlinear concrete damaged plasticity model for simulation reinforced concrete structures using ABAQUS by Le Thanh, Cuong; Minh, Hoang-Le; Sang-To, Thanh (2021) - A DAMAGED MODEL PRESENTED FOR CONCRETE Material parameters for the yield function and plastic flow potential he damaged concrete plasticity model (CDP) is employed in the ABAQUS manual. Damaged models which are based on presenting a novel curve of stress-strain in three dimensions stress can find in reports of. Keywords: beam; c c; concrete; doi; fig; mm2; model; simulation
• The critical influence of some “tiny” geometrical details on the stress field in a Brazilian Disc with a central notch of finite width and length by Kourkoulis, Stavros K; Markides, Christos; Pasiou, Ermioni; Loukidis, Andronikos; Triantis, Dimos (2021) - Brazilian disc; Central notch; Analytical solution; Numerical ana- lysis; Finite elements. Indeed, while the theoretical model considers a relatively short “mathematical” crack (i.e., a discontinuity of short length with respect to the disc’s diam- eter, zero distance between its lips and singular tip) the discontinuities mechanically machined are notches of finite width, without singular tip and of length well comparable to the radius of the disc. Keywords: central; disc; doi; kourkoulis; model; notch; stress
• Mechanical behaviour of sandy soils embankments treated with cement and reinforced with discrete elements (fibres) by Med Bouteben, Yasmine; Zeineddine, Boudaoud (2022) - Ut (cm) S1 S2 S1 S2 S1 S2 S1 S2 0%C+0F 1.38 1.5 3.18 2.69 2.1 2.38 3.33 3.26 3%C 1.64 1.69 2.79 2.70 2.12 2.39 2.99 3.03 3%C+F12 1.67 1.8 2.79 2.68 2.13 2.43 2.98 2.99 3%C+F18 1.68 1.8 2.77 2.70 2.12 2.33 2.96 3.01 6%C 1.66 1.78 2.79 2.69 2.12 2.33 2.98 3.02 6%C+F12 1.68 1.79 2.80 2.67 2.13 2.39 3.04 3.0 6%C+F18 1.68 1.8 2.79 2.68 2.11 2.37 3.01 2.99 M. B. Yasmine, Frattura ed Integrità Strutturale, 60 (2022) 174-186; DOI: 10.3221/IGF-ESIS.60.13 184 Figure 13: [9], employed a Plaxis 3D model to evaluate the damage produced to the geogrid during triaxial tests performed on reinforced sand samples, this model offered a clear explanation of the major cause of the damage by analysing numerical and experimental results. Keywords: behaviour; cement; doi; embankment; fibre; model; road; sand; soil; triaxial
• Effect of beam-column joints flexibility on the seismic response of setback RC buildings designed according to the Algerian seismic code by Rahmani, Abdallah Yacine; Boukhalkhal, Said Hicham; Badaoui, Mohamed (2022) - CASE STUDY Structures description o investigate the joint behaviour and its effect on the overall performance of RC frames, three 6-storey structures were selected from the literature Nonlinear analysis of reinforced concrete frames under cyclic load reversals, Report No. UCB/EERC-88/12, Earthquake Engineering Research Center. Keywords: analysis; beam; buildings; column; concrete; connections; doi; frames; integrità; joints; model; seismic; storey
• Structural and seismic vulnerability assessment of the Santa Maria Assunta Cathedral in Catanzaro (Italy): classical and advanced approaches for the analysis of local and global failure mechanisms by Greco, Fabrizio; Gaetano, Daniele; Leonetti, Lorenzo; Lonetti, Paolo; Pascuzzo, Arturo; Skrame, Aurora (2022) - An effective analysis methodology should include nonlinearities associated to material damage, especially for masonry elements. The analysis on masonry elements comprises visual inspections, flat jack tests, endoscopic tests, and “Darmstadt” tests on the masonry joints. Keywords: analysis; approach; behavior; building; cathedral; concrete; damage; doi; elements; failure; fig; greco; igf; integrità; italian; macro; masonry; mechanisms; model; nonlinear; structures; vulnerability
• Numerical simulation of creep notched bar of P91 steel by Ab Razak, Norhaida; Davies, C. M. (2022) - Figure 1: True stress strain behavior of ex-serviced P91 material tested at 25°C and 600°C Improving the accuracy of high-temperature components' life evaluation methods is critical for rationalizing component design and life management. Influence of constraint on creep stress distribution in notched bars, J. Strain Anal. Keywords: creep; damage; ductility; life; material; medium; model; notch; rupture; stress
• Seismic vulnerability analysis of reinforced concrete frame with infill wall considering in-plane and out-of-plane interactions by Wang, Dan (2022) - Figure 23: IDA regression results on the frame with IP infill wall Therefore, the failure probabilities of the frames with IP-OOP and IP infill walls can be respectively calculated by:        IDA curves of IP infill wall. Keywords: damage; doi; frame; infill wall; interactions; model; oop; structure; vulnerability; walls
• Finite-element study of residual stress distribution in Ti-6Al-4V alloy treated by laser shock peening with varying parameters by Kostina, Anastasiia; Zhelnin, Maxim; Gachegova, Elena; Prokhorov, Alexander; Vshivkov, Aleksei; Plekhov, Oleg; Swaroop, Sathya (2022) - Laser shock peening (LSP) is used to enhance surface quality of the metallic structures by the generation of compressive residual stresses on it. During LSP short high-energy laser pulse generates shock waves which propagation induces compressive residual stresses. Keywords: cm2; depth; doi; effect; fig; laser; lsp; model; peening; pressure; pulse; spot; square; stress; stresses; surface; value
• A review of the application of the simulated annealing algorithm in structural health monitoring (1995-2021) by Ghannadi, Parsa; Kourehli, Seyed Sina; Mirjalili, Seyedali (2023) - Structural damage detection is the central part of SHM systems, consisting of automatic procedures for identifying and quantifying existing damages. Using complex FEM such as Milad Tower (shown in Fig. 1) is not practical for structural damage detection because of the extensive computational workload [35]. Keywords: algorithm; annealing; damage; damage detection; detection; eng; fem; function; ghannadi; identification; method; model; objective; optimization; results; sa algorithm; structures; study; updating
• Numerical nonlinear analysis of RC beans with un-strengthened and CFRP-strengthened opening drilled under service loads within shear zones by Khalaf, Magdy; Aboul-Nour, Louay; Khater, Mahmoud; Ibrahim, Marwa (2022) - SR : Strengthened rectangular opening beam model. SR40 : Strengthened rectangular opening beam model at a service loads level of about 40%Pu. Keywords: beam model; beams; cfrp; circular; concrete; cracking; cracks; failure; loads level; model; opening; opening beam; opening cfrp; opening models; opening strengthening; rc beams; rectangular; service loads; shear; strengthening
• Bearing capacity of mixed soil model by Namdar, Abdoullah; Khodashenas Pelkoo, Mehdi (2013) - Several laboratory experiments are required for developing the soil-mixing model necessary for reliable field application (a rational assessment selecting soil property for improvement of soil bearing capacity should include a logical investigation in laboratory testing method for accurate interpretation of results providing feasible data in field application). The research presented is the state of-the-practice for soil foundation bearing capacity over a wide range of soil foundation improvements. Keywords: bearing; capacity; foundation; model; soil; weight
• Structural Health Evaluation of Arch Bridge by Field Test and Optimized BPNN Algorithm by Xiong, Zhihua; She, Jiachen; Liang, Zhuoxi; Mou, Xulin; Zhang, Yu (2023) - It does well in bridge damage identification, and the WPERSS value is positively correlated with the damage degree. Although many effective methods have been proposed in the field of bridge structural damage identification, most of these methods need to rely on professional equipment or laboratories, the cost of which is unaffordable for less-developed regions. Keywords: arch; bpnn; bridge; damage; data; doi; fig; identification; model; packet; point; signal; test; wavelet; wperss
• Evaluation of seismic mitigation of embankment mode by Namdar, Abdollah (2013) - The third model is loose sandy embankment and loose sandy saturated subsoil made up from composite material (60 % sand and 40 % gravel) confined in geo textile centrally installed on the toe of embankment. Deformation shape of embankment subsoil (up to five seconds, Test A). Keywords: embankment; figure; model; stress; subsoil; test
• Analysis of damage control of thin plate with piezoelectric actuators using finite element and machine learning approach by Anjum, Asraar; Shaikh, Abdul Aabid; Hriari, Meftah (2023) - Modeling approach to evaluating reduction in stress intensity factor in center-cracked plate with piezoelectric actuator patches, J. Intell. Machine Learning Algorithm Applied R-Squared RMSE Quadratic SVM 0.92406 0.013593 Cubic SVM 0.98045 0.006714 Rational Quadratic GPR 0.99738 0.002484 Matern 5/2 GPR 0.99209 0.004331 Exponential GPR 0.97993 0.006696 Squared Exponential GPR 0.99738 0.002484 Table 7: Comparison of Evaluation metrics for various regression models. Keywords: actuator; data; doi; gpr; kernel; learning; machine; model; piezoelectric; plate; regression; results; sif; study
• Damage assessment in beam-like structures by correlation of spectrum using machine learning by Pham Bao, Toan; Le-Ngoc, Vien; Vuong Cong, Luan; Ngo Kieu, Nhi (2023) - Damage identification, Artificial neural network (ANN), Decision Tree, Spectral correlation, Beam-like structure. A predictive model using Machine learning algorithms in the problem of damage identification has been proposed in many studies. Keywords: algorithm; ann; beam; correlation; damage; data; decision; doi; identification; learning; machine; model; network; ngoc; spectral; structures; strutturale; tree; vibration
• Prediction of Mechanical Behavior of Epoxy Polymer Using Artificial Neural Networks (ANN) And response Surface Methodology (RSM) by Saada, Khalissa; Amroune, Salah; Zaoui, Moussa (2023) - Afterwards, the nonlinear functional relationship of input parameters between epoxy sample geometries and sections was established using the response surface model (RSM) and the artificial neural network (ANN) to predict the output parameters of mechanical properties (Young's Modulus and stress). ANN, Mechanical properties, ANOVA, RSM, Epoxy, Geometry. Keywords: ann; doi; epoxy; fig; hole; model; modulus; properties; results; rsm; samples; specimen; stress; tensile; value; young‘s
• Investigations on tool wear behavior in turning AISI 304 stainless steel: An empirical and neural network modeling approach by Chinchanikar, Satish; Gadge, Mahendra (2023) - Dureja [4] created models for tool wear using a CBN tool, observing that cutting speed and feed significantly impact flank wear. [7] to forecast surface roughness and tool wear. Keywords: ann; cutting; data; doi; fig; flank; flank wear; layer; model; network; steel; tool; training; turning; wear
• Computer simulation of stress-strain states in zygomatic bones after complex installation of implants by Dibirov, Timur; Drobyshev, Aleksey; Kharazyan, Eduard; Redko, Nikolay; Pankov, Egor; Kozulin, Alexander; Panin, Sergey; Arutyunov, Sergey (2023) - Microsoft Word - numero_67_art_19_4614.docx T. Diburov et alii, Frattura ed Integrità Strutturale, 67 (2024) 259-279; DOI: 10.3221/IGF-ESIS.67.19 259 Computer simulation of stress-strain states in zygomatic bones after complex installation of implants Timur Dibirov, Aleksey Drobyshev, Eduard Kharazyan, Nikolay Redko, Egor Pankov Maxillofacial Surgery Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Russia rumit.05@mail.ru, https://orcid.org/0000-0003-0876-928X dr.drobyshev@gmail.com, https://orcid.org/0000-0002-1710-6923 edwardkharazian@hotmail.com, https://orcid.org/0009-0008-6750-7080 dr.redko@mail.ru, http://orcid.org/0000-0001-7807-9351 pankov.doc@mail.ru, http://orcid.org/0000-0003-0234-554X Alexander Kozulin Department of Solid Mechanics, Physical-Technical Faculty of National Research Tomsk State University, Russia kozulyn@ftf.tsu.ru, http://orcid.org/0000-0002-2345-6790 Sergey Panin Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia svp@ispms.ru, http://orcid.org/ 0000-0001-7623-7360 Sergey Arutyunov Digital Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Russia sd.arutyunov@mail.ru, http://orcid.org/0000-0001-6512-8724 Citation: Dibirov, T., Drobyshev, A., Kharazyan, E., Redko, N., Pankov, E., Kozulin, A., Panin, S., Arutyunov, S., Computer simulation of stress-strain states in zygomatic bones after complex installation of implants, Frattura ed Integrità Strutturale, 67 (2024) 259-279. Keywords: base; bone; bone tissue; conditions; denture; doi; fig; implant; load; maximum; model; mpa; segments; sss; strains; stresses; tissue; values
• Exploring strength and ductility responses of beam-column joints using UHPC and UHPFRC employing concrete damaged plasticity by Santos da Silveira, Guilherme; Natã Zenatti, Carlos; de Miranda Saleme Gidrão , Gustavo; Mara Bosse, Rúbia; Rogério Novak, Paulo (2024) - The results indicate that UHPFRC joints exhibit superior strength, enhanced ductility, and a distinctive damage progression pattern. that UHPFRC joint showed a cracking pattern indicating flexural failure with vertical flexural damage evident. Keywords: beam; behavior; column; concrete; damage; doi; failure; joints; lsc; model; nsc; strength; stress; uhpc; uhpfrc
• Material choice to optimise the performance index of isogrid structures by Bellini, Costanzo; Berto, Filippo; Di Cocco, Vittorio; Iacoviello, Francesco; Mocanu, Larisa Patricia (2023) - As it comes to isogrid structures, buckling is the most common type of failure. The process parameters and tools for the production of isogrid structures were identified by Bellini and Sorrentino, who subsequently built and tested some samples Keywords: bellini; cfrp; composite; doi; isogrid; material; model; ribs; skin; strength; structure; titanium
• Experimental study and mathematical modelling of face milling forces of high-strength high-viscosity shipbuilding steel by Rusanovskiy, Sergey; Khudyakov , Michael; Kapustina, Natalya (2024) - Due to the lack of statistical data, it is difficult to create a stable analytical model for calculating cutting forces. Verification of the possibility of further increasing the cutting speed requires an additional series of experiments. a) b) Figure 10: xyF cutting force component rate under the constant depth of cut: а) in the cut-up, б) in the cut-down milling process. Keywords: components; cutting; design; doi; fig; force; hull; khudyakov; m.p; machining; milling; model; ntc; process; speed; strutturale
• A Numerical Study on Predicting Bond-Slip Relationship of Reinforced Concrete using Surface Based Cohesive Behavior by Minhajul Bari Prince; Debasish Sen (2024) - However, the traction separation curve is linear up to peak bond stress where the damage initiation started. The analysis revealed that 20 mm and 30 mm mesh sizes showed almost mesh-independent results regarding bond stress vs. slip curves, as shown in Fig. Keywords: bond; bond stress; concrete; damage; doi; element; failure; fig; model; pullout; reference; reinforcement; slip; specimen; splitting; stress
• Enhancing Generalizability of a Machine Learning Model for Infrared Thermographic Defect Detection by Using 3D Numerical Modeling by Vavilov, Vladimir; Chulkov, Arsenii; Moskovchenko, Alexey (2024) - NUMERICAL SIMULATION n this study, the viability of training defect detection models by using IR thermographic data derived from numerical simulations will be assessed. The obtained 3D IR thermographic sequences were then transformed into 2D matrices of feature vectors for model training and testing purposes. Keywords: data; datasets; defect; doi; heat; learning; machine; model; noise; performance; temperature; test; thermographic; training; validation; variability
• Modeling turning performance of Inconel 718 with hybrid nanofluid under MQL using ANN and ANFIS by Kulkarni, Paresh; Chinchanikar, Satish (2024) - 10 No of fuzzy rules 27 Weight of rules 1 No of nodes 78 No of linear parameters 27 No of non-linear parameters 27 No of training data pairs 15 Table 4: ANFIS model parameters. ANN parameter Characteristics Type of network Feed-forward backpropagation Type of training function TRAINLM Type of learning function LEARNGDM Performance function MSE (Mean Squared Error) Number of hidden layer(s) 1 Number of neurons on hidden layer 10 Number of epochs (max) 1000 Learning rate 0.001 Rate of train data (random) 70% Rate of test data (random) 30% Learning algorithm Levenberg-Marquardt backpropagation technique Transfer function Tansig (tangent sigmoid) Table 3: ANN model parameters and system configuration in the construction and analysis. Keywords: anfis; ann; cutting; data; doi; error; force; inconel; input; layer; life; machining; membership; model; network; parameters; roughness; surface; tool; training
• Application of deep learning for technological parameter optimization of laser shock peening of Ti-6Al-4V alloy by Verezhak, Mikhail; Vshivkov, Aleksei; Gachegova, Elena; Bartolomei, Maria; Mayer, Alexander; Swaroop, Sathya (2024) - The error in the quantitative calculation of surface stresses and residual layer penetration depth is much higher than for maximum residual stresses. For example, the authors of [9] applied this algorithm to predict the mechanical properties (roughness, microhardness and residual surface stresses) of stainless steel subjected to shot blasting. Keywords: ann; data; depth; doi; layer; model; network; number; parameters; peening; shock; stresses; training
• Tool wear evaluation of self-propelled rotary tool and conventional round tool during turning Inconel 718 by Chinchanikar, Satish; Motgi, Nitin (2024) - This study found that cutting speed had the largest impact on tool flank wear, with machining time, feed, and depth of cut following closely behind. The cutting speed had the largest impact on tool flank wear, with machining time, feed, and depth of cut following closely behind. Keywords: ann; crts; cutting; doi; edge; experimental; flank; flank wear; inconel; machining; model; sprts; tool; turning; wear
• Elastic-viscoplastic deformation models of salt rocks by Baryakh, Alexander; Tsayukov, Andrey (2024) -    trial vol vol ˆD N , 0 ˆ , 0 e n n n t t                R A R A         (31) where the backbone stress function is trial trialˆ ( , , , )n n n t t t t         P       (32)          A A A          (3) The corresponding sets of internal state parameters { , }, { , }c c  A A  (4) where c is the cohesion,  is the frictional angle, and  is the dilatancy angle. Keywords: creep; criterion; doi; model; n t; stress; t t; yield
• A digital twin framework with MobileNetV2 for damage detection in slab structures by Nguyen, Huong Duong; Nguyen, Huan; Gao, Xiaohong (2025) - The deep learning and digital twin model introduced within this work demonstrates the application of the SHM strategy. A neural network based digital twin model for the structural health monitoring of reinforced concrete bridges, Structures, 57. Keywords: cnn; damage; data; digital; doi; learning; mobilenetv2; model; nguyen; severity; slab; structure; twin; wavelet
• Numerical study of residual stress fields after double-sided symmetric laser shock peening of blade edge by Bartolomei, Mariia L.; Kudryashev, Igor S.; Sabirov, Rustam R.; Korsunsky, Alexander M. (2025) - Citation: Bartolomei, M., Kudryashev, I., Sabirov, R., Korsunsky, A., Numerical investigation of residual stresses on a thin blade edge after double-sided symmetric laser shock peening, Frattura ed Integrità Strutturale, 72 (2025) 26-33. In order to achieve optimal distribution of residual stress, it is necessary to accurately select the parameters of the laser pulse impact. Keywords: circle; doi; laser; lsp; model; numerical; peening; pressure; shock; stresses; surface
• Flood-induced load effects on real-scale structures: a 3D multilevel dynamic analysis by De Maio, Umberto; Greco, Fabrizio; Lonetti, Paolo; Nevone Blasi, Paolo; Sgambitterra, Girolamo (2025) - These indicators help to quantify the probability of structural damage or degradation following such an event. Analysis reveals that structural damage reaches its highest value of approximately 0.62 during the period when the fluid flow stabilizes (Point C) rather than at the moment of peak pressure (Point B). Keywords: analysis; approach; buildings; damage; doi; flow; fluid; load; masonry; model; pressure; response; scale; structure; time; vulnerability; water
• An innovative analytical approach for predicting the fundamental time period of moment-resisting frames by Sharaf, Eman; Eraky, Atef; Emad, Shimaa; Salama, Abdallah (2025) - Fundamental period equations for plan irregular moment-resisting frame buildings. CONCLUSIONS t has been observed that many forms of fundamental vibration period equations with varying period predictions have been found in the literature, ranging from complex to simple. Keywords: analysis; building; concrete; doi; equation; fem; frame; h h; height; mass; model; number; period; results; seismic; stiffness; structural; vibration;  
• Failure prediction of T-peel adhesive joints by different cohesive laws and modelling approaches by Pirondi, Alessandro (2013) - On the other hand, it is known [11] that in very thin adhesive layers as in the present case plasticity is strongly confined and due to this, the value of m of an ACZ model increases with decresing adhesive layer thickness. Adhesive joints, Fracture, Cohesive zone modeling. Keywords: acz; adhesive; dcb; joint; law; model; parameters; peel
• An approach for the modeling of interface-body coupled nonlocal damage by Marfia, S.; Sacco, E.; Toti, J. (2013) - Interface damage; Body damage; Coupled model; FRP strengthening. ,0 ,  indicates the scalar product, N is the outward versor normal to the domain 1 in correspondence of the interface  , k̂ is the interface stiffness, ,k  is the surface-domain interaction parameter and c is the viscosity parameter of interface damage. Keywords: body; body damage; damage; interface; interface damage; model

• Carbon nanotubes cement composites by Ferro, Giuseppe; Tulliani, Jean-Marc; Musso, Simone (2013) - On the other hand, carbon nanotubes have many advantageous mechanical and electrical properties such as high strength, high conductivity and, therefore, are attractive for producing fiber-reinforced concrete. Moreover, carbon nanotubes can bear torsion and bending without breaking. Keywords: carbon; cement; cnts; composites; concrete; ferro; materials; mwcnts; nanotubes; properties; strength
• A micromechanical four-phase model to predict the compressive failure surface of cement concrete by Caporale, A.; Luciano, R. (2014) - -0,12 -0,10 -0,08 -0,06 -0,04 -0,02 0,00 -0,12 -0,10 -0,08 -0,06 -0,04 -0,02 0,00  e 2  (G P a)  e  (GPa)   = 0.8, f v,eq = 30, f v,m = 10, 20   = 0.7, f v,m = 0, f v,eq = 30, 40, 50   = 0.8, f v,m = 0, f v,eq = 30, 40, 50 f v,eq , f v,m Figure 3: Failure curves in bi-axial compression. -0,12 -0,10 -0,08 -0,06 -0,04 -0,02 0,00 -0,12 -0,10 -0,08 -0,06 -0,04 -0,02 0,00  e 2  (G P a)  e  (GPa)   = 0.7, f v,m = 0, f v,eq = 40,  e 3 = 0  e 3   = 0.7, f v,m = 0, f v,eq = 40,  e 3 = 0.01 GPa   = 0.7, f v,m = 0, f v,eq = 40,  e 3 = - 0.01 GPa   = 0.8, f v,m = 10, f v,eq = 30,  e 3 = 0   = 0.8, f v,m = 10, f v,eq = 30,  e 3 = 0.01 GPa   = 0.8, f v,m = 10, f v,eq = 30,  e 3 = -0.01 GPa Figure 5: Failure curves in bi-axial and tri-axial compression. Keywords: cement; concrete; f v; paste
• Limit analysis on FRP-strengthened RC members by De Domenico, D.; Pisano, A.A.; Fuschi, P. (2014) - Precisely, to simulate the behaviour at a state of incipient collapse of the three main constituent materials, concrete is described by a Menétrey–Willam-type yield criterion endowed with cap in compression, steel reinforcement bars are handled by the von Mises yield criterion, FRP strengthening laminates are governed by a Tsai–Wu- type criterion and the quoted methodology is applied in concomitance to the three yield criteria. The reason for computing two bounds arises from the postulated non associativity of concrete and FRP composite material that injects such characteristic on the behaviour of the whole RC-structural element. Keywords: analysis; bars; beams; collapse; concrete; elements; frp; limit; load; stress; yield
• Numerical modelling of reinforced concrete beams with fracture-plastic material by Sucharda, O.; Brozovsky, J. (2014) - The purpose of the paper is to use of a model of concrete for modelling of a behaviour of reinforced concrete beams which have been tested at the University of Toronto within re-examination of classic concrete beam tests. Microsoft Word - numero_30_art_45 O. Sucharda et alii, Frattura ed Integrità Strutturale, 30 (2014) 375-382; DOI: 10.3221/IGF-ESIS.30.45 375 Focussed on: Fracture and Structural Integrity related Issues Numerical modelling of reinforced concrete beams with fracture-plastic material O. Sucharda, J. Brozovsky VSB-TU Ostrava, Faculty of Civil Engineering oldrich.sucharda@vsb.cz, jiri.brozovsky@vsb.cz ABSTRACT. Keywords: analysis; beam; concrete; modelling; models; numerical; stochastic
• Natural minerals mixture for enhancing concrete compressive strength by Namdar, Abdoullah (2012) - The kaolin and bentonite have been mixed in equal quantity and treated by heat for 1 hour under 600 ºC, 800 ºC and 1000 ºC to create new minerals under high temperature condition to introduce an acceptable concrete additive for achieving concrete compressive strength in early age. And also fly ash, bottom ash and coarse aggregate mechanical properties and quality are evaluated for enhancement of concrete compressive strength Keywords: additive; cement; compressive; concrete; strength
• Implementation of a damage model in a finite element program for computation of structures under dynamic loading by Oudni, Nasserdine; Bouafia, Youcef (2015) - The nodal displacements decrease after 7.5 s.   Figure 6: Damage evolution, tD and cD . The results are, first the response of gravity dam subjected to seismic loading as displacements history, secondly the history of the evolution of integration points damage at the cracked or damaged zone. Keywords: concrete; damage; earthquake; material
• Effect of steel reinforcement with different degree of corrosion on degeneration of mechanical performance of reinforced concrete frame joints by Xu, Wu; Ronggui, Liu (2015) - It has been found that, steel reinforcement corrosion is the leading cause for function degeneration of old building structure Besides decrease of mechanical property, performance of steel reinforcement corrosion also includes cracking and even spalling of concrete, weakening of bound stress and decrease of adhesive property. Keywords: concrete; corrosion; displacement; joints; rate; reinforcement; steel; stress
• Improvement of performance of ultra-high performance concrete based composite material added with nano materials by Jinchang, Pang; Ronggui, Liu (2016) - In quantitative analysis of hydration product of cement based material, α - Al2O3 which is not contained in original paste, keeps stable at room temperature and cannot react with components of cement paste is used as addition phase. Sample of cement based composite material with multiple phases and complex diffraction xrd pattern will bring great difficulty to quantitative analysis due to severely overlapped spectral peak and preferentially orienting effect. Keywords: analysis; cement; concrete; hydration; material; nano; performance; phase; sio2; specimen; strength; test; uhpcc
• Analysis of time-dependent reliability of degenerated reinforced concrete structure by Hongping, Zhang; Lili, Zhang; Zhengbing, Xia (2016) - [11] proposed a time-dependent reliability model of reinforced concrete structure after finding the significant changes of reinforced concrete structure resistance along with the extension of time under corrosion environment and then applied the model for predicting the service time of structure. As to another innovation point, this study gave uncertainty statistical parameters of reinforced concrete structure resistance based on the detailed introduction of degenerated reinforced concrete resistance decrease model and made an analysis on the rules of resistance decrease of corroded bending element. Keywords: analysis; concrete; element; reinforcement; reliability; resistance; structure; time; value
• Mechanical behaviour and durability of high volume fly ash cementitious composites by Haider, Usman; Bittnar, Zdenek; Kopecky, Lubomír; Bittnar, Petr; Nemecek, Jiri; Ali, Asif; Pokorny, Jaroslav (2016) - Specific surface areas of raw fly ash, second layer, and third layer presented in Tab. 1, showing that second layer particles have 100% larger specific surface area compared to that of raw fly ash particles, and 73% larger specific surface area compared to cement particles. High volume fly ash cementitious composites containing second or third layer particles are tested under compression and bending, highlighting a higher strength and ductility in comparison to cementitious ones containing raw fly ash particles. KEYWORDS. Keywords: ash particles; cement; chemical; coal; concrete; doi; fig; fly ash; layer; layer particles; properties; raw; samples; size; specimens; strength; volume; water
• Delamination of carbon-fiber strengthening layer from concrete beam during deformation (infrared thermography) by Shardakov, I. N.; Shestakov, A. P.; Bykov, A.A. (2018) - Microsoft Word - numero_38_art_43 I. N. Shardakov et alii, Frattura ed Integrità Strutturale, 38 (2016) 331-338; DOI: 10.3221/IGF-ESIS.38.43 331 Delamination of carbon-fiber strengthening layer from concrete beam during deformation (infrared thermography) I. N. Shardakov, A. P. Shestakov Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Korolev str., 1, Perm, 614013, Russia. The present work describes the results of experimental studies on the load- carrying capacity of concrete beams strengthened with carbon fiber reinforced plastic (CFRP). Keywords: beams; cfrp; concrete; debonding; delamination; frpr; loading; series; strengthening
• An experimental study on mechanical properties of fiber-reinforced concrete of energy piles by Zhao, Songying; Chen, Lei; Fu, Yan (2017) - In this test, three groups of concrete test piles are made and three identical concrete piles are made in for each set group. It can be seen from the figure that the theoretical strength of the second and third groups of test piles is supposed to be 97.5% of the theoretical strength of the first group. Keywords: concrete; fiber; group; heat; material; pile; strength; test
• Fracture toughness and failure mechanism of high performance concrete incorporating carbon nanotubes by Khitab, Anwar; Ahmad, Sajjad; Khushnood, Rao Arsalan; Rizwan, Syed Ali; Ferro, Giuseppe Andrea; Restuccia, Luciana; Ali, Mustajab; Mehmood, Imran (2017) - Through above results, which verify the increase in concrete mix strength after adding MWCNTs, these MWCNTs may be incorporated in the treatment of Nano/micro cracks completed through process of connecting, branching and pinning. V   (1) 0.41t b fc fc  (2) where, t fc is the tensile strength of the reinforced composite, l is the coefficient of MWCNTs length, o is the orientation coefficient of MWCNTs, cL is average MWCNTs length, cd is the average MWCNTs diameter,  is average bonding strength and cV is the volume fraction of MWCNTs in the matrix and b fc is the flexural strength of the MWCNTs reinforced concrete. Keywords: carbon; cement; composites; concrete; doi:10.1016; mater; mix; mwcnts; nano; performance; properties; strength
• Experimental evaluation of steel fiber effect on mechanical properties of steel fiber-reinforced cement matrix by Jadidi, Ali; Amiri, Milad; Zeighami, Ehsanollah (2017) - Since then, countless researches and industrial applications have been carried out on steel fiber reinforced concrete [2]. All the specimens were cured for the period of 3, 7 and 28 days before crushing the result of fibers reinforced concrete 3 days, 7 days, and 28 days curing with varied percentage of fiber were studied and it has been found that there is significant strength improvement in steel fiber reinforced concrete. Keywords: concrete; d=50; day; fibers; samples; steel; steel fibers; strength; tensile
• Experimental study of the effect of water-cement ratio on compressive strength, abrasion resistance, porosity and permeability of Nano silica concrete by Rahmani, Kamal; Rahmanzadeh, Belal; Piroti, Saber (2018) - The effect of water-cement ratio on abrasion resistance, porosity and hydraulic conductivity coefficient of Nano silica concrete has been studied in this research (paper). Decreasing the water-cement ratio from 0.46 to 0.30 improves the abrasion resistance of Nano silica concrete by 42%, the hydraulic conductivity coefficient of concrete decreases from 28.5⤬10-15 to 1.7⤬10-15 m/s and the porosity of concrete decreases to 13.1%. Keywords: abrasion; cement; cement ratio; concrete; nano; ratio; resistance; silica; strength; water
• Influence of limestone dust and natural pozzolan on engineering properties of self-compacting repair mortars by Ghrici, Mohamed; Choucha, Said; Ghrici, Mohamed; Omran, Ahmed (2018) - Mixture proportions In order to evaluate the influence of local mineral admixtures on the properties of repair mortar (SCRMs), Two types of mortar mixtures containing 10% LD and 20% NP as partial OPC replacements were prepared in comparison with a control mortar (Tab. 2). The fresh unit weight of repair mortars was determined according to EN 1015-6 [25]. Keywords: cement; concrete; days; doi; materials; mix; mortar; properties; repair; scrm-20np; self; strength; subc
• Experimental Research on the Instantaneous and Long-Term Deflections of Pre-Cracked Concrete Beams Enhanced by Carbon Fibre Reinforced Polymer by Jiang, Shiyong; Cai, Tao; Wu, Shijuan; Yao, Weilai (2018) - Experimental study of flexural fatigue performance of reinforced concrete beams strengthened with prestressed CFRP plates, Engineering Structures, 127, pp. Experimental study on the creep of reinforced concrete beams strengthened with carbon fiber cloth, Hunan University. Keywords: beams; concrete; cracking; cracks; deflection; loading; pre; term; test
• Blending Ratio of Recycled Aggregate on the Performance of Pervious Concrete by yao, yanya (2018) - Mix design for pervious recycled aggregate concrete, Int J Concrete Struct Mater, 6(4), pp. 239-246. Structural, material, mechanical and durability properties and behaviour of recycled aggregates concrete, J. Build. Keywords: aggregate; coarse; compressive; concrete; permeability; porosity; rate; replacement; strength; water
• Stress performance of embedded carbon fiber reinforced plastics plate consolidated reinforced concrete structure by Zhu, Hua (2018) - CFRP plate reinforcement includes the mutual contact of three materials, i.e., contact between CFRP plate and binding materials and contact between binding materials and concrete. In this study ANSYS was used for simulating and analyzing embedded CFRP plate consolidated reinforced beams. Keywords: beams; cfrp; cfrp plate; concrete; element; failure; performance; plate; reinforcement; shear; strengthening
• Assessment of RC Bridges integrity by means of low-cost investigations by Stochino, Flavio; Fadda, Maria Luisa; Mistretta, Fausto (2018) - The same approach should be applied to concrete bridges networks. CONCLUSIONS n this paper the application of a new method for fast and low-cost condition rating mark for RC bridge network has been described. Keywords: bridge; concrete; condition; damage; doi; integrità; method; stochino; strutturale
• Experimental study on the mechanical behavior of RPC filled square steel tube columns subjected to eccentric compression by Hao, Wenxiu; Xu, Xiao; Niu, Zhiqiang (2018) - In order to study the mechanical behavior of reactive powder concrete (RPC) filled square steel tubular columns, this paper designs an eccentric compression experiment for 12 specimens of RPC filled square steel tubular columns and studies the effects of failure form, load-displacement curve, slenderness ratio, steel ratio and eccentricity ratio of an eccentrically loaded columns on its mechanical behavior. The results show that, the failure form of the eccentrically loaded RPC filled square steel tubular column shows local buckling failure. Keywords: bearing; capacity; columns; concrete; ratio; results; rpc; specimens; steel
• Experimental study on concrete damage location by Computerized tomography and Acoustic Emission technology by Liu, Jinghong; Xie, Jian; Liu, Yongjian; Shi, Panfei (2018) - Meanwhile, a large number of concrete CT tests were carried out in China, and abundant research results were obtained: academician Chen Houqun using CT real time scanning to observe the meso failure process of concrete under the uniaxial compression, then the whole process CT images of internal meso cracks from initiation, expansion to coalescence was got, finally, quantitative analysis methods based on concrete CT images was established in the cracks area. The rapid increase of concrete pore volume and damage variable can be the precursor of concrete damage. Keywords: concrete; cracks; damage; images; liu; loading; process; scanning; specimens; test
• Considerations over the Italian road bridge infrastructure safety after the Polcevera viaduct collapse: past errors and future perspectives by Bazzucchi, Fabio; Restuccia, Luciana; Ferro, Giuseppe (2018) - Bridge collapse; Existing infrastructural constructions; Prestressed concrete failure; Bridge robustness; Innovative monitoring. Repair of concrete bridges. Keywords: alii; bazzucchi; bridge; cables; collapse; concrete; damage; deck; doi; esis.46.37; fig; figure; frattura; igf; integrità; polcevera; prestressing; steel; structure; strutturale; system; viaduct
• Analysis of mechanical properties of transition segment of road and bridge based on high-strength foam concrete by Cao, Hongmei (2019) - Back filling of foam concrete behind abutment is a good method of treatment. Foam concrete; Transition section of road and bridge; Settlement difference; Back filling behind abutment; Mechanical properties. Keywords: abutment; analysis; bridge; concrete; foam; foam concrete; load; road; section; settlement; strength; transition
• Finite Element Analysis and ANFIS investigation of seismic behavior of sandwich panels with different concrete material in two story steel building by Jafari, Faezeh; Badarloo, Baitollah (2019) - Sandwich concrete panels consist of three basic components including wires, insulating layer and concrete cover. For example, Metelli et al in 2011 investigated the numerical behavior of concrete sandwich panels with glass fiber-composite connectors with the aim of focusing on the stresses and deformations caused by dead load, thermal actions and shrinkage [3]. Keywords: acceleration; anfis; behavior; building; concrete; displacement; doi; frame; layers; modulus; panels; sample; sandwich; sandwich panels; shotcrete; steel; young
• Carbonization Resistance of Reinforced Concrete under Bending Load by Liu, Yan; Ren, Jun; Li, Zhongxian; Gao, Qiuli; Zhao, Shengli (2019) - To quantify the effect of bending-tension stress on concrete carbonization, the carbonization influence coefficient of bending-tension stress is defined as follows: Y. Liu et alii, Frattura ed Integrità Strutturale, 49 (2019) 714-724; DOI: 10.3221/IGF-ESIS.49.64 721 t t n X K X  (3) where Kt is the carbonization influence coefficient of bending-tension stress, Xt the carbonization depth of concrete under bending load in the tension zone; and Xn the carbonization depth of concrete without any load in the tension zone. Meanwhile, to study the relationship between the carbonization damages in the bending-tension zone and the bending-compression zone of concrete test blocks, a carbonization influence coefficient of bending tension-compression load was proposed, which provides a convenient and scientific guidance for the detection and evaluation of concrete carbonization damages in practical engineering. Keywords: ash; bending; bending load; carbonization; carbonization influence; coefficient; compression; compression load; concrete; fly; load stress; stress; tension
• Reliability-Based Design of Reinforced Concrete Beams for Simultaneous Bending, Shear, and Torsion Loadings by Jafari, Faezeh; Akbari, Jalal (2019) - On the other hand, the estimation of safety indexes is independent of any regulation. Next, the limit state equations in ACI standard were used, and safety indexes were calculated. Keywords: aci; bending; beta; concrete; design; factors; index; indexes; load; resistance; safety; shear; torsion
• Experimental uncertainty budget for concrete compressive strength test based on a multifactorial analysis by Gavela, Stamatia; Nikoloutsopoulos, Nikolaos; Papadakos, George; Passa, Dimitra; Sotiropoulou, Anastasia (2019) - Figure 4: Effect of the specimen curing age on compressive strength test results: (a) for samples with W/C = 0.45 and CC = 360kg/m3 and for ages from 7 to 31 days (the line shows the partial application of Eq.(1) as resulted from experiment II on these results from experiment I), (b) for samples of three different compositions and for curing ages varying from 27 to 31 days. The regression procedure for experiment II compressive strength tests provided a statistically significant multifactorial function Keywords: age; cement; compressive; concrete; curing; experiment; parameters; results; specimen; strength; test; uncertainty
• Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments by Lekatou, Angeliki; Tsouli, Sofia; Nikolaidis, Christos; Kleftakis, Spyridon; Tragazikis, Ilias; Matikas, Theodoros (2019) - Although it cannot be claimed that the latter constitutes evidence of increased steel corrosion with FA increasing, it has to be mentioned that there are works, which have shown that the concentration of total chlorides in cements exposed to saline environments increases with increasing FA content at 12 m of immersion due to salt crystallization into the pores of concrete; as a result, a reinforcing steel mass loss increasing with FA content in the cement is observed [33,46]. The corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that ex- posed the reinforcement to direct acid rain attack, was investigated by reverse polarization. Keywords: 304l; acid; ash; ca(oh)2; concrete; corrosion; doi; electrolyte; fly; rain; rebars; salt; solution; steel; wt.%; wt.% fa
• Use of by-products for partial replacement of 3D printed concrete constituents; rheology, strength and shrinkage performance by Papachristoforou, Michail; Mitsopoulos, Vasilios; Stefanidou, Maria (2019) - CyBe Construction: Redefining construction by enabeling 3d concrete printing by providing hardware, software, material, education, certification and business development. Cementitious materials for construction-scale 3D printing: Laboratory testing of fresh printing mixture. Keywords: binder; cement; concrete; doi; lfs; materials; mixtures; printing; strength; workability
• Shear behaviour of reinforced concrete beams under impact loads by the lumped damage framework by Oliveira, Mateus; Teles, Daniel; Amorim, David (2020) - Microsoft Word - numero_53_art_02_2680 M. C. Oliveira et alii, Frattura ed Integrità Strutturale, 53 (2020) 13-25; DOI: 10.3221/IGF-ESIS.53.02 13 Shear behaviour of reinforced concrete beams under impact loads by the Lumped Damage framework Mateus Cardoso Oliveira, Daniel Victor da Cunha Teles, David Leonardo Nascimento de Figueiredo Amorim Laboratory of Mathematical Modelling in Civil Engineering, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil mateusoliver490@gmail.com, http://orcid.org/0000-0001-6227-8516 danielvcteles@gmail.com, http://orcid.org/0000-0002-9206-6351 david.amorim@ufs.br, http://orcid.org/0000-0002-9233-3114 ABSTRACT. The proposed formulation was applied in experiments of reinforced concrete beams under impact loads that presents shear collapse. Keywords: beams; concrete; damage; doi; impact; plastic; shear;  ;  
• Alternative Estimation of Effective Young’s Modulus for Lightweight Aggregate Concrete LWAC by Bouali, Meriem Fakhreddine; Abdelkader, Hima (2020) - Therefore, prediction possibilities using composite material models in determination of modulus of elasticity were sought and some suggestions were made accordingly to a statistical study. Error percentages of composite models and experimental results in 7 (%). Keywords: aggregate; cases; composite; concrete; doi; lightweight; lwac; maxwell; models; modulus; phase; results; young
• Effect of concrete cover thickness and main reinforcement ratio on flexural behavior of RC beams strengthened by NSM-GFRP bars by EL-Emam, Hesham; El-Sisi, Alaa ; Reda, Ramy ; Bneni, Mohamed; Seleem, Mohamed (2020) - Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. This paper presents the results of an experimental and numerical study on flexural behavior of strengthened RC beams by glass fiber reinforced polymer (GFRP) rods. Keywords: b1.15; bars; beams; concrete; cover; gfrp; nsm; reinforcement; steel
• Monitoring and analysis of reinforced concrete plate-column structure under room temperature and fire based on acoustic emission by Wang, Dongye; Dong, Yuli; Zhang, Dashan; Wang, Weihua; Lu, Xin (2020) - [28, 29], Yang [30] measured the AE features of two-way reinforced concrete plates in the overall structure, examined the changes in the number of AE events, energy rate and b-value of the plates under fire, and identified the correlation of each parameter with crack development, furnace temperature and vertical displacement of the plates. (2) The cumulative number of AE events can reflect the activity of the specimen. Keywords: concrete; cracks; energy; events; fire; furnace; ignition; min; plate; rate; stage; temperature; time
• Thermal Effect on Bond Strength of Rubberized Concrete Filled Steel Tubular Sections by Fawzy, Hesham; Mustafa, Suzan; AbdEl-Badie, Ahmed (2020) - Circular cross sections showed higher bond strength as well at high temperatures; 200° C and 400° C; as shown in Fig. Recovery in bond strength was observed when the specimens were cooled down. Keywords: bond; bond strength; cfst; circular; concrete; content; doi; rubber; slippage; specimens; square; steel; strength; temperature; tube
• On the lumped damage modelling of reinforced concrete beams and arches by Brito, Thalyson; Santos, Danilo; Santos, Fabio; Cunha, Rafael; Amorim, David (2020) - d M M d M NM U U U M N M N N        The analysis of reinforced concrete structures can be performed by means of experiments or numerical studies. Keywords: b b; b j; concrete; cos; damage; doi; sin; sin b;  ;  
• Optimum Sustainable Mix Proportions of High Strength Concrete by Using Taguchi Method by Warda, M.A. ; Khalil, H.S. ; Ahmad, Seleem; Mahdi, I.M. (2020) - Microsoft Word - numero_54_art_16_2792 M.A. Warda et al., Frattura ed Integrità Strutturale, 54 (2020) 211-225; DOI: 10.3221/IGF-ESIS.54.16 211 Optimum sustainable mix proportions of high strength concrete by using Taguchi method M.A. Warda, H.S. Khalil, Seleem S. E. Ahmad Materials Department, Faculty of Engineering, University of Zagazig, Egypt mamabowarda@gmail.com, http://orcid.org/0000-0001-2345-6789 hossamkhalil_m@yahoo.com, http://orcid.org/0000-0002-2345-6790 seleemahmad62@yahoo.com, http://orcid.org/0000-0002-2345-6791 I.M. Mahdi Structural Eng. High strength concrete; Taguchi method; Optimal mix design. Keywords: ash; compressive; concrete; days; fly; method; mix; ratio; splitting; strength; taguchi; tensile; tensile strength
• Modeling of CFRP strengthened RC beams using the SNSM technique, proposed as an alternative to NSM and EBR techniques by Boulebd, Adel; Noureddine, Ferhoune; Mohcene, Boukhezar; Mesbah, Habib Abdelhak (2020) - Eliminating concrete cover separation of NSM strengthened beams by CFRP end anchorage, Struct. The goal of this work is to study the bending behaviour of reinforced concrete beams strengthened with the side near surface mounted technique. Keywords: beams; cfrp; concrete; doi; failure; nsm; num; snsm; strengthening; study; technique
• Experimental Evaluation of Effects of Steel and Glass Fibers on Engineering Properties of Concrete: Engineering Properties of Concrete by Akbari, Jalal; Abed, Amirhossein (2020) - The experimental results show that adding 0.3% to 0.9% % steel fibers for concrete increases simultaneously the compressive, tension, and also flexural strengths in comparison with plain concrete. However, in steel fiber concrete with 0.6% and 0.9% fibers (CSF0.6, CSF0.9), this ratio has been reached the J. Akbari et alii, Frattura ed Integrità Strutturale, 54 (2020) 116-127; DOI: 10.3221/IGF-ESIS.54.08 125 lowest value equal to 52%. Keywords: cement; compressive; concrete; fibers; glass; ratios; specimens; steel; strength; tensile; water
• Numerical analysis of circular and square section concrete filled aluminum tubes under axial compression by Jinlong, Pan; Guanhua, Li; Cai, Jingming (2020) - Figure 8: Contact stress of circular (A, B, C) and square (A’, B’, C’,D’) columns Analysis of load-deformation histories Load-deformation curves of circular CFAT core concrete, square CFAT core concrete, aluminum tube of circular CFAT and aluminum tube of square CFAT are shown in Fig. The contact pressure distribution of circular CFAT tube is more uniform. Keywords: aluminum; cfat; compression; concrete; core; doi; strength; stress; tube
• Analysis of strengthened short deficient rubberized concrete-filled steel tubular columns by Elshazly, Fady; Mustafa, Suzan; Fawzy, Hesham (2020) - Composite columns can attain high loads with small cross section in comparison with concrete columns. Modeling of stress–strain relationships for steel and concrete in concrete filled circular steel tubular columns, J. Steel Construction Engineering, 3 (11), pp. Keywords: cfrp; columns; compressive; concrete; doi; gfrp; layers; load; specimens; steel; transversal; tube; ultimate
• Tension Strength Prediction of Transverse Branch Plate-to-Rectangular Joint with Concrete Filling by Xiong, Zhihua; Liu, Yongjian; Liu, Bin; Jiang, Lei (2020) - The chord axial stress reduction factor was discussed and a modified equation originated from hollow joint was recommended for CBPRH joint. Hence, the concrete strength variation is omitted in the equation of CBPRH joint. Keywords: branch; cbprh; cbprh joint; chord; concrete; doi; failure; fig; joint; pbr; plate; specimens; strength; stress; strutturale; transverse; xiong
• Experimental characterization of a new sustainable sand concrete in an aggressive environment by Mani, Mohammed ; Bouali, Meriem Fakhreddine; Kriker, Abdelouahed ; Hima, Abdelkader (2020) - Durability; Economic; Sand concrete; Sand dune; Naturel sand. The concentrations are tripled by the authors to speed up the results of its effect on sand concrete. Keywords: concrete; dune; gsd; natural; nsr; oued; ratm; samples; sand; strength; water
• Temporal analysis of the performance of an elevated concrete tank considering the corrosion of the steel reinforcement by Hammoum, Hocine; Miloudi, Nassima ; Bouzelha, Karima; Aoues, Younes; Amiri, Ouali (2021) - Concrete bridge protection, repair, and rehabilitation relative to reinforcement corrosion: a methods application manual. Figure 8: Effect of diffusion coefficient and chloride ion concentration on corrosion initiation time. Keywords: aggressiveness; chloride; concentration; concrete; corrosion; cover; doi; environment; high; initiation; ions; lifetime; reinforcements; section; seismic; tank; time
• Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete by Nehar, Kheira Camellia; Benamara, Dalila (2021) - To understand the degradation of mechanical properties of recycled aggregate concrete (RAC) after acid rain exposure, the effect of recycled coarse aggregate (RCA) replacement ratios, the acidity (pH value) of the simulated acid rain solution and mineral admixtures on compressive strength and elastic modulus of RAC are investigated in the study of Lu et al. Modeling compressive strength of recycled aggregate concrete by Artificial Neural Network, Model Tree and Non-linear Regression. Keywords: aggregates; compressive; concrete; doi; element; finite; materials; method; strength
• Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes. by Madqour, Mahmoud; fawzy, khaled; Hassan, Hilal (2021) - Citation: Fawzi., F., Hassan, H., Madqour., M. Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes, Frattura ed Integrità Strutturale, 56 (2021) 123-136. [2] In this study, 3D-FEM is analyzed in reinforced concrete beams on the basis of a load-deflection reaction analysis. Keywords: beams; cfrp; concrete; deflection; failure; load; strength; strutturale
• Parametric study of I-shaped shear connectors with different orientations in push-out test by Farid, Boursas; Boutagouga, Djamel (2021) - A great deal of research has been conducted to improve the understanding of the behavior of new types of shear connectors. In practice, several forms of shear connectors are widely used. Keywords: capacity; concrete; connector; doi; element; finite; load; push; shear; steel; strength; test
• Effects of coarse sand dosage on the physic-mechanical behavior of sand concrete by Melais, Saloua; Bouali, Meriem Fakhreddine; Melaikia, Ahmed; Amirat, Amine (2021) - The objective of this research is to study the influence of the dosage of the size of the largest aggregate on the workability of sand concretes as well as on the compressive strength at 7 days, 14 days and 28 days. Sand concrete; Extended granular; Workability; Mechanical behavior. Keywords: coarse; concrete; days; dosage; quarry; sand; sand concrete; sc4; strength
• Wavelet-based multiresolution analysis coupled with deep learning to efficiently monitor cracks in concrete by Arbaoui, Ahcene; Ouahabi, Abdeldjalil; Jacques, Sebastien; Hamiane, Madina (2021) - Autonomous concrete crack detection using deep fully convolutional neural network, Automation in Construction, 99, pp. Such cracks will be detected by ultrasonic NDT and analyzed by the wavelet transform providing a spatially scaled image allowing to localize the crack in space and at each resolution. Keywords: analysis; architecture; concrete; cracks; doi; figure; frattura; igf; image; integrità; layers; learning; multiresolution; signal; strutturale; wavelet
• Analysis of Above-Ground Steel Storage Tanks Resting Over Piles or Stone Columns by Salem, Tarek; Maaly, Hassan; Abdelbaset, Ahmed (2021) - The main purpose of this research is to explore to what extent stone columns can be used as an effective alternative to concrete piles under steel storage tanks. Steel storage tanks resting on soft clay soil is a challenge for engineers because of their relatively higher loads, sensitivity for total and differential settlements, and containing high risk fluids. Keywords: columns; concrete; piles; settlement; steel; stone; tanks
• Optimization of High-Performance-Concrete properties containing fine recycled aggregates using mixture design modeling by Boudina, Tounsia; Benamara, Dalila; Zaitri, Rebih (2021) - Effect of RCA and RBA on compressive and flexural strength Mechanical characterization was carried out using compressive and flexural strength measurements to assess the effect of RCA and RBA recycled aggregates. Fresh-state performance of recycled aggregate concrete: A review. Keywords: aggregates; concrete; days; design; doi; rba; rca; sand; strength
• Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable by Cunha, Rafael; Oliveira, Kevin; Brito, Antônio; Vieira, Camila; Amorim, David (2021) - Microsoft Word - numero_57_art_08_3059 R. N. da Cunha et alii, Frattura ed Integrità Strutturale, 57 (2021) 82-92; DOI: 10.3221/IGF-ESIS.57.08 82 Evaluation of the behaviour of reinforced concrete beams repaired with glass fibre reinforced polymer (GFRP) using a damage variable Rafael Nunes da Cunha, Kevin Mendonça Oliveira, Antônio Gabriel Lisboa Rego Brito, Camila de Sousa Vieira, David Leonardo Nascimento de Figueiredo Amorim Laboratory of Building Materials and Structures, Post-graduation Programme in Civil Engineering, Department of Civil Engineering, Federal University of Sergipe, São Cristóvão, Brazil rafael.cunha@ctec.ufal.br, http://orcid.org/0000-0003-2503-6758 kevin.zero@hotmail.com; http://orcid.org/0000-0002-1685-3636 gabriel.lisboa.eng@gmail.com; http://orcid.org/0000-0002-2075-3208 milavieira@gmail.com, http://orcid.org/0000-0002-5371-191X davidnf@academico.ufs.br, http://orcid.org/0000-0002-9233-3114 ABSTRACT. [11] evaluated the bending performance of reinforced concrete beams strengthened with hybrid carbon and basalt fibre reinforced polymer (CFRP/BFRP) composite sheets. Keywords: beams; concrete; damage; doi; fibre; glass; integrità; nbr; repair; strutturale
• Enhancement of Blast Resistance of R.C Beams Using Micro/Nano Silica in Presence of Steel Fibers by Nawar, Mahmoud; El-Awady, Kareem ; Shehab, Hamdy ; Eisa, Ahmed (2021) - PARAMETRIC STUDY he finite element test program was further extended to investigate the impact of the tensile reinforcement ratio on the behavior of tested R.C beams under blast loading with and without SMCs (10%MS+1%NS) in the presence of SFs with different volume fractions. 29 show the dynamic reaction-deflection relationship of tested R.C beams with different reinforcement ratios. Keywords: beams; blast; concrete; deflection; doi; fig; r.c; ratio; reinforcement; results; steel; time; toughness
• Lumped damage mechanics as a diagnosis tool of reinforced concrete structures in service: case studies of a former bridge arch and a balcony slab by Cunha, Rafael; Vieira, Camila; Amorim, David (2021) - For reinforced concrete elements, a damage value around 0.3 or 0.4 represents the beginning of the reinforcement yield, and a damage of approximately 0.6 means the bearing capacity of the element [29]. The cracking resistance function for reinforced concrete elements [29] is given by:    Keywords: b b; concrete; cos; damage; doi; sin; sin b;  
• Load bearing capacity of thin-walled rectangular and I-shaped steel sections of short both empty and concrete-filled columns by Bouaricha, Amor; Handel, Naoual; Boutouta, Aziza; Djouimaa, Sarah (2021) - The recorded experimental results are compared with those given by the prediction of EC3 regulation [14] for empty steel columns and EC 4 [15] for mixed columns. Figure 3: Experimental ultimate load (Nue) of empty steel columns. Keywords: columns; concrete; cross; load; section; series; specimens; steel; strength
• Enhancement of circular RC columns using steel mesh as internal or external confinement under the influence of axial compression loading by Emara, Mohamed; Rizk, Mostafa; Mohamed, Heba; Zaghlal, Mahmoud (2021) - Behavior of FRP strengthened concrete columns under eccentric compression loading, Composite Structures, 77(1), pp. Behaviour of FRP strengthened concrete columns under eccentric compression loading, Composite Structures, 77(1), pp. Keywords: column; concrete; confinement; control; doi; fig; load; mesh; specimen; steel; stirrups
• Analysis of the bond-slip performance of steel bars and steel fiber recycled concrete based on the constitutive relationship model by Xia, Zhengbing; Duan, Xiaofang (2021) - The research results showed that the greater the replacement rate of recycled aggregates was, the lower the bond strength between steel bars and steel fiber recycled concrete was; in the range of 0~1.2%, the higher the mixing amount of steel fibers was, the greater the bond strength of the specimen was; in the range of 0~1.6%, the higher the mixing amount of steel fibers was, the greater the slip value of the specimen under the peak load was; the addition of steel fibers improved the failure behavior of the recycled concrete pull-out specimens; the test specimens mainly had pull-out failure when the mixing amount of steel fibers was 1.2% and 1.6%. The objective of this study is to confirm that changing the replacement rate of recycled aggregates and the mix proportion of steel fibers can affect the bonding and slipping performance of steel bars and steel fiber recycled concrete through experiments. Keywords: bond; concrete; failure; pull; slip; steel; steel bars; steel fibers; strength; test
• Interaction diagram for RC column strengthened by steel angles and strips by Shallan, Osman; Sakr, Thrwat; Khater, Mahmoud; Ahmed Ismail (2022) - In this study, strengthened columns are modeled and studied using the commercial finite element software (ANSYS -Version 19.2). Deformation in strengthened column specimen (c1 t3) at failure comparison between numerical and experimental results for verification. Keywords: angles; column; concrete; load; steel; steel angles; strips;  
• The effect of using polypropylene fibers on the durability and fire resistance of concrete by Suiffi, Hassan; El Maliki, Anas ; Majid, Fatima; Cherkaoui, Omar (2021) - Influence of stress on chloride penetration into fiber reinforced concrete, JCI, 25, pp. Permeability and porosity characteristics of steel fiber reinforced concrete. Keywords: cement; composite; concrete; doi; durability; fibers; permeability; polypropylene; polypropylene fibers; porosity; test
• Experimental assessment of different strengthening techniques for opening in reinforced concrete beams by Agag, Fatma; Ahmad, Seleem S. E. ; Sallam, Hossam El-Din M. (2021) - External reinforcement of beam openings with steel plates or carbon fiber reinforced polymer (CFRP) sheets is more effective than internal reinforcement with steel [1]. Strengthening of beams openings in flexural region for different shapes, Civ. Eng. Keywords: bars; beam; cfrp; concrete; cracks; doi; failure; fig; load; opening; results; shear; steel; strengthening
• Experimental contribution to the study of the physic-mechanical behavior and durability of high-performance concretes based on ternary binder (cement, silica fume and granulated blast furnace slag) by Rahim, Ouahab; Achoura, Djamel; Benzerara, Mohammed; Bascoulès-Perlot, Céline (2021) - séchage Behaviour of slag HPC submitted to immersion-drying cycles, J. Mater. The properties of ground granulated blast furnace slag, specifically its low water absorption rate by the smooth surfaces of the granulated slag grains, work together to improve the workability of HPC over ordinary Portland cement concrete Keywords: blast; blast furnace; cement; concrete; days; doi; durability; furnace slag; ground; hpc; performance; porosity; slag; slag hpc; substitution; water
• The influences of the number of concrete dowels to shear resistance based on push out tests by Vu, Anh-Tuan; Han, Ngoc-Duc; Nguyen, Kien; Nguyen, Dinh-Hoa (2021) - The influences of the number of concrete dowels to shear resistance based on push out tests Anh-Tuan Vu, Ngoc-Duc Han, Dinh-Hoa Nguyen, Trung-Kien Nguyen Department of Steel and Timber Structures, Faculty of Building and Industrial Construction, Hanoi University of Civil Engineering, 55 Giai Phong road, Hanoi, Vietnam tuanva@nuce.edu.vn, https://orcid.org/0000-0002-0524-7024 duchn@nuce.edu.vn, hoand@nuce.edu.vn kiennt3@nuce.edu.vn, https://orcid.org/0000-0003-0966-1617 ABSTRACT. The results indicate that the mechanical behavior of concrete dowel could be divided into crushing, compression, and tension zones and exhibits brittle behavior. Keywords: beam; behavior; concrete; dowel; number; shear; steel; test
• Experimental analysis of short concrete column under hygrothermo-mechanical accelerated aging by Hassani, Nacera; Dehmous, Hocine (2022) - Aging concrete structures: a review of mechanics and concepts, Journal of Land Management, Food and Environment, 69 (3), pp. QUANTIFICATION OF AGEING DEGRADATION OF CONCRETE SHORT COLUMN SPECIMENS s already indicated in the introduction, to quantify degradation of concrete specimens, we combine UPV testing and compression testing. Keywords: aging; concrete; cycles; damage; doi; fig; load; measurements; process; specimens; velocity; wave
• Experimental investigation on the mechanical behavior of concrete reinforced with Alfa plant fibers by Messas, Tidjani; Achoura, Djamel; Abdelaziz, Boutrid; Mamen, Belgacem (2022) - For fiber reinforced concretes, three stages are observed: a linear trend characterized the first stage, whereas in the descending branch (second stage); the fibers limit the cracks and their opening by sewing. Fiber-reinforced concrete; Alfa fiber; fiber length; volume Citation: Messas, T., Achoura, D., Boutrid, A., Mamen, B., Experimental investigation on the mechanical behavior of concrete reinforced with Alfa fibers, Frattura ed Integrità Strutturale, 60 (2022) 102-113. Keywords: alfa; concrete; content; doi; fiber; fiber length; fig; length; load; strength; tensile
• Optimization of a reinforced concrete structure subjected to dynamic wind action by Brito, Jherbyson; Miguel, Letícia (2021) - Optimization; Concrete structure; Metaheuristic algorithms Citation: J. W. S. Brito and L. F. F. Miguel., Optimization of a reinforced concrete structure subjected to dynamic wind action, Frattura ed Integrità Strutturale, 59 (2022) 326-343. Given the simulations carried out in this work and the results obtained, it is clear that the procedure proposed in this paper to optimize concrete structures through metaheuristic algorithms is satisfactory, bringing good results in relation to the volume of concrete (reduction of up to 24% in relation to original structure), and also in relation to the maximum displacement required by the standard, respecting the limit value. Keywords: concrete; doi; k k; optimization; otim; scenario; structure; tmd; volume; wind;  ;  ;  
• Analysis of workability, mechanical strength and durability by the FT-IR method of concrete based on silica-limestone sand preserved in aggressive environments by Abdelkader, Hima; Djedid, Tarek; Mani, Mohammed; Guettala, Abdelhamid (2021) - Two compositions of concrete were made in this context; the first is based on 50% substitution of river sand by crushed limestone sand [9] named C1, and the other is a control concrete C0 of 0% limestone sand to access the comparison. Long term study of mechanical properties, durability and environmental impact of limestone cement concrete. Keywords: cement; cm-1; compressive; concrete; days; djedid; doi; environment; limestone; sand; strength; water
• Assessment of fluidity retention, mechanical strength and cost production of blended cement self-compacting concrete using the concept of a performance index by Boukhelkhal, Aboubakeur; Kenai, Said (2022) - SCC mixtures were tested at a fresh state to evaluate the filling, passing ability and the risk to segregation. 22 44 66 88 Sand 0/5 (kg/m3) 882.9 Coarse aggregate (kg/m3) 8/15 553 3/8 277 Water (kg/m3) 188 Superplasticizer (kg/m3) 4.23 Water/binder 0.4 Superplasticizer/binder 0.9 Table 4: Mix proportions of SCC mixtures. Keywords: cement; compressive; concrete; cost; doi; flow; fluidity; mixtures; performance; properties; scc; segregation; self; strength
• Effect of varying silica-limestone sand fines on the physical-mechanical performance of concrete by Djedid, Tarek; Mani, Mohammed; Ouakouak, Abdelkader; Guettala, Abdelhamid (2021) - Many researchers around the world have found that concrete based on 50% substitution of river sand by limestone sand gives better physico-mechanical characteristics. Aggregates The sand used for the production of concrete is composed of a mixture of 50% natural crushed sand (limestone sand) with a grain size of 0/3 mm (Fig. 1b) from the Ben Brahim quarry in the area (Hassi Messaoud, Algeria) and 50% natural rolled sand from the area of (Tébessa, Algeria) with a grain size of 0/5 mm (Fig. 1a) Keywords: cement; concrete; density; djedid; doi; fig; fines; limestone; limestone sand; sand; silica; strength; water
• Self-healing mortar using different types, content, and concentrations of bacteria to repair cracks. by Ahmed Refat El-Mahdy, Mohamed; ELShami, Ahmed; Yousry Elshikh, Mohamed ; Saleh Elsayed Ahmad , Seleem (2021) - This study investigated the effect of bacteria type, bacteria content, bacteria concentration, and nutrient type on the properties of the self-healing mortar. In the present work, the effect of bacteria type, bacteria content, bacteria concentration, and nutrient type on the properties of the self-healing mortar was experimentally investigated. Keywords: bacteria; bacteria bm; bacteria concentration; calcium; cement; compressive; concentration; concrete; days; doi; effect; emcc; mix; mortar; results; specimens; strength; type
• Experimental behavior based on effective slab width acting as a flange with supporting steel beams in composite floors with openings by Khamis, Magdy Khalaf; Ashraf El-Shihy; El-Sayed El-Kasaby; Ahmad Youssef (2022) - These cracks went to be wider more and more and inclinable propagated towards surface top while other cracks initiated within two concentrated loads in between distance slightly before failure where cracks appeared along overall concrete slab top surface especially within spans middle thirds of both exterior and interior supporting steel beams accompanied with concrete crushing. Microsoft Word - numero_61_art_21_3342.docx M. Khalaf et alii, Frattura ed Integrità Strutturale, 61 (2022) 308-326; DOI: 10.3221/IGF-ESIS.61.21 308 Experimental behavior based on effective slab width acting as a flange with supporting steel beams in composite floors with openings Magdy Khalaf, Ashraf El-Shihy Structural Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt. Keywords: beams; concrete; doi; fig; figure; khalaf; loading; models; opening; slab; steel; width
• Improvement of mechanical properties of railway track concrete sleepers using ultra high performance concrete (UHPC) by Ahmed , Sayed ; Atef, Hossam; Husain, Mohamed (2022) - In recent times, the shape of the beams evolved from wooden sleepers and then to steel sleepers until they reached concrete sleepers. This development took place in concrete sleepers until we reached mono-block concrete sleepers. Keywords: center; concrete; doi; failure; fig; load; rail; seat; section; sleepers; test; uhpc
• Experimental and numerical evaluation of compression confinement techniques for HSC beams reinforced with different ratios of high strength steel reinforcement by Ahmad, Seleem; Graf, Abdo-Alfatah ; El-Kholy, Abd El-Monem ; Bneni, Mohamed; Elkilani, Ahmed (2022) - [10] to study the behavior of high strength reinforced concrete beams. [11] Chowdhury, S. and Loo, Y. Cracking and damping in reinforced high strength concrete beams. Keywords: beams; concrete; confinement; control; fiber; load; reinforcement; results; steel; steel fiber; strength; technique
• Effects of rubber aggregates on the physical-mechanical, thermal and durability properties of self-compacting sand concrete by Saleh, Faisal A H; Kaid, Nouria ; Ayed , Kada ; Kerdal, Djamel-Eddine ; Chioukh, Nadjib; Leklou, Nordine (2022) - Figure 13: Evolution of the apparent porosity of concrete mixtures at 28 and 365 days of curing period under water VC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC SCSC 0 2 4 6 8 10 12 14 16 18 A pp ar en t p or os it y in ( % ) During the first hour of SCSC GR concrete, the values of the capillarity (Fig. 14-c, Fig. 14-f)) increased by 1.5 kg/m2 for the 10, 15 and 20% substitution rates of in GR compared to those of the reference concrete SCSC. Keywords: absorption; aggregates; concrete; days; grains; properties; rubber; sand; scsc; scsc pr; scsc scsc; scsc sr; strength; substitution; tests; values
• Effect of reinforcement type on structural behavior of RC beams containing recycled aggregate by Elsadany, Rasha; Al-Tersawy, Sherif H.; Sallam, Hossam El-Din M. (2022) - Preparation of Beams In this stage, GFRP RC beams and steel RC beams with and without RCA were prepared. It is clear from table 7 that the ratios of ultimate load of RC beams with RCA to that of RC beams with NCA (PULT-RCA/PULT-NCA) are lower in the case of GFRP RC beams than steel RC beams. Keywords: aggregate; bars; beams; concrete; doi; gfrp; load; rc beams; rca; reinforcement; steel; strength; tensile
• Study of Structural Stability of a Concrete Gravity Dam Using a Reliability Approach by Kerkar, Mohamed Essaddik; Mihoubi, Mustapha Kamel (2022) - It provides information on what can happen to other dams in service, this analysis presents a field in full development, the result obtained presents a mathematical inflection of the uncertainty related to the parameters introduced in the dam stability calculation which means that the uncertainty is expressed in terms of failure probabilities. Basic concept of LHS with two variables and five realizations [28] APPLICATION OF THE MODELS he application of the three reliability methods on the Beni Harroun dam gave failure probabilities during certain scenarios, each scenario having its own specific load combinations, e.g. Pf estimated in scenario 47 (C47) is the probability of failure at the landslide in relation to the dam-foundation interface when the dam is subjected to seismic loading and when the functional probability for the drainage system to operate at 90% is equal to 1. Keywords: concrete; dam; dams; doi; failure; integrità; methods; probability; reliability; risk; safety; scenarios; strutturale
• Experimental and numerical assessment of the location-based impact of grouting defects on the tensile performance of the fully grouted sleeve connection by Kahama, Espoir; Fuzhe, Xie; Lu, Chunhua ; Offei, Isaac (2022) - Tensile behavior of half grouted sleeve connections: Experimental study and analytical modeling. While there are various ways of connecting PC members, the use of grouted sleeve connection is more common in the construction industry worldwide Keywords: bar; bond; capacity; concrete; connection; defect; doi; grouting; idem; iii; impact; location; materials; performance; sleeve; sleeve connection; specimen; tensile
• Improvement of hydration products for self-compacting concrete by using magnetized water by ELShami, A.A.; Essam, Noura; Yousry, El-Shikh M. (2022) - Magnetized water (MW) is one of the most effective and economical ways to improve the properties of self-compacting concrete (SCC). M. N., Improvement of hydration products for self-compacting concrete by using magnetized water, Frattura ed Integrità Strutturale, 61 (2021) 352-371. Keywords: cement; compressive; concrete; cycles; days; doi; fume; hydration; materials; mixes; properties; scc; silica; silica fume; strength; tap; tap water; test; water
• Valorization and recycling of packaging belts and post-consumer PET bottles in the manufacture of sand concrete by Biskri, Yasmina; Benzerara, Mohammed; Babouri, Laidi; Dehas , Ouided; Belouettar, Redjem (2022) - From the experimental results, it can be concluded that the reinforcement of the cement matrix with PET fibers with a rate of 1% improves the mechanical properties of sand concrete as well as a remarkable decrease in its water absorption capacity. KEYWORDS. Sand concrete; PET fiber; Mechanical behavior; Water absorption; Environment. Keywords: concrete; density; doi; effect; fiber; igf; integrità; pet; properties; sand; strength; waste
• Effect of parent concrete strength on recycled concrete performance by Kebaili, Bachir; Benzerara, Mohammed; Menadi, Souad; Kouider, Nadia; Belouettar, Redjem (2022) - When crushed, RCA from low strength concrete has less attached mortar than RCA from high strength concrete as seen by [10]. Furthermore, increasing the cement content in recycled aggregate concrete (RAC) by around 6.2 percent without affecting the w/c ratio results in compressive strength and consistency comparable to that of ordinary concrete [14]. Keywords: aggregate; cement; compressive; concrete; mix; mortar; parent; rac; rca; strength; water
• Microstructure characterization of sustainable light weight concrete using trapped air additions. by Maaty, Said; Elshami, Ahmed; Kamel, Fryal (2022) - %, 0.75 wt. %, and 1 wt. %). In filler materials, CBP was used in different weight ratios (0 wt. %, 10 wt. %, 20 wt. %, and 30 wt. %) and air-entraining agent (AEA) was utilized in various weight ratios (0.25 wt. Keywords: aggregate; air; building; cement; concrete; days; density; doi; lightweight; materials; mixes; mpa; pressure; strength; tad; weight
• Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures by Elmesiri, Mohamed; Fawzy Ahmed, Mohamed; Bneni, Mohamed; ElShami, Ahmed; Ahmad, Seleem (2022) - Effect of elevated temperature on mechanical properties of high strength concrete, 23rd Australasian Conference on the Mechanics of Structures and Materials, pp. 1077-1082. Transient strain of high strength concrete at elevated temperatures and the impact of polypropylene fibers, Materials and Structures, 45, pp. Keywords: compressive; concrete; doi; effect; fibers; mixes; strength; temperatures; tensile; ° c
• Structural behavior of damaged reinforced concrete beams under static cyclic loading by Elbaz, Abdelrahman; Marzouk, H.; Heiza, Kh.; Elnawawy, Omar (2022) - Flexural behavior of concrete beams reinforced by partially unbonded steel-FRP composite bars, Engineering Structures, 272, 115050. Use of fiber Bragg grating array and rand decrement for damage detection in steel beam, Engineering Structures, 106, pp. Keywords: beams; concrete; deflection; ductility; failure; fig; load; loading; reinforcement; steel; strutturale
• Effect of date palm and polypropylene fibers on the characteristics of self-compacting concretes: comparative study by Derdour, Dounia; Behim, Mourad; Benzerara, Mohammed (2023) - This article presents the results of a comparative experimental study on the influence of date palm fibers to replace polypropylene fibers used as reinforcement in self-compacting concrete (SCC). Date palm fibers have mechanical characteristics (tensile strength and elasticity modulus) largely sufficient to replace polypropylene fibers. Keywords: absorption; cement; concrete; date; date palm; doi; fibers; fig; igf; integrità; palm; palm fibers; polypropylene; scc; self; study; water
• Experimental and numerical investigations of the flexural behaviour ‎of Green - Ultra High Performance Fiber Reinforced Concrete ‎beams under repeated loads by Ayman Abdo; Ramadan Asker; sobhy, Dina Atif; Sayed Ahmed (2023) - Yoon and Yoo [15] studied the flexural behaviour of UHPFRC beams with different steel fiber lengths for low reinforcement ratios. Experimental and numerical study of flexural properties in UHPFRC beams with and without an initial notch, Constr. Keywords: ash; beams; cement; concrete; doi; fiber; fly; group; load; performance; steel; steel fiber; uhpfrc
• Degradation of the first frequency of an RC frame with damage levels by Nguyen, Quy; Livaoğlu, Ramazan (2023) - Damage in RC structures causes the degradation of stiffness and frequency. INTRODUCTION tructural health monitoring (SHM) has been applied to control regularly the health of RC structures which have deteriorated having been subjected to a sudden loading (Khatir et al. Keywords: concrete; damage; degradation; doi; fig; frequency; nguyen; numerical; stiffness
• The impact of utilizing UHPFRC in beam-column joints with different patterns of transverse reinforcement by Abdo, Ayman; Mohamed , Heba A.; Ryad, Talaat; Ahmed, Sayed (2023) - Joint shear strength is affected by depth aspect ratios [13]; proper anchoring to longitudinal beam bars in a joint prevents beam bars from pulling out, increases bond strength, and influences joint shear strength The results showed that thrived-carrying capacity and joint shear strength were improved in hybrid samples, and the joint shear failure changed to beam flexural failure. Keywords: beam; column; concrete; control; doi; energy; failure; fiber; joint; load; sample; shear; steel; strength; uhpc; uhpfc2; uhpfrc
• The influence of notch connection location on the short-term behaviour of timber-concrete composite beams, modelling of TCC beams and research for optimal locations, a numerical study by Zinelaabidine, Hedmessaoud; Zeineddine, Boudaoud; Noureddine, Ferhoune (2023) - The study of composite beams, with real dimensions based on laboratory tests, is often expensive and takes time, especially in large studies including multiple numbers of parameters, while resorting to finite element analysis gives an alternative tool to study these systems. Finite element modeling of flexural behavior of reinforced concrete beams externally strengthened with CFRP sheets, Frat. Keywords: beams; bending; composite; concrete; connection; doi; location; notch; stiffness; strength; tcc; tcc beams; timber
• An assessment of HDPE fillers and Fiber Wrapping on the strength of Reinforced Concrete by Gudadappanavar, Basavaraj; Kulkarni, Dilip; Gouda, Shivakumar (2023) - The influence of amount and aspect ratio of fibers on shear behaviour of steel fiber reinforced concrete. The retrofitting of shear damage of reinforced concrete beam shear strength increased between 50% to 111% due to the carbon fiber strip wrapping and the addition of micro-synthetic fibers.[12]. Keywords: concrete; doi; fiber; hdpe; impact; resistance; samples; shear; strength; tensile; wrapping
• Glass Fiber for Improved Behavior of Light Expanded Clay Aggregate Concrete Beams: An Experimental Study by Aboul Nour , Louay; Gamal, Mariam; Ghoniem, Amr (2023) - (b) 75% LECA +2% glass fiber. (b) 75% LECA +2% glass fiber. Keywords: aggregate; compressive; concrete; content; doi; fiber; fiber content; glass; glass fiber; l75; leca; leca content; lightweight; strength; tensile
• Experimental and numerical investigations of masonry ‎ beams performance under bending loads by Hamed, Samarsamy; Husain, Mohamed; Zaghlal, Mahmoud; El-Sisi, Alaa (2023) - Although research on the behavior of masonry beams reinforced with various types of FRP bars has been limited, researchers have found that the flexural capacity and stiffness of reinforced masonry beams improved significantly as the internal reinforcement ratio increased [12]. A study was conducted to examine the flexural behavior of reinforced masonry beams that were internally reinforced with carbon fiber-reinforced polymeric (CFRP) bars and had polyvinyl alcohol (PVA) fibers and polyester fiber bed joints [16]. Keywords: beams; cfrp; concrete; doi; failure; load; masonry; reinforcement; rmbb; shear; steel; strength
• Experimental studies to evaluate tensile and bond strength of Stainless-Steel Wire Mesh (SSWM) by Patel, Paresh; Joshi, Digesh; Makawana, Rinkesh (2023) - The factors affecting behaviour of SSWM bond specimens are concrete surface preparation, application of epoxy on surface of concrete, thickness of epoxy layer, opening size of SSWM, effectiveness of bond between SSWM & concrete, and workmanship. Photograph of actual test set-up to conduct tensile test of SSWM coupon specimens is presented in Fig. Keywords: bond; concrete; doi; load; specimens; sswm; steel; strength; strengthening; tensile; test; wire
• Experimental and numerical investigation the effect of concrete strength and area of steel reinforcement on mechanical performance of functionally graded reinforced concrete beams by Ahmad, Seleem; Ali, Esraa; Moawad, Mohamed; Elemam, Hesham (2023) - Eighteen layered sections of reinforced concrete beams were tested with different compressive strengths arrangement and area of main steel. NUMERICAL RESULTS AND COMPARISONS 3D finite element analysis was executed using ABAQUS to simulate the behavior of reinforced concrete beams tested in the experimental program[20]. Keywords: beams; compression; compression zone; concrete; deflection; load; mpa; reinforcement; steel; strength; zone
• The behavior of reinforced lightweight concrete beams with initial cracks by Hasa, Mustafa Q.; Abdulridha, Abdulkhalik (2023) - RF-50 Repaired beam with full U-wrapping CFRP sheets and subjected to 50% of damage. RF-60 Repaired beam with full U-wrapping CFRP sheets and subjected to 60% of damage. Keywords: beams; cfrp; concrete; damage; doi; height; integrità; lwc; sheets; specimen; strutturale; wrapping
• Experimental work of effect of openings on the post-tensioned flat slab by Zamrawi, Amal; Shoeib, Ata El-Kareim; Abdo, Angelos; Ahmed, Samir M. (2023) - Yielding Point Ultimate Point 1,54 2,10 1,62 2,18 0,00 0,50 1,00 1,50 2,00 2,50 D uc til ity S1 s3 S4 S6 1,47 1,58 2,05 2,13 0,00 0,50 1,00 1,50 2,00 2,50 D uc til ity S2 S5 S7 S8 A.Zamrawi et alii, Frattura ed Integrità Strutturale, 67 (2024) 292-310; DOI: 10.3221/IGF-ESIS.67.21 303 This bar chart indicates the effect of number of strands and openings case on post-tensioned flat slab. Stiffness induced from 4 strands post-tensioned flat slab. Keywords: column; concrete; deflection; doi; figure; load; openings; post; punching; slab; specimens; strands
• Effect of Granular Waste Compact Disc on Bond Strength between Steel Bars and Surrounding Concrete by Mawlood, Barzan; Khaleel, Sanaa; Mohammad, Ahmed (2023) - Given that discs are an insoluble substance with a low ability to absorb water and low hardness, the low bond force on the fine aggregate with T B. O. Mawlood et alii, Frattura ed Integrità Strutturale, 67 (2024) 80-93; DOI: 10.3221/IGF-ESIS.67.06 86 surrounding concrete may have caused the decrease in concrete strength resulting from adding more disc to the mix. Microsoft Word - numero_67_art_06_4498.docx B. O. Mawlood et alii, Frattura ed Integrità Strutturale, 67 (2024) 80-93; DOI: 10.3221/IGF-ESIS.67.06 80 Effect of granular waste compact disc on bond strength between steel bars and surrounding concrete Barzan Omar Mawlood, Sanaa Ismael Khaleel, Ahmed Heidayet Mohammad University of Salahaddin-Erbil, Iraq barzan.mawlood@su.edu.krd, https://orcid.org/0000-0002-3080-868X sanaa.khaleal@su.edu.krd, https://orcid.org/0009-0005-3593-3681 ahmed.mohammad@su.edu.krd, https://orcid.org/0000-0003-1079-2526 KEYWORDS. Keywords: bar; bond; concrete; content; d12; disc; doi; pieces; specimens; steel; strength; test; waste
• Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups by Mahmoud, Ahmed; Nasser, Moaz; Mostafa, Tarek; Khater, Ahmed (2023) - EXPERIMENTAL PROGRAM he current investigation employed three factors to modify the tested specimens: (1) the diameter of external GFRP stirrups (Φ8, Φ10, and Φ12 mm), (2) the inclination of external GFRP stirrups (45º, 60º, and 90º), and (3) the spacing of external GFRP stirrups (75, 100, 125, and 150 mm). STRENGTHENING TECHNIQUE he procedure for retrofitting the tested specimens using external GFRP stirrups can be summarized as follows: Keywords: concrete; doi; failure; gfrp; gfrp stirrups; integrità; load; shear; specimens; stirrups; strutturale; torsion
• Effect of Bacillus Subtilis Bacteria on The Mechanical Properties of Corroded Self-Healing Concrete by Nindhita, Kharisma Wira; Zaki, Ahmad; Zeyad, Abdullah M. (2024) - The use of Bacillus sp. in concrete mixtures has been known as a crack-healing agent in concrete and prevents concrete reinforcement corrosion. Effect of sustained service loads on the self-healing and corrosion of bacterial concretes, Construction and Building Materials, 322, pp. Keywords: bacteria; beam; concrete; corrosion; cracks; doi; encapsulation; figure; healing; process; reinforcement; results; self; strength; test; variation
• Enhancing the flexural performance of lightweight concrete slabs with CFRP Sheets: an experimental analysis by Khadim, Mustafa; Abdulridha, Abdulkhalik (2024) - Reinforced concrete slabs repaired by composite materials (CFRP) sheets significantly increase failure load compared to unreinforced slabs and prevent crack propagation compared to unreinforced slabs. Repairing the specimens with CFRP sheets increased the failure load of reinforced concrete slabs and effectively prevented crack propagation. Keywords: cfrp; concrete; damage; doi; lightweight; load; sheets; slabs; strength; strutturale
• Rubberized reinforced concrete columns under axial and cyclic loading by Ahmed, Mohamed; mohamed, Heba- Allah; Hassan, Hilal; Zaghlal, Mahmoud (2024) - Current design codes for new construction describe the seismic details for reinforced concrete columns, such as ACI After adding 10% and 15% crumb rubber, respectively, to rubberized reinforced concrete columns, the ultimate load for circular RC column specimens measuring 1500 mm in height dropped from 1611 kN to 1370 kN and 1285 kN by 14.95% and 20.24%. Keywords: columns; concrete; damping; displacement; doi; ductility; height; integrità; lateral; load; rubber; strutturale
• Low-carbon cementitious composite incorporated with biochar and recycled fines suitable for 3D printing applications: hydration, shrinkage and early-age performance by Federowicz, Karol; Cendrowski, Krzysztof; Sikora, Paweł (2024) - In summary, recycled concrete fines and biochar are eco-friendly materials that can partially replace cement in mixtures intended for 3D printing. The test samples were placed in the calorimeter immediately after mixing and recording the exact actual mass with an accuracy of 0.001 g. Due to the sample volume and the manufacturer's recommendations, the tests were conducted on pastes rather than 3D printed concrete mixture. Keywords: biochar; cement; concrete; doi; fines; flow; increase; materials; mixture; printing; replacement; shrinkage; strength; water
• Reuse of sheep wool fibers in the production of ultralightweight foamed concrete: effect of fiber treatment, length, and content on the mechanical properties by Bravo Celi, Adriana; Falliano, Devid; Parmigiani, Silvia; Suarez-Riera, Daniel; Ferro, Giuseppe Andrea; Restuccia, Luciana (2024) - Some characteristics of high strength fiber reinforced lightweight aggregate concrete, Cem Concr Compos, 25(2), pp. Figure 8: Effect of wool fiber length on flexural strength (a); effect of wool fiber content on flexural strength (b). Keywords: concrete; content; density; doi; fiber; fiber content; fig; length; properties; strength; treatment; wool
• Investigating the repair of cracks through bacterial self-healing for sustainable concrete in aggressive sulfate attack environments by Ahmad, Seleem; Elmenshawy, Yasmine; El Gammal, Yasser Osman; El-Sheikh, Hamees Mohamad; Moawad, Mohamed; Elshami, Ahmed A.; Elmahdy, Mohamed A.R. (2024) - Figure 4: The impact of the curing type on concrete compressive strength for specimens without pre-cracking:(A) at the age of 7 days, (B) at the age of 28 days, (C) at the age of 56 days, and (D) at the age of 120 days. Each mix produced three 100×100×100 mm cubic specimens, which were then tested for compressive strength after curing in freshwater or sulfate for 7, 28, 56, and 120 days, T Y. Elmenshawy et alii, Fracture and Structural Integrity, 71 (2025) 194-210; DOI: 10.3221/IGF-ESIS.71.14 196 in accordance with the guidelines of British Standards No. 12390-3:2019, . Keywords: bacillus; bacteria; calcium; concrete; curing; days; doi; healing; mix; samples; self; specimens; strength; sulfate; type
• Improved flexural behaviour of reinforced concrete beam strengthened using stainless steel wire mesh by Shah, Shail; Raithatha, Parth; Raiyani, Sunil (2025) - The use of wire mesh-epoxy composite for enhancing the flexural performance of concrete beams. Microsoft Word - numero_71_art_04_5173.docx S. Shah et alii, Fracture and Structural Integrity, 72 (2025) 34-45; DOI: 10.3221/IGF-ESIS.72.04 34 Improved flexural behaviour of reinforced concrete beam strengthened using stainless steel wire mesh Shail Shah, Parth Raithatha, Sunil D. Raiyani Nirma University, India 20BCL102@nirmauni.ac.in, 20BCL095@nirmauni.ac.in, sunil.raiyani@nirmauni.ac.in KEYWORDS. Keywords: beams; concrete; cracking; doi; load; specimen; sswm; steel; strengthening; wrapping
• Long-term development of mechanical properties of concrete with different water to cement ratio and internal curing ability by Bílek, Vlastimil; Pesata, Michal; Matyskova, Katerina; Miarka, Petr (2024) - Water was not able to penetrate inside, the volume density of water cured and foil wrapped specimens are nearly the same. Concrete with w/c = 0.30 at the age of 28 days shows better frost resistance in the case of water cured beams. Keywords: cement; concrete; curing; days; foil; lwa; strength; water
• Integral bridge abutment with composite dowels: structural scheme and failure patterns by Di, Di; Xiong, Zhihua; Wang, Hui; Pan, Zhenhua; Feldmann, Markus (2025) - Numerical simulations of steel integral abutment bridges under thermal loading. wherein steel girders are directly placed on steel piles. Keywords: abutment; bearing; bridge; capacity; concrete; dowels; failure; fig; girder; joint; load; plate; reinforcement; steel; steel girder
• Optimizing different damaged reinforced concrete corbel characteristics utilizing CFRP sheets by Aborgheef, Salah; Jabbar Abdulridha , Abdulkhalik (2025) - Specimen designation Description Control Referential Specimen without CFRP SCS-0-1 Corbel without damaged Strengthening with side wrapping CFRP sheets (configuration-1) RCS-50-1 Corbel with 50% damaged repairing with side wrapping CFRP sheets (configuration-1) RCS-60-1 Corbel with 60% damaged repairing with side wrapping CFRP sheets (configuration-1) RCS-70-1 Corbel with 70% damaged repairing with side wrapping CFRP sheets (configuration-1) SCST-0-2 Corbel without damaged Strengthening with strip wrapping CFRP sheets (configuration-2) RCST-50-2 Corbel with 50% damaged repairing with strip wrapping CFRP sheets (configuration-2) RCST-60-2 Corbel with 50% damaged repairing with strip wrapping CFRP sheets (configuration-2) RCST-70-2 Corbel with 70% damaged repairing with strip wrapping CFRP sheets (configuration-2) Table 1: Corbel specimens’ descriptions. Two types of CFRP reinforcement were used: full-side wrapping (Configuration 1) and strip wrapping over cracks (Configuration 2). Keywords: cfrp; concrete; corbels; damage; doi; load; sheets; specimens; strip; ultimate; wrapping
• Implementation of interface damage model with friction to concrete-FRP shear connector by Kormaníková, Eva; Vodička, Roman; Dubecký, Daniel; Weissová, Michala (2025) - Microsoft Word - numero_74_art_14_5501.docx R. Vodička et alii, Frattura ed Integrità Strutturale, 74 (2025) 206-216; DOI: 10.3221/IGF-ESIS.74.14 206 Implementation of interface damage model with friction to concrete- FRP shear connector Roman Vodička, Eva Kormaníková, Daniel Dubecký, Michala Weissová Technical University of Košice, Slovakia roman.vodicka@tuke.sk, http://orcid.org/0000-0002-7702-3126 eva.kormanikova@tuke.sk, http://orcid.org/0000-0003-0770-0504 daniel.dubecky@tuke.sk, http://orcid.org/ 0000-0003-3351-2814 michala.weissova@tuke.sk, https://orcid.org/0000-0001-8894-9234 KEYWORDS. Citation: Vodička, R., Kormaníková, E., Dubecký, D., Weissová, M., Implementation of interface damage model with friction to concrete-FRP shear connector, Fracture and Structural Integrity, 74 (2025) 206-216. Keywords: concrete; connector; damage; doi; energy; friction; frp; interface
• Diagnostics and experimental analysis of 3D printed concrete structural elements by Hrabova, Kristyna; Velát, Matěj; Schmid , Pavel; Daněk , Petr; Dvořák , Richard (2025) - Existing regulations, such as EN 12390 or ASTM C39, do not provide procedures for testing printed specimens or for interpreting anisotropic behaviour. Compressive strength tests were carried out on cubic specimens in accordance with EN 12390-3, using a hydraulic testing machine at a loading rate of 0.6 ± 0.2 MPa/s, which corresponds to approximately 3 kN/s for a 68 mm cube. Keywords: bending; columns; concrete; cp18; doi; failure; interlayer; layers; print; specimens; strength; testing
• Sismabeton: a new frontier for ductile concrete by Chiaia, Bernardino; Fantilli, Alessandro P.; Vallini, Paolo (2013) - Active confinement is due to external stresses 3 applied by multi-axial compression tests on cubes in two or three directions, or by triaxial tests on cylinders (see the book by van Mier Post-peak comparison in terms of F(w) A more accurate comparison between the post-peak responses of Sismabeton, NC and SC under compression can be conducted in terms of F(w) (Fig.7). Keywords: compression; concrete; confinement; peak; post; sismabeton; specimens; stress

• Estimate of compressive strength of an unidirectional composite lamina using cross-ply and angle-ply laminates by Scafè, M.; Raiteri, G.; Brentari, A.; Dlacic, R.; Troiani, E.; Falaschetti, M. P.; Besseghini, E. (2014) - Back-out Factor; Compressive strength; Unidirectional lamina; Cross-ply laminate; Angle-ply laminate. RESULTS AND DISCUSSION verall 60 tests were carried out, as follows: 24 tests for cross-ply laminates (materials A and B with 10 instrumented and 14 not instrumented tests), 24 tests for angle-ply laminates (materials C and D with 12 instrumented and 12 not instrumented tests) and 12 tests for UD laminates (materials E and F, with 10 instrumented and 2 not instrumented tests). Keywords: angle; cross; failure; plies; ply; results; strength; test
• Transverse strength of railway tracks: part 2. Test system for ballast resistance in line measurement by De Iorio, Antonio; Grasso, Marzio; Penta, Francesco; Pucillo, Giovanni Pio; Rosiello, Vincenzo (2014) - The combined effect of the longitudinal compression loads due to the breaking (which add to the ones of thermal nature already present in the track) and the up-lift phenomenon of the short track segment included between two consecutive bogies, which is responsible of track lateral strength decrease, can also very often create, the most favourable conditions for the buckling initiation. [9] Kish, A., Samavedam, G., Wormley, D., Fundamentals of track lateral shift for high speed rail applications, Keywords: actuators; ballast; fig; load; rails; sleeper; strength; system; test; track
• On the use of the Theory of Critical Distances to estimate the dynamic strength of notched 6063-T5 aluminium alloy by Yin, T.; Tyas, A.; Plekhov, O.; Terekhina, A.; Susmel, L. (2014) - As briefly mentioned above, the state of the art [1-7] shows that, in general, the mechanical response, the mechanical properties, and the cracking behaviour of metallic materials subjected to dynamic loading are different from the ones observed under quasi-static loading. Quasi-static loading was generated by slowly increasing the pneumatic driving load on the cross head, whilst dynamic loading was produced by storing pressurised air in a reservoir and releasing this suddenly to the cross-head by bursting a retaining diaphragm at the outlet of the reservoir. Keywords: loading; material; method; rate; strength; stress; tcd
• Scaling of compression strength in disordered solids: metallic foams by Ková?ik, J.; Jerz, J.; Mináriková, N.; Marsavina, L.; Linul, E. (2016) - The scaling of compression strength with porosity for aluminium foams was investigated. Metallic foams; Aluminium foams; Compression; Compression strength; Percolation. Keywords: aluminium; compression; foams; metal; scaling; skin; strength
• Novel magnetic composites based on water soluble unsaturated polyester resin and iron oxide nanoparticles by Velev, Petar; Bryaskova, Rayna (2016) - The synthesis of magnetic nanoparticles is a complex process because of their colloidal nature. The most used methods for the synthesis of magnetic nanoparticles is precipitation of iron salts. Keywords: composites; content; copolymerization; magnetic; nanoparticles; polyester; resin; strength; water
• Modelling of fracture processes in laminate composite plates with embedded delamination by Tashkinov, Mikhail A. (2016) - Fiber failure criterion is set with the following equation:  f Thus, elements were subject to removal if the conditions of fiber failure criterion were met. Keywords: composite; criteria; defect; delamination; doi; failure; materials; ply; properties; sample; strength
• On the use of length scale parameters to assess the static strength of notched 3D-printed PLA by Ahmed, Adnan A.; Susmel, Luca (2017) - The definitions for σeff calculated according to Eqs (3) and (4) make it clear that inherent material strength σ0 plays a role of primary importance when the TCD is used to assess static strength of notched components. This paper aims to investigate the accuracy of the Theory of Critical Distances (TCD) in estimating static strength of notched additively manufactured PLA as both notch sharpness and infill angle vary. Keywords: fig; manufacturing; material; pla; specimens; strength; stress; tcd; theory
• Study on the effect of new type liquid accelerator on the performance of shotcrete by Zhang, Luchen; Li, Shuchen; Yan, Qin; Zhu, Lin (2017) - It also can be seen from the figures that the plastic zone of surrounding rock supported by shotcrete added with new liquid accelerator is obviously smaller than that of surrounding rock supported by shotcrete added with the traditional accelerator. Liquid accelerator; Shotcrete; Primary support; Stress release of surrounding rock; Numerical simulation. Keywords: accelerator; cement; compressive; dosage; liquid; ratio; rock; setting; shotcrete; strength; support; time; water
• Carbon nano-tubes in improving the mechanical property of cement-based composite materials by Wu, Xu; Dai, Li (2017) - Relevant studies [2-4] suggested that, the addition of an appropriate amount of carbon materials in cement base can not only enhance the mechanical property and crack resistance, but also impart a favorable voltage-sensitive property. The results demonstrated that, the addition of carbon nano-tubes could significantly relieve the mechanical properties of cement based composite materials. Keywords: bending; carbon; carbon nano; cement; compressive; materials; nano; properties; strength; tubes
• Research of the effectiveness of mechanical testing methods with analysis of features of destructions and temperature effects by Babushkin, A.V.; Lobanov, D.S.; Kozlova, A.V.; Morev, I.D. (2013) - In this paper is carried out the comparative analysis of effectiveness of test methods of determination of stiffness and strength properties of highly filled unidirectional fiberglass (Direct E roving 0.7 - orthophthalic polyester resin 0.3) via tensile testing along the reinforcement and three-point bending testing at several bases. Composite materials; Highly filled fiberglass; Test methods; Deformation and failure; High and low temperature. Keywords: bending; fiberglass; polyester; specimen; strength; tensile; test
• The numerical simulation of ceramic composites failure at axial compression by Makarov, P.V.; Eremin, M.O. (2013) - the preparatory process of accumulation of inelastic deformations and damages in brittle media is localized in certain areas. The problem of the evolutionary equations of the second group is the definitions of rates of inelastic deformations in the Eq. Keywords: composite; content; evolution; failure; hardening; loading; makarov; particles; regime; state; strength
• An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials by zhou, xiaoping; Huang, Xiaocheng; Berto, Filippo (2018) -                       cl cl cl cls m n s s s m n3 2 2 1 3 2 3 1 3 2 3 0 (32) where s n, and m are the strength parameters which are determined by experiments.                  A Keywords: c c; cos; sin; strength;  ;  c
• Development of an optimal process for friction stir welding based on GA-RSM hybrid algorithm by Mehri Khansari, Nabi; Berto, Filippo; Karimi, Namdar; Ghoreishi, S.M.N; Fakoor, Mahdi; Mokari, Mozhgan (2018) - In addition, friction stir welding is a recent technique that utilizes a non-consumable rotating welding tool to generate frictional heat and plastic deformation at the welding location Sharma has given a convenient overview of friction stir welding of aluminum to copper [11]. Keywords: aa5050; doi; friction; optimization; response; rsm; speed; stir; strength; surface; tensile; tool; welding
• Graphene Oxide on the Microstructure and Mechanical Properties of Cement Based Composite Material by Pang, Jinchang; Yeming, Wang (2018) - The results demonstrated that the bending and compressive strength of graphene oxide reinforced cement based composite material improved firstly and then declined with the increase of the mixing amount of graphene oxide, and moreover the improvement of the bending strength was obvious than that of the compressive strength. [15] studied the mechanical properties of graphene oxide reinforced cement based composite material and found that the tensile strength had an improvement of 48% when the weight proportion of graphene oxide was 1.5%. Keywords: bending; cement; composite; graphene; material; oxide; properties; ratio; specimens; strength; water
• Development of hybrid friction stir welding and adhesive bonding single lap joints in aluminium alloys by Maciel, Ricardo Leite; Infante, Virginia; Braga, Daniel; Moreira, Pedro; Bento, Tiago; da Silva, Lucas (2019) - 10.3221/IGF-ESIS.48.28 276 Figure 11: Fixation system: a) CAD model; b) laboratory set-up The FSW and FS Weld-bonded parameters used in this study were selected from a combination of trial and error and previous experience in manufacturing FSW lap joints. The FSW and hybrid joints were benchmarked under static loading and classified according to its efficiency. Keywords: adhesive; bonding; defect; doi; fig; figure; force; fsw; hybrid; joints; kgf; mode; process; strength; welding
• Interfacial shear strength of carbon nanotubes based hybrid composites: effect of loading rate by Bedi, Harpreet Singh Singh; Billing, Beant Kaur; Agnihotri, Prabhat K (2019) - Single fiber micro-droplet debond tests are carried out on unsized and CNT grafted carbon fiber epoxy composites at two displacement rates of 0.05 and 5 mm/min. Hierarchical composites reinforced with carbon nanotube grafted fibers: the potential assessed at the single fiber level, Chem. Keywords: carbon; cnt; cnts; composites; epoxy; fiber; ifss; matrix; strength; surface
• A new method for testing the interfacial shear properties between rock and early-aged shotcrete by Liu, Jian-guo; Zhou, Xiao-jun; Zhao, Wei; Shen, Yu-sheng; Xiao, Qing-hua (2019) - Shotcrete-rock interface; New test method; Direct shear test; Time-dependent behaviors; Interfacial shear properties. IMPROVED TEST METHOD irect shear test has always been used as the evaluation method for the shear properties of the interface formed by shotcrete and rock. Keywords: fig; interface; mould; properties; rock; samples; shear; shotcrete; strength; test; time
• Characterizations of TIG welded joints of Unalloyed Commercially Pure Titanium Gr-2 for Weld Process Parameters by Patil, Hiralal S.; PATEL, D. C; PATIL, C. S (2019) - B T H. S. Patil et alii, Frattura ed Integrità Strutturale, 48 (2019) 377-384; DOI: 10.3221/IGF-ESIS.48.36 381 Figure 2: Tensile test specimens for welded samples The tensile properties of welded titanium for different joints were measured at room temperature. No Significant Defects Acceptable 6 95 30 0.5 Porosity/Lack of Penetration Rejected 7 100 20 1 Porosity Acceptable 8 100 25 0.5 Porosity Acceptable 9 100 30 0.75 Porosity/ Lack of Fusion Reject Table- 5: Radiography observation/remarks of v-joints The presence of porosity, lack of penetration and fusion in TIG welded joints was observed in Ti-Gr2. Keywords: fusion; gas; joints; metal; parameters; strength; tensile; tig; titanium; welding; zone
• Experimental analysis of aluminium/carbon epoxy hybrid laminates under flexural load by Bellini, Costanzo; Di Cocco, Vittorio; Iacoviello, Francesco; Sorrentino, Luca (2019) - Fibre metal laminate; Flexural load; Structural behaviour. [10], that produced and tested some CARALL specimens presenting carbon fibre laminate as outside layers. Keywords: adhesive; aluminium; behaviour; composite; doi; laminates; layers; material; metal; strength; stress; thickness; type
• Experimental and numerical investigation of the properties of the Hot Mix Asphalt Concrete with basalt and glass fiber by Ameri, Mahmoud; Nemati, Mehdi; Shaker, Hamid; jafari, Faezeh (2019) - The main purpose of this research is to evaluate the characteristics of the asphalt mixture while using basalt fiber and glass fiber. Figure 2: The shape of fiber (a) basalt fiber b) glass fiber Keywords: asphalt; basalt; basalt fiber; bitumen; fibers; flow; glass fiber; mix; percentage; results; samples; strength; test
• Relationship between microscopic analysis and quantitative and qualitative indicators of moisture susceptibility evaluation of warm-mix asphalt mixtures containing modifiers by Farazmand, Pooyan; Hayati, Parham; Shaker, Hamid; Rezaei, Sajad (2019) - On the other hand, the image processing of asphalt mixture specimens was first conducted for a project entitled “thermography image processing in an asphalt core” in 1993 at the University of Southern California. Given the defects of bitumen in asphalt mixtures particularly exposed to moisture, this study mainly aims to investigate the relationship between qualitative and quantitative results of moisture susceptibility tests on asphalt mixtures modified by ZycoTherm, nanoclay, nanosilica and SBS. Keywords: asphalt; bitumen; moisture; results; sem; specimens; strength; susceptibility; tensile; test; water
• Experimental and Numerical Analysis of Epoxy Based Adhesive Failure on Mono- and Bi-Material Single Lap Joints Under Different Displacement Rates by Ghahramanzadeh Asl, Hojjat; Çam, Salim; Orhan, Osman; Özel, Adnan (2020) - Due to the difficulties of joining of two or more different materials, adhesive joints become more suitable in the application. Single lap joint (SLJ) is widely used for adhesive joints due to its easy application, simple geometry and explicit results in order to understand joint strain rate dependency [3]. Keywords: adhesive; displacement; doi; failure; fig; joints; loads; min; rate; results; strength; stress; surface; thickness
• Interlaminar shear strength study on CFRP/Al hybrid laminates with different properties by Bellini, Costanzo; Di Cocco, Vittorio; Sorrentino, Luca (2019) - Interlaminar shear strength of fibre metal laminates after thermal cycles, Compos. Analytical evaluation on uniaxial tensile deformation behavior of fiber metal laminate based on SRPP and its experimental confirmation, Compos. Keywords: adhesive; composite; doi; ilss; laminate; metal; shear; strength; thickness
• Comparison of mechanical performance between friction-stir spot welded and adhesive bonded joints by Reis, Paulo NB; Amaro, Ana; Loureiro, Altino (2020) - Therefore, FSSW technique proves to be an alternative to adhesive bonded joints, offering the same strength. Citation: Amaro, A. M., Loureiro, A., Reis, P.N.B., Comparison of mechanical performance between friction-stir spot welded and adhesive bonded joints, Frattura ed Integrità Strutturale, 53 (2020) 124-133. Keywords: adhesive; doi; figure; friction; joints; lap; stir; strength; welding
• Prediction of mechanical behavior of friction stir welded joints of AA3003 aluminum alloy by Chekalil, Ismail; Miloudi, Abdelkader; Planche, Marie-Pierre; Ghazi, Abdelkader (2020) - Microsoft Word - numero_54_art_11_2851 I. Chekalil et alii, Frattura ed Integrità Strutturale, 54 (2020) 153-168; DOI: 10.3221/IGF-ESIS.54.11 153 Prediction of mechanical behavior of friction stir welded joints of AA3003 aluminum alloy I. Chekalil, A. Miloudi University of Djillali Liabes, Laboratory of Materials and Reactive Systems (LMSR), Sidi Bel Abbès, Algeria chekalil1ismail@gmail.com, miloudidz@yahoo.fr M.P. Planche University of technology Belfort-Montbeliard, Carnot de Bourgogne interdisciplinary laboratory (ICB-LERMPS), Belfort, France marie-pierre.planche@utbm.fr A. Ghazi University of Mascara, Laboratory of Materials and Reactive Systems (LMSR), Mascara, Algeria ghaziaek@yahoo.fr ABSTRACT. Predicting grain size and tensile strength of friction stir welded joints of AA7075-T6 aluminium alloy, Mater. Keywords: doi; friction; min; parameters; speed; stir; strength; tensile; tool;  
• Experimental studies of different quenching media on mechanical and wear behavior of Al7075/SiC/Al2O3 hybrid composites by Ravikumar, M.; Reddappa, H.N.; Suresh, R.; Sreenivasa Reddy , M. (2020) - Investigation of particle size and amount of alumina on microstructure and mechanical properties of Al matrix composite made by powder metallurgy. The fabrication of Al composites with different weight percentages of Al2O3 particles was processed by liquid metallurgy route. Keywords: al2o3; composites; hardness; heat; matrix; mmcs; particles; particulates; properties; sic; strength; wear
• Assessment of the strength reliability of high-temperature heat exchangers with long service life at the design stage by Popov, Vyacheslav; Kashelkin, V.V.; Demidov, A.S. (2020) - On the contrary, in order to obtain a more conservative result, it is necessary to obtain the minimum and maximum value of the calculated stresses for the model under study in order to determine the calculation error “relative to oneself” for further calculation of the values necessary for assessing reliability F and  F necessary for assessing reliability. [6], from where               2 22 2 R F R FR F (10) where R and  F are the object of the investigation - are the coefficients of variation of the random variables R and F; Ψ - the mathematical expectation of a random variable, in this case, the meaning of the mathematical expectation difference  Ψ R F . Keywords: reliability; strength; stresses; time; variation
• Evaluation of the survivability of CFRP honeycomb-cored panels in compression after impact tests by Staroverov, Oleg; Strungar, Elena; Wildemann, Valery (2021) - Figure 9: Profiles of out-of-plane displacement horizontal distribution on the surface of carbon fiber sample panels in post-impact compression tests.       If we compare the nature of destruction of fiberglass and carbon fiber sample panels, the damages have a similar topology. Keywords: carbon; cfrp; composite; compression; deformation; doi; energy; fiber; fields; fig; impact; panels; sample; strength; tests
• Study on Micro - Nano Sized Al2O3 Particles on Mechanical, Wear and Fracture Behavior of Al7075 Metal Matrix Composites by Ravikumar, M.; Reddappa, H. N. ; Suresh, R.; Babu, E. R. ; Nagaraja, C. R. (2021) - Microstructure and interface characteristics of B4C, SiC and Al2O3 reinforced Al matrix composites: a comparative study. The Energy Dispersive Spectroscopy study of nano particles reinforced composite is shown in Fig. Keywords: al2o3; composites; matrix; micro; mmcs; nano; particles; particulates; strength; tensile; wear
• The investigation of additive manufacturing and moldable materials to produce railway ballast grain analogs by Szabó, Bence; Pásthy, L.; Orosz, Á.; Tamás, K. (2022) - Specimens were made from railway ballast materials, three groups of moldable materials (materials used in the construction industry, thermosetting polymers, and certain low-strength materials) and additively manufactured polymers. The mechanical properties of polymers differ significantly from the properties of railway ballast materials, because their failure mode is large plastic deformation. Keywords: ballast; compression; doi; failure; fig; grains; materials; polyester; railway; specimens; strength; tests
• Mechanical Characterization and Tensile Fractography of Al7075-WCP-CoP Composite by Gopal Krishna, U. B. ; Vasudeva, B.; Auradi, Virupaxi ; Nagaral, Madeva (2022) - Among the various types of composites, metal matrix composites have wider applications owing to their enhanced material properties. Fabrication of A356 aluminium alloy matrix composite with CNTs-Al2O3 hybrid reinforcements. Keywords: al7075; alloy; composites; doi; matrix; particles; properties; strength; wt.%
• Statistical evaluation of the effect of hygrothermal aging on the interlaminar shear of GFRP by Lobanov, Dmitriy; Yankin, Andrey S; Berdnikova, Nataliya I (2022) - The paper presents the results of mechanical tests for interlaminar shear of specimens of structural glass/epoxy composite electrical use before and after preliminary hygrothermal aging in operating environments (process water, sea water, machine oil) of various duration (15, 30 and 45 days) and various temperatures (22, 60 and 90 oC). Experimental study of structural fiberglass/epoxy STEF specimens after hygrothermal aging in different liquids (process water, sea water, machine oil) at 22, 60 and 90oC for 15, 30 and 45 days is carried out (Table 1). Keywords: aging; days; effect; interlaminar; oil; process; sea; sea water; shear; strength; temperature; time; value; water
• On the peak strength of 7050 aluminum alloy: mechanical and corrosion resistance by Rivolta, Barbara; Gerosa, Riccardo; Boniardi, Marco; Casaroli, Andrea (2022) - For this alloy, the Standard establishes T7X tempers which were developed to obtain a very good compromise between mechanical strength and corrosion resistance. Moreover, the corrosion test data indicates that this new heat treatment produces corrosion resistance similar to that of the T76 heat treatment. Keywords: ageing; alloy; aluminum; corrosion; doi; peak; precipitates; resistance; standard; strength; treatment; ° c
• A Study on microstructure, mechanical and fracture behavior of Al2O3 - MoS2 reinforced Al6061 hybrid composite by Suchendra, K. R.; Sreenivasa, Reddy M ; Ravikumar, M. (2022) - Evaluation of the microstructure and thermal properties of (ASTM A 494 M grade) nickel alloy hybrid metal matrix composites processed by sand mold casting. The manufacture of Al matrix composites is undertaken through squeeze casting, stircasting and powder metallurgy methods. Keywords: al2o3; composites; hybrid; matrix; mmcs; mos2; particulates; properties; strength; tensile
• Investigation of the Effect of Yarn Waste Fibers and Cocamide Diethanolamide Chemical on the Strength of Hot Mix Asphalt by Saltan, Mehmet; Kaçaroğlu, Gizem; Karadağ, Öznur (2022) - In order to prevent deformations by improving pavement performance, bituminous binder has been modified with various additives and many studies which aim to improve bituminous binder properties have been carried out [2-7]. [28] Hajiloo, H. R., Karimi, H. R., Aliha, M. R. M., Zanjirani Farahani, H., Salehi, S. M., Hajiloo, M. and Jafari Haghighatpour, P. (2022). Keywords: asphalt; binder; cdea; doi; fibers; mixtures; moisture; samples; strength; tensile; waste; yarn
• Impact of nano sized SiC and Gr on mechanical properties of aerospace grade Al7075 composites by Ravikumar, M.; Nail, Rudra (2022) - 3 shows the density and porosity of SiC and Gr reinforced hybrid Al composites. The manufacture of Al matrix composites is undertaken through squeeze casting, stircasting and powder metallurgy methods. Keywords: composites; hybrid; matrix; mmcs; particles; particulates; properties; strength; tensile
• Mechanical Behaviour and Fractured Surface Analysis of Bauxite Residue and Graphite Reinforced Aluminium Hybrid Composites by Anil, K. C.; Kumaraswamy, J.; Reddy, Mahadeva; Prakash, Bhograj (2022) - Review of recent Studies in Al matrix composites, International Journal of Scientific & Engineering Research, 3(6), pp 1-16. Evaluation of the microstructure and thermal properties of (ASTM A 494 M grade) nickel alloy hybrid metal matrix composites processed by sand mold casting, International Journal of Ambient Energy,42, pp. 1-10. Keywords: alloy; aluminum; composites; doi; engineering; grp; hybrid; materials; matrix; mud; particles; properties; rmp; strength
• Fracture micrographic analysis of a carbon FML under three-point bending load by Bellini, Costanzo; Di Cocco, Vittorio; Iacoviello, Francesco; Mocanu, Larisa Patricia (2022) - Fibre metal laminates; Fracture features; Flexural behaviour. [3] Şen, I., Alderliesten, R.C., Benedictus, R. (2015) Lay-up optimisation of fibre metal laminates based on fatigue crack propagation and residual strength. Keywords: adhesive; aluminium; carbon; composite; doi; failure; fibre; laminates; metal; specimens; strength
• Mechanical characterization and analysis of tensile fracture modes of ultrasonically stir cast Al6082 composites reinforced with Cu powder premixed Metakaolin particles by J Bright, Renjin; Hariharasakthisudhan, P. (2022) - 5d represents T6 heat-treated AMC with 7.5 wt. % Metakaolin composite in which the grain boundaries were occupied by Metakaolin particles. R. J. Bright et alii, Frattura ed Integrità Strutturale, 62 (2022) 426-438; DOI: 10.3221/IGF-ESIS.62.29 431 Composite Sample Metakaolin Cu (wt.%) Al6082 Keywords: amc; amcs; cast; heat; matrix; metakaolin; particles; strength; wt.%; wt.% cu; wt.% metakaolin
• Analysis of the structural integrity of a frozen wall during a mine shaft excavation using temperature monitoring data by Levin, Lev; Semin, Mikhail; Golovatyi, Ivan (2022) - Numerical interpretation of temperature distributions from three ground freezing applications in urban tunnelling. The problem of determining the temperature of the brine at the stage of maintaining the FW thickness was considered only within the framework of the analysis of temperature fields [17]. Keywords: freezing; load; properties; shaft; soil; strength; t t; temperature; time
• Effect of friction-welding parameters on the tensile strength of AA6063 with dissimilar joints by Chapke, Yashwanth; Kamble, Dinesh N. (2022) - Microstructure characterisation and properties of carbon steel to stainless dissimilar metal joint made by friction welding. Numerical simulation of dissimilar metal welding and its verification for determination of residual stresses, Frattura ed Integrità Strutturale, 36, pp. Keywords: aa6063; aisi4130; doi; friction; joints; parameters; pressure; steel; strength; tensile; tensile strength; welding
• Numerical analysis of isolated end-flattened steel bars under compression in space trusses by de Araujo Rosa Cruz, Henrique; Mendes Bezerra, Luciano; Vital da Silva, Welington; Silva, Ramon (2022) - In the research carried out by Dundu [22] on the strength and stability characteristics of space trusses made up of steel bars with flattened extremities, the author describes two forms of failure for the main structural elements, when subjected to compressive loads: global buckling or excessive deformation of the transition zone of cross-sections at the ends of the bars. In 2010, a roof of a sports gymnasium located in Spain, in space truss with flattened bars, collapsed due to snow loading, which resulted in buckling of the diagonals of the trusses Keywords: analysis; bars; buckling; compression; cross; doi; failure; load; lpf; models; numerical; ratios; results; slenderness; space; steel; steel bars; strength
• Influence of Quenching Agents on Mechanical, Wear, and Fracture Characteristics of Al2O3 / MoS2 Reinforced Al-6061 Hybrid Metal Matrix Composite (MMCs) by Suchendra, K. R.; Sreenivasa Reddy, M.; Ravikumar, M. (2022) - The hardness of developed hybrid composites is depicted in Fig. Further, the hardness of developed hybrid composites gradually decreased with increase in the MoS2 content. Keywords: al2o3; composites; hardness; heat; hybrid; matrix; mmcs; mos2; particulates; strength; wear
• Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites by Gotagunaki, Santhosh; Mudakappanavar, Vardhaman S.; Suresh, R. (2022) - The Y2O3 particulate reinforcement percentage was varied from 1 to 3% in the steps of 1% to study its influence on mechanical properties of MMCs. [13] investigated the influence of TiB2 % on mechanical properties of TiB2/Mg MMC. Keywords: alloy; az91d; composites; doi; hybrid; matrix; mmcs; properties; strength; tensile; y2o3
• Mechanical and Fractured surface characterization of epoxy/red mud/fly ash/ aluminium powder filled hybrid composites for automotive applications by Anil , K. C.; Hemavathi, A.B.; Adeebpasha, A. (2023) - The result shows that red mud and fly ash filled composites were better than aluminium powder filled composites. Among thermoset based polymer composites, epoxy composites are preferred for many advanced applications due to its versatile properties and tailor-made processing [9]. Keywords: aluminium; ash; composites; doi; epoxy; filler; fly; hybrid; mud; powder; properties; strength; tensile
• Modelling of fresh properties and strength activity index with microstructure characterisation of ternary cement incorporating waste glass and granulated blast furnace slag by Daguiani, Salah Eddine; Kessal, Oussama; kriker, Abdelouahed; Mokhtari, Abdessamed (2023) - From the test results, each 7.5 % of WGP cement replacement decreases water requirement by 0.5 %. The chemical and physical properties of used cement are summarised in Tab. Keywords: activity; cement; consistency; doi; ggbs; glass; index; paste; replacement; results; setting; slag; strength; time; wgp; wgp ggbs;  
• Fractography and Tensile studies on the effect of different carbon fillers reinforced hybrid nanocomposites by Shetty, Balachandra P.; Naveen, G. J. (2023) - Visual inspection was performed on all the samples, including the plain silicone, silicone with carbon black, silicone with carbon graphite, and silicone with carbon nanotube composites. By examining images of the broken surfaces of the silicone, silicone with carbon black, carbon graphite, and carbon nanotube composites using T B. P. Shetty et alii, Frattura ed Integrità Strutturale, 66 (2023) 220-232; DOI: 10.3221/IGF-ESIS.66.14 224 SEM, the particle distribution, fracture process, and interfacial bonding of the composite can be analyzed at a 100-micron scale. Keywords: black; carbon; carbon black; carbon fillers; carbon graphite; composites; elastomers; fillers; materials; properties; silicone; strength; tensile; tensile strength
• Characterization of the mechanical properties and microstructural evolution of martensitic steel in repeated tempering cycles by Shelar, Amitkumar; Ronge, B. P. (2023) - Tempering conditions (hrs) Lath Length (μm) Lath width (μm) 1 2 5-6.5 0.34-0.88 2 4 7.1-9.4 0.5-1.0 3 6 10.0-13.3 0.9-1.4 4 8 6.3-11.7 0.73-0.81 Table 7: Comparison of lath length and width with tempering conditions. From such conditions, it can be concluded that from single tempering to double tempering condition % elongation increases and the morphology observed is martensite lath, in double and third tempering % elongation is nearly same which indicate that further carbide precipitates without much change in ductility and with the further tempering the width of the martensite laths increases as stresses are getting relieved and the %elongation increasing indicating material becomes softer. Keywords: carbides; cycles; doi; figure; h13; hardening; martensite; properties; steel; strength; tempering; time; wear
• The effect of containing Al2O3 microparticles in different matrix polymers on properties of pineapple fiber-reinforced composites by Mawardi, Indra; Razak, Hanif; Akadir, Zaini; Jaya, Ramadhansyah Putra (2023) - Effect of micro-Al2O3 contents on mechanical property of carbon fiber reinforced epoxy matrix composites, Composites Part B: Engineering, 91, pp. 392–398, DOI: 10.1016/j.compositesb.2016.01.052. Experimental investigation of mechanical and morphological properties of flax fiber reinforced epoxy composites incorporating SiC and Al2O3, Materials Today: Keywords: al2o3; composites; doi; effect; epoxy; epoxy composites; fiber; filler; hardness; matrix; palf; pineapple; properties; strength; tensile; uprs; uprs composites
• Ultrasonic welding of lap joints of PEI plates with PEI/CF-fabric prepregs by Alexenko, Vladislav; Tian, Defang; Panin, Sergey; Bochkareva, Svetlana; Panov, Iliya (2024) - USW duration, ms PEI/CF-fabric ratio 23/77 30/70 43/57 400 0.10 0.05 0.04 500 0.13 0.11 0.05 600 0.12 0.11 0.11 700 0.13 0.12 0.15 800 0.15 0.15 0.21 Table 3: The USW lap-joint thinning values for different USW duration vs PEI/CF-fabric ration combinations. In this study, as a model approximation, the authors have investigated USW joints, consisting of two plates (adherends) of high performance plastic polyetherimide (PEI). Keywords: adhesion; alexenko; composites; doi; fabric; fig; joints; lap; pei; prepreg; properties; ratio; strength; tensile; usw; welding
• Optimization of clamshell content for improved properties in bamboo-epoxy composites by K J, Anand; Ekbote, Thippeswamy (2024) - [29] examined the industrial wastes cenosphere flyash, and cement by-pass dust particulate fillers' effect on water absorption and chemical behaviour of bamboo fibres composites. [39] when they added clamshell filler to jute epoxy composite, impact strength was decreased. Keywords: bamboo; bending; clamshell; composites; doi; epoxy; fibre; filler; hybrid; matrix; properties; strength; tensile
• Influence of soil salinity on the bearing capacity of the frozen wall by Semin, Mikhail; Levin, Lev; Bublik, Sergey; Brovka, Andrey; Dedyulya, Ivan (2024) - The influence of the amount and type of dissolved salt on soil strength is realized indirectly through the unfrozen water content. Loading steps T M. Semin et alii, Frattura ed Integrità Strutturale, 69 (2024) 106-114; DOI: 10.3221/IGF-ESIS.69.08 109 for frozen soil samples varied in the range from 100 to 1000 kPa, depending on preliminary experimental measurements of the instantaneous strength of the soil samples. Keywords: bearing; capacity; chalk; clay; content; freezing; saline; salt; soils; strength; water
• Impact of hybrid nanoparticle reinforcements on Mechanical properties of Epoxy-Polylactic Acid (PLA) Composites: Impact of hybrid nanoparticle reinforcements on Mechanical properties of Epoxy-Polylactic Acid (PLA) Composites by Umarfarooq, M. A.; Dileep, K.; Srinath, A.; Banapurmath, N.R.; Sajjan, Ashok M. (2024) - These factors lead to better stress transfer and higher tensile strength. Epoxy nanocomposites with GNPs exhibit higher tensile strength than those with MWCNTs due to better stress transfer from higher specific surface area and improved matrix adhesion. Keywords: doi; epoxy; esg1; esm1; gnps; impact; materials; mpa; mwcnts; nanocomposites; pla; properties; strength; tensile
• The Epoxy-based composites with Size-Fractionated Waste Areca Sheath: An Experimental Investigation on the Macroscopic and Vibrational Properties by Varghese, Lijo; Mohan Kumar , G.C. (2024) - For the same weight fraction content(15%) in each category, particulate composite Ep/AS-VF/15,Ep/AS- VF/20,Ep/AS-F/15 and Ep/AS-C/15 ,has damping factor 0.1667,0.11530,0.15909 and 0.1304. Another research into particulate composites, incorporating sunflower husk, hazelnut shell, and walnut shell in epoxy at different weight percentages, unveiled those reinforcements with lower aspect ratios displayed superior hardness and stiffness, owing to the lesser introduction of voids into the composites compared to higher aspect ratio reinforcements [19]. Keywords: areca; areca sheath; composites; control; doi; epoxy; fibre; fraction; particulate; properties; ratio; resin; sheath; specimen; strength; tensile; weight
• Development and mechanical characterization of eggshell bio-filler based hybrid composites by Khan, Afroz; Naveen Kumar, B. K.; Anand, K. J.; Ashoka, E.; Hareesha, G. (2024) - A review of studies on the influence of fillers on bamboo fiber composites revealed that the integration of bio-fillers in bamboo composite presents a promising avenue for enhancing its material properties in eco-friendly applications. Thus, the development of natural fiber composites represents a significant advancement in sustainable engineering, allowing for the development of materials that are not only high-performance but also environmentally friendly. Keywords: bamboo; composites; doi; eggshell; epoxy; fiber; filler; hybrid; impact; matrix; powder; properties; results; strength; tensile
• Mechanical Properties of SiC Nanoparticle-Reinforced Al-2024 Alloy by Niyaz Ahmed, M. B.; Naveen Kumar, H. S.; Kallimani, Anilkumar S.; Alqahtani, Ibrahim; Doddamani, Saleemsab; Hareesha, G. (2025) - Integration of SiC nanoparticles into the Al-2024 alloy matrix is a viable approach in addressing the material's critical obstacles. The novelty of this study includes employing ultrasonic-assisted stir casting to achieve uniform dispersion of SiC nanoparticles in Al-2024 alloy, enhancing hardness and tensile strength for advanced engineering applications. Keywords: al-2024; al2024; alloy; casting; composite; doi; hardness; matrix; nanoparticles; properties; reinforcement; sic; strength; strengthening; tensile; ultrasonic
• Experimental and Computational Study on the Tensile and Flexural Properties of Polylactic Acid filled with Boron Nitride Nanoplatelets by Sundarasetty, Harishbabu; Sahu, Santosh Kumar (2025) - [10] studied the impacts of four different nanofillers on the mechanical characteristics of PLA composites. [12] reported on PLA composites filled with equal weightage of graphene (Gr) and silicon dioxide (SiO2) at 0.1 to 0.5 wt. Keywords: acid; bnnp; composite; doi; experimental; modulus; pla; properties; strength; tensile
• Experimental test on 3D-printing components for Architectural Restoration by Tomei, Valentina; Grande, Ernesto; Imbimbo, Maura (2025) - An investigation of the influence of 3d printing parameters on the tensile strength of PLA material, Mater. [3] investigated the effect on the mechanical performance of 3D printed PLA samples of the filament orientation and flow rates (100% and 120%), by printing rectangular stripes with six layers. Keywords: beam; behavior; components; doi; fig; material; parameters; pla; printing; properties; results; samples; strength; stress; tensile; tests
• Predictive modeling of PMMA-based polymer composites reinforced with hydroxyapatite: a machine learning and FEM approach by Singh, Rohit Kumar; Verma, Khyati; Kumar, G. C. Mohan (2025) - To address this, we employed the Representative Volume Element (RVE) method to model properties across 1–30% HAp, augmenting the sparse experimental data and enabling ML models to learn from a continuous range. In this study it appears that PMMA-HAp composites are superior to HAp composites with an inorganic organic matrix owing to the interaction of the reinforcement with the investigated hybrid composites. Keywords: composite; compressive; data; doi; ffnn; hap; learning; machine; models; modulus; mpa; pmma; properties; rbnn; rve; strength; svm
• Experimental Investigation of Tensile and Bond Strength for a GFRP–SSWM Hybrid Wraps by Kalyani, Vipul; Joshi, Digesh; Patel, Paresh (2025) - Sikadur 30 LP Sikadur 30 LP 1.8 ± 0.1 kg/liter (Part A+B mixed) - ≥ 25 after 7 days of curing ⁓ 10 - Sikadur 330 Specimen Configuration Description of material used Sikadur 30 LP Sikadur 330 No. of Specimens No. of Specimens 1 GG Two layers of GFRP 3 3 2 GS One layer of GFRP and One layer of SSWM 3 3 3 SS Two layers of SSWM 3 3 4 GGG Three layers of GFRP 3 3 5 GSG Two layers of GFRP outside with one layer of SSWM between them 3 3 6 SGS Two layers of SSWM outside with one layer of GFRP between them 3 3 7 SSS Three layers of SSWM 3 3 TOTAL 42 Table 2: Different configurations of coupon specimen for tensile test. Keywords: bond; failure; fig; gfrp; ggg; gsg; hybrid; layer; load; sgs; sikadur; specimens; sswm; strength; tensile
• Studying the strength and damageability of composite element in looped metal-composite joint under tensile loading by Kacharava, Irakly; Ryzhova, Tatiana; Vermel, Vladimir; Shanygin, Alexander; Fomin, Danil; Mirgorodsky, Yury; Kovalyov, Nikolay; Petronyuk, Yulia; Levin, Vadim; Lekomtsev, Sergey (2025) - It was performed with loads up to 200 and 300 kN, which corresponded to 80% and 120% of the calculated breaking load Pmax, resulting in the initial destruction of composite element structure as well as the deformation of metal bolts during connection (Fig. 6b). Figure 11: Acoustic images (C-scans) of composite loop structure in the loaded area: a) initial state at 0.25 mm depth; b) after 200 kN load (80% of Pmax) at 0.25 mm depth; c) after 300 kN load (120% of Pmax) at 0.25 mm depth; d) after a load of 300 kN (120% of Pmax) at 0.2 mm depth. Keywords: composite; design; doi; element; fig; joint; load; loading; loop; metal; strength; structure; tensile
• Study on mechanical, wear, corrosion and fracture characteristics of Al7075 by modifying nano sized Magnesium (n-Mg) element by Ravikumar, M.; Gowda, Hanumanthe; Umesh, G. L.; Manjunath, N. K. (2025) - Magnesium alloys have a number of advantages when used as castings: (i) they can produce castings with thinner walls than aluminum (1-1.5 mm vs. 2-2.5 mm); (ii) they cool faster because magnesium has a lower latent heat of fusion per unit volume; (iii) higher gate pressures can be obtained with relatively low applied pressures because of their low density; and (iv) die soldering in casting dies is less likely because of the limited solubility of iron in magnesium alloys. Natural aging is frequently used to maximize the strength properties of aluminum alloys in demanding applications like automotive and aerospace. Keywords: al7075; alloy; aluminum; corrosion; frattura; hardness; integrità; magnesium; nano; particles; ravikumar; strength; strutturale; wear
• A novel approach to estimation of residual strength of laminated polymer composites under compression after impact by Staroverov, Oleg; Sivtseva, Anastasia; Mugatarov, Artur; Koksharov, Sevastyan (2025) - I – a slight impact influence on strength; II – strength reduction at impact energy increase; III – reaching of minimum bearing capacity, when an increase in impact energy does not lead to a decrease in strength. To determine these threshold values, it is necessary to create mathematical models for describing experimental dependences of the residual strength on impact energy. Keywords: 0/90]n; composite; doi; energy; impact; impact energy; k n; reinforcement; strength; ±45]n
• Studies on influence of seashell-based filler on water absorption behaviour of bamboo-epoxy composite: mechanical and fractured surface characterization by Madhusudhana, H. K.; Imran, Khalid; Sushma, M. S.; Anand, K. J.; Ashoka, E.; Dhummansure, Vishalkumar (2025) - Motivated by these observations, this study aims to propose a remedial strategy for reducing moisture uptake in bamboo fiber composites by introducing seashell biofiller into the epoxy matrix. The primary objective of this work is to evaluate the moisture absorption behavior of bamboo fiber composites under water immersion and explore the potential of seashell waste-derived bio-fillers' effect on moisture resistance and mechanical properties. Keywords: absorption; bamboo; bamboo composites; clamshell; composites; doi; epoxy; fiber; filler; moisture; properties; strength; tensile; uptake; water

• Numerical implementation of a multiaxial cyclic plasticity model for the Local Strain Method in low cycle fatigue by Madrigal, C.; Chaves, V.; Navarro, A. (2014) - In previous work [4–8], we developed a plasticity model to simulate the behaviour of materials under multiaxial loads from cyclic stress-strain curves obtained in uniaxial loading tests with a view to extending the applicability of the Local Strain Method to multiaxial loading. Thus, Matlab was used to implement the particular equations for combined axial–torsional loads, which accurately reflect the behaviour of a material under multiaxial loads and considerably simplify the model equations. Keywords: increment; loading; stress
• Static and modal numerical analyses for the roof structure of a railway freight refrigerated car by Sepe, Raffaele; Pozzi, Angela (2015) - Full width/full-length, half-width/full-length and half-width/half-length modeling approaches can be used to determine static and fatigue behaviours of railway vehicles depending or not on the symmetry of roof structure, loads and on particularity of phenomenon. In the first stage the initial concept design of roof structure was analyzed and the structural weaknesses of designs were determined. Keywords: car; freight; loading; railway; roof; static; stress; structure
• Damage evolution in freeze cast metal/ceramic composites exhibiting lamellar microstructures by Simpson, C.; Withers, P.J.; Lowe, T.; Roy, S.; Wanner, A. (2015) - The white circles correspond to the development of an interfacial crack, the red circles highlight the formation and growth of a series of intra-lamellae cracks and the blue arrows indicate cracking in the metal matrix. The tracked interfacial damage also began to interact with other cracks, notably merging with intra-lamellae cracks and propagating across ceramic lamellae with greater frequency. Keywords: ceramic; cracks; damage; fig; interface; lamellae; loading; metal
• Crack initiation at V-notch tip subjected to in-plane mixed mode loading: An application of the fictitious notch rounding concept by Berto, F. (2015) - Figure 1: Fictitious notch rounding concept applied to mixed mode loading (mode 1+2): real root hole notch with stress averaged over * in direction of crack propagation (a) and substitute root hole notch with fictitious notch radius f producing max = (b). [23] Radaj, D., Zhang, S., On the relations between notch stress and crack stress intensity in plane shear and mixed mode loading, Eng. Keywords: loading; mode; notch; notches; stress
• Acoustic emission characteristics of instability process of a rock plate under concentrated loading by Wang, S.R.; Li, C.Y.; Zou, Z.S.; Liu, X.L. (2016) - Based on the locations of AE events, X.D. Zhao, et al. found that the AE distribution could reflect the shape and development of S S.R. Then we can analyze the evolution characteristics of temporal and spatial of AE events, which may facilitate the understanding of the mechanical properties and failure laws of rocks. Keywords: cells; characteristics; doi; events; failure; loading; plate; rock; rock plate; stage; test
• Acoustic emissions and pressure stimulated currents experimental techniques used to verify Kaiser effect during compression tests of Dionysos marble by Stavrakas, Ilias (2017) - The collected AE and PSC data are studied in combination with the mechanical data, like mechanical stress and strain, under the frame of the Kaiser effect. INTRODUCTION he scientific literature reports several studies and recordings of AE that are attributed to mechanical stresses adequate to cause microcracking phenomena in rocks [1]. Keywords: behaviour; effect; emissions; kaiser; loading; marble; psc; stress
• Parametric study of the deformation of transversely isotropic discs under diametral compression by Markides, Christos F.; Kourkoulis, Stavros K. (2017) - A relatively wide interval of ωo-values was studied, ranging from a very small one equal to ωo=2o (which in fact approaches the diametral compression by a pair of “point” forces, or equivalently to compression of very stiff discs which are not significantly deformed at the disc-jaw interface) to a rather very high one equal to ωo=30o (which corresponds to diametral compression of discs with extremely low stiffness). [16, 28] to 20o or even 30o (for discs of low stiffness made, for example, of shell-stones) Keywords: anisotropy; disc; displacement; isotropic; loading; markides; materials; transtropic
• A simple model to calculate the microstructure evolution in a NiTi SMA by Di Cocco, Vittorio; Natali, Stefano (2018) - Shape memory alloys (SMAs) are a wide class of materials characterized by the property to recover the initial shape. Shape memory alloy; Austenite; Martensite; Microstructure transitions. Keywords: austenite; cocco; conditions; cycle; fig; loading; martensite; microstructure; unloading
• Recent developments in multi-parametric three-dimensional stress field representation in plates weakened by cracks and notches by Lazzarin, P.; Zappalorto, M.; Berto, F. (2013) - This allows to explain an important feature of three-dimensional stress distributions in plates: far applied loads resulting in local skew-symmetric function (mode II stress components) inherently provoke a local skew- symmetric w function (mode III stress components). Figure 7 reports the induced in plane shear stress component xy for different plate thicknesses (h=2.5, 10 and 40 mm). Keywords: lazzarin; loading; mode; notch; plane; plates; problem; stress; thickness
• Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing by Araújo, Hugo; Leite, Marco; Ribeiro, AMR; Deus, Augusto M; Reis, Luis; Vaz, M Fatima (2019) - The aim of this work is to evaluate the mechanical properties and failure analysis of cellular core structures with different geometries that were obtained by additive manufacturing. Araújo, H., Leite, M., Ribeiro A.M.R,., Deus, A.M, Reis, L., Vaz, M.F., The Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing, Frattura ed Integrità Strutturale, 49 (2019) 478-486. Keywords: cellular; core; doi; failure; honeycomb; load; loading; lotus; panels; plateau; sandwich; structures
• Finite Element Analysis of the thermo-Mechanical Behavior of composite Pipe Elbows under Bending and Pressure loading by Abdelouahed, Elamine; Mokhtari, M.; Benzaama, H. (2019) - CONCLUSION his work has well presented the effectiveness of the damage criterion under complex geometric and loading conditions and in composite structures of a tubular model connected by elbow in the middle. Research on the combined influence of internal pressure and bending in composite tubular structures has found its way through the work of Natuski et al Keywords: bending; case; composite; damage; defect; effect; elbow; failure; loading; moment; pressure; structure
• Using a Hashin Criteria to predict the Damage of composite notched plate under traction and torsion behavior by Larbi Chaht, Fouzia; Mokhtari, Mohamed; Benzaama, Habib (2019) - T http://www.gruppofrattura.it/VA/50/2520.mp4 F. Larbi Chaht et alii, Frattura ed Integrità Strutturale, 50 (2019) 331-341; DOI: 10.3221/IGF-ESIS.50.28 332 Several researchers have studied the effect of the stacking sequence on the behavior of composite structures such as Mokhtari [6] and the use of stratified composite with change in ply thicknesses Mokhtari [7]. This approach, which can practically be difficult to achieve, is approved by the numerical results and can also be a solution to other problems in composite structures. Keywords: composite; damage; failure; fiber; figure; loading; modification; notch; resistance; structure; thickness
• The influence of plastic flow localization on the surface morphology of aluminum alloy specimens subjected to complex loading by Chechulina, Evgeniia; Oborin, Vladimir Alexandrovich; Gribov, Dmitriy Sergeevich (2024) - EXPERIMENTAL METHODS AND RESULTS n real technological processes, the material experiences complex loading at the macro level; despite this, in order to study PLC, in the overwhelming majority of studies experiments are carried out on uniaxial loading on solid flat or cylindrical specimens, therefore, to study the influence of the nature of surface layers deformation on the quality of parts (articles) surface, cylindrical tubular specimens were chosen, for which it is possible to conduct complex loading tests. A more detailed description of the methodology for experimental studying the mechanisms of initiation and propagation of deformation bands of localized plastic flow, determining the boundaries of discontinuous plastic deformation of the Al-6% Mg alloy under complex loading conditions are presented in [16]. Keywords: bands; chechulina; complex; deformation; doi; effect; exponent; fig; hurst; loading; profile; roughness; shear; specimen; surface; tension
• Application of perforated PEEK framework for improving strength of a bases of removable complete denture for maxilla by Akhmedov, Kamalutdin; Arutyunov, Dmitry; Lomakin, Mikhail; Bochkareva, Svetlana; Panov, Iliya; Panin, Sergey; Mustafaev, Magomet; Mustafaeva, Sofiat (2025) - [33] Removable plate denture with reinforced base: Pat. 2791989 RF / Arutyunov S.D., Dibirov T.M., Nersesov G.S., Stepanov A.G., Bagdasaryan G.G., Ordyan G.A., Grachev D.I. ; application 02/03/2022; publ. Microsoft Word - numero_72_art_20_5371.docx K. Akhmedov et alii, Fracture and Structural Integrity, 72 (2025) 280-294; DOI: 10.3221/IGF-ESIS.72.20 280 Application of perforated PEEK framework for improving strength of a bases of removable complete denture for maxilla Kamalutdin Akhmedov, Dmitry Arutyunov, Mikhail Lomakin Russian University of Medicine, 127006, Moscow, Russia kama05doc@gmail.com, http://orcid.org/0009-0000-5195-3942 dmitry.arutyunov@icloud.com, http://orcid.org/0009-0002-9325-2751 lomakin_mv@mail.ru, http://orcid.org/0000-0003-3739-6275 Svetlana Bochkareva, Iliya Panov, Sergey Panin Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS), 634055, Tomsk, Russia, svetlanab7@yandex.ru, http://orcid.org/0000-0003-4889-6128 panov.iliya@mail.ru, http://orcid.org/0000-0003-2321-7109 svp@ispms.ru, http://orcid.org/0000-0001-7623-7360 Magomet Mustafaev, Sofiat Mustafaeva Kabardino-Balkarian State University, 360004, Nalchik, Russia musmag@mail.ru, http://orcid.org/0000-0002-4042-9421 666238@mail.ru, http://orcid.org/0000-0003-2645-4089 KEYWORDS. Keywords: alveolar; base; conditions; doi; fig; framework; load; loading; peek; peek framework; rcd; stresses; support; teeth; tensile

• Failure of steam line causes determined by NDT testing in power and heating plants by Bulatovic, Srdjan; Aleksic, Vujadin; Milovic, Ljubica (2013) - Steam line; Failure; NDT testing. Failures of steam lines, other than direct material damage, could jeopardize the safety of personnel and equipment. Keywords: damage; integrity; life; line; microstructure; steam; testing
• Computed Tomography analysis of damage in composites subjected to impact loading by Crupi, V.; Epasto, G.; Guglielmino, E. (2013) - Composites; Low velocity impact; Computed Tomography; Impact damage; Collapse modes; Transportation engineering. Composite structures are more susceptible to impact damage than a similar metallic structure, because impacts create internal damages, that often are undetectable by a simple visual inspection and this is a great problem in the real structures. Keywords: aluminium; composites; core; damage; fig; foam; impact; sandwiches
• Characterization of mechanical damage in granite by Luong, Minh-Phong; Emami, Mehrdad (2013) - This paper aims to illustrate the use of infrared thermography as a non-destructive and non-contact technique to observe the phenomenological manifestation of damage in granite under unconfined compression. Within the framework of a consistent theoretical approach, this paper emphasizes the application and use of infrared thermography to detect and evaluate quantitatively the extent of damage in brittle geomaterials owing to the non-linear coupled thermomechanical effects. Keywords: damage; failure; luong; rock; specimen; temperature; thermography
• Damage localization and rupture with gradient damage models by Pham, K.; Marigo, J.-J. (2011) - Inserting in (8) = t and = tv u w with 0w  , we obtain the variational formulation of the equilibrium of the bar, 00 ( ( )) ( ) ( ) = 0,     L t tE x u x w x dx w  (9) From (9), we deduce that the stress along the bar is homogeneous and is only a function of time = 0, = ( ( )) ( ), (0, )     t t t tE x u x x L (10) ( ( )) ( )         t L L e s s s s s st S x dx S x x dx ds 2 0 0 0 = ( ) ( ( )) ( ) 2       t t Keywords: bar; damage; localization; zone
• A data fusion based approach for damage detection in linear systems by Grande, Ernesto; Imbimbo, Maura (2014) - 1 2 1 1 1 2 2 1 ( ) ( ) ( ) 1 S S S m S m S m S Q       (5) where Q represents a measure of the degree of conflict between the two sources defined as: 1 2 1 1 2 2( ) ( ) S S Q m S m S     (6) DF AND MDF PROPOSED TECHNIQUES FOR DAMAGE DETECTION he approaches presented in this paper for damage identification of linear systems are developed by combining the use of classical damage indicators based on the modal strain energy through the Modal Strain Energy Change Ratio index (MSECR) and on the flexibility matrix through the relative damage indicator (rdi) with the Dempster- Shafer data fusion theory. Damage Identification; Modal Strain Energy; Flexibility Matrix; Data-Fusion INTRODUCTION umerous studies concerning the development of damage indicators mainly based on the modal parameters of systems derived from identification processes, in some cases combined with finite-element model update algorithms, are available in the current literature Keywords: damage; datafusion; elements; index; m s; mdf
• Evaluation of the material’s damage in gas turbine rotors by instrumented spherical indentation by Nappini, D.; Zonfrillo, G.; Mastromatteo, F.; Giovannetti, I. (2014) - Conventional hardness measurements were also carried out in order to find a relationship between these tests and indentations parameters. Indentation tests can be used to probe hardness of materials, toughness, elastic modulus, elasto-plastic behaviour and constitutive laws evaluation by different reverse analysis methods of indentation load-displacement curve [10-16]. Keywords: analysis; damage; depth; indentation; load; material; parameters; stress; temperature
• Damage initiation in brittle and ductile materials as revealed from a fractoluminescence study by Chmel, Alexandre; Shcherbakov, Igor’ (2014) - The statistical analysis of the FL time series emitted from impact damaged solids revealed the power law energy release distributions (scaling) in brittle materials, and exponential (Poisson- like) distributions in ductile materials. One can see that the distributions belonging to brittle materials contain log-linear portions (Fig. 3a), which represent the dependence: log10N(E>E)  – b log10E (1) (here b is the constant). Keywords: damage; energy; materials; series; time
• Sn and Ti influences on intermetallic phases damage in hot dip galvanizing by Di Cocco, V. (2012) - The presence of Sn doesn’t change intermetallic phases characteristic in traditional Zn coatings, but the presence of Ti leads to the presence of an outer zone, formed by a double phases ductile matrix and a brittle dispersed phase. In the last years, there has been an increase in zinc coatings research, focusing both on coating procedures and on mechanical behavior characterization, in order to optimize Zn layer thickness and mechanical performances [5]. Keywords: bath; coatings; damage; phases
• Plasma-sprayed thermal barrier coatings: numerical study on damage localization and evolution by Slámecka, K.; Skalka, P.; Celko, L.; Pokluda, J.; Saucedo-Mora, L.; Marrow, T. J.; Thandavamoorthy, U. (2015) - Waviness 4.8/3.8 6.1/5.0 1.01/1.00 Table 1: Comparison of the topographical parameters obtained for the as-sprayed CoNiCrAlY bond coat and YSZ top coat. Nowadays, it is agreed that a certain level of bond coat roughness is needed, as top coat bonding is provided primarily via mechanical interlocking, but that too rough coatings would fail prematurely. Keywords: barrier; bond; coat; coatings; damage; doi; layer; roughness; stresses; temperature; tgo
• Residual life prediction of defected Polypropylene Random copolymer pipes (PPR) by Ouardi, Abderazzak; Majid, Fatima; Mouhib, Nadia; Elghorba, Mohamed (2017) - For low life fractions (0% <β<16%), experimental damage and unified theory damage at a loading level γ = 1.27 are similar. In stage III curves of static damage and unified theory damage for γ = 1.9 return back similar. Keywords: damage; fraction; hdpe; life; majid; pipes; ppr; pressure; reliability
• The healing of damage after the plastic deformation of metals by Smirnov, S.V. (2013) - This approach allowed some simple applied problems to be solved, but hampered the study of the general rules of metal damage under the complex stress-strain state. In mechanics, the progress in the development of the notion of metal damage under plastic deformation is connected with the appearance of kinetic theories of dispersed fracture (damage mechanics) Keywords: annealing; damage; deformation; healing; metal; micro; plastic
• Damage detection in a reinforced concrete bridge applying wavelet transform in experimental and numerical data by silva, ramon saleno yure rubim costa; Palechor, Erwin U. L.; Bezerra, Luciano M.; de Morais, Marcus V. G.; da Silva, Welington V. (2019) - Such methods rely on the fact that dynamic characteristics, such as natural frequencies, mode shapes and damping are influenced by the stiffness of the structure [1] (see, for example, detailed studies on damage detection methods based on structural vibrations [2, 3]). Damage detection methods in bridges trough vibration monitoring: evaluation and application. Keywords: bridge; damage; data; detection; methodology; mode; numerical; shapes; silva; wavelet
• Prediction of Cycle Life of Expansion Bellows for Fixed Tube sheet Heat Exchanger by adel, CHouiter; D. Benzerga, D.; Haddi, A.; Tamine, T. (2018) - T F A. Chouiter et alii, Frattura ed Integrità Strutturale, 47 (2019) 30-38; DOI: 10.3221/IGF-ESIS.47.03 37 Figure 7: Cycle life of expansion bellow. [7, 8] has experimentally and numerically analyzed the optimal parameters for the manufacture of metal expansion bellows. Keywords: bellows; damage; exchanger; expansion; method; pressure; shell; tube
• A quick-assessment procedure to evaluate the degree of conservation of rockfall drapery meshes by Marchelli, Maddalena; De Biagi, Valerio; Peila, Daniele (2018) - With this perspective, the present work aims to introduce an encoded expeditious procedure to evaluate the degree of degradation of drapery mesh systems, assessing their state of conservation. Simple wire mesh drapery systems (Fig. Keywords: anchors; connection; damage; doi; drapery; efficiency; elements; mesh; net; protection; rope; system
• Impact response of laminated cylindrical shells by Campos Pais Coelho, Carlos Alexandre; Navalho, Fábio V.P.; Reis, P.N.B. (2019) - Prediction of low velocity impact damage in carbon-epoxy laminates, Compos. Citation: Coelho, C.A.C.P., Navalho, F.V.P., Reis, P.N.B., Impact response of laminate cylindrical shells, Frattura ed Integrità Strutturale, 48 (2019) 411-418. Keywords: carbon; composite; damage; doi; fibres; glass; hybrid; impact; load; response; shells
• Low velocity failure and integrity assessment of foam core sandwich panels by Mocian, Oana Alexandra; Constantinescu, Dan Mihai; Sorohan, Stefan; Sandu, Marin (2019) - Microsoft Word - 2356 O. A. Mocian et alii, Frattura ed Integrità Strutturale, 48 (2019) 230-241; DOI: 10.3221/IGF-ESIS.48.24 230 Low velocity failure and integrity assessment of foam core sandwich panels Oana Alexandra Mocian, Dan Mihai Constantinescu, Ştefan Sorohan, Marin Sandu University POLITEHNICA of Bucharest, Department of Strength of Materials, 060042 Bucharest, Romania mocianoana@gmail.com, https://orcid.org/0000-0003-3093-7788 dan.constantinescu@upb.ro, https://orcid.org/0000-0001-5400-7804 stefan.sorohan@upb.ro, https://orcid.org/0000-0002-9400-5843 marin.sandu@upb.ro, https://orcid.org/0000-0002-9183-5104 ABSTRACT. This paper experimentally studies damage, failure and energy absorption properties of foam core sandwich panels with aluminum and glass fiber reinforced plastic (GFRP) facesheets subjected to low velocity impact. Keywords: aluminum; composite; core; damage; doi; energy; facesheets; foam; impact; panels; pur; sandwich; sandwich panels; type; velocity
• Damage identification in beams using additional rove mass and wavelet transform by Lopez Palechor, Erwin U.; Bezerra, Luciano M.; de Morais, Marcus Vinicius G.; Silva, Ramon S. Y. R. C.; Barros, Edenia N. (2019) - I E.U.L. Palechor et alii, Frattura ed Integrità Strutturale, 49 (2019) 614-629; DOI: 10.3221/IGF-ESIS.49.56 617 (a) Perspective view of damage positions – Case-1. (b) Lateral view of damages positions –Case-1. (a) Perspective view of damage positions –Case-2. (b) Lateral view of damages positions – Case-2. Keywords: beam; damage; doi; dwt; figure; frequency; identification; integrità; mass; nodes; palechor; signal; steel; strutturale; transform; wavelet
• Behavior and damage of a pipe in the presence of a corrosion defect depth of 10% of its thickness and highlighting the weaknesses of the ASME / B31G method by Berrekia, Habib; Benzerga, D.; Haddi, A. (2019) - Defect N0 Nr N0 Nr Defect-95 44 7143 440 71430 Defect-75 88 14286 880 142860 Defect-65 132 21429 1320 214290 Defect-60 154 25000 1540 250000 Defect-45 176 28572 1760 285720 Defect-30 198 32143 1980 321430 Defect-25 220 35715 2200 357150 Defect-20 242 39286 2420 392860 Defect-10 264 42858 2640 428580 Defect-5 286 46429 2860 464290 Table 4: Number of cycles according to corrosion defect. Inspection and evaluation of corrosion defects are carried out in accordance with ASME/31G method that is applied to low alloyed carbon steels with corrosion defects having soft profiles with low stress concentration. Keywords: corrosion; corrosion defect; damage; defect; depth; doi; figure; frattura; integrità; method; pipe; pressure; strutturale
• Prediction of thermomechanical behavior of acrylonitrile butadiene styrene using a newly developed nonlinear damage-reliability model by En-naji, Abderrazak; Mouhib, N.; Farid, H.; El Ghorba, M. (2019) - Regardless of the parameter used, the flow gradually increases from 0 (vitreous temperature material) to its critical value of 1. Tg : glass temperature Keywords: abs; behavior; damage; elongation; flow; fraction; life; material; modulus; properties; stress; temperature; ultimate; young; zone
• Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses by Masciotta, Maria Giovanna; Pellegrini, Daniele; Brigante, Daniele; Barontini, Alberto; Lourenço, Paulo B.; Girardi, Maria; Padovani, Cristina; Fabbrocino, Giovanni (2019) - This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, http://www.gruppofrattura.it/VA/51/2540.mp4 M.G. Masciotta et alii, Frattura ed Integrità Strutturale, 51 (2020) 423-441; DOI: 10.3221/IGF-ESIS.51.31 424 relevant aspects about the effects of settlement-induced cracks on the modal blueprints of masonry arches. However, the systematic use of masonry arches only started with the ancient Romans, who learned the arch from the Etruscans, refined it and tapped its full potential for above ground buildings and bridges, erecting arch structures throughout the empire Keywords: analysis; arch; arches; damage; doi; experimental; fig; m.g; mac; masciotta; masonry; modal; mode; numerical; shapes; structure; strutturale; support
• Restoring stone monuments: Enlightening critical details by the combined use of innovative sensing techniques by Pasiou, Ermioni (2019) - Mining of marble volumes from mount Pentelicon was forbidden. [28] in marble specimens under uniaxial com- pression and the critical point was determined at about 80% of the respective maximum stress, very close to the one obtained in the present study, although the specimens of the present study are complex (three materials exist, however marble is the one that is finally fractured) and the loading mode is different. Keywords: damage; displacement; group; load; marble; moving; pasiou; specimen; time; volume
• Differential Evolution Algorithm for Identification of Structural Damage in Steel Beams by Emidio Sobrinho, Brunno; Gomes, Gilberto; Vital da Silva, Welington; Silva, Ramon; U. L. Palechor, Erwin; M. Bezerra, Luciano (2020) - This attempt of damage identification analysis is already possible because the displacements obtained in the ANSYS© (2007) intact numerical analysis by means of the SHELL63 element have values lower than those obtained in the damaged analysis through the experimental model, demonstrating possibilities of coherence in the analysis. The element's damage values are in agreement with the proposed problem, even if at the beginning and end of damage analyses appeared some distortions probably due to not null displacements close to supports. Keywords: analyses; beam; damage; displacements; doi; element; experimental; fig; figure; identification; load; numerical; problem
• Multiple Crack Detection using Wavelet Transforms and Energy Signal Techniques by Akbari, Jalal; Ahmadifarid, Majid; Kazemi Amiri, Abbas (2020) - Wavelet transforms are efficient tools for structural health monitoring (SHM) and damage detection. Thus, signal energy analysis is used as an alternative technique for damage detection. Keywords: beams; conditions; damage; damage detection; detection; elements; energy; mode; shapes; signal; transforms; wavelet
• A Novel Method to Estimate the Damage Severity Using Spatial Wavelets and Local Regularity Algorithm by Reddy, Mallikarjuna; K, Arun Kumar (2020) - [10] Tested sensitivity of Haar and Gabor wavelet, Haar wavelet is best for beam damage detection. [1] showed how to utilize the dynamic characteristics in damage detection based on natural frequency method. Keywords: beam; damage; data; detection; exponent; fig; location; method; modal; mode; plot; transform; wavelet
• A coupled elastoplastic damage model for brittle rocks: elastoplastic damage model for brittle rocks by Li, Zheng; Shou, Yundong; Guo, Deping; Berto, Filippo (2020) - [32] Salar, M. R., Saeb, S., Willam, K. J., Patchet, J., Carrasco, R.C. (2004).A coupled elastoplastic damage model for geomaterials, Comput. Coupled elastoplastic damage model; Non-associated plastic flow rule; Anisotropic damage behaviors; Brittle Rock. Keywords: d d; damage; doi; plastic; rock
• Using XFEM to Predict the Damage with Temperature of the Steel Pipe Elbows under Bending and Pressure loading by Hammadi, Nourddine; Mokhtari, Moahmed; Benzaama, Habib; Madani, Kouider; Brakna, Abdelkader; Abdelouahed, Elamine (2020) - N. Hammadi et alii, Frattura ed Integrità Strutturale, 55 (2021) 345-359; DOI: 10.3221/IGF-ESIS.55.27 355 Figure 10: damage moment–rotation curve with effect of angular elbows in the case of pressure 30bar and temperature of 40°C under opening, closing and out-off plan flexion moment Figure 11: STRESS ANALYSIS he numerous stresses subjected to steel elbows as well as their typical geometry in tubular systems; make them an important and widely studied area of research. Keywords: bending; case; damage; doi; effect; elbow; moment; pressure; stress; structure
• Damage identification in steel plate using FRF and inverse analysis by Khatir , Samir ; Abdel Wahab , Magd ; Tiachacht, Samir ; Le Thanh , Cuong ; Capozucca, Roberto ; Magagnini, Erica ; Benaissa, Brahim (2021) - Element (Severity %) – 87 (20%) 37 (15%) Element (Severity %) – – 62 (20%) Element (Severity %) – – 78 (5%) Table 2: Damage case. (a) (b) (c) Figure 3: Damage case 2 – CCCC plate. Keywords: algorithm; aoa; case; damage; element; khatir; optimization; plate
• Combination of Intermittent Search Strategy and an Improve Particle Swarm Optimization algorithm (IPSO) for damage detection of steel frame by Le Thanh, Cuong; Sang-To, Thanh; Hoang-Le , Hoang-Le; Danh, Tran-Thanh; Khatir, Samir; Wahab, Magd Abdel (2021) - Several functions (F1 to F7 and F11 to F13) show outstanding accuracy when using ES in combination with PSO or IPSO algorithm. The detail of effectiveness of the improvement is illustrated below, including evaluation, comparison between PSO, and PSO, IPSO combination with ES. Keywords: algorithm; damage; doi; ipso; optimization; pso; results
• RC beams damaged by cracking and strengthened with NSM CFRP/GFRP rods by Capozucca, Roberto ; Magagnini, Erica; Vecchietti, Maria Vittoria; Khatir, Samir (2021) - [19-22] and the assessment of strengthened RC beams with NSM FRP rods with non-destructive free vibration tests [23,24]. The knowledge about the use of Glass-FRP rod following the NSM to reinforce RC beams is limited. Keywords: beam; cfrp; damage; frequency; gfrp; nsm; rods; tests
• Residual Force Method for damage identification in a laminated composite plate with different boundary conditions by Behtani, Amar; Tiachacht, Samir; Khatir, Tawfiq; Khatir, Samir; Abdel Wahab, Magd; Benaissa, Brahim (2021) - Microsoft Word - numero_59_art_03_3255.docx A. Behtani et alii, Frattura ed Integrità Strutturale, 59 (2022) 35-48; DOI: 10.3221/IGF-ESIS.59.03 35 Focussed on Steels and Composites for Engineering Structures Residual Force Method for damage identification in a laminated composite plate with different boundary conditions Amar Behtani, Samir Tiachacht Laboratory of Mechanics, Structure, and Energetics, Mouloud Mammeri University of Tizi-Ouzou, Algeria. The strongest point about damage identification based on the dynamic measurements, is the ability to perform structural health evaluation globally. Keywords: composite; damage; doi; noise
• Damage Detection in Structural Health Monitoring using Hybrid Convolution Neural Network and Recurrent Neural Network by Bui-Tien, Thanh; Bui-Ngoc, Dung; Nguyen-Tran, Hieu; Nguyen-Ngoc, Lan; Tran-Ngoc, Hoa; Tran-Viet, Hung (2021) - A convolution neural network is used to extract deep features while recurrent neural network is trained to learn the long-term historical dependency in time series data. However, in the 1D problem, although applying CNN can help to learn the inner characteristics of time series data, it is unable to put into consideration the correlation of different time series data measured. Keywords: accuracy; cnn; damage; data; detection; features; method; monitoring; network; neural; ngoc; structure; time
• The Application of PSO in Structural Damage Detection: An Analysis of the Previously Released Publications (2005–2020) by Ghannadi, Parsa; Kourehli, Seyed Sina; Mirjalili, Seyedali (2022) - Structural damage detection method using uncertain frequency response functions, Comput. Bridge damage identification by combining modal flexibility and PSO methods. Keywords: algorithm; damage; damage detection; eng; frequencies; function; ghannadi; identification; methods; modal; mode; objective; optimization; particle; problems; pso; results; review; step; structures; study; swarm; swarm optimization; updating
• Beam-like damage detection methodology using wavelet damage ratio and additional roving mass by C. Santos, Juliana; V. G. de Morais, Marcus; R. Machado, Marcela; Silva, Ramon; U. L. Palechor, Erwin; V. Silva, Welington (2022) - Damages were simulated like a mass discontinuity (mass damage). Figs. 8 and 9 present WDR for first and second natural frequency of free-free and simply supported beams, respectively, as a function of the ratio of damage mass and total mass /d Keywords: beam; damage; damage detection; detection; doi; frequency; identification; mass; shift; structures; wavelet
• Damage identification in RC bridges by confronting two approaches: visual inspection and numerical analysis by Ayad, Mohammed; Boumechra, Nadir; Hamdaoui, Karim (2023) - In the following section, the three damage detection methods, namely the frequency change method, the CO-MAC method, and damage indicator method, are used to assess and locate the damage existing on the structure. Recently, several methods for damage detection in bridges have been developed; some of them are more effective than others [2, 3]. Keywords: beam; bridge; change; damage; detection; doi; elements; figure; method; structure; strutturale
• Delamination effect on the mechanical behavior of 3D printed polymers by Majid, Fatima; Hachimi, T.; Rhanim, H.; Rhanim, R. (2022) - This study investigates the correlation between layer thickness and mechanical properties of additively manufactured parts using FDM. (2), energy damage, compared to the Miner one, are represented in the curve of Fig. Keywords: abs; damage; doi; energy; layers; samples; specimens; stress; tensile; thickness
• Evaluating the Safety and the Effect of Blast Loading on the Shotcrete together with lattice girder Support of Tunnels by Basaligheh, Farnoosh; Tabar, Hamidreza Karimi; Nikkhah, Majid (2023) - Blasting was modeled thoroughly on a full scale and simulations were conducted for rock media, tunnel structure, explosive, stemming, and air inside the tunnel. The effects of explosion vibration of subway tunnel on the gas pipeline in different tunnel explosion conditions were calculated and the dynamic response characteristics of soil, pipe, and surrounding soil were discussed. Keywords: blasting; damage; doi; explosion; modeling; numerical; point; results; rock; structure; support; tunnel; velocity
• Fracture analysis of defect Chlorinated Poly Vinyl Chloride pipes based on burst pressure and prediction their fraction of life by Gugouch, Fatima; Wahid, Achraf; Bassir, Youssef; Elghorba, Mohamed (2023) - We performed a serie of burst tests on virgin and artificially damaged CPVC pipe at different notch lengths, and then submitted the specimens to burst pressure tests, in addition to recording the pressure and time during these tests to be used in the completion of the study. Our main objective is to study pipes damage in order to predict the service life in favor of a strategy for optimizing the predictive maintenance of a hydraulic network built in CPVC and to find out the optimum moment to remove the structure without attending until fracture not changing the pipe healthy based only on simple tensile and burst tests, without resorting to expensive and time-consuming cyclic tests. Keywords: burst; cpvc; damage; doi; fraction; life; pipes; pressure; reliability
• Damage and restoration of historical urban walls: literature review and case of studies by Sassu, Mauro; Puppio, Mario Lucio; Safabakhsh, Aida (2023) - Moisture and thermal performance of masonry walls were evaluated, taking into account internal moisture-producing ratio, external climate situations and modeling software tool. Furthermore, stiffness, energy-dissipation capability and bearing capacity of the structure decreases and the lateral displacement of masonry wall gradually increases. Keywords: analysis; case; climate; collapse; damage; doi; figure; heritage; italy; masonry; materials; moisture; puppio; structure; walls; water
• Study of defects influence on chlorinated polyvinyl chloride pipes damage and analysis of their fracture by Gugouch, Fatima; Meknassi, M.; Elghorba, M.; Wahid, A.; Mouradi, H.; Bouhssis, H.; Maziri, A. (2023) - Microsoft Word - numero_67_art_14_4447.docx F. Gugouch et alii, Frattura ed Integrità Strutturale, 67 (2024) 192-204; DOI: 10.3221/IGF-ESIS.67.14 192 Study of defects influence on chlorinated polyvinyl chloride pipes damage and analysis of their fracture Fatima Gugouch, Meriem Meknassi, Mohamed Elghorba LCCMMS, ENSEM (Electricity and Mechanics National Superior School), University of Hassan II, Casablanca, Morocco Fatima.gugouch.f@ensem.ac.ma, meryammeknassi@gmail.com, medelghorba20@gmail.com Achraf Wahid Engineering Science and Application Laboratory (LSIA), National School of Applied Sciences of Alhoceima, University Abdlmalk Essadi-Tetouan, Tétouan 93000, Morocco achraf.wahid90@gmail.com Houda Mouradi Laboratory of Mechanical Engineering, Science and Technology Faculty, Sidi Mohammed Ben Abdellah University, Fez, Morocco Houda.mouradi@gmail.com Bouhsiss Hassan Laboratory of Condensed Matter Physics, Sciences Faculty Ben M’Sik, University of Hassan II, Casablanca, Morocco h.bouhsiss@gmail.com Aziz Maziri Applied Research Team on Composites, Management and Innovation, High National School of Electricity and Mechanics, Hassan II University, Casablanca, Morocco a.maziri@ensem.ac.ma KEYWORDS: CPVC pipes, Burst tests, Pressure, Unified theory, Fracture, Damage. The main industrial applications for CPVC pipes include gas, water, and sewage piping systems, as well as other industrial uses including the transportation of minerals. Keywords: burst; cpvc; damage; depth; doi; failure; gugouch; material; pipes; pressure
• Experimental and Numerical Study on Vibration-Based Damage Detection and Localization in Laminated Composite Plates by Saeesh Verenkar; Sridhar, I.; Uppin, Vinayak S.; Shivakumar Gouda, P. S. (2023) - Notably, comprehensive literature reviews on damage detection and SHM based on modal parameters have been conducted and summarized [1,2,3,4]. C https://youtu.be/3o2HfBx2ueY S. Verenkar et alii, Frattura ed Integrità Strutturale, 67 (2024) 163-175; DOI: 10.3221/IGF-ESIS.67.12 164 Natural frequencies and mode shapes are frequently used as modal parameters in damage detection due to their sensitivity to variations in the structural stiffness resulting from damage Keywords: analysis; damage; delamination; detection; doi; modal; mode; plate; shapes
• Introduction and application of a drive-by damage detection methodology for bridges using variational mode decomposition by Shandiz, Shahrooz Khalkhali; Khezrzadeh, Hamed; Azam, Saeed Eftekhar (2024) - In an effort to use EMD in bridge damage detection, the work by E.J. Obrien et al. By examining two indications of vehicle acceleration spectrum and change in bridge displacement, a novel technique of bridge damage detection was developed [43]. Keywords: b b; beam; bridge; c b; c c; c k; damage; doi; imf; k b; k k; method; t t; vehicle; vmd
• Correlation coefficients of vibration signals and machine learning algorithm for structural damage assessment in beams under moving load by Pham Bao, Toan; Le-Ngoc, Vien (2024) - Beam damage detection under a moving load using random decrement technique and Savitzky–Golay filter. Excitation of heavy vehicles, in particular, can cause significant stresses and strains, which can lead to cracks, B https://youtu.be/1X8albuh9Rc T. Pham-Bao et alii, Frattura ed Integrità Strutturale, 70 (2024) 55-70; DOI: 10.3221/IGF-ESIS.70.03 56 deformations, and other forms of structural damage. Keywords: bao; beam; correlation; damage; data; learning; machine; r r; signal; vibration
• An interface-based microscopic model for the failure analysis of masonry structures reinforced with timber retrofit solutions by Greco, Fabrizio; Leonetti, Lorenzo; Lonetti, Paolo; Nevone Blasi, Paolo; Pascuzzo, Arturo; Porco, Giacinto (2024) - can be realized through chemical or mechanical anchors at the interior side of masonry walls. Micromodels for the in-plane failure analysis of masonry walls: Limit Analysis, FEM and FEM/DEM approaches, Frattura Ed Integrità Strutturale, 14(51), pp. Keywords: behavior; damage; doi; elements; failure; fig; frame; interface; masonry; masonry wall; numerical; retrofitting; structures; system; timber; wall
• Residual stresses caused by static and dynamic contact interaction of composite plate and steel spherical indenter by Eleonsky, Sviatoslav; Pisarev, Vladimir (2024) - Experimental data provide a determination of residual stress component values by the unequivocally solution of the properly posed inverse problem. This fact means that that the determination of residual stress components, referred to the middle plane of thin orthotropic plates, can rely on the approach described in works [23, 24]:            Keywords: components; composite; contact; damage; dimple; doi; drilling; fig; fringe; hole; impact; interference; patterns; point; principal; stress
• Damage mechanisms in hybrid composites: experimental characterisation and energy-based numerical analysis by Parente, João; Ferreira, Luis Miguel; Reis, Paulo N.B. (2025) - This model uses the maximum stress failure criterion to identify the onset of fibre damage. - Composites with a higher proportion of internal layers exhibited less damage propagation, whereas increasing the number of glass fibre layers led to lower intralaminar damage before reaching the peak force, compared to configurations with more carbon fibre content. Keywords: carbon; composites; damage; displacement; doi; fibre; force; glass; hybrid; lamina; laminates; layers; max

• Impact response of balsa core sandwiches by Mortas, Nurdane; N.B. Reis, Paulo; A.M. Ferreira, José (2014) - [10] Hosur, M.V., Mohammed, A.A., Zainuddin, S., Jeelani, S., Processing of nanoclay filled sandwich composites and their response to low velocity impact loading, Compos. [18] Ferreira, J.A.M., Reis, P.N.B., Costa, J.D.M., Richardson, M.O.W., Fatigue behavior of Kevlar composites with nanoclay filled epoxy resin, J. Compos. Keywords: composites; epoxy; impact; load; nanoclays; resin
• Indentation response of a NiTi shape memory alloy: modeling and experiments by Maletta, C.; Furgiuele, F.; Sgambitterra, E.; Callisti, M.; Mellor, B. G.; Wood, R. J. K. (2012) - Indentation tests have been carried out at room temperature using a spherical diamond tip and indentation loads in the range 50-500 mN in order to promote a large stress-induced transformation zone in the indentation region and, consequently, to avoid local effects due to microstructural variations. It is worth noting that good repeatability of the P-δ curves was observed, especially at higher values of indentation load; this results from an optimal choice of the test parameters. Keywords: alloy; depth; indentation; load; material; response; stress; temperature; transformation
• A numerical study on the structural integrity of self-anchored cable-stayed suspension bridges by Lonetti, Paolo; Pascuzzo, Arturo (2016) - In order to reproduce the bridge kinematic correctly, additional relationships to define the connections between girder, pylon and cable system should be introduced. U r t N q t               (13) where , , C G Pq q q    are the vectors collecting the nodal degrees of freedom of the cable, girder and pylon respectively, , , C G PN N N    are the matrixes containing the displacement interpolation functions for cable element (C), girder (G) and pylons (P), r  is the local coordinate vector of the i-th finite element. Keywords: behavior; bridge; cable; doi; g p; girder; load; lonetti; material; self; span; suspension; system
• Comparison of behaviour of laterally loaded round and squared timber bolted joints by Lokaj, Antonín; Klajmonová, Kristýna (2016) - There have been made series of tests of round timber joints in different inclinations of the loading force and also the reference tests of squared timber joints to compare the behaviour of this type of joints. The reference tests of squared timber joints were also carried out [3]. Keywords: capacity; grain; joints; load; round; samples; timber
• Pre-failure indicators detected by Acoustic Emission: Alfas stone, cement-mortar and cement-paste specimens under 3-point bending by Kourkoulis, Stavros K.; Dakanali, Ioanna (2018) - In this direction, an experimental protocol is in progress, with Alfas stone specimens subjected to uniaxial compression (Fig.13a) Alfas stone, cement-mortar and cement-paste specimens under 3-point bending Stavros K. Kourkoulis, Ioanna Dakanali Laboratory of Testing and Materials, Department of Mechanics, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 157 73 Athens, Greece stakkour@central.ntua.gr, ioannadak@hotmail.com ABSTRACT. Keywords: alfas; cement; load; materials; paste; signals; specimens; stone; time
• Structural integrity assessment and rehabilitating of Hercilio Luz bridge by Carvalho, Hermes; Hallal Fakury, Ricardo; Leite Vilela, Paula Moura (2017) - H. Carvalho et alii, Frattura ed Integrità Strutturale, 42 (2017) 93-104; DOI: 10.3221/IGF-ESIS.42.11 98 Figure 11: Hardness test in main structural elements. Changes in steel structures The Hercilio Luz Bridge steel structures were the most affected by the time effect. Keywords: anchorage; bars; bridge; elements; eye; figure; load; span; steel; structure; truss
• Mechanical and nanomechanical properties of MWCNT/PP nanocomposite by Tserpes, Konstantinos; Chanteli, A.; Pantelakis, Sp.; Koumoulos, E.P.; Charitidis, C.A. (2018) - For the specimens with mechanical properties lower than the average values, the SEM and SPM images revealed poor dispersion and formation of large agglomerates. MWCNT/PP 2 wt%_02 2092.1 43.36 MWCNT/PP 2 wt%_03 2057.3 43.41 MWCNT/PP 2 wt%_04 2007.8 36.43 MWCNT/PP 2 wt%_05 2086.8 36.94 MWCNT/PP 2 wt%_06 1719.2 37.57 MWCNT/PP 5 wt%_01 2175.3 44.61 2055.22 (121.82) 42.06 (2.06) MWCNT/PP 5 wt%_02 1965.8 40.54 MWCNT/PP 5 wt%_03 1912.4 40.49 MWCNT/PP 5 wt%_04 2182.9 43.38 MWCNT/PP 5 wt%_05 2039.7 43.68 MWCNT/PP 5 wt%_06 2075.22 39.68 Table 1: Measured mechanical properties of the PP and nanocomposite. Keywords: carbon; cnts; displacement; doi; load; modulus; mwcnt; nanoindentation; properties; specimen; tests
• Experimental characterization and numerical modelling analyses of nano-adhesive-bonded joints by Hadjez, Fayssal; Necib, Brahim (2018) - A model for brittle failure in adhesive lap joints of arbitrary joint Configuration, Composites structures, 2015, pp. Many studies of bonded lap joints for aerospace applications have been performed to improve our understanding of the mechanical properties of the joints Keywords: adhesive; bonded; displacement; epoxy; failure; fig; joints; lap; load; resin; samples
• Management of multi-source information to identify the typology of the horizontal structures in historical masonry buildings: the case study of the Museum of Capodimonte in Naples (Italy) by Maione, Alessandra; Argiento, Luca Umberto; Casapulla, Claudia; Prota, Andrea (2018) - Lastly, a third hypothesis assumes that the present visible vaults are structural masonry vaults but their fourth side, corresponding to the thin wall, is carried out by a concrete curb. In particular, the application of the infrared thermography led to a first distinction between structural masonry vaults and no-load-bearing vaults. Keywords: approach; bearing; buildings; doi; fig; infrared; load; masonry; museum; rooms; structures; vault
• Monotonic and Fracture Behaviours of Bolted Connections with Distinct Bolt Preloads and Surface Treatments by Gomes, Vítor M.G.; Rodrigues, Mariana; Correia, José A.F.O.; Figueiredo, Miguel A.V.; de Jesus, Abílio M.P.; Fernandes, António A. (2019) - Experimental details description Monotonic static tests were performed on double-shear bolted butt joints to evaluate the influence of the connection geometry, bolt preloads, surface treatments, and the plate thickness effects in the mechanical strength and failure modes. A complete study of bearing stress in single bolt connections, J. Constr. Keywords: bolts; connections; contact; doi; failure; friction; joints; load; numerical; slip; specimens; static; steel; tests; zinc
• The Effects of Ply Orientation on Nonlinear Buckling of Aircraft composite Stiffened Panel by Mouhat, Ouadia; Bybi, Abdelmajid; El Bouhmidi, Ahmed; Rougui, Mohamed (2019) - This research emphasizes the buckling analysis of stiffened composite panels using the nonlinear, finite element modelling. Stiffened composite panels; Nonlinear buckling analysis; FEM ply orientations. Keywords: analysis; buckling; composite; doi; linear; load; panel; skin;  ;  
• NURBS-based kinematic limit analysis of FRP-reinforced masonry walls with out-of-plane loading by Chiozzi, Andrea; Grillanda, Nicola; Milani, Gabriele; Tralli, Antonio (2019) - RIGID ELEMENTS DISCRETIZATION ny arbitrary FRP reinforced masonry wall with openings, can be modeled as a set of NURBS surfaces within any commercial 3D modeling environment. Moreover, a number of studies in the literature proved that limit analysis is still capable of reliably assess FRP reinforced masonry structures, see e.g. [48,49]. Keywords: analysis; approach; chiozzi; collapse; doi; fig; frp; limit; load; masonry; nurbs; parameters; plane; space; walls
• An experimental study on restoration technique for the Acropolis of Athens: developing the experimental set-up for pull-out testing of titanium bars embedded in marble blocks by Dakanali, Ioanna; Marinelli, Aikaterini (2019) - Microsoft Word - numero_50_art_31_2606 I. Dakanali et alii, Frattura ed Integrità Strutturale, 50 (2019) 370-382; DOI: 10.3221/IGF-ESIS.50.31 370 Focused on the research activities of the Greek Society of Experimental Mechanics of Materials An experimental study on restoration technique for the Acropolis of Athens: developing the experimental set-up for pull-out testing of titanium bars embedded in marble blocks Ioanna Dakanali Laboratory of Testing and Materials, Department of Mechanics, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15773 Athens, Greece dakanalioanna@gmail.com Aikaterini Marinelli School of Engineering and the Built Environment, Edinburgh Napier University, Merchiston Campus, EH10 5DT Τhis work aims at investigating the mechanisms activated during the ex- traction of titanium bars from a marble volume (pull-out phenomenon), used for re- joining fragmented marble structural members at the monuments of the Acropolis of Athens. Keywords: 2nd; bar; bars; class; doi; load; lvdt; marble; paste; pull; test; time
• Optimization design based approach for the determination and minimization of the displacement under tensile load in hybrid composite joint by Abderahmane, Sahli; Merabbi, Fouzia; Lousdad, Abdelkader; Megueni, Abdelkader (2020) - Fig. 4 illustrates the role and process of bolt transfer load. Hybrid composite joint; Composite structure; adhesive; Genetic Algorithm; Optimization. Keywords: adhesive; assembly; bolts; composite; displacement; hybrid; joint; load; stress; substrates
• A biomechanical study of the role of sitagliptin on the bone characteristics of diabetic rats by Kourkoulis, Stavros K; Pasiou, Ermioni; Abdi, Arezoo; Perrea, Despoina; Vlamis, John (2019) - It was concluded that diabetic bones undertake larger forces despite the fact that the “diameter” of their cross- section was somehow smaller. On the contrary, the slope of the load-deflection curve (corresponding to a measure of the stiffness) of diabetic bones is slightly lower compared to the control bones. Keywords: animals; area; bending; bone; control; cross; diabetes; diabetic; doi; group; load; rats; section; sitagliptin
• Effect of different parameters controlling the flexural behavior of RC beams strengthened with NSM using nonlinear finite element analysis by Mostafa Reda, Ramy; Omar, Zeinab ; Sallam, Hossam ; S. E. Ahmad, Seleem (2020) - The parametric study include the effect of different parameters such as NSM bar number, NSM bar length, end inclination angle and end inclination leg length on the flexural behavior of strengthened beams. D ef le ct io n R at io , N u m /E xp Element Size, (mm) Loading Plate Support Beam Steel Reinforcement FRP bars (a) (b) R. M. Reda et al., Frattura ed Integrità Strutturale, 53 (2020) 106-123; DOI: 10.3221/IGF-ESIS.53.09 111 Parametric Study The Non-linear finite element models were extended to investigate the effect of various parameters on the flexural behavior of NSM FRP strengthened beams such as; NSM bar numbers, NSM bar length, end anchorage inclination angle and end anchorage inclination length. Keywords: anchorage; angle; bar length; bars; beams; effect; end; inclination; inclination angle; leg; leg length; load; nsm bar
• An Applicability of Vyalov’s equations to ice wall strength estimation by Kostina, Anastasiya; Zelnin, Maxim; Plekhov, Oleg; Panteleev, Ivan; Levin, Lev; Semin, Michail (2020) - A simple analytical relations are commonly used in engineering practice to calculate ice wall thickness. The most common methods for calculating of ice wall thickness are those proposed by Domke Keywords: clay; doi; eqn; ice; ice wall; load; results; sand; soil; thickness; wall; wall thickness
• Effect of Stiffener Characteristics on the Seismic Behavior and Fracture Tendency of Steel Shear Walls by Shallan , Osman ; Maaly, Hassan ; Elgiar, Mohammed ; Elsisi, Alaaeldin (2020) - EFFECT OF STIFFENER DIRECTION o show the effect of stiffener's direction on the seismic behavior, the results of the models SPW-HU, SPW-VU, SPW-CU, and SPW-DU will be compared and discussed deeply. The models SPW-HU, SPW-VU, SPW-CU had the same weight, while SPW-DU had higher weight than other models. Keywords: behavior; capacity; doi; fig; hu spw; load; spw; steel; stiffeners; walls
• The effect of surface texturing in the sliding surface on tribological characteristics of alloy steel under wet condition by Patil, Hiralal S.; Patel, D. C. (2021) - [9] Kovalchenko, A., Ajayi, O., Erdemir, A. (2011), Friction and wear behaviour of laser surface textured surface under lubricated initial point contact”, Wear, 271, pp. Then after textured surfaces were investigated by using optimized ISO-68 lubricant. Keywords: effect; friction; load; micro; plate; steel; surface; texture; texturing; wear
• Impact response of different materials for sports mouthguards by Moreira, Maria ; Ramos, João Carlos; Messias, Ana ; Neto, Maria Augusta; Amaro, Ana Paula; Reis, Paulo NB (2021) - Possible mechanical improvements in hard layers or their inserts in mouthguards materials have also been studied. Impact energies of 1.72 J, 2.85 J and 4.40 J were applied, which correspond to impact velocities of 1 ms-1, 1.29 ms-1 and 1.61 ms-1, respectively. Keywords: doi; energy; erkoloc; eva; foils; impact; load; materials; mouthguards
• Dynamic strength analysis of the key components of the beam-type pumping unit with dynamic tracking balance by Wang, Bo (2021) - Variable speed drive optimization model and analysis of comprehensive performance of beam pumping unit. Design and implementation of a dual PWM frequency converter used in beam pumping unit for energy saving. Keywords: balance; beam; doi; load; pumping; pumping unit; rod; tracking; tracking balance; type; type pumping; unit
• Numerical investigation of the cold-formed I-beams bending strength with different web shapes by Kouider, Nadia; Hadidane, Yazid; Benzerara, Mohammed (2021) - According to numerical and analytical analysis, corrugated web beams perform better than all other sections. Corrugated web beams have been used for steel buildings and road bridges in Europe since the early 1960s and for road bridges in Europe and Japan since the 1980s Keywords: beam; bending; buckling; cold; doi; igf; integrità; load; sections; steel; trapezoidal; triangular; web
• The proposition of analytical expression HM–(√P/S) in microindentation pile-up deformation mode by Habibi, Samir; Semsoum , Djamel Zddine; Benaissa , Soufiane; Merzouk , Hassen (2022) - An empirical expression for the determination of Martens hardness as a function of indentation load, contact stiffness, and reduced modulus of elasticity by analyzing indentation load curves has been proposed for pile-up mode strain with the corrections imposed by the tip defect, the compliance of the instrument, and the axial axisymmetry coefficient of the Vickers indenter. Therefore, the ratio of indentation load to squared depth is not constant as mentioned by the authors Malzbender et al. Keywords: depth; doi; expression; hardness; indentation; load; mode; pile
• Flexural behavior of delta and bi-delta cold-formed steel beams: experimental investigation and numerical analysis by Hadidane, Yazid; Kouider, Nadia; Benzerara, Mohammed (2022) - Finally, the results obtained essentially showed that the failure modes of the delta and bi-delta beams corresponded to the buckling modes local. KEYWORDS. The cold-formed delta and bi-delta beams are class 4, these cross sections contain several roundings. Keywords: beams; bending; buckling; cold; delta; doi; flange; igf; integrità; load; numerical; section; steel
• A simplified formula to estimate the load history due to ballistic impacts with bullet splash. Development and validation for finite element simulation of 9x21mm full metal jacket bullets by Andreotti, Riccardo; Casaroli, Andrea; Quercia, Mauro; Boniardi, Marco V. (2022) - This paper presents a formula to estimate the resultant load history due to bullet splash interactions, based only on the geometry of the bullet, its mass distribution, and its initial impact velocity. The results demonstrate that the proposed method can be used to estimate the forces generated by bullet-splash phenomena of 9x21mm full metal jacket bullets and effectively applied to finite element simulations allowing significant reductions in computational cost. Keywords: andreotti; bullet; doi; history; impact; load; plate; simulations; stress; time
• Study on Micro-structure, Hardness and Optimization of Wear Characteristics of Al6061/TiB2/CeO2 Hotrolled MMCs using Taguchi Method by Sreenivasa Iyengar, S. R.; Sethuramu, D.; Ravikumar, M. (2023) - 3, it is clearly seen that, level-3 of reinforcement provides wt. % and level-1of sliding distance (m), applied load (N) at the optimal levels for achieving minimum wear loss of MMCs. Process parameters are highly significant and also it is observed that wt. % of reinforcements is a major influencing factor followed by the other process factors which are considered in this investigation. Keywords: ceo2; cof; composites; doi; hardness; hybrid; load; loss; matrix; mmcs; particles; sliding; tib2; wear
• Numerical Cohesive Zone Modeling (CZM) of Self-Anchoring AM Metal-CFRP joints by Altunok , Fikret Enes; De Pasquale, Giorgio (2024) - Figure 2: Metal side of the joint with different anchor geometries: 1) Plain, 2) Pyramid, 3) Reverse Spike, 4) Cylinder, 5) Cylinder Chamfered, 6) Block, 7) Rounded Block, 8) L-Block, 9) Edge Overhang, 10) THE COHESIVE ZONE MODELLING (CZM) n order to forecast the strength of joints with different anchor geometries, it is imperative to accurately simulate the joint failure mechanism. Keywords: adhesive; altunok; anchor; contact; czm; doi; failure; geometries; joint; load; separation; status
• Titanium/FRP hybrid sandwich: in-plane flexural behaviour of short beam specimens by Bellini, Costanzo; Borrelli, Rosario; Di Cocco, Vittorio; Franchitti, Stefania; Iacoviello, Francesco; Mocanu, Larisa Patricia; Sorrentino, Luca (2024) - Titanium lattice structures manufactured by EBM process: effect of skin material on bending characteristics, Eng. Failure energy and stiffness of titanium lattice specimens produced by electron beam melting process, Mater. Keywords: bellini; carbon; core; doi; lattice; load; process; skin; specimens; structures; titanium
• The influence of technological defects on the mechanical behavior of CFRP during buckling under compression based on DIC data and acoustic emission by Slovikov, Stanislav; Lobanov, Dmitry Sergeevich; Chebotareva, Ekaterina; Melnikova, Valeria (2024) - Consequently, the authors conducted tests on carbon fiber samples prepared from plates 2 mm thick. To meet the study's objectives, the following tasks were established: - Capturing buckling events through the Vic 3D system; - Analyzing acoustic emission signals during compression to identify the processes of composite layer separation (delamination) and fiber fracture. Keywords: buckling; composite; compression; defects; doi; fiber; frattura; integrità; load; samples; signals; strutturale
• Numerical analysis of 3D printed joint of wooden structures regarding mechanical and fatigue behaviour by Lehner, Petr; Pařenica, Přemysl; Juračka, David; Krejsa, Martin (2024) - Fatigue behavior 3D printed samples Because 3D printed materials exhibit different mechanical properties compared to conventionally processed materials, it is important to investigate also their fatigue life. Results from several loading schemes on two geometries with significantly different wood and 3D printed material interactions have been presented. Keywords: doi; limit; load; material; results; scheme; steel; stress; test; variant; wood
• Behavior of steel columns with double curvature: a numerical simulation and design-oriented parametric study by Guedaoura, Hamda; Benzerara, Mohammed; Gouider, Nadia; Hadidane, Yazid; Hadidane, Anfel Chaima (2025) - In order to identify key design parameters affecting the load capacity of double curvature hollow structural columns. Curved columns are no longer viewed merely as support elements but are now often used to convey motion, rhythm, and continuity within a space. Keywords: behavior; buckling; capacity; columns; curvature; curved; doi; failure; integrity; load; section; specimens; steel; stress
• Strengthening of steel I-Section girder web with depth discontinuity against localized buckling by Almasri, Amin; Akhtar, Mohammad Nadeem (2025) - To cover a gap in this topic, the current study will present a case study of a web local buckling failure of steel girders, and investigate web buckling behavior of steel girders with abrupt stepped depth under different conditions. The behavior of steel web elements under various loading conditions and material properties has been extensively studied. Keywords: analysis; beams; buckling; doi; element; flange; girder; load; section; steel; step; stress; web; web buckling

• The way the mistery of the Mattei’s case was solved by Firrao, D.; Ubertalli, G.; Matteis, P.; Pozzi, C. (2013) - e pressures imp n an object m eason a facto that, in the ca the material uated using th /(2(1+)) tresses in diff g values for t alloys, 0.44 fo e Pa] max in st steel (= [MP >12 50. reaching the Pressure wa o Milan Enri from landing ordering the M -stripped left ilots’ team, w ct location of e aircraft had had been deli mpulse of Pu turale, 14 (2010) solved i C.so Duca degli ENI, was ab ue to a then amining of th all charge ex on and by th or mechanica e of either o so cause su e analysed. Keywords: alloys; charge; doi; fig; firrao; high; igf; mpa; shear; slip; steel; stress; twin; values; wave; sf
• An investigation on corrosion protection layers in pipelines transporting hydrocarbons by Bolzon, Gabriella; Gabetta, Giovanna; Molinas, Bernardo (2014) - These characteristics can be verified by means of indentation tests, which allow identifying the failure modes and calibrating the mechanical properties of materials. The mechanical response of the specimens was investigated by indentation tests, performed with rounded (Rockwell [7]) and sharp (Vickers [8]) tips at 100 N and 200 N maximum load in a Zwick/Roell ZHU 0,2 equipment. Keywords: corrosion; curves; fig; indentation; left; right; rockwell; steel
• Inter-laminar shear stress in hybrid CFRP/austenitic steel by Lopes, J.; Freitas, M.; Stefaniak, D.; Camanho, P.P. (2014) - T J. Lopes et alii, Frattura ed Integrità Strutturale, 31 (2015) 67-79; DOI: 10.3221/IGF-ESIS.31.06 74 For hybrid beams however a modified version of Eq. Figure 7: Plot of typical examples of Reference beam and Hybrid beam with vacuum blasting. Keywords: beam; cfrp; composite; elements; hybrid; ilss; numerical; reference; results; shear; specimens; steel; stress; treatment
• Wear surface damage of a Stainless Steel EN 3358 aeronautical component subjected to sliding by Felli, Ferdinando; Brotzu, Andrea; Vendittozzi, Cristian; Paolozzi, Antonio; Passeggio, Francesco (2012) - SEM OBSERVATION OF SUPERFICIAL DEFECTS he SEM observation of piston surface confirms what has been seen during the macroscopic examination. CONCLUSION t can be summarized that the failure can be ascribed both to the wear phenomena, coming from the not expected continuous contact between spheres and piston surface, and to incorrect evaluation of the transversal loads applied to the whole system. Keywords: locking; nipple; piston; spheres; steel; surface; system; wear
• On monitoring of mechanical characteristics of hot rolled S355J2 steel by Angelova, D.; Yordanova, R.; Georgiev, A.; Yankova, S. (2016) - 268 a. b. Figure 2: Comparative analysis of mechanical properties of hot-rolled plate/sheet, obtained by strain–speed–temperature Regimes A and B; a. – plate/sheet with final thickness 30 mm; b. – plate/sheet with final thickness 40 mm. 0 100 200 300 400 500 600 700 1 2 3 4 5 6 7 8 9 10 Sheet mark number T e n s il e s tr e n g th , R m , М Р а 470 МРа (ЕN 10025-2:2004) 630 МРа (ЕN 10025-2:2004) 0 100 200 300 400 500 600 1 2 3 4 5 6 7 8 9 10 Sheet mark number Y ie ld S tr e n g th , R e , M P a 345 МРа (ЕN 10025-2:2004) 430 МРа (ЕN 10025-2:2004) 0 10 20 30 40 50 1 2 3 4 5 6 7 8 9 10 Sheet mark number E lo n g at io n a ft er f ra ct u re А , % min 20% (ЕN 10025-2:2004) 0 50 100 150 200 250 1 2 3 4 5 6 7 8 9 10 Sheet mark number V -N o tc h Im p ac t E n er g y К , J min 27J (ЕN 10025-2:2004) 0 100 200 300 400 500 600 700 1 2 3 4 5 6 7 8 9 10 Sheet mark number T e n s il e s tr e n g th , R m , М Р а 470 МРа (ЕN 10025-2:2004) 630 МРа (ЕN 10025-2:2004) 0 100 200 300 400 500 600 1 2 3 4 5 6 7 8 9 10 Sheet mark number Y ie ld S tr e n g th , R e , M P a 345 МРа (ЕN 10025-2:2004) 430 МРа (ЕN 10025-2:2004) 0 10 20 30 40 50 1 2 3 4 5 6 7 8 9 10 Sheet mark number E lo n g a ti o n a ft e r fr a c tu re А , % min 20% (ЕN 10025-2:2004) 0 50 100 150 200 250 1 2 3 4 5 6 7 8 9 10 Sheet mark number V -N o tc h I m p a c t E n e rg y К , J min 27J (ЕN 10025-2:2004) D. Angelova et alii, Frattura ed Integrità Strutturale, 37 (2016) 265-271; DOI: 10.3221/IGF-ESIS.37.35 269 a. b. Figure 3: Energy-Stress Constructions-Spaces MNLQQ1M1N1L1, expressing mechanical behaviour of: a. - 30 mm plates/sheets; and b. - 40 mm plates/sheets. D. Angelova et alii, Frattura ed Integrità Strutturale, 37 (2016) 265-271; DOI: 10.3221/IGF-ESIS.37.35 270 Figure 5: Energy-Stress-Elongation Constructions-Space MVZQQ1M1V1Z1, expressing mechanical behaviour, including plasticity, of 30 mm plates/sheets CONCLUSION he technological process of obtaining hot-rolled steel plates/sheets of steel S355J2 + N has been investigated aiming at improving mechanical characteristics of the final product. Keywords: energy; fig; regime; rolling; sheet; steel; stress
• Recast layers on high speed steel surface after electrical discharge treatment in electrolyte by Krastev, D.; Paunov, V.; Yordanov, B. (2016) - In the controlled recast processes it is possible to produce surface layer with determinate chemical composition, thickness, structural characteristics and properties, which are unique for the material with the very high hardness, corrosion- and wear resistance. Microsoft Word - numero_37_art_37 D. Krastev et alii, Frattura ed Integrità Strutturale, 37 (2016) 280-286; DOI: 10.3221/IGF-ESIS.37.37 280 Focused on Fracture Mechanics in Central and East Europe Recast layers on high speed steel surface after electrical discharge treatment in electrolyte D. Krastev, V. Paunov, B. Yordanov University of Chemical Technology and Metallurgy, Sofia, Bulgaria krastev@uctm.edu ABSTRACT. Keywords: discharge; electrolyte; layer; recast; resistance; steel; surface; treatment
• Evaluation of the increased load bearing capacity of steel beams strengthened with pre-stressed FRP laminates by Bennati, S.; Colonna, D.; Valvo, P.S. (2016) - Microsoft Word - numero_38_art_47 S. Bennati et alii, Frattura ed Integrità Strutturale, 38 (2016) 377-391; DOI: 10.3221/IGF-ESIS.38.47 377 Evaluation of the increased load bearing capacity of steel beams strengthened with pre-stressed FRP laminates S. Bennati, D. Colonna, P.S. Valvo Università di Pisa, Dipartimento di Ingegneria Civile e Industriale, Largo Lucio Lazzarino, 56122 Pisa, Italy s.bennati@ing.unipi.it, p.valvo@ing.unipi.it ABSTRACT. Steel beam; FRP strengthening; Adhesive; Beam theory; Cohesive-zone model; Analytical solution; Pre-stressing; Ultimate limit state; Keywords: b b; b g; beam; f b; ipe; q b; s b; steel;  
• Experimental tests on slip factor in friction joints: comparison between European and American Standards by Maiorana, Emanuele; Zampieri, Paolo; Pellegrino, Carlo (2017) - The differences in experimental methods of slip test and evaluation of them for the mentioned standards are discussed. Slip test on only blasted surfaces The material of the specimens was weathering steel with characteristics as in EN 10025-5 [21] S355J0W. Fig. Keywords: factor; friction; joints; rcsc; slip; slip factor; specimens; steel; surfaces; tests; value
• Influence of the Coupling between the Mechanical Characteristics and the Welding Conditions by the FSSW Process: Case of the Bimaterial Alu-Steel by Bouchouicha, Benattou; Mekri, H.; Miloudi, A.; Christophe, H.; Imad, A. (2018) - Manufacturing of high strength steel and aluminum for a mixed material body in white, Adv. Mater. MATERIALS AND COMPOSITION ommercial grade AA 6061 alloy and galvanized steel sheets of 1.7mm thick were used as the starting materials. Keywords: friction; fssw; rpm; steel; stir; tool; welding
• An assessment of composite repair system in offshore platform for corroded circumferential welds in super duplex steel pipe by de Barros, Silvio; Budhe, Sandip; Banea, Mariana D.; Rohen, Ney R.F.; Sampaio, Eduardo M.; Perrut, Valber A.; Lana, Luiz D.M. (2018) - Technical note An assessment of composite repair system in offshore platform for corroded circumferential welds in super duplex steel pipe S. de Barros, S. Budhe, M.D. Banea Federal Center of Technological Education in Rio de Janeiro – CEFET/RJ, Rio de Janeiro/RJ, Brazil silvio.debarros@gmail.com, http://orcid.org/0000-0002-2520-569X sandipiit@gmail.com mdbanea@gmail.com, http://orcid.org/0000-0002-8378-2292 N.R.F. Rohem Instituto Federal Fluminense, Rio de Janeiro, Brazil Hence, the composite Citation: de Barros, S., Budhe, S., Banea, M.D., Rohem, N.R.F., Sampaio, E.M., Perrut, V.A., Lana, L.D.M., An assessment of composite repair system in offshore platform for corroded circumferential welds in super duplex steel pipe, Frattura ed Integrità Strutturale, 44 (2018) 151-160. Keywords: composite; corrosion; defect; perimeter; pipe; pressure; repair; steel; system; thickness
• Effects of weld size on stress concentration factors of CHS-CFSHS joints by Yang, Delei; Tong, Lewei (2018) - This paper aims to disclose the effects of weld size on hot spot stress in the calculation of fatigue performance of the joints. After reviewing the previous studies and the relevant specifications on weld size, the author probes into the effects of weld size on the stress concentration factor (SCF) of CHS-CFSHS joints via finite- element analysis. Keywords: brace; chord; joints; scf; size; steel; weld; weld size
• Evaluation of the dynamic response of structures using auxetic-type base isolation by Drosopoulos, Georgios; Naidoo, Preyolin (2019) - RESULTS AND DISCUSSIONS he response and performance of auxetic type base isolation systems under seismic loading will be investigated in this section. Thus, based on the vibrational damping performance of auxetic materials found in literature, the usage of auxetic materials in base isolation systems is explored. Keywords: analysis; base; base isolation; earthquake; integrità; isolation; materials; steel; structure; strutturale; system; type
• Crumbling of Amatrice clock tower during 2016 Central Italy seismic sequence: Advanced numerical insights by Clementi, Francesco; Milani, Gabriele; Ferrante, Angela; Valente, Marco; Lenci, Stefano (2019) - Evaluation of different approaches for the estimation of the seismic vulnerability of masonry towers, Bull. To investigate the mechanical behaviour of masonry structures, commonly finite element methods are used, often including very sophisticated constitutive laws taking into account post-elastic behaviours and damage [6–12]. Keywords: amatrice; bell; cell; chains; clementi; contact; doi; fig; friction; italy; masonry; sequence; steel; tower
• Web Rotational Stiffness of Continuous Steel-Concrete Composite Castellated Beams by Silva, Carla Cristiane; Caldas, Rodrigo Barreto; Fakury, Ricardo Hallal; Carvalho, Hermes; Dias, João Victor Fragoso (2019) - Web rotational stiffness (Calenzani [9]). Therefore, it is considered that the numerical model is suitable for simulations of web stiffness. Keywords: beams; bending; buckling; lateral; moment; numerical; openings; profile; results; steel; stiffness; web
• Comparison of the mechanical response of B400c and B450c dual phase steel bar categories, in long terms by Apostolopoulos, Charis ; Drakakaki, Argyro; Apostolopoulos, Alkiviadis; Koulouris, Konstantinos (2019) - Consequences of steel corrosion on the ductility properties on rein- forcement bar, Construction and Building Materials, 22, pp. CONCLUSIONS he conclusions of the present study can be summarized as follows: • Steel bar category B450c recorded slightly higher mass loss percentages than B400c steel class, a fact that demon- strates that the first category is more vulnerable to corrosion. • Keywords: apostolopoulos; b450c; categories; corrosion; loss; mass; performance; specimens; steel; structures; tensile; tests
• A new approach of CMT seam welding deformation forecasting based on GA-BPNN by Lu, Yao; Xing, Yanfeng; Li, Xuexing; Xu, Sha (2020) - The flow chart of GA Optimized BPNN method After the GA-BPNN model is established, it can be used to deal with complex nonlinear problems, which provides a reference for the subsequent prediction of aluminum steel welding deformation. Welding deformation affects the quality of the welded parts. Keywords: aluminum; bpnn; deformation; network; neural; plate; prediction; steel; welding; welding deformation
• Research of stress distribution in the cross-section of a bimetallic perforated plate perpendicularly loaded with concentrated force by Konieczny, Mateusz; Achtelik, Henryk; Gasiak, Grzegorz (2020) - For calculations it was assumed: P = 10 kN – load in the form of concentrated force distributed around the circumference of the hole with a diameter; b = 12 mm – hole diameter; b1 – 14 mm – pressure stamp diameter; D = 300 mm – outer diameter of the plate; H = 10 mm – base layer thickness (steel plate); a = 2.5 mm – applied layer thickness (titanium plate); h1 = 5.64 mm (Fig. 2); h2 = 4.36 mm (Fig. 2); The mechanical properties of the steel plate and titanium plate are taken from Tab. The research results presented in the paper can be used by engineers to design bimetallic perforated plates perpendicularly loaded to their surface. Keywords: bimetallic; layer; plate; r r; steel; stress; titanium
• Microstructural and mechanical characterization of a stainless-steel wire mesh–reinforced Al-matrix composite: Bimatallic components for lightweight design by Ferro, Paolo; Fabrizi, Alberto; Bonollo, Franco; Berto, Filippo (2020) - MATERIALS AND METHODS tainless steel wire mesh–reinforced Al-matrix composite samples were obtained by gravity casting. DISCUSSION tainless steel wire mesh–reinforced Al-matrix composite specimens were obtained. Keywords: alloy; aluminum; bonding; casting; doi; heat; interface; matrix; steel; treatment; wire
• Effect of nylon fabric reinforcement on the mechanical performance of adhesive joints made between glass and GFRP by Munafò, Placido ; Marchione, Francesco; Chiappini, Gianluca; Marchini, Monica (2021) - Further studies [22] tested the effect of adhesive joints reinforcements experimentally, using steel wires positioned inside a brittle glass matrix, studying their mechanical behavior through mathematical models. Figure 5: Double-lap specimens’ geometry (mm), section view and plan view (a); detail of unreinforced joint (b), adhesive reinforced joint with nylon in middle position (c); adhesive reinforced joint with nylon on glass (d); adhesive reinforced joint with nylon on GFRP (e); adhesive reinforced joint with nylon both on glass and GFRP (f). Keywords: adhesive; doi; failure; gfrp; glass; joints; lap; nylon; reinforcement; steel; tests
• Influence of 3d-printing parameters on the mechanical properties of 17-4PH stainless steel produced through Selective Laser Melting by Andreacola, Francesca Romana; Capasso, Ilaria ; Pilotti, Letizia; Brando, Giuseppe (2021) - The horizontally 85° oriented specimens exhibit residual stress values of 35 MPa in the 0° direction and 25 MPa in the other direction (-106% and -104% compared to as-built samples). The specimens horizontally 85° oriented are the only ones with negative residual stress values of -548 MPa in the 0° direction and -568 MPa in the other direction, which correspond to compressive residual stresses. Keywords: direction; doi; heat; laser; manufacturing; mpa; printing; process; samples; scanning; specimens; steel; values
• Web post-buckling strength of thin-webbed cellular beams using carbon PFRP profiles by Guedaoura, Hamda; Hadidane, Yazid (2022) - Currently, cellular steel beams are widely used by structural engineers and major companies due to their useful structural applications and serviceable performance. Design procedure for the web-post buckling of steel cellular beams, J. Constr. Keywords: beams; buckling; cfrp; doi; failure; post; ps1; ps2; steel; web
• Al2O3 and TiO2 flux enabling activated tungsten inert gas welding of 304 austenitic stainless steel plates by Patil, Hiralal S.; Patel, D. C. (2022) - However, there was no significant difference in the microstructure between conventional TIG weld metal and activated TIG weld metal. With activated TIG welding, we can experience a high degree of penetration into the joint and a high depth-width ratio, which indicates a high degree of energy concentration. Keywords: arc; doi; flux; oxide; process; steel; tig; tig welding; tio2; welding; welds
• Identification of the anisotropic behavior of the laser welded Interstitial Free steel HC260Y subjected to uniaxial tensile tests by Arfaoui, Latifa; Samet, Amel; Znaidi, Amna (2022) - In order to determine the mechanical properties of welded specimens, the tensile specimens were prepared as per ISO 4136- 2013 specifications (Fig.2). Physical understanding of ferrite grain growth during welding in interstitial free steels (IFS), Arab J Sci Eng, 34, pp. 115-127. Keywords: arfaoui; behavior; direction; doi; hardening; identification; laser; material; steel; tensile; welding
• Numerical investigation on strengthening steel beams with web openings using GFRP by Guedaoura, Hamda; Hadidane, Yazid; Altaee, Mohammed J (2022) - Up to 360kN of load, all GFRP strengthened beams displayed a linear graph similar to the original and CFRP strengthened beams (B0 and B2-R0). Microsoft Word - numero_62_art_03_3631.docx H. Guedaoura et alii, Frattura ed Integrità Strutturale, 62 (2021) 26-53; DOI: 10.3221/IGF-ESIS.62.03 26 Numerical investigation on strengthening steel beams with web openings using GFRP Hamda Guedaoura, Yazid Hadidane Civil Engineering Laboratory (LGC), Badji Mokhtar- Annaba University, P. O. Box 12, 23000 Annaba, Algeria hamda.guedaoura@gmail.com; hamda.guedaoura@univ-annaba.org y.hadidane@gmail.com; yazid.hadidane@univ-annaba.dz Mohammed J. Altaee Environment research and studies center, University of Babylon, Hilla, Iraq mohammed.altaee@uobabylon.edu.iq ABSTRACT. Keywords: beams; cfrp; doi; figure; frattura; gfrp; guedaoura; igf; integrità; specimen; steel; strengthening; strutturale; web
• The Metallurgical hydrogen as an indicator and cause of damage to rolled steel: Hydrogen diagnostics of fracture by Polyanskiy, Vladimir; Loginov, Victor; Yakovlev, Yuriy; Polyanskiy, Anatoly; Olekov, Vecheclav; Rostovykh, Gregory (2022) - Modern structural alloys begin to “feel” this effect starting from hydrogen concentrations of 0.1 ppm To measure the distribution of hydrogen concentration in the metal of the I-beam, an industrial mass-spectrometric hydrogen analyzer AV-1 was used. Keywords: beam; concentration; distribution; doi; hydrogen; metal; samples; steel
• Numerical analysis of repaired wall loss defect pipelines for optimum composite wrap thickness by Khaise, Muhammed; de Barros, Silvio; Rohem, Ney; Banea, Maria; Budhe, Sandip (2022) - Researchers found that the prediction of composite repair thickness as per ISO/TS 24817 standards is too conservative compared with the numerical and hydrostatic test results [5, 12, 16, 17, 29, 30]. The numerical results of composite repair thickness are validated with previous experimental results of repaired wall loss defect pipe. Keywords: composite; defect; failure; loss; mpa; numerical; pipe; pressure; repair; results; steel; stress; thickness; wall; wrap
• Effect of Ti addition and cast part size on solidification structure and mechanical properties of medium carbon, low alloy cast steel by Tenaglia, Nicolás Emanuel; Fernandino, Diego; Basso, Alejandro Daniel (2022) - Its use aims at reducing steel grain size by means of an increase of the number of sites for heterogeneous nucleation during solidification. For higher Ti content, the solidification interval of the phases increases, as can be observed in Fig. Keywords: addition; cast; ferrite; fig; heavy; inch; size; solidification; steel
• Failure Analysis of Boron Steel Components for Automotive Applications by Boniardi, Marco Virginio; Casaroli, Andrea; Sirangelo, Laura; Monella, Sergio; Mazzola, Michele (2023) - The chemical analysis performed on sample surfaces shows an increase in the nitrogen content from sample A.1 (0.0064%) to sample A.2 (0.0190%) and sample A.3 (0.0460%). The two series of steel samples were quenched and tempered in the same furnace at the same time. Keywords: annealing; boron; components; hardness; samples; steel; surface
• Behavior of a Multi-Story Steel Structure with Eccentric X-Brace by Abdulridha, Abdulkhalik (2023) - The lateral rigidity of eccentric X-brace frames is lower than that of concentrically braced frames, particularly when diagonal bracing is used. This study employs computational modelling to analyze multi-story steel buildings featuring an eccentric X-brace system. Keywords: b12; b15; b16; b20; b25; brace; brace section; buildings; sc12; sc6; sc9; ss6; ss9; steel; story; story buildings; w6x16
• Effect of Pre-tensioning Force on Behavior of Buckling Restrained Brace (BRB) Supported by Double Pre-tensioning System by Selim, Mohamed; E. Kamel, Muhammad; Elshamy, Eman; Emara , Mohamed (2023) - NUMERICAL SIMULATION AND VERIFICATION he main components of the studied BRB specimen are core plate, which represents the main item of the specimen, external case laterally supported by pre-tensioning steel cables to prevent the out-of-plane buckling. Microsoft Word - numero_67_art_15_4579.docx M. Selim et alii, Frattura ed Integrità Strutturale, 67 (2024) 205-216; DOI: 10.3221/IGF-ESIS.67.15 205 Effect of pre-tensioning force on behavior of Buckling Restrained Brace (BRB) supported by double pre-tensioning system Mohamed Selim, Muhammad E. Kamel, Eman Elshamy Structural Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, 44519, Egypt mselim940@gmail.com, https://orcid.org/0000-0002-5114-9644 muhammad.e.kamel@gmail.com, https://orcid.org/0009-0000-7142-1214 EAElshamy@ene.zu.edu.eg, https://orcid.org/0000-0001-9882-5905 Mohamed Emara Structural Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, 44519, Egypt Department of Civil Engineering, Delta Higher Institute for Engineering & Technology, Mansoura, Egypt mremara@eng.zu.edu.eg, https://orcid.org/0000-0003-4936-5257 KEYWORDS. Keywords: brb; buckling; core; engineering; force; journal; p40; range; st37; steel; structures; system
• Evolution of prototyping in automotive engineering: a Comprehensive Study on the reliability of Additive Manufacturing for advanced powertrain components by Cecchel, Silvia; Ferraresi, Riccardo; Magni, Matteo; Guerini, Leonardo; Cornacchia, Giovanna (2024) - These additional explanations remain in accordance to the decrease of mechanical properties from cylindrical to flat samples observed in the current research. Figure 2: Tensile test specimens, flat sample on the left and cylindrical sample on the right. Keywords: 4ph; arm; austenite; cecchel; cylindrical; doi; effect; engine; fig; heat; laser; martensite; microstructure; properties; rocker; samples; steel; test; treatment
• A method for rapid estimation of residual stresses in metal samples produced by additive manufacturing by Fedorenko, Alexey; Firsov, Denis; Evlashin, Stanislav; Fedulov, Boris; Lomakin, Evgeny (2024) - Although similar mechanical methods for analyzing residual stresses are well-established, our study introduces a distribution form for residual stress specifically for LPBF samples, supported by numerical analysis. Microsoft Word - numero_68_art_18_4809.docx A.Fedorenko et alii, Frattura ed Integrità Strutturale, 68 (2024) 267-279; DOI: 10.3221/IGF-ESIS.68.18 267 A method for rapid estimation of residual stresses in metal samples produced by additive manufacturing A. Fedorenko, D. Firsov, S. Evlashin Center for Materials Technologies, Skolkovo Institute of Science and Technology, Russia a.fedorenko@skoltech.ru, https://orcid.org/0000-0002-3260-7531 d.firsov@skoltech.ru, https://orcid.org/0000-0002-0640-9494 s.evlashin@skoltech.ru, https://orcid.org/0000-0001-6565-3748 B. Fedulov, E. Lomakin Lomonosov Moscow State University, Russia fedulov.b@mail.ru, https://orcid.org/0000-0002-1894-5964 evlomakin@yandex.ru, https://orcid.org/0000-0002-8716-5363 KEYWORDS. Keywords: cut; doi; frattura; laser; method; samples; steel; stress; stresses; strutturale
• Effect of cast part size on the microstructure and mechanical properties of a bainitic High-Carbon and High-Silicon Cast Steel by Fernandino, Diego; Basso, Alejandro Daniel; Tenaglia, Nicolás Emanuel (2024) - Ultra-high strength bainitic steels. Influence of crack micro-roughness on the plasticity-induced fatigue propagation in high strength steel, Frattura ed Integrità Strutturale, 41 pp. 62-65. Keywords: austempering; austenite; cast; casting; doi; properties; samples; steel; temperature; transformation
• Analysis of the influence of the anisotropy induced by cold rolling on duplex and super-austenitic stainless steels by Finelli, Angelo; Labanti, Martino (2013) - Fig 1 and 2 show duplex stainless steel microstructure, considering longitudinal, transversal and radial sections, respectively before and after the cold rolling treatment (respectively named as “A1” and “A1L”). It can be noticed that investigated steels show a non-homogeneity indicated by the different behaviour under tensile and O http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.13.03&auth=true A. Finelli et alii, Frattura ed Integrità Strutturale, 13 (2010) 24-30; DOI: 10.3221/IGF-ESIS.13.03 30 compression or by specimens coming from the same sampling direction, beyond an anisotropy indicated by the difference between the values obtained from the longitudinal and transversal specimens. Keywords: figure; microstructure; section; specimens; steel

• Characterization of fracture properties of thin aluminuminclusions embedded in anisotropic laminate composites by Bolzon, Gabriella; Buljak, Vladimir; Zappa, Emanuele (2011) - 10.3221/IGF-ESIS.19.02 25 Figure 8: Evolution of the left (a, continuous line: reference image 7; a, dashed line: image 22 ) and of the right (b: reference image 7, c: image 40) boundary between the aluminium laminate and the paperboard composite during the tensile test; in (b) and (c), two reference lines close to the interface where fracture develops (one on the paper side, one on the aluminium side) are separately monitored. The region of interest of the investigated material samples is monitored all along the experiment by digital image correlation techniques, which allow to recover qualitative and quantitative information about the metal deformation and about the evolution of the damaging processes leading to the detachment of the inclusion from the surrounding laminate composite. Keywords: aluminium; bolzon; displacement; fig; figure; image; material; paperboard; specimen; test
• Experimental investigation of fibre reinforced plastics with hybrid layups under high-velocity impact loads by Romano, Marco; Hoinkes, Carl J. J.; Ehrlich, Ingo; Höcherl, Johann; Gebbeken, Norbert (2014) - These are amongst others fibre orientation, fibre volume content, layup, geometry of the specimen and of the impactor as well. Analytical approximation of fibre volume content for test panels with hybrid stacking sequences When the hybrid stacked layups are considered none of the two afore described experimental methods for the determination of the fibre volume content are suitable because both organic and inorganic kinds of reinforcement fibres are used in the respective layups, as listed in Tab. Keywords: content; energy; fibre; fibre volume; hybrid; impact; impactor; layer; layups; material; panels; reinforcement; test; velocity; volume content
• Simulation of the behavior of aluminum alloys welded in Friction Stir Welding FSW: (Case of AA5083 and AA 6082) by Taha, Bounini Bousekrine; Benattou, Bouchouicha; Ghazi, Abdelkader (2018) - Welding speed of 40mm/min, b) Welding speed of 80mm/min, c) Welding speed of 100mm/min, d) Friction Stir Welding (FSW) Simulation. Keywords: 6082; friction; fsw; heat; material; min; rpm; speed; stress; tool; welding; workpiece
• Mechanical Behavior Analysis of a Friction Stir Welding (FSW) for Welded Joint Applied to Polymer Materials by kaddour, Hachellaf; Hadj Miloud, Meddah; El Bahri, Ould Chikh; Abdallah, Lounis (2018) - 7, we remarked also that the maximum stress Rm = 24.3 MPa became important, an improvement of the modulus of elasticity with respect to that of the no welded specimen which was of value Rm = 20.41 MPa, at the same time or we have a reduced plastic part noticing on the curves where the plasticity domain of the material (plastic side on the tensile curve) was lost, therefore the material has become rigid, the latter linked to several phenomena and several parameters influenced by the FSW welding operation and even the material as there are other parameters that play an important role, all due to the influence of the machined weld joint that changes the mechanical behavior of the FSW welded material. In other sense the improvement of mechanical properties such as fatigue, Zhou et al has confirmed through these tests on the service life is better in FSW (compared to other welding processes), higher service life for FSW welded joints (9 to 12 times higher) Keywords: fig; friction; fsw; material; parameters; speed; stir; test; tool; welding
• Optimization of Vanadium Content for Achieving Higher Wear Resistance and Hardness in High Cr-V White Cast Irons for Ball Tube Mill Liner Application by Kumar, Dhirendra; Jayaraman, G.; Swamy, M.; A. H. V., Pavan; M. C., Antony Harison; Sudhakar, A. N. (2019) - These plates are mostly made of high chromium cast irons (HCrCIs) and B http://www.gruppofrattura.it/VA/49/2275.mp4 D. Kumar et alii, Frattura ed Integrità Strutturale, 49 (2019) 507-514; DOI: 10.3221/IGF-ESIS.49.47 508 possess high hardness and wear resistance. Vanadium can form vanadium carbide (VC) with Vickers hardness of HV2800 which is much harder than that of M7C3 with Vickers hardness, HV 1200~1800 in high chromium cast iron Keywords: carbides; cast; chromium; cr26moni; hardness; impact; iron; material; vanadium; wear
• Experimental and numerical study on the influence of critical 3D printing processing parameters by Chatzidai, Nikoletta; Karalekas, Dimitrios (2019) - Additive manufacturing; Fused deposition modelling; Process parameters; Temperature profiles; Finite element analysis. Each peak T I N. Chatzidai et alii, Frattura ed Integrità Strutturale, 50 (2019) 407-413; DOI: 10.3221/IGF-ESIS.50.34 411 (a) (b) Figure 3: Temperature profiles as recorded by thermocouples together with the temperature peak values as calculated by FEA for embedding locations: (a) 1st layer and (b) 21st layer. is followed by a rapid decrease in the temperature. Keywords: building; deposition; doi; fdm; layer; material; printing; process; specimen; temperature
• Uniformity of thickness of metal sheets by patchwork blanks: potential of adhesive bonding by Parodo, Gianluca; Giuliano, Gillo; Sorrentino, Luca (2020) - [mm] 2.3 1.3 cv 7.9% 7.1% Table 4: Experimental results of forming tests for base sheets and patchwork blanks. Figure 3: Experimental average force-stroke curves of the punch for base sheets and patchwork blanks characterized by a circular patch of 0.1 mm thickness and 30 mm radius. Keywords: base; blanks; doi; forming; material; patch; patchwork; process; sheet; thickness
• An innovative fixture for testing the crashworthiness of composite materials by Vigna, Lorenzo; Babaei, Iman; Garg, Ravin; Belingardi, Giovanni; Paolino, Davide Salvatore; Calzolari, Andrea; Galizia, Giuseppe (2020) - Despite the growing diffusion of composite materials in automotive and aerospace sectors, a standard procedure for testing their crashworthiness has not been developed yet. At present, the international standards for testing composite materials under impact conditions are not adequate to test their crush behavior. Keywords: composite; crushing; energy; failure; fixture; force; impact; material; specimen; test; testing
• Damage assessment of different FDM-processed materials adopting Infrared Thermography by D'Andrea, Danilo; Risitano, Giacomo; Raffaele, Marcello; Cucinotta, Filippo; Santonocito, Dario (2022) - To verify the correlation between the limit stress of FDM materials and their fatigue limit a traditional fatigue test campaign have to be performed in future studies. A failure analysis was performed on the fracture surfaces to confirm the behaviour of the material, highlighted by the engineering curves S D. D’Andrea et alii, Frattura ed Integrità Strutturale, 62 (2022) 75-90; DOI: 10.3221/IGF-ESIS.62.06 88 Further studies must be performed to correlate the limit stress with the fatigue limit of FDM material. Keywords: abs; angle; doi; fdm; fig; material; orientation; petg; pla; printing; raster; specimens; stress; temperature; tensile
• Analyzing Microstructural Features, Surface Topography, and Scratch Resistance of Innovative Nano-Composites Coated with High Velocity Air-Fuel Technology by Naveen, G. J.; Sampathkumaran, P.; Sathyanarayanaswamy, A.; Lakshmikanthan, Avinash (2023) - [8] and plasma spraying, HVAF coatings provide a number of advantages. Comparing HVAF coatings to other thermal spray B G. J. Naveen et alii, Frattura ed Integrità Strutturale, 66 (2023) 178-190; DOI: 10.3221/IGF-ESIS.66.11 180 coating techniques, HVAF coatings are also more affordable and environmentally benign. Keywords: coating; doi; fuel; hvaf; material; powder; resistance; scratch; sem; spray; substrate; surface; thermal; velocity
• Longitudinal elastic nonlinearity of composite material by Fedulov, Boris; Bondarchuk, Daria; Lomakin, Evgeny (2023) -   11 11 12 22 13 33 11 12 11 22 22 23 33 22 2 22 13 2312 13 11 23 22 33 33 33 12 13 23 1 Φ (( ) ( ) 2 ( )   ) f A A A A A A A A G G G                            (2) M B.N. Fedulov et alii, Frattura ed Integrità Strutturale, 67 (2024) 311-318; DOI: 10.3221/IGF-ESIS.67.22 313 where    11f  – arbitrary function.  11 11 11 11 11 10 1 0 2 f f A E         (5) where 1E is the elastic modulus in the vicinity of zero stress-strain values. NUMERICAL EXPERIMENT he numerical experiment is focused on investigating the impact of initial fiber waviness on the elastic modulus of the composite material in the fiber direction under uniaxial compression. Keywords: composite; doi; elastic; fiber; material; waviness
• Optimization of the internal structure of 3D-printed components for architectural restoration by Tomei, Valentina; Grande, Ernesto; Imbimbo, Maura (2024) - In this regard, as the failure modes of rhomboidal samples involve both flanges and internal walls, the shear stress value obtained for reticular samples is multiplied by the cross-sectional area of both flanges and internal walls to obtain the shear force (the depicted cross-section is shown in Fig. 13c, where Fi, PT,1 are the internal forces related to the flanges, Fi, PT,2 are the internal forces related to the internal walls, d1* and d2* are the relevant internal lever arm, and MPT is the bending moment). Figure 13: Structural scheme of the samples (a), cross-sectional analysis of reticular samples (b) and rhomboidal samples (c). Keywords: configuration; displacement; doi; fig; material; printing; rhomboidal; samples; stress; strutturale; tensile; tests; walls
• Mechanical Evaluation of Recycled PETG Filament for 3D Printing by Marsavina, Liviu; Dohan, Vlad; Galatanu, Sergiu-Valentin (2024) - CONCLUSIONS n conclusion, this study examined the behaviour of PETG when comparing specimens printed from new material versus recycled material through compression, tensile, and impact tests. While recycled material showed slightly lower tensile strength, a 50/50 mix with virgin granules matched the tensile strength of purchased material, indicating significant potential for industrial recycling. Keywords: doi; filament; impact; material; petg; printing; properties; recycling; specimens; strutturale; tensile; test
• Impact of tool rotational speed on friction stir welded joints of AA2014-T6/AA5052-H32: synthesis, microstructural, mechanical and fractographic behaviour by Sathya, N. N.; Herbert, Mervin A.; Shettigar, Arun Kumar; Vatnalmath, Manjunath (2025) - Microsoft Word - numero_75_art_01_5585.docx N. N. Sathya et alii, Fracture and Structural Integrity, 75 (2026) 1-12; DOI: 10.3221/IGF-ESIS.75.01 1 Impact of tool rotational speed on friction stir welded joints of AA2014-T6/AA5052-H32: synthesis, microstructural, mechanical and fractographic behaviour Sathya Narayana N, Mervin A. Herbert, Arun Kumar Shettigar Department of Mechanical Engineering, NITK, Surathkal, Mangaluru – 575025, India sathyazen2@gmail.com, http://orcid.org/0000-0001-2345-6789 merhertoma@nitk.edu.in, akshettigar@nitk.edu.in Manjunath Vatnalmath Department of Mechanical Engineering, RNS Institute of Technology, Bengaluru-560098, Visvesvaraya Technological University Karnataka, India vmanjunathsit@gmail.com, https://orcid.org/0000-0003-3138-9453 KEYWORDS. A fuzzy model to predict the mechanical characteristics of friction stir welded joints of aluminum alloy AA2014-T6. Keywords: alloys; doi; fig; friction; fsw; heat; joints; material; rpm; speed; stir; tool; trs; welding
• Influence of laser shock peening on the residual strains and stresses in additively manufactured TC4 by Bartolomei, Mariia; Vshivkov, Aleksei N.; Kudryashev, Igor S.; Lozhkin, Denis V.; Chumaevskii, Andrey V.; Korsunsky, Alexander M. (2025) - Additively manufactured TC4, Residual strains, Residual stresses, Laser shock peening. If the pressure induced by the plasma expansion exceeds the material's dynamic yield strength, plastic deformation occurs, resulting in residual stresses. Keywords: build; depth; direction; doi; laser; material; printing; shock; specimens; strains; stresses; surface

• Residual welding stress of I-section members beyond the limits of width-thickness ratio by Li, Zhiyuan; Zhao, Zhiyun (2017) - Despite the extensive studies on the effect of width-thickness ratio and residual stress on member behavior, few scholars have probed into the residual stress distribution on the I-section members. Steel structure; Residual stress; Material grade; Width-thickness ratio; principle of blind hole drilling; I-shaped members. Keywords: distribution; doi; figure; members; ratio; section; specimens; stress; thickness; web; width
• Classification of ductile cast iron specimens: a machine learning approach by De Santis, Alberto; Iacoviello, Daniela; Di Cocco, Vittorio; Iacoviello, Francesco (2017) - The classifier C2 has the aim of determining the class membership of images of Type II and III; when applied to an image of Type I, for example if the classifier C1 has provided an erroneous classification, in more than 91% the C2 classifier assigns the specimen of Type I to the class of Type II images. Only few attempts have been made to automatize the classification of microstructural image data [8]. Keywords: classification; classifier; data; features; iii; images; procedure; set; specimens; type; type ii
• Influence of hydrothermal ageing on single lap bonded CFRP joints by Bellini, Costanzo; Parodo, Gianluca; Polini, Wilma; Sorrentino, Luca (2018) - [5,6] has studied the durability in distilled water of bonded joints realized with aluminum adherends combined with various types of epoxy adhesives. For example in the case of epoxy adhesives, it is known that the factors of influence of the stability of the joint over time are mainly the temperature and humidity, but in most cases, it is impossible to estimate their effect on the durability of the joint except by experiments. Keywords: 9309na; adhesive; ageing; doi; joints; specimens; temperature; water
• Fracture modelling of adhesively-bonded joints by an inverse method by Campilho, Raul; Viana, Filipe; Rocha, Ricardo; Silva, Daniel; Araújo, Rui; Ribeiro, José (2019) - In this work, the cohesive laws of three adhesives, Araldite® AV138, Araldite® 2015 and Sikaforce® 7752, were obtained by the application of an inverse adjustment method between the numerical and experimental load-displacement curves (P-) of Double-Cantilever Beam (DCB) tests for tensile characterization and End-Notched Flexure (ENF) tests for shear characterization. In this work, the cohesive laws of three adhesives, Araldite® AV138, Araldite® 2015 and Sikaforce® 7752, were obtained by the application of an inverse adjustment method between the numerical and experimental P- curves of DCB tests for tensile characterization and ENF tests for shear characterization. Keywords: adhesive; araldite; av138; czm; dcb; dlj; doi; enf; experimental; joints; laws; shear; sikaforce; slj; specimens
• Simulation of the corrosion-induced damage on aluminum alloy 2024 specimens with equivalent surface notches by Alexopoulos, Nikolaos; Siskou, Nikoleta; Charalampidou, Christina-Margarita; Kourkoulis, Stavros (2019) - Correlation of corrosion exposure times to notches regarding ductility degradation In short corrosion exposure times, the degradation mechanism of ductility has been correlated in the open literature with the hydrogen embrittlement. Keywords: corrosion; decrease; doi; exco; exco solution; exposure; exposure times; nacl; notches; solution; specimens; surface; tensile; times
• Metal foaming by powder metallurgy process: investigation of different parameters on the foaming efficiency by Papantoniou, Ioannis; Kyriakopoulou, Helena; Pantelis, Dimitrios; Manolakos, Dimitrios (2019) - Concerning the powder morphology, it was concluded that in all tests the foams with the fine aluminium powder exhibited higher foaming efficiency than the foams with coarse aluminium powder. As far as it concerns the compaction pressure/foaming temperature, the highest foaming efficiency was observed for pre- cursors with compaction pressures higher than 700 MPa and high foaming temperatures of 750 oC and 800 oC. The speci- mens with 800 oC sintering temperature introduced a slightly higher foaming efficiency and foaming rate but collapsed sooner than the specimens with 750 oC. The compression tests with the specimens with the parameters that resulted to the higher foaming efficiency provided stress-strain curves characterized by the typical initial elastic response, followed by a deformation plateau with a positive slope and finally a transition to densification. Keywords: aluminium; compaction; efficiency; foaming; foams; metal; mpa; parameters; powder; process; specimens
• Impact behaviour of dissimilar AA2024-T351/7075-T651 FSWed butt-joints: effects of Al2O3-SiC particles addition by Morales, Cindy; Merlin, Mattia; Fortini, Annalisa; Garagnani, Gian Luca; Miranda, Argelia (2022) - C. Morales et alii, Frattura ed Integrità Strutturale, 60 (2022) 504-515; DOI: 10.3221/IGF-ESIS.60.34 511 Figure 8: Total impact energies (green histograms refer to un-reinforced joints, red histograms refer to reinforced joints). Figure 9: Peak forces (green histograms refer to un-reinforced joints, red histograms refer to reinforced joints). Keywords: addition; doi; energy; friction; impact; joints; parameters; particles; process; properties; specimens; stir
• Investigation into effective mechanical properties of porous material produced by the additive manufacturing method by Fakoor, Mahdi; Tabatabaee, Seyed Mohammad Javad (2023) - Microsoft Word - numero_65_art_14_4248.docx S. M. J. Tabatabee et alii, Frattura ed Integrità Strutturale, 65 (2023) 208-223; DOI: 10.3221/IGF-ESIS.65.14 208 Investigation into effective mechanical properties of porous material produced by the additive manufacturing method Seyed Mohammad Javad Tabatabaee, Mahdi Fakoor Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran mfakoor@ut.ac.ir, smj.tabatabaee@ut.ac.ir ABSTRACT. Porous materials are defined as materials that contain holes, voids, or spaces in their structures, which can be interconnected or isolated. Keywords: fdm; fig; holes; integrità; materials; porosity; properties; specimens; stress

• Investigation via morphological analysis of aluminium foams produced by replication casting by Boschetto, A.; Bottini, L.; Campana, F.; Consorti, L.; Pilone, D. (2013) - Foam density decreases by decreasing mould temperature. Figure 5: Foam density according to temperature and pressure variations on two levels. Keywords: density; foam; mould; pressure; process; salt; specimen; temperature
• Comparison between dog-bone and Gaussian specimens for size effect evaluation in gigacycle fatigue by Tridello, A.; Paolino, D.S.; Chiandussi, G.; Rossetto, M. (2013) - A suitable fillet radius between specimen parts 2 and 3 is considered for the Gaussian specimen model. In order to obtain larger risk volumes, a new specimen shape is proposed (Gaussian specimen). Keywords: bone; dog; gaussian; risk; specimen; stress; volume
• A new formulation for estimating maximum stress intensity factor at the mid plane of a SENB specimen: Study based on 3D FEA by Kudari, S. K.; Kodancha, K. G. (2014) - The authors [5] suggested a simple technique to determine 3D KI at the mid plane of a specimen by knowing 2D KI and Poison’s ratio (v). Based on their FE results, Kwon and Sun [5] have proposed a formulation to obtain the highest magnitude of 3D KI (at the centre of the specimen) based on magnitude of KI obtained by 2D analysis as: 2 2 3 1 1   D D K K (4) where  is Poisson’s ratio of the material. Keywords: analysis; specimen; stress; variation
• Design optimization of cruciform specimens for biaxial fatigue loading by Baptista, R.; Claudio, R. A.; Reis, L.; Guelho, I.; Freitas, M.; Madeira, J. F. A. (2014) - One can see that for arm thickness values less than 2 mm, both the major and minor ellipse radius, RM and Rm, increase with the arm thickness. rr, mm dd, mm tt, mm (fixed) Maximum Stress, MPa/kN Stress Difference, % 1.0 61.7 22.5 71 5.9 51.3 0.166 146 0.657 1.2 62.2 21.9 68 5.0 52.0 0.200 109 0.931 1.5 62.7 22.0 64 5.0 52.4 0.250 87 0.859 2.0 63.9 22.3 36 5.8 52.4 0.334 76 0.587 2.5 61.6 22.3 60 5.5 51.7 0.416 53 0.784 3.0 60.1 22.3 66 5.2 51.7 0.500 37 0.753 4.0 58.7 25.8 38 9.1 51.3 0.666 29 0.284 5.0 56.0 25.8 45 9.6 49.9 0.834 22 0.616 6.0 56.7 25.8 43 9.8 50.1 1.000 19 0.825 8.0 63.4 28.6 72 9.8 55.1 1.200 15 0.715 10.0 65.1 28.6 70 9.9 57.6 1.500 10 0.932 Table 3: Optimal specimen geometry for each Renard series value of arms thickness. Keywords: arms; center; geometry; level; optimization; specimen; spline; stress; thickness
• Deformation and failure of carbon fiber composite specimens with embedded defects during tension-torsion test by Tretyakova, Tatyana Viсtorovna; Wildemann, Valery E.; Strungar, Elena M.; Tretyakov, Mikhail P. (2018) - Tension with torsion testing of specimen with embedded defects In order to experimentally study the mechanisms of inelastic deformation and fracture of specimens of carbon fiber with internal defects under complex stress state, mechanical tests are performed with the proportional tension with torsion with the ratio 0.028k  . Microsoft Word - numero_46_art_27 V. E. Wildemann et alii, Frattura ed Integrità Strutturale, 46 (2018) 295-305; DOI: 10.3221/IGF-ESIS.46.27 295 Deformation and failure of carbon fiber composite specimens with embedded defects during tension-torsion test Valery E. Wildemann, Tatyana V. Tretyakova, Elena M. Strungar, Mikhail P. Tretyakov Center of Experimental Mechanics, Perm National Research Polytechnic University, Russia wildemann@pstu.ru, http://orcid.org/0000-0002-6240-4022 cem.tretyakova@gmail.com, http://orcid.org/0000-0001-9445-5185 cem.spaskova@mail.ru, http://orcid.org/0000-0002-2246-8638 cem_tretyakov@mail.ru, http://orcid.org/0000-0001-6146-6769 ABSTRACT. Keywords: composite; defects; deformation; doi; fields; specimen; strutturale; tension; torsion; type; wildemann
• The approach to fracture diagnosis by means of experimental measurements of the stored energy by Vedernikova, Alena; Iziumova, A.; Vshivkov, A.; Plekhov, Oleg (2019) - Figure 4: (a) Infrared thermography data vs heat flux sensor data; (b) Time dependence of heat dissipation and stored energy (Eqn. 4). Heat dissipation energy under fatigue based on infrared data processing, Quant Infrared Thermogr J., 11(1), pp. 2-9. Keywords: deformation; energy; heat; specimen; t t; temperature
• Comparative study of Shot creep of single-phase titanium alloys in air and neutral gas environment on the test temperature in range from 673 to 1323 K by Zamaraev, lev Michailovich; Smirnov, Sergey (2019) - Titanium alloy; Creep; Environment effect; Activation energy. To design such processes, one is to know the behaviour of creep at temperatures higher than the conventional working range (< 850 K for titanium alloys), i. e. at temperatures when the rate of creep provides better manufacturability. Keywords: air; alloy; argon; creep; doi; environment; heating; rate; smirnov; specimen; stress; temperature; titanium

• TWSME of a NiTi strip in free bending conditions: experimental and theoretical approach by Fortini, A.; Merlin, M.; Rizzoni, R.; Marfia, S. (2014) - Due to their attractive behaviour, NiTi shape memory alloys have been successfully applied in a broad set of innovative applications in aerospace, biomedical, mechanical and civil engineering fields. [14] Perkins, J., Hodgson, D., The two way shape memory effect, in: Duerig, T.W. et al (Eds.), Engineering aspect of shape memory alloys, Butterworth-Heinmann, (1990) 195-206. Keywords: bending; curvature; cycles; evolution; martensite; memory; shape; shape memory; temperature; training; variant; way
• Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure by Burgio, F.; Fabbri, P.; Magnani, G.; Scafè, M.; Pilloni, L.; Brentari, A.; Brillante, A.; Salzillo, T. (2014) - This study is aimed at investigating the relationship between infiltration temperature and the microstructure of obtained Py-C, for a pilot - sized CVI/CVD reactor. Fixing the other process parameters and varying only the temperature, from 1100°C to 1300°C, the Py-C infiltration was performed on fibrous preforms. Keywords: carbon; composites; cvi; infiltration; temperature
• A numerical approach for the analysis of deformable journal bearings by Benasciutti, D.; Gallina, M.; Munteanu, M. Gh.; Flumian, F. (2012) - The main findings of the work can be summarized as follows:  a temperature increase was shown to give a decrease of attitude angle β and an increase in pressure peak;  an increase of viscosity-to-pressure sensitivity (α value) gives a general increase of peak pressure, especially for pressure peaks greater than about 100 MPa;  the temperature effect was shown to be generally larger than pressure effect on pressure distribution;  the elastic deformation of journal bearing elements gives a more uniform pressure distribution, with a reduced maximum pressure peak compared to the case of perfectly rigid components. Obtained results show the great influence of elastic deformation of bearing components on oil pressure distribution, compared with results for ideally rigid components obtained by Raimondi and Boyd solution. KEYWORDS. Keywords: analysis; bearing; components; distribution; equation; journal; oil; pressure; temperature; viscosity
• Cold spray technology: future of coating deposition processes by Singh, Harminder; Sidhu, T.S.; Kalsi, S.B.S. (2012) - Cold spray (CS) belongs to a wide family of thermal spray technology with the difference that it is a solid state process in which spray particles are deposited via supersonic velocity impact at a temperature much below the melting point of the spray material. Moreover, the temperature of particles remain substantially below the initial gas preheat temperature due to short contact time of spray particles with the hot gas called dwell time and hence the name cold spray coating [4]. Keywords: coating; cold; deposition; gas; impact; materials; nozzle; particle; powder; pressure; process; spray; substrate; surface; technology; temperature; thermal; velocity
• Thermal stress analysis of different full and ventilated disc brakes by Baron Saiz, C.; Ingrassia, T.; Nigrelli, V.; Ricotta, V. (2015) - CONCLUSIONS ehaviour of different types of disc brake rotors has been investigated by means of coupled thermo-mechanical numerical analyses. [9] Belhocine, A., Bouchetara, M., Thermomechanical behavior of dry contacts in disc brake rotor with a grey cast iron composition, Thermal Science, 17(2) (2013) 599-609. Keywords: brake; braking; disc; heat; temperature; time; vanes
• Relation between the plastic instability and fracture of tensile tested Cu-Sn alloys investigated with the application of acoustic emission technique by Ozgowicz, W.; Grzegorczyk, B.; Pawelek, A.; Wajda, W.; Skuza, W.; Piatkowski, A.; Ranachowski, Z. (2015) - Intercrystalline brittle fissures at the contact point of three grains of the CuSn6P alloy after stretching at the temperature of 400°C. CONCLUSIONS he obtained results of investigations concerning the mechanical properties of industrial tin bronze CuSn6P at elevated temperature of deformation, applying the AE method and the performed structural and fractographic, analysis of the influence of temperature of deformation on the PLC effect and the intercrystalline cracking of the alloy permit to draw the following conclusions: 1. The aim of the present paper is to apply methods of acoustic emission in mechanical tests of uni-axial stretching of tin bronze of the type CuSn6P from industrial smelting, indicating distinctly a tendency to instability of plastic flow at elevated temperature of deformation due to the effect PLC. Keywords: alloy; cusn6p; deformation; effect; plc; range; temperature; tensile
• Analysis of cracking of low-alloy copper stretched at elevated temperature by Ozgowicz, Wojciech; Kalinowska-Ozgowicz, Elzbieta; Lenik, Klaudiusz; Duda, Aneta (2015) - MATERIALS AND METHODS he investigations were carried out on copper alloy CuNi2Si with grade designation mark CNCS (Hovadur). The copper alloy cracking mechanisms, which have not been fully explained yet, depend on many physicochemical, structural and mechanical factors related to the chemical composition (liquid films and segregations at the grain boundaries as well as inclusions and precipitations), structure of the alloy (grain size, crystallisation defects, non-uniform deformation) and deformation parameters (deformation temperature and strain rate, specimen surface condition, type of mechanical test) Keywords: alloy; approx; cuni2si; deformation; grains; temperature; tension
• An effect of heat insulation parameters on thermal losses of water-cooled roofs for secondary steelmaking electric arc furnaces by Mihailov, E.; Popgeorgiev, P.; Ivanova, M. (2016) - MATHEMATICAL MODEL OF HEAT EXCHANGE he normal work and efficient usage of water cooling elements requires restrictions to be made and a number of special features to be taken in consideration when defining the constructive parameters:  heat load under the influence of the arcs and metal;  cooling water movement regime;  outlet cooling water temperature;  possibilities for heat losses decrease through protective cooling covering with a definite emissivity and thickness. Microsoft Word - numero_37_art_39 E. Mihailov et alii, Frattura ed Integrità Strutturale, 37 (2016) 297-304; DOI: 10.3221/IGF-ESIS.37.39 297 Focused on Fracture Mechanics in Central and East Europe An effect of heat insulation parameters on thermal losses of water-cooled roofs for secondary steelmaking electric arc furnaces E. Mihailov, P. Popgeorgiev, M. Ivanova University of Chemical Technology and Metallurgy, Sofia, Bulgaria emil@uctm.edu ABSTRACT. Keywords: elc; heat; insulation; losses; surface; temperature; water
• Application of between- stand cooling in the production hot – rolled strips by Muhin, U.; Belskij, S.; Makarov, E.; Koynov, T. (2016) - Using this technology mode allows you to get a uniform cooling microstructure of metal strips and cut to length machine time rolling on 14 – 18%. Treatment with an increased acceleration stabilizes the metal microstructure on rolling strips on top of the thread speed and reduces the machine time rolling on 3-9%. KEYWORDS. Keywords: cooling; end; finishing; metal; microstructure; mill; rolling; strip; temperature
• Impact loading of a space nuclear powerplant by Kraus, Evgeny I.; Shabalin, Ivan I. (2013) - Equation of state; Shock waves; High-velocity impact. Because of thermodynamic nonequilibrium typical for polymorphic transformations in shock waves, the general thermodynamic relations for phase transitions (equality of chemical potential in the region of simultaneous existence of the phases and Clausius-Clapeyron equation) as applied to shock-wave processes can only be used as approximate estimates. Keywords: curve; energy; impact; liquid; melting; phase; pressure; reactor; shock; state; temperature; velocity
• A numerical and experimental study through laser thermography for defect detection on metal additive manufactured parts by Montinaro, N.; Cerniglia, D.; Pitarresi, G. (2017) - [16] Montinaro, N., Cerniglia, D., Pitarresi, G., Flying laser spot thermography technique for the NDE of fibre metal laminates disbonds, Composite Structures, 171 (2017) 63-76. [13] Montinaro, N., Cerniglia, D., Pitarresi, G., Detection and characterization of disbonds on fibre metal laminate hybrid composites by flying laser spot thermography, Composites Part B: Engineering, 108 (2017) 164-173. Keywords: defect; doi; experimental; fig; heat; laser; roi; sample; source; surface; technique; temperature
• Effect of machining parameters on the mechanical properties of high dosage short –carbon- fiber reinforced composites by Ferreira, José António Martins; Oliveira, Sergio; Silva, Joel; Capela, Carlos (2019) - Mechanical properties; Short fiber composites; Machinability of composites. 10 shows a SEM micrograph feature for 6mm length fiber composites fiber composites, which reveals a fair adhesion between resin matrix and fibers. Keywords: composites; cutting; doi; fiber; fig; machining; speed; surface; temperature; tensile
• The thermal damaging process of diorite under microwave irradiation by Lu, Xirui; Yuan, Chen; Junsen, Zeng; Qijun, Hu; Dadong, Shao; Haibin, Zhang; Xirui, Lu (2018) - Minerals can absorb microwaves to generate heat and weaken the mechanical properties by the effect of high temperatures. High temperatures would cause microscopic or macroscopic cracks even melting in rocks to reduce mechanical strength of rocks, such as point load and uniaxial compression strength Keywords: cracks; diorite; doi; eng; irradiation; microwave; minerals; temperature; ° c
• Comparative study on the deterioration of granite under microwave irradiation and resistance-heating treatment by Shou, He Zi; Hu, Qijun; Zeng, Junsen; He , Leping; Tang, Hexi; Li, Bingsheng; Chen, Shunzhang; Lu, Xirui (2019) - This variation not only illustrates uniform heating of microwave irradiation on the rock at high temperatures, but also reveals the mechanical performance of rock exposed to high temperature induced by microwave irradiation is more accurately to forecast. For a simplified description, microwave irradiation group was named group A and the resistance-heating group was named group B. Specimens were heated up to set temperatures (400 °C, 500 °C, 600 °C, 700 °C, 800 °C, 900 °C and 1000 °C) with a heating rate of 7 °C/min and then kept for 15 min. Real-time surface temperatures were measured by the infrared thermometer pre-installed in apparatuses, i.e. following temperatures represented the surface temperatures except for special description. Keywords: deterioration; doi; feldspar; granite; group; heating; irradiation; microwave; rock; temperature
• Numerical simulation of frozen wall formation in water-saturated rock mass by solving the Darcy-Stefan problem by Semin, Mikhail; Levin, Lev (2019) - In [10], a thermo-hydraulic model of fluid-saturated rock mass was used to analyze how the heterogeneity of rock mass properties affects the formation of a frozen wall. The groundwater velocity is calculated from the Darcy’s law: r l l l k k p     v (4) where rk is the water relative permeability; k is the absolute permeability of rock mass, m2; l is the dynamic viscosity of groundwater, Pas; lp is the hydrostatic pressure in the pore space, Pa. Keywords: doi; freezing; groundwater; heat; mass; rock; rock mass; t t; temperature; wall; water
• Numerical simulation of subsurface defect identification by pulsed thermography and improvement of this technique for noisy data by Plekhov, Oleg; Kostina, Anastasiya; Aizikovich, Sergey (2019) - Temperature contrast depends on the size of the specific defect and its depth and usually susceptible to the surface noise induced by non-uniform heating, variation of emissivity and reflections from the environment Figure 3: Temperature contrast for defects of various sizes located at the depth of 1.13 mm from the surface. Keywords: contrast; defect; doi; fig; heating; k k; noise; signal; temperature; temperature contrast; thermography; time; value
• Structural failure process of schistosity rock under microwave radiation at high temperatures by He, Leping; Gu, Yucheng; Hu, Qijun; Chen, Yuan; Zeng, Junsen (2019) - Investigating microwave assisted rock breakage for possible space mining applications, Min. Technol., 115(1), pp. The effects of high temperature induced by microwave radiation on the schistosity structural rock were investigated. Keywords: area; cracks; dark; eng; granite; microwave; minerals; radiation; rock; schistosity; temperature
• Damage and failure of Orban’s gun during the bombardment of Constantinople walls in 1453 by Kakaliagos, Aristotle; Ninis, Nikolaos (2019) - Admittedly, powder chamber internal pressure as result of gunpowder ignition is also function of powder chamber volume and propellant characteristics (Culver [10]). Additionally, Orban gun dimensions were cross checked using the contemporary to the Siege gun classification system proposed by Francesco Giorgio Martini [7]. Keywords: bombard; breech; cannonball; chamber; cylinder; effect; gun; gunpowder; internal; mpa; orban; powder chamber; pressure; projectile; stress; stresses; surface; table; temperature; time; velocity; wall
• Study on the thermal cycle of Wire Arc Additive Manufactured (WAAM) carbon steel wall using numerical simulation by Saadatmand, Mohsen; Talemi, Reza (2020) - Figure 5: The peak temperature of middle point in the first layer for travel speed of 10 ,12.5 and 15 mm/s M. Saadatmand et alii, Frattura ed Integrità Strutturale, 52 (2020) 98-104; DOI: 10.3221/IGF-ESIS.52.08 103 Effect of travel speed on thermal cycle of deposited layers The temperature distributions of p1 with different travel speeds are shown in Fig. Moreover, with the increase of substrate’s preheating temperature, the peak temperature of first layer increases (from 2518℃ to 2600℃). Keywords: doi; heat; layer; process; speed; substrate; temperature; waam
• Physical Parameters of Polymer Composite Materials Created on the Basis of Low and High Molecular Weight Rubbers by Nurullaev, E.; Lyubimova, N. Y. ; Gertsen, T. A. (2020) - The first term corresponds to the case of elasticity theory of cross-linked rubbers (resins) at a test temperature close to the equilibrium one: T∞=Tg +2000 (Tg is the temperature of structural glass transition of a polymer). In contrast to the “traditional” effect of the test temperature on the type of tensile curves of polymer composites in the highly elastic region of the thermomechanical curve (Fig. 3), a composite based on a high molecular weight copolymer with decreasing temperature becomes more and more elastic. Keywords: composite; doi; elastomer; nurullaev; polymer; rubbers; temperature; weight
• Evaluating Properties of Asphalt Mixtures Containing polymers of Styrene Butadiene Rubber (SBR) and recycled Polyethylene Terephthalate (rPET) against Failures Caused by Rutting, Moisture and Fatigue by Ameri, Mahmoud; Mohammadi, Reza; Mousavinezhad, Milad; Ameri, Amirhossein; Shaker, Hamid; Fasihpour, Arash (2020) - In flexible pavements, asphalt concrete surface layer consists of asphalt binder, aggregates and in some cases additives. Therefore, asphalt pavement distresses such as permanent deformation and thermal cracking are related to the quality of asphalt binder utilized in asphalt mixtures Keywords: asphalt; astm; binder; bitumen; materials; mixture; polymers; properties; results; rpet; sbr; temperature; test
• Fatigue Analysis of Bitumen Modified with Composite of Nano-SiO2 and Styrene Butadiene Styrene Polymer by Rezaei, Sajad; Damadi, Seyed Mohsen; Edrisi, Ali; Fakhri, Mansour; Khordehbinan, Mohammad Worya (2020) - On this basis and in order to perform all the tests, 1 kg from each of the samples was prepared including the base bitumen, compound of bitumen and SBS polymer as 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and, 6 wt% of the bitumen and the threefold compound of bitumen, SBS polymer with constant 4.5 wt% of bitumen and nano-SiO2 with 1, 2, 3, 4 and, 5 wt% of bitumen, which resulted in preparation of 1 samples of base bitumen, 8 samples of polymeric bitumen and 5 samples of nano polymeric bitumen. Composition wt.% Saturates 8.1 Naphthene-aromatics 48.9 Polar-aromatics 30.8 Asphaltenes 12.2 Table 1: Chemical composition of base bitumen. Keywords: base; bitumen; doi; modulus; nano; polymer; sbs; sio2; temperature
• Age hardening heat treatment behavior of as-cast Mg–Zn–Al alloys by Patil, Hiralal S.; Patel, D. C. (2021) - Suppression of ignition and burning of molten Mg alloys by Ca bearing stable oxide film, Journal of Materials Science Letters, 16(12), pp. 1048 1050. RESULTS AND DISCUSSION Microstructure Analysis he optical micrographs of permanent mould as cast ZA85 alloy is represented in Fig. Keywords: alloy; cast; solution; temperature; time; za85
• Tribological performance and corrosion behavior of CoCrMo alloy by Rezzag, Hadda; Kahloul, Latifa; Chadli, Hacène; Mebrek, Alima; Saoudi, Adel (2021) - The effect of simulated inflammatory conditions and pH on fretting corrosion of CoCrMo alloy surfaces. The obtained results show that higher sintering temperatures have a positive impact on the tribological behavior as well as the corrosion resistance of CoCrMo alloys. Keywords: alloy; behavior; cocrmo; cocrmo alloy; corrosion; doi; friction; resistance; samples; sintering; surface; temperature; wear
• Recycling of plastic waste polyethylene terephthalate (PET) as a modifier in asphalt mixture: study of Creep-Recovery at Low, Medium, and Hot Temperatures by Bekhedda, Amine; Merbouh, M’hammed (2022) - In general, waste PET modified asphalt mixture with coarser PET size showed comparatively superior performance than fine size for all percentages at different test temperatures. In this study, PET waste was used as an additive for hot mix asphalt at two sizes (2.50 to 1.25 mm, and 0.315 to 0.160 mm) and three contents (3%, 5%, and 7% by weight of binder), PET modified mixes creep-recovery behavior was tested by four points bending test and compared with control mix (without PET waste) at three different temperatures (0°, 25° and 50°C), were added directly to the mixture as the method of dry process. Keywords: asphalt; bitumen; creep; deformation; doi; mixture; pet; plastic; recovery; temperature; waste
• Influence of Free Ferrite on the Mechanical Properties of High Strength Intercritical Austempered Ductile Iron by Basso, Alejandro Daniel; Caldera, Martin ; Tenaglia, Nicolás Emanuel; Fernandino, Diego; Boeri, Roberto Enrique (2022) - 5 shows the advance of ferrite precipitation for different intercritical temperatures and times. Microsoft Word - numero_61_art_35_3619.docx A.D. Basso et alii, Frattura ed Integrità Strutturale, 61 (2022) 519-529; DOI: 10.3221/IGF-ESIS.61.35 519 Influence of free ferrite on the mechanical properties of high strength intercritical Austempered Ductile Iron A. D. Basso, M. Caldera, N. E. Tenaglia, D. O. Fernandino, R. E. Boeri INTEMA, Universidad Nacional de Mar del Plata-CONICET, Av. Keywords: austenite; basso; ductile; ferrite; heat; iadi; microstructures; properties; samples; temperature
• Coating by the Cold Spray Process: a state of the art by Ghelichi, Ramin; Guagliano, Mario (2013) - A brief description of cold spray coating process is presented. http://dx.medra.org/10.3221/IGF-ESIS.08.03&auth=true http://www.gruppofrattura.it R. Ghelichi et alii, Frattura ed Integrità Strutturale, 8 (2009) 30-44; DOI: 10.3221/IGF-ESIS.08.03 41 THE EFFECT OF CGDS ON SUBSTRATE PROPERTIES he effect cold spray coating process on many substrate properties specially the fatigue behavior was studied by many authors. Keywords: bond; coating; cold; deposition; effect; materials; particle; process; spray; spraying; substrate; surface; technology; temperature; thermal; velocity
• High carbon steel/Inconel 718 bimetallic parts produced via Fused Filament Fabrication and Sintering by Ferro, Paolo; Fabrizi, Alberto; Bonollo, Franco; Elsayed, H.S.A.; Berto, Filippo; Savio, Gianpaolo (2023) - Due to a difference in densification kinetics, sintering temperature was revealed to be the most critical process parameter to optimize to minimize porosity. Finally, different sintering temperatures were tested, finding 1280 °C (holding time, 4h) the best one in term of material densification (>97%). Keywords: doi; fig; hcs; in718; metal; parts; sintering; temperature
• The Impact of nanoparticles (B4C-Al2O3) on mechanical, wear, fracture behavior and machining properties of formwork grade Al7075 composites by Prakash, T. B.; Gangadharappa, M.; Somashekar, Santhosh; Ravikumar, M. (2024) - The effects of different ceramics size and volume fraction on wear behavior of Al matrix composites (for automobile cam material), Wear, 289, pp. Microstructure and interface characteristics of B4C, SiC and Al2O3 reinforced Al matrix composites: A comparative study, J. Mater. Keywords: al2o3; b4c; composites; doi; force; machining; machining force; matrix; mmcs; nano; parameters; particles; process; temperature; values; wear

• Cyclic bend tests for the reliability evaluation of printed circuit boards under dynamic loads by Fuchs, P.F.; Major, Z. (2013) - i ults correlate was supported e test method 0.3221/IGF-ESIS. T which further mparison of th baxb ebx 1 a, the scale p e BLDT are end in the BL signs. Keywords: blcbt; bldt; board; design; drop; failure; fig; level; method; pcb; set; test
• A finite-element approach for the analysis of pin-bearing failure of composite laminates by Marino, Michele; Nerilli, Francesca; Vairo, Giuseppe (2014) - Proposed results seems to suggest that failure criteria accounting for micro-structural stress-strain localization mechanisms (for instance, Huang’s criterion) give a more accurate estimate in terms of pin-bearing failure load. KEYWORDS. RESULTS otem and Huang failure criteria are compared in Fig. Keywords: bearing; failure; fiber; laminate; matrix; pin; plate
• Meso-mechanics simulation analysis of microwave-assisted mineral liberation by Like, Qin; Jun, Dai; Liqun, Yuan (2015) - It analyzes the process and law of mineral boundary failure under microwave irradiation, and assesses the effects of four factors, namely, microwave irradiation time, power density, mineral crystal size, and mineral content, on mineral boundary failure. Thus, this study takes rock grains with galena and calcite as the research object to investigate the distribution and evolution characteristics of mineral boundary failure under microwave irradiation using the finite difference method. Keywords: boundary; density; energy; failure; irradiation; irradiation time; microwave; mineral; power; time
• Failure analysis of dissimilar single-lap joints by Stuparu, F.A.; Apostol, D.A.; Constantinescu, D.M.; Sandu, M.; Sorohan, S. (2016) - However, a dissimilar joint (aluminium-carbon) with smaller thickness adherends succeeds to maintain the stiffness of the assembly, but its strength is diminished. In Fig. 6, for carbon adherends, it is to be noticed that for a thickness of 3 mm the stiffness is lower than for a thickness of 5 mm (which is not surprising). Keywords: adherends; adhesive; aluminium; carbon; failure; joints; lap; thickness
• 3D limit analysis of masonry pavilion domes on octagonal drum subjected to vertical loads by Anselmi, Carlalberto; Galizia, Filomena; Saetta, Eduardo (2019) - However, it should be noted that the configuration of the macro-blocks taken into consideration aimed at reproducing the main features of the crack patterns which are frequently observed on masonry domes, such as those investigated in this manuscript. Limit analysis of masonry domes subjected to horizontal loads, Protection of Historical Buildings - Prohitec 09 (edited by F.M. Mazzolani), Rome, Italy 2, pp. Keywords: analysis; anselmi; block; case; collapse; domain; dome; drum; failure; force; frattura; masonry; multiplier; ribs; strutturale; yield
• Probabilistic geotechnical engineering analysis based on first order reliability method by Belokas, Georgios (2019) - Determination of characteristic soil values by statistical methods. Characteristic shear strength values for EC7: Guidelines based on a statistical framework. Keywords: characteristic; estimate; failure; kpa; mean; sample; soil; uncertainty; values
• Fragility analysis of concrete elevated water tanks under seismic loads by Hammoum, Hocine; Aliche, Amar; Bouzelha, Karima; Aoues, Younes; Amiri, Ouali; Mehani, Youcef (2021) - In many developed and developing countries, water tanks play an important role in the water supply networks. The dynamic behavior of water tanks, Bull. Keywords: analysis; doi; failure; failure mode; failure probability; function; height; limit; probability; site; soil; state; tank; water; zone
• Mechanical behavior of unidirectional composites according different failure criteria by Deliou, Adel; Bouchouicha, Benattou (2022) - Microsoft Word - numero_60_art_03_3264.docx A. Deliou et alii, Frattura ed Integrità Strutturale, 60 (2022) 30-42; DOI: 10.3221/IGF-ESIS.60.03 30 Mechanical behavior of unidirectional composites according different failure criteria Adel Deliou University of Med Seddik Benyahia (UMSB of Jijiel), Department of Mechanical Engineering Laboratory of Materials and Reactive Systems LMSR, University Djillali, Liabes, Sidi Bel-Abbes, Algeria. del032003@yahoo.fr,adel.deliou@univ-jijel.dz, deliouadel15@gmail.com Citation: Deliou, A., Bouchouicha, B., Mechanical behavior of unidirectional composites according different failure criteria, Frattura ed Integrità Strutturale, 60 (2022) Keywords: composite; criteria; criterion; doi; failure; materials; stress; tsai

• Analysis of the causes of failure in 5Cr-1Mo pipes mounted in a preheating furnace by Borruto, Adelina; Narducci, Giovanni; Pietrosanti, Pietro (2012) - External pipe section scale – 350 X. Figure 17: SEM analysis. [7]. T http://dx.medra.org/10.3221/IGF-ESIS.20.03&auth=true http://www.gruppofrattura.it A. Borruto et alii, Frattura ed Integrità Strutturale, 20 (2012) 22-31; DOI: 10.3221/IGF-ESIS.20.03 23 An analysis of Cr-Mo steels pipes corrosion is carried out in this paper. Keywords: analysis; corrosion; crude; fig; figure; pit; scale; surface
• On the applicability of multi-surface, two-surface and non-linear kinematic hardening models in multiaxial fatigue by Meggiolaro, M.A; Castro, J.T.P.; Wu, H. (2015) - i i i M M Ms                            (5)                  (8) The calibration parameters for each surface i are the ratcheting exponent i, the multiaxial ratcheting exponent mi, the ratcheting coefficient i, and the multiaxial ratcheting coefficient i, scalar values that are listed in Tab. 1 for several popular NLK hardening models. Keywords: hardening; linear; models; mróz; multi; stress; surface; translation; yield
• Quality Control system for a hot-rolled metal surface by Mazur, I.; Koinov, T. (2016) - The experience of introduction of the system of control of quality of surface on the uninterrupted wide strip mill of hot-rolling and also its further use showed that automatic detection and classification of surface defects in the end-to-end technology of production of sheet products make it possible: to secure a provision of the requirements of consumers on the quality of the surface of the rolled metal with the submission of electronic passport; to provide 100 % control of surface of all flat bars rolled on the mill for the detection of defects of pouring and hot rolling; to provide automated systems of subsequent process stages by the information about the defects of surface of hot-rolled metal; to carry out monitoring of quality of surface in the adjacent process stages; to carry out an audit of the existing technologies of rolled metal production and develop the actions on their improvement. A presence of drops of water on the upper side of rolled metal was one more problem for the detection of surface defects on the upper side of rolled metal and also a presence of water splashes and vapor between the flat bar and upper video. Keywords: classification; control; defects; detection; metal; mill; rolling; surface; surface defects; system
• Multi-response optimization of CuZn39Pb3 brass alloy turning by implementing Grey Wolf algorithm by Fountas, Nikolaos; Koutsomichalis, Angelos; Kechagias, John; Vaxevanidis, Nikolaos (2019) - Experiment n (rpm) f (mm/rev) a (mm) Ra (μm) Rt (μm) Fc (N) 1 800 0.10 1.5 7.34 37.7 200 2 800 0.10 1.0 4.33 25.6 160 3 800 0.10 0.5 6.02 36.5 090 4 800 0.18 1.5 4.62 25.2 130 5 800 0.18 1.0 4.23 21.1 120 6 800 0.18 0.5 5.52 34.5 080 7 800 0.33 1.5 7.14 33.8 165 8 800 0.33 1.0 8.51 42.7 160 9 800 0.33 0.5 8.02 37.5 100 10 1600 0.10 1.5 1.44 13.2 160 11 1600 0.10 1.0 1.78 11.5 130 12 1600 0.10 0.5 2.03 12.4 085 13 1600 0.18 1.5 4.24 22.2 170 14 1600 0.18 1.0 3.94 19.0 150 15 1600 0.18 0.5 4.00 21.7 100 16 1600 0.33 1.5 5.13 30.7 190 17 1600 0.33 1.0 5.26 26.8 150 18 1600 0.33 0.5 5.28 28.5 110 Table 2: Cutting conditions and measured values of surface roughness parameters and main cutting force. Main cutting force seems to increase in general when using high feed rate values however when applying depth of cut equal to 1.0 mm both the second and the third feed rate levels maintain the result of Fc. Keywords: algorithm; brass; cutting; depth; machinability; optimization; parameters; roughness; surface; turning; wolf
• Effect of aggregate type on moisture susceptibility of modified cold recycled mix asphalt: evaluation by mechanical tests and Surface Free Energy method by Latifi, Hassan; Amini, Nahid (2020) - Sieve Size 1 1/4 3/4 #4 #30 #200 Lower–upper limits 100 93-97 48-52 8-12 0.5-2 Passing (%) 100 91 50 10 2 Table 4: Gradation of used RAP aggregates. Addition of Portland cement (PC) and Acrylic Polymer (AP) to the asphalt emulsion increased acid-base component of SFE asphalt emulsion. Keywords: adhesion; aggregates; asphalt; binder; doi; energy; limestone; method; mix; mixtures; moisture; rap; sfe; surface; susceptibility; water
• Exploitation of static and dynamic methods for the analysis of the mechanical nanoproperties of polymethylmetacrylate by indentation by Benaissa, Soufiane; Habibi, Samir; Semsoum, Djameleddine; Merzouk, Hassen; Mezough, Abdelnou; Boutabout, Bénali; Montagne, Alex (2021) - For low indentation penetrations of the order of (0.8 ÷ 11) nm induced by low indentation forces which vary between (9.83.10-5 ÷ 1.54.10-3) mN generate a Young's modulus which varies in the interval of (6.3 ÷ 10) GPa. Modulus; Hardness; Nanometer scale; Low indentation depths; Indentation size effect. Keywords: doi; effect; gpa; hardness; indentation; mode; modulus; pmma; results; surface
• Effect of Gaseous carburizing thermochemical treatment on tribological behavior of Ti–6Al–4V alloy by Kamel, Fedaoui; Talhi, Amar; Touhami, Mohamed Zine (2021) - When the load was 3 N, the coefficient of friction of Ti-6Al-4V alloy increased with test time in the first 15 min, then stabilized after 15 min and the coefficient of friction was kept between 0.47 and 0.53. [10]. - Researchers in materials sciences are developing new surface treatments and coatings, which allow high surface hardening and an improvement in tribological properties [11]. Keywords: alloy; carburizing; doi; friction; hardness; surface; ti-6al-4v; titanium; treatment; wear
• On local strength of a spherical vessel with pits distributed along the equator by Okulova, Daria; Almazova, Liana; Sedova, Olga; Pronina, Yulia (2022) - Therefore, assessment of the stress level in structural P http://orcid.org/0000-0001-2345-6789 https://orcid.org/0000-0001-8695-3598 https://orcid.org/0000-0001-9097-8501 https://orcid.org/0000-0003-4978-6238 https://youtu.be/IvKOhI43mXM D. Okulova et alii, Frattura ed Integrità Strutturale, 63 (2023) 80-90; DOI: 10.3221/IGF-ESIS.63.08 81 elements with corrosion defects is an important issue to prevent the abrupt failure of the structures in an aggressive environment. Many authors considered structures weakened by multiple surface defects. Keywords: corrosion; defects; doi; maximum; notch; pits; sphere; stress; surface; vessel
• Machining effects and multi-objective optimization in Inconel 718 turning with unitary and hybrid nanofluids under MQL by Chinchanikar, Satish; Kulkarni, Paresh (2024) - (11) to (15), and hybrid nanofluids, Eqns. The cutting forces are seen to be larger for unitary nanofluid in comparison to hybrid nanofluid, to decrease with an increase in cutting speed, and to increase with an increase in feed and depth of cut. Keywords: al2o3; chip; cutting; doi; forces; hybrid; inconel; machining; mql; nanofluid; optimization; parameters; surface; tool; turning; wear

• Esistenza del modo O in piastre tridimensionali con fori circolari ed ellittici soggette a modo II by Berto, F.; Marangon, C. (2013) - ple, be mate curring thro ayed by th o affrontato uova singola presente anc he per angol Tutte le ana n consideran ed by the tical and e of e II, ssed d to g, as gible The erial ough ree- o in arità che li di alisi ndo http://www.gruppofrattura.it mailto: berto@gest.unipd.it http://dx.medra.org/10.3221/IGF-ESIS.15.02&auth=true L’o trid cir KE IN tras Ne sot spe unti, grazie all rilevata nei m e al modello t legata al m ata essere for e di quest’ultim invece massi superficie libe ssore in funzio o Keywords: berto; che; del; della; fig; fori; foro; int; mode; modo; non; piastre; sono; struct; tensione; valore
• A consistency assessment of coupled cohesive zone models for mixed-mode debonding problems by Dimitri, R.; Trullo, M.; Zavarise, G.; De Lorenzis, L. (2014) - 1 1N T N N N N N P N Np d The mixed-mode relative displacement corresponding to the onset of softening is computed as 2 max max 2 2 2 ,max max max max 1 0 0 N T N m N T T N g g for g g g g g for g          (17) according to a quadratic failure criterion of the type 2 2 max max 1N T N T p p p p   Keywords: criterion; debonding; fig; g g; max; mode; n t; separation; t g; t t
• Evaluation of mixed mode (I/II) notch stress intensity factors of sharp V-notches using point substitution displacement technique by Hussain, Mirzaul Karim; Murthy, K.S.R.K. (2019) - In n n n n n n II II II II II IIn n n n n n R n n A v r G B r v G n B (2) where nA and nB are Williams’ coefficients corresponding to n -th term for mode I and mode II, respectively,  ,r denotes the polar coordinate components, I n n II II n n (3)           0 2 0 2 1 1 1 ; sin ; ( cos ) 2 2 2 I II II R R Ru A u B r v B B r G G G (4) where 0A and 0B are Williams’ coefficients corresponding to the rigid body translation and 2B is Williams’ coefficient corresponding to the rigid body rotations. Keywords: doi; ii ii; mode; notch; nsifs
• Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction by Cocchetti, Giuseppe; Rizzi, Egidio (2019) - [2 sin 2( )] 0           + + − − − + + − + = (14) 2(2 sin 2 ) 2cos2 2 sin 2 0      + − + − = (15) the latter equation leading to following symbolic solution  = ±( ): 2cos2 1 4 ( ) 2 sin 2         (1), for CCR = 0, M = 0, and can be classically represented as: ( )( ) ( ) 2 2 2 cos sin cos sin cot cot 2 2 cos sin cos sin cos sin 1 cos 2 1 cos cot H H A h h       Keywords: analysis; arch; arches; collapse; friction; h h; masonry; mode; numerical; sliding; thickness;  
• The P-h2 relationship as a function of (hf/hm) in indentation by Habibi, Samir (2022) - The calculated value of the hf/hm ratio designates the type of deformation mode under the indenter, namely the sink-in mode or the pile-up mode (see Fig. That value of 0.875 [8] is not appropriate for this case study because it does not take consider the corrections that have to be applied in order to take into account the bluntness of the indenter, the frame compliance or other factors which affect indentation response. Keywords: deformation; doi; indentation; indenter; materials; mode; modulus; pile; responses; sink
• An Investigation on the Free Vibration Behaviors of Additively Manufactured PA6 Layered Plates: Influences of Stacking Sequence, Infill Ratio, and Boundary Conditions by Maraş, Sinan; Bolat, Çağın (2025) - Vibration analysis of 3D printed plates with ANSYS The dynamic behavior of 3D printed PA6 layered plates was investigated using the finite element method implemented in ANSYS software. In the G configuration, which has a 100% infill ratio, the increase in structural stiffness is more dominant compared to the increase in density and moment of inertia, resulting in higher natural frequencies. Keywords: aspect; conditions; configurations; frequencies; infill; infill ratio; mode; pa6; plates; ratio; vibration

• Analysis on the growth of different shapes of mineral microcracks in microwave field by Like, Qin; Jun, Dai (2016) - Microcrack growth and distribution characteristics inside different shapes of ore particles, which are composed of galena and calcite under microwave irradiation, were analyzed using discrete element method to explore the effects of mineral shapes on microwave-assisted dissociation. [10] ground and floated massive copper sulfide ores in Neves-Corvo Mine after microwave irradiation and found that microwave pre-irradiation can reduce Bond’s work index of minerals by 70% and significantly increase the single separation degree of useful minerals after ore grinding. Keywords: calcite; galena; growth; irradiation; microcracks; microwave; minerals; number; ore; shapes; time

• Transverse strength of railway tracks: part 3. Multiple scenarios test field by De Iorio, Antonio; Penta, Francesco; Pucillo, Giovanni Pio; Rosiello, Vincenzo; Lisi, Stefano; Rossi, Stefano; Testa, Mario (2014) - Ballast resistance; Track stability; Full scale test; CWR track; Railway track; Railway scenarios simulation; Test field. [10] Esveld, C., A better understanding of continuous welded rail track, Rail Engineering International Edition, 4 (1996). Keywords: ballast; r f; resistance; rfi; scenarios; sleeper; test; track
• Forming Process Analysis of an AA6060 Aluminum Vessel by Giuliano, Gillo; Bellini, Costanzo; Sorrentino, Luca; Turchetta, Sandro (2018) - Figure 1: Typical FLC for sheet metal. Determination of forming limit diagrams of sheet materials with a hybrid experimental-numerical approach, Int. Keywords: conditions; curve; doi; fig; flc; forming; process; punch; sheet; test
• Analytical and numerical study of the stress field in a circular semi- ring under combined diametral compression and bending by Kourkoulis, Stavros K; Pasiou, Ermioni D.; Markides, Christos F. (2018) -  2 ( ) 2 2 1 2 2 2 2 1 2 2 2 22 2 1 21 2 ( ) 3 1 3 log 1 4 ( 2 ) 1 1 2 cos2 2 r u r R R R R r r R RR R                                  2 22 ( ) 1 2 2 2 22 2 1 2 1 2 ( ) 3 1 3 1 1 1 sin 2 4 ( 2 ) 2 R Rr v R R rR R                                   (17) (b) Displacements due to bending of the NCSR by couples applied to its straight edges 2 2 ( ) 2 2 1 1 2 2 2 1 2 2 1 2 2 2 2 12 1 ( ) log log3 1 1 log cos 4 ( 2 ) 2 23 3 cos 1 sin cos log R R R R u r r R R R R R r r R rR R                 Keywords: csr; cut; field; fig; numerical; r r; r rr; stress; tensile; test
• Friction influence on the AA6060 aluminium alloy formability by Bellini, Costanzo; Giuliano, Gillo; Sorrentino, Luca (2019) - Figure 4: Deformation paths followed in different friction conditions and FLC relevant to the AA6060 aluminium alloy represented in the positive half-plane. Formability prediction of aluminum sheet alloys under isothermal forming conditions, J. Manuf. Keywords: aluminium; coefficient; condition; doi; flc; forming; friction; metal; sheet; test
• Railway overhead contact wire monitoring system by means of FBG sensors by Ciro Zuleta, Erwin; Lupi, Carla ; Felli, Ferdinando; Paris, Claudio ; Vendittozzi , Cristian (2021) - One of the main ways to keep safe facilities (buildings, bridges, railways, etc.) involves the use of monitoring sensor systems in charge of measuring critical operating conditions. Figure 4: a) SC1; b) detail of the FBG bonded on SC1 copper clamp. Keywords: contact; copper; doi; fbg; fiber; fig; ocw; sc1; sc2; system; test; wire
• Corrosion behavior of Shape Memory Alloy in NaCl environment and recovery maintenance in Cu-Zn-Al sysytem by Brotzu, Andrea; De Filippo, Barbara; Natali, Stefano; Zortea, Laura (2022) - -111 5.8 E-07 -132 1.8 E-07 -149 5.5 E-07 0.35 -201 -206 2.61 E-06 -190 2.3 E-06 -192 2.5 E-06 3.5 -236(600s) -222 2.23 E-06 -212 2.7 E-06 -210 3.7 E-06 Table 3: Comparison between different corrosion tests. A review on shape memory alloys with applications to morphing aircraft, Smart Mater. Keywords: alloy; corrosion; deformation; memory; plunger; shape; shift; test
• A method and apparatus for inspecting large flat composite parts by using the Infrared LST technique by Vavilov, Vladimir; Chulkov, Arsenii; Nesteruk, Denis; Burleigh, Douglas; Moskovchenko, Alexey (2022) - 10 shows the map of defect depths and Tab. 6 shows the retrieved values of defect depths in this sample. This allowed the determination of defect depth with an accuracy of 6 to 31%. Keywords: chulkov; defect; depth; doi; heating; inspection; lst; sample; test; testing; thermography; time

• Mechanical characterization of basalt woven fabric composites: numerical and experimental investigation by Valentino, Piergiorgio; Sgambitterra, Emanuele; Furgiuele, Franco; Romano, Marco; Ehrlich, Ingo; Gebbeken, Norbert (2014) - Therefore the FE-method can be considered an adequate way to predict the stiffness of woven fabric composite with different geometries in the mesoscopic scale or even different kind of fibre reinforcement. Microsoft Word - numero_28_art_1 P. Valentino et alii, Frattura ed Integrità Strutturale, 28 (2014) 1-11; DOI: 10.3221/IGF-ESIS.28.01 1 Mechanical characterization of basalt woven fabric composites: numerical and experimental investigation Piergiorgio Valentino, Emanuele Sgambitterra, Franco Furgiuele University of Calabria, Department of Mechanical, Energy and Management Engineering, Ponte P. Bucci, 44C, 87036 Keywords: composite; fabric; fibre; fill; matrix; modulus; order; properties; rve; twill; volume; warp; weave; yarns
• Effect of weld parameter on mechanical and metallurgical properties of dissimilar joints AA6082–AA6061 in T6 condition produced by FSW by Patil, H. S.; Soman, S. N. (2013) - Material of FSW Joint YS (N/mm2) UTS (N/mm2) % Elongation % Joint Efficiency 6082T6-6061T6 167 183 5.14 50.13-49.03 6082T6-6061T6 101 170 4 46.57-45.57 6061T6-6082T6 91 173 4.29 47.39-46.38 6061T6-6082T6 95 154 4.43 42.19-41.28 AA6082-T6 117 365 14 -- AA6061-T6 99.84 373.12 16.56 -- Table 4: Mechanical properties of dissimilar FSW joints. Square butt joint configuration was prepared to fabricate FSW joints. Keywords: aa6061; aa6082; corrosion; fsw; joints; min; properties; speed; tool; welding
• Characterization and Tensile Fractography of Nano ZrO2 Reinforced Copper-Zinc Alloy Composites by Nagaral, Madeva; Nayak, Prasad H.; Srinivas, H. K.; Auradi, V. (2019) - Figure 3: Showing the hardness of as cast copper-zinc alloy and nano ZrO2 composites TENSILE BEHAVIOR ig. 4 and 5 demonstrating the tensile properties of copper-zinc combination and copper-zinc-4, 8 and 12 wt. % nano ZrO2 composite. The fractured surfaces of copper-zinc along with 12 wt. % of nano ZrO2 composite resulted from tension tests, are shown in fig. Keywords: alloy; composites; copper; metal; nano; nano zro2; particulates; properties; zinc; zro2
• Effect of protective coatings on the water absorption and mechanical properties of 3D printed PLA by Vicente, Carlos; Fernandes, João; Deus, Augusto; Vaz, Maria; Leite, Marco; Reis, Luis (2019) - The presented results contribute to fulfill the lack of data which users of FDM printers face when projecting with PLA, contributing to stablish a better balance between strength and ductility/toughness on FDM PLA parts and broadening the scope of application of this environment– friendly material. Water absorption samples consists on coated and uncoated cubes with dimensions of approximately 10 mm, which were fabricated with the printing parameters of Tab. Keywords: absorption; coatings; doi; fdm; parts; pla; printing; process; properties; samples; water; water absorption
• Numerical-Experimental characterization of honeycomb sandwich panel and numerical modal analysis of implemented delamination by BENDADA, AYA; Boutchicha, Djilali; Chouiter, Adel; Miri, Mokhtaria (2019) - Homogenized elastic properties of honeycomb sandwich panels with skin effect, Journal Solids and Structures, 39, pp.2153–2188. Parameter identification for aluminum honeycomb sandwich panels based on orthotropic Timoshenko beam theory, Journal Sound Vibration, 208 (2), pp.271–287. Keywords: analysis; core; honeycomb; mm; modal; numerical; parameters; properties; results; sandwich
• Three-dimensional Numerical Analysis of a Joint Bonded Reinforced with Silica Nanoparticles (SiO2) by Djebbar, Noureddine; Hadj Boulenouar, Rachid; Boutabout, Benali (2020) - It is noted that whatever the percentage of silica nanoparticles, the difference between the maximum strains, which correspond to different diameters of Silica nanoparticles, is relatively weak. Microsoft Word - numero_52_art_11_2678 R. Hadj Boulenouar et alii, Frattura ed Integrità Strutturale, 52 (2020) 128-136; DOI: 10.3221/IGF-ESIS.52.11 128 Three-dimensional numerical analysis of a joint bonded reinforced with silica nanoparticles (SiO2) Keywords: adhesive; epoxy; joint; nanocomposites; nanoparticles; polymer; properties; rate; resin; silica; stress
• Experimental Analysis of the Physical Degradation of Polymers – The Case of Polymethyl Methacrylate by Kaddouri, Afaf; Serier, Boualem; Kaddouri, Khacem; Belhouari, Mohamed (2020) - Surface modification and ageing of PMMA polymer by oxygen plasma treatment, Journal of vacuum. 6 (86), pp.634-637. The breaking of the macromolecular chain is responsible for the deterioration of PMMA properties; For longer ultraviolet radiation exposure times (beyond thirty-six months), the linear mechanical behavior of the non- irradiated PMMA changes to a non-linear behavior, with greater deformations as compared to the non-irradiated polymer; The modulus of Young of the PMMA drops sharply during the first six months of exposure to artificial (UV) lamp radiation then starts decreasing slowly during the following six months. Keywords: aging; behavior; degradation; doi; drinking; exposure; fig; immersion; journal; months; pmma; polymer; properties; radiations; seawater; solar; tensile; water
• Forecasting bearing capacity of the mixed soil using artificial neural networking by Namdar, Abdoullah (2020) - Increasing optimum moisture content of the soil causes the reduction of density, cohesive and internal angle of friction of mixed soil, resulting in a reduction of soil safe bearing capacity. It is needed to find an effect of each mechanical properties on mixed soil safe bearing capacity and to present guidelines to find the best decision. Keywords: bearing capacity; doi; foundation; igf; mixture; moisture; prediction; properties; soil
• On the effect of stiffness/softness and morphology of interphase phase on the effective elastic properties of three-phase composite material by Kamel, Fedaoui; Baroura, Lazhar; Arar, Karim; Amrani, Hichem ; Boutaani , Mohamed said (2020) - K. Fedaoui et alii, Frattura ed Integrità Strutturale, 55 (2021) 36-49; DOI: 10.3221/IGF-ESIS.55.03 41 Effect of interphase volume fraction Figs. 8, 9, 10, 11, 12, 13 and 14 plots the ratio in Young’s modulus and shear modulus as a function of the interphase Young’s modulus ranging from 0,1 to 10. The expression is given by:        1 inter inc inter inc mat P P P (14)    1 inter inc inter inc mat P P P E E E E (15) T K. Fedaoui et alii, Frattura ed Integrità Strutturale, 55 (2021) 36-49; DOI: 10.3221/IGF-ESIS.55.03 38 Figure 3: von Misses stress and shear ratio for the case of 10 % as a function of unit cell length for different mesh density ellipsoid interphase morphology (case 10% case 2) Mean-field (MF) homogenization techniques [40, 41] describe the composite rheological behavior based on the average stress and strain tensors on phase level and composite level. Keywords: case; composite; doi; interphase; interphase morphology; matrix; modulus; morphology; properties; stress; volume; young
• Study of the Influence of Alloying Elements on the Mechanical Characteristics and Wear Behavior of a Ductile Cast Iron by Boulifa, Iliasse; Hadji, Ali (2021) - The chemical composition analysis of the unalloyed (base metal) and alloyed cast irons was determined using a fluorescence spectrometer X. Figure 2: Microstructures of alloyed cast iron in the cast condition. Keywords: alloying; cast; cast iron; doi; ductile; elements; graphite; iron; properties; resistance; wear
• Fractographic characterization of Al2O3p particulates reinforced Al2014 alloy composites subjected to tensile loading by Bharath, V.; Auradi, V.; Nagaral, Madeva (2021) - Mechanical behavior of particle reinforced metal matrix composites. Mechanical behavior of particle reinforced metal matrix composites. Keywords: al2014; al2o3p; alloy; alumina; composites; fig; matrix; particles; properties; weight
• Microstructure and Mechanical Properties of Aluminum Cast Alloy A356 reinforced with Dual-Size B4C Particles by Chandrashekar, J. R. ; Annaiah, M. H.; Chandrashekar, R. (2021) - This may be due to the higher ratio of coarse size B4C particle. and also a significant increase due to the higher ratio of coarse size B4C particle in the composites. Keywords: a356; alloy; b4c; composites; doi; hardness; particle; properties; size
• Synthesis and Characterization of Fe2O3 Nanoparticles Reinforced to Recycled Industrial Aluminium Scrap & Waste Aluminium Beverage Cans for Preparing Metal Matrix Nanocomposites by Chate, Ganesh R.; Kulkarni, Raviraj M.; Gowdru Chandrashekarappa, Manjunath Patel; Lakshmikanthan, Avinash; Harsha, H.M.; Tophakhane, Simran; Shaikh, Nazafali; Kongi, Suman; Iranavar, Pouravi (2022) - Optimization techniques applied to machinability studies for turning aluminium metal matrix composites: A literature review, Mater. Microsoft Word - numero_60_art_16_3418.docx G. R. Chate et alii, Frattura ed Integrità Strutturale, 60 (2022) 229-242; DOI: 10.3221/IGF-ESIS.60.16 229 Synthesis and characterization of Fe2O3 nanoparticles reinforced to recycled industrial aluminium scrap & waste aluminium beverage cans for preparing metal matrix nanocomposites Ganesh R. Chate Department of Mechanical Engineering, KLS Gogte Institute of Technology, Affiliated to Visvesvaraya Technological University Belagavi, Karnataka, India ganeshchate@git.edu, https://orcid.org/0000-0001-7735-3566 Raviraj M. Kulkarni Center for Nanoscience and Nanotechnology, KLS Gogte Institute of Technology, Belagavi Affiliated to Visvesvaraya Technological University Belagavi, Karnataka, India. ravirajmk@git.edu, https://orcid.org/0000-0001-6894-6888 Manjunath Patel G. C. Department of Mechanical Engineering, PES Institute of Technology & Management, Shivamogga, Affiliated to Visvesvaraya Technological University Belagavi, Karnataka, India. Keywords: aluminium; cast; composites; doi; fe2o3; fig; hardness; matrix; metal; nanoparticles; properties; scrap
• Influence of Pr6O11 addition on structural and magnetic properties of mechanically alloyed Fe65Co35 nanoparticles by Djellal, Nacira; Mekki, Djamel eddine; Navarro, Elena ; Marin, Pilar (2022) - The determination of magnetic properties, at room temperature, of the powders was obtained using Quantum Design Physical Property Measurement System option Vibrating Sample Magnetometer. For this purpose, the study of the simultaneous effects of these parameters on Fe65Co35 and (Fe65Co35)95(Pr6O11)5 magnetic properties has been undertaken. Keywords: alloying; alloys; doi; fe65co35; fe65co35)95(pr6o11)5; fig; magnetic; mater; milling; particles; powders; properties; size
• Fabrication, Mechanical and Wear Properties of Aluminum (Al6061)-Silicon Carbide-Graphite Hybrid Metal Matrix Composites by Gouda, Shivakumar; Veeresh Kumar, G. B.; Pramod, R.; Prasanna, N. D.; Balasubramanya, H. S.; Aradhya, S. M. (2022) - Mechanisms in turning of metal matrix composites: a review, Journal of Materials Research and Technology, 4(2) pp.197-207.DOI: 10.1016/j.jmrt.2014.10.013. Wear studies on metal matrix composites - Taguchi approach, Journal of Mat Sci and Technology, 21(6), pp.845-850. Keywords: al6061; alloy; composites; doi; g.b; hardness; hmmcs; kumar; matrix; properties; reinforcement; sic; sliding; veeresh; wear
• High Entropy Cantor Alloys (HEAs) modification induced by tungsten alligation, heat treatment and deep cold plastic deformation by Brotzu, Andrea; Natali, Stefano; Laura, Zortea; Barbara, De Filippo (2022) - Several combinations of these elements can develop high entropy alloys characterized by simple monophasic structures (usually face centred cubic crystals) and very promising mechanical properties (high strength and high ductility). A critical review of high entropy alloys and related concepts, Acta Materialia 122, pp. Keywords: alloys; cantor; cast; doi; entropy; grain; heas; heat; high; properties; sample; type
• Microstructure Characterization, Mechanical and Wear Behavior of Silicon Carbide and Neem Leaf Powder Reinforced AL7075 Alloy hybrid MMC’s. by Hatti, Gururaj; Lakshmikanthan, Avinash; Naveen, G. J. (2023) - Casting of SiC reinforced metal matrix composites, J. Mater. Aluminium matrix composites: Challenges and opportunities. Keywords: al7075; alloy; aluminium; composites; doi; hybrid; matrix; metal; neem; nlp; particles; powder; properties; sic; wear

• Current state of existing project risk modeling and analysis methods with focus on fuzzy risk assessment – Literature Review by Rezakhani, Pejman (2012) - The rational to use FST in project risk assessment are as follows; first, the modeling of vague input is successfully done with the use of membership functions. Project risk management, which has been practiced since the mid-1980s, is one of the nine main knowledge areas of the project management institute’s project management body of knowledge Keywords: analysis; assessment; construction; engineering; journal; management; method; project; risk; system
• Considerations on the choice of experimental parameters in residual stress measurements by hole-drilling and ESPI by Barile, C.; Casavola, C.; Pappalettera, G.; Pappalettere, C. (2014) - Microsoft Word - numero_30_art_27 C. Barile et alii, Frattura ed Integrità Strutturale, 30 (2014) 211-219; DOI: 10.3221/IGF-ESIS.30.27 211 Focussed on: Fracture and Structural Integrity related Issues Considerations on the choice of experimental parameters in residual stress measurements by hole-drilling and ESPI C. Barile, C. Casavola, G. Pappalettera, C. Pappalettere Dipartimento di Meccanica, Matematica e Management, Politecnico di Bari, viale Japigia 182, Bari, Italy claudia.barile@poliba.it ABSTRACT. [13] Pechersky M.J., Miller R.F., Vikram C.S., Residual stress measurements with laser speckle correlation interferometry and local heat treating, Opt. Keywords: analysis; drilling; hole; measurement; mpa; radius; stress; stresses; value
• Fragmentation of Mansurov granite under quasi-static compression by Davydova, Marina; Panteleev, Ivan; Naimark, Oleg (2017) - Dependence of power law exponent, D , from number of fragments per unit mass, mN , has been analyzed for five materials (quartz, 2ZrO and SiC ceramics, syminal and granite), which exhibits power law as fragment size distribution, Fig.11. Figure 11: Power law exponent of fragment size distribution for five tested materials. Keywords: analysis; davydova; distribution; doi; fragment; fragmentation; granite; mass; number; size
• Structural behaviour of masonry arch with no-horizontal springing settlement by Zampieri, P.; Simoncello, N.; Pellegrino, C. (2017) - Microsoft Word - numero_43_art_14 P. Zampieri et alii, Frattura ed Integrità Strutturale, 43 (2018) 182-190; DOI: 10.3221/IGF-ESIS.43.14 182 Structural behaviour of masonry arch with no-horizontal springing settlement P. Zampieri, N. Simoncello, C. Pellegrino Department of Civil, Environmental and Architectural Engineering, University of Padova, Via Marzolo, 9 - 35131 Padova, Italy paolo.zampieri@dicea.unipd.it, http://orcid.org/0000-0002-4556-5043 ABSTRACT. Safety of masonry arches; Collapse mechanism; Springing settlement; Experiment. Keywords: analysis; arch; collapse; configuration; displacement; doi; experimental; fig; masonry; settlement
• Effect of Contact Geometry on the Contact Stresses in a Flat with Round Edge Contact by Dhaka, Pankaj; Prakash, Raghu Vasu (2019) - While in the case of a flat punch with sharp corners, singularity is present at contact edge and asymptotic contact pressure distribution is obtained, the rounding of the corners in a flat with rounded-edge leads to contact pressure falling to zero at the edge of the contact. They proposed that the difference in contact pressure because of different contact geometry was not the contributory factor for different wear rates rather it was attributed to the effect of contact geometry on debris flow in the contact zone. Keywords: analysis; contact; doi; edge; effect; element; finite; geometry; pressure
• The role of different sliding resistances in limit analysis of hemispherical masonry domes by Mousavian, Elham; Casapulla, Claudia (2019) - Citation: Mousavian, E., Casapulla, C., The role of different sliding resistances in limit analysis of hemispherical masonry domes, Frattura ed Integrità Strutturale, 51 (2020) 336-355. According to the limit analysis approach applied to assemblages of rigid blocks, the stability of a block masonry structure is obtained when the internal forces distributed at block interfaces satisfy two physical constraints: the forces normal to the interfaces should be in compression and the forces tangential to the interfaces must be less than the interface sliding resistance, including associative Keywords: analysis; b b; blocks; doi; dome; fig; forces; hoop; interface; interlocking; j j; limit; line; masonry; thrust
• The FEA and experimental stress analysis in circular perforated plates loaded with concentrated force by Konieczny, Mateusz; Gasiak, Grzegorz; Achtelik, Henryk (2019) - Currently, there are many applications of perforated plates, e.g. in a pressure vessel, chemical apparatus (heat exchanger tube walls) This type of girders (perforated plates) can also act as mounting boards in which holes are made for various operational reasons Keywords: analysis; center; element; equivalent; finite; force; mpa; plate; stress
• Elastoplastic analysis of plane structures using improved membrane finite element with rotational DOFs: Elastoplastic analysis of plane structures by Ayadi, Ayoub; Meftah, Kamel; Sedira, Lakhdar (2020) - Introduction to nonlinear finite element analysis, Springer Science & Business Media. A frontal solution program for finite element analysis, Int. Keywords: analysis; displacement; doi; element; eng; finite; methods; node; plane; plastic; stress
• Micromodels for the in-plane failure analysis of masonry walls: Limit Analysis, FEM and FEM/DEM approaches by Pepe, Marco; Pingaro, Marco; Trovalusci, Patrizia; Reccia, Emanuele; Leonetti, Lorenzo (2019) - An efficient solution procedure for crushing failure in 3D limit analysis of masonry block structures with non-associative frictional joints, International Journal of Solids and Structures, 69– 70, pp. In detail, masonry blocks are made by bulk finite elements with linearly elastic and isotropic material properties, whereas dry joints are represented as zero-thickness damage-based cohesive interface elements placed in between, equipped with an intrinsic mixed-mode displacement-based traction-separation law (TSL). Keywords: analysis; blocks; collapse; dem; example; fem; international; journal; limit; masonry; models; results; structures
• Numerical analysis of the elastic-plastic behavior of a tubular structure in FGM under pressure and defect presence by Madani, Kouider; Houari, A.; Bouchikhi, A.S.; Mokhtari, M. (2021) -           ( ) ( ) ( ) ( ) ( )21 ( ) E r r r r rrv r                    (4.b)      ( ) ( ) ( ) ( )r v r r rz r                                (4.c) where  ( )r r ,  ( )r and  ( )z r are the radial, circumferential, and axial stresses, respectively, as a function of ( )r ,  ( )r r and  ( )r are the radial and circumferential strain, respectively, as a function of ( )r , while z is the axial strain and is assumed to be constant, taking the large length-radius ratio into consideration, and whereas ( )u r is the radial displacement as a function of ( )r and ( )w z is the axial displacement as function of length.                2 221 2eq r z r z                               (11)                          Keywords: analysis; behavior; cylinder; defect; doi; effect; fgm; metal; plastic; pressure; r r; stresses; structure; thickness
• A Simple and Efficient eight node Finite Element for Multilayer Sandwich Composite Plates Bending Behavior Analysis by Belkaid, Khmissi; Boutasseta, Nadir; Aouaichia, Hamza ; Gaagaia, Djamel Eddine; Deliou, Adel ; Boubir, Badreddine (2022) - Bending and vibration analysis of composite sandwich plates, Computers & structures, 60 (1), pp. 103-112. Bending analysis of composite sandwich plates with laminated face sheets: new finite element formulation, Journal of Solid Mechanics 8 (2), pp. Keywords: analysis; c c; doi; element; plates; sandwich; shear; theory;  

• Experimental and numerical study on mechanical properties of aluminum alloy under uniaxial tensile test by Daghfas, O.; Znaidi, A.; Ben Mohamed, A.; Nasri, R. (2016) - Recently, researches on aluminum alloy are focused on mechanical properties, texture and anisotropic behavior that give rise from processing of aluminum alloy sheet [6-7, 10-11]. Despite the importance of the work in this field, aluminum alloys continue to be the center of interests of several researches in materials science. Keywords: alloy; aluminum; anisotropy; behavior; daghfas; direction; experimental; hardening; plastic; tensile
• Numerical Analysis and Verification of Residual Stress in T Joint of S355 Steel by Wang, Xiangming; Guo, Erfu (2020) - Microsoft Word - numero_52_art_03_2468 W. Xiangming et alii, Frattura ed Integrità Strutturale, 52 (2020) 25-32; DOI: 10.3221/IGF-ESIS.52.03 25 Numerical analysis and verification of residual stress in T joint of S355 steel Wang Xiangming, Guo Erfu School of Mechanical and Electrical Engineering, Shijiazhuang University of Applied Technology, Shijiazhuang, 050081 wangxmxming@163.com ABSTRACT. The welding deformation and residual stress produced during the welding process affect the integrity and reliability of the resultant structure. Keywords: heat; joint; peak; simulation; source; stress; tensile; transverse; weld; welding
• Corrosion’s impact on wire rope strand response – Comparison with a theoretical predictive model by TIJANI, Amal; Meknassi, Meryam; Chaffoui, Hassan; El Ghorba, Mohamed (2019) - Wire rope general information Corrosive solution The objective of studying the behavior of corroded wire ropes is reminded in the ISO standard 7539 [16]: ‘’The objective of corrosion tests is, in general, to provide information faster than this obtained from experience in service and in the same time, to predict the behavior in service’’. Microsoft Word - numero_50_art_13_2495 A. Tijani et alii, Frattura ed Integrità Strutturale, 50 (2019) 141-148; DOI: 10.3221/IGF-ESIS.50.13 141 Corrosion’s impact on wire rope strand response – Comparison with a theoretical predictive model Amal Tijani Laboratory of Atmosphere’s Physics, materials and modeling, FST Mohammedia, Hassan II University of Casablanca, BP 146 - Mohammedia, Morocco amaltijani@gmail.com, http://orcid.org/0000-0003-4543-1253 Meryam Meknassi Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics (ENSEM), Hassan II University of Casablanca, B.P 8118 Oasis – Casablanca, Morocco Hassan Chaffoui Laboratory of Atmosphere’s Physics, materials and modeling, FST Mohammedia, Hassan II University of Casablanca, BP 146 - Mohammedia, Morocco Mohamed Elghorba Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics (ENSEM), Hassan II University of Casablanca, B.P 8118 Oasis – Casablanca, Morocco ABSTRACT Keywords: corrosion; diameter; doi; force; rope; strand; tensile; time; wire
• Mechanical behavior of materials with a compact hexagonal structure obtained by an advanced identification strategy of HCP material, AZ31B-H24 by Harbaoui, Rym; Daghfas, Olfa; Znaidi, Amna; Tuninetti, Victor (2020) - Identification strategy of anisotropic behavior laws: application to thin sheets of A5.  1 1 1 2 2 , 2 21 mm m tr cp tr cp tr cp m m tr cptr cp h k h h                       (8) k: the parameter of the material, the ratio between the uniaxial yield in traction σtr and the uniaxial yield in compression σcp allowing the description of the differential effect of resistance h: is a variable that defines the history of the material To ensure the convexity of the plasticity surface, we fix m ≥1, -1≤ k ≤1 Keywords: alloy; behavior; compression; criterion; hardening; identification; law; ludwick; magnesium; parameters; tensile
• Parametric Study Of Friction Stir Spot Welding (FSSW) For Polymer Materials Case Of High Density Polyethylene Sheets: Experimental And Numerical Study by Benyerou, Djilali; Ould Chikh, El Bahri; Khellafi, Habib; Meddah, Hadj Miloud; Benhamena, Ali; Hachelaf, Kaddour; Lounis, Abdellah (2020) - In the same subject, Bilici and his co-authors [32-35], presented interesting experimental results on friction stir spot welding of thermoplastics. According to Thomas and Nicholas [10] and Mishra and Ma [11], friction welding is part of a new generation of welding processes, which was recently developed with the ability to weld high-strength aluminum alloys, which are difficult to be welded by fusion welding process. Keywords: doi; dwell; friction; fssw; joint; parameters; process; speed; spot; stir; tensile; time; tool; welding
• Effect of addition of different reinforcements on the microstructure and mechanical characterization of the Al-Flyash composites by Wasekar, Milind K.; Khond, Mohan P. (2021) - Figure 6: Tensile strength of hybrid aluminum matrix composites. Mechanical properties, tensile fracture behavior of aluminum matrix composites with Graphite [10-11], Fly ash Keywords: al6061; aluminum; composites; flyash; hybrid; mos2; sic; tensile
• Optimization of the Mechanical Property of Friction Stir Welded Heat Treatable Aluminum Alloy by using Bio-Inspired Artificial Intelligence Algorithms by Mishra, Akshansh; Dasgupta, Anish (2022) - INTRODUCTION revolving tool generates frictional heat during friction stir welding (FSW), a solid-state joining technique that is used to fuse materials. Polyphenylene sulfide (PPS) and aluminum alloy 7475 sheets were attached together using friction stir welding (FSW) in a lap joint configuration. Keywords: friction; machine; optimization; process; sample; stir; tensile; tool; vector; welding
• Influence of Internal Technological Defects on the Mechanical Properties of Structural CFRP by Lobanov, Dmitriy; Slovikov, Stanislav; Lunegova, Ekaterina (2023) - Figure 5: Typical deformation diagrams of carbon fiber samples without defects and with internal defects: without defects – black line; layer buckling defect – green line; glueline defect circle shape – blue line; glueline defect square shape – grey line; glueline defect rectangle shape – red line Fig. During the production of structural carbon-fiber composites and related products, different defects may occur, such as glueline defects, buckling, cracks, delaminations, chips, scratches, porosity, reinforcement scheme irregularities, deviations from the optimal polymerization regime and the nominal density of a binding agent. Keywords: buckling; carbon; composite; defect; doi; fiber; fig; glueline; layer; lobanov; samples; shape; system; tensile

• Electro-mechanical coupled design of self-powered sensing systems and performances comparison through experiments by Somà, A.; De Pasquale, G. B. (2012) - This paper reports the research advances in this field as a result of laboratory tests and design studies, with particular focus on the design methodologies involved in the definition of energy harvesters. Energy harvesters will allow using, for example, wireless sensors in many applications such as industrial and structural monitoring, remote medical assistance, military equipments, materials flows monitoring, transports and logistics, energetic efficiency control. Keywords: design; energy; frequency; generator; harvester; magnetic; piezoelectric; power; somà
• Development of a piezoelectric energy-harvesting sensor: from concept to reality by Gkoumas, Konstantinos; Bontempi, Franco (2018) - A temperature differential is necessary Artificial light is necessary Table 2: Energy harvesting sensor comparison. Piezoelectric energy harvesting from vortex shedding and galloping induced vibrations inside HVAC ducts Energy and Buildings 158, pp. Keywords: design; development; energy; engineering; gkoumas; harvesting; hvac; numerical; piezoelectric; project; sensor; systems; wind
• Response of fabric insert injection overmolding PP based composites subjected to single and muti-impact: Impact response of fabric insert injection overmolding PP based composites by Ferreira, José António Martins; Febra, Tiago; Costa, José; Capela, Carlos (2019) - On low energy impacts, the effect of the insert fibre and of the previous impact are quite reduced, while for impact energies above 6J, previous impacts reduce significantly the recovered energy and the impact energy for which the perforation was achieved. KEYWORDS. 3a) presents the average values of three tests for each condition of the recovered energy versus impact energy, showing that biaxial glass fiber netting insert promotes the highest values of recovered energy, contrary to what happens with multiaxial glass fiber mesh insert which was observed as having a lower perforation energy. Keywords: composites; doi; energy; fibre; glass; impact; impact energy; insert; mat; response; tests
• Imaging performance of a CaWO4/CMOS sensor by Martini, Niki; Koukou, Vaia; Fountos, George; Valais, Ioannis; Kandarakis, Ioannis; Michail, Christos; Bakas, Athanasios; Lavdas, Eleftherios; Ninos, Konstantinos; Oikonomou, Georgia; Gogou, Lida; Panayiotakis, George (2019) - An investigation of the imaging characteristics of the Y2O2S:Eu3+ phosphor for application in X-ray detectors of Digital Mammography, Appl. Europium-activated phosphors for use in X-ray detectors of medical imaging systems, Eur. Radiol., 8, pp. Keywords: cawo4; cmos; energy; fountos; imaging; kandarakis; martini; michail; mtf; ray
• Minimum energy strategies for the in-plane behaviour of masonry by Gesualdo, Antonio; Calderoni, Bruno; Iannuzzo, Antonino; Fortunato, Antonio; Monaco, Michela (2019) - Minimum energy approach for the in-plane shear resistance of masonry panels. Seismic response of masonry plane walls: A numerical study on spandrel strength, AIP Conf. Keywords: doi; energy; gesualdo; masonry; minimum; panel; problem
• Impact behavior of gravity cast AlSi10Mg alloy: Effect of hot isostatic pressing and innovative high pressure T6 heat treatment by Girelli, Luca; Giovagnoli, Maverick; Tocci, Marialaura; Fortini, Annalisa; Gelfi, Marcello; Merlin, Mattia; Pola, Annalisa (2023) - This is the innovative under pressure T6 heat treatment (HPT6). Figure 1: Temperature-time correlation for the 3 different types of treatment: (a) hot isostatic pressing (HIP); (b) hot isostatic pressing and T6 heat treatment at atmospheric pressure (HIP+T6); (c) innovative under pressure T6 heat treatment (HPT6). Keywords: alloy; cast; condition; doi; energy; fig; heat; hip; isostatic; particles; pressing; pressure; treatment
• Crashworthiness performance of the designed concave hexagonal structures as filler element in cylindrical shell in multiple load cases by Mettanadi, Andre Hartawan; Prabowo, Aditya Rio; Kusharjanta, Bambang; Muttaqie, Teguh; Laksono, Fajar Budi; Nubli, Haris (2023) - Energy absorption, Crashworthiness, Thin-walled structures, Multi-cell, Concave hexagonal. [37] described the peak forces, Fmax, and energy absorption (EA) in a thin-walled structure subjected to axial and oblique impact forces. Keywords: absorption; crashworthiness; doi; energy; energy absorption; fig; impact; number; results; structures; thickness; value
• Investigation of Impact Energy Absorption of AA6061 and Composites: Role of Post-Aging Cooling Methods by Krishna Reddy, G.V.; Naveen Kumar, B. K.; Hareesha, G.; Rajesh, A. M.; Doddamani, Saleemsab (2023) - Furnace cooling, characterised by its controlled and gradual cooling rate, consistently contributes to higher energy absorption capacities in various cases. 261-272; DOI: 10.3221/IGF-ESIS.66.16 261 Investigation of impact energy absorption of AA6061 and its composites: role of post-aging cooling methods G. V. Krishna Reddy Department of Mechanical Engineering, Government Polytechnic, Channasandra, Bangalore, Karnataka, India. Keywords: absorption; absorption capacity; ageing; al6061; capacity; composites; cooling; doi; energy; energy absorption; furnace; graphite; impact; sic

• Performance Index of Natural Stones-GFRP Hybrid Structures by Sorrentino, Luca; Bellini, Costanzo; Polini, Wilma; Turchetta, Sandro (2018) - A performance index, considering both strength and weight of tiles, was introduced and the comparison with specimens extracted from traditional unreinforced tiles demonstrated that the considered reinforcement increases the structural characteristics of stone tiles up to an order of magnitude. KEYWORDS. Two adhesives were used to bond the self-produced composite sandwich to stone tiles: the Scotch-WeldTM EC-2216 B/A Gray of 3MTM and the Scotch-WeldTM AF163-2k of 3MTM. Keywords: af163; composite; core; diab; granite; marble; p60; stone; thickness
• Characterization of Isogrid Structure in GFRP by Bellini, Costanzo; Sorrentino, Luca (2018) - According to Wang and Abdalla, lattice composite structures have higher damage tolerance characteristics Experimental study and finite element analysis of the elastic instability of composite lattice structures for aeronautic applications, Compos. Keywords: compaction; composite; design; doi; intersection; lattice; mould; rib; stratification; structure; tape; thickness
• Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques by Ravikumar, M.; Suresh, R.; Reddappa, H. N.; Ram Mohan, Y. S.; Nagaraja, C. R.; Babu, E. R. (2021) - Microstructure and interface characteristics of B4C, SiC and Al2O3 reinforced Al matrix composites: a comparative study. Investigation of particle size and amount of alumina on microstructure and mechanical properties of Al matrix composite made by powder metallurgy. Keywords: al2o3; composite; hardness; matrix; mmcs; particulates; sic; wear
• Effects of residual stresses on interlaminar radial strength of Glass-Epoxy L-bend composite laminates by Umarfarooq, M.A.; Gouda, P. S. Shivakumar; Bharath, K. N. ; Veereshkumar, G. B.; Banapurmath, N. R.; Edacherian, Abhilash (2022) - Microsoft Word - numero_61_art_10_3403.docx M. A. Umarfarooq et alii, Frattura ed Integrità Strutturale, 61 (2022) 140-153; DOI: 10.3221/IGF-ESIS.61.10 140 Effects of residual stresses on interlaminar radial strength of Glass- Epoxy L-bend composite laminates M. A. Umarfarooq Research Centre, Department of Mechanical Engineering, SDM College of Engineering & Technology, Dharwad, Visvesvaraya Technological University, Karnataka, India. The state of residual stresses in GE laminates is varied by post- curing these laminates at different temperatures. Keywords: bend; bending; composite; curing; curved; delamination; doi; ge laminates; laminates; matrix; post; stresses; thickness
• Natural Frequency based delamination estimation in GFRP beams using RSM and ANN by Sreekanth, T. G. ; Senthilkumar, M.; Reddy, S. Manikanta (2022) - Figure 5 (a): Bending Mode 3, (b): Bending Mode 5, for delamination location at X=220, Layer-3 with delamination size of 250mm2. For different delaminated beams with varying position and size, inverse approaches such as Response Surface Methodology (RSM) and Artificial Neural Network (ANN) are utilized to address the inverse problem, which aids in the prediction of delamination size and location. Keywords: ann; composite; delamination; doi; frequencies; frequency; location; rsm; size; sreekanth; vibration
• Artificial neural network based delamination prediction in composite plates using vibration signals by Sreekanth, T. G.; Senthilkumar, M.; Manikanta Reddy, S. (2022) - The reason for overall error may be because of more complexity in plate delaminations prediction because of more number of inputs (four) to the neural network. Two hundred and twenty five distinct delamination scenarios were created numerically for this study by combining delaminations at nine different places (combinations of x = 60, 120, 180; and Y = 60, 120, 180; where x and y are distance of delaminations location from bottom left end.) Keywords: composite; delamination; doi; frequencies; layer; network; plates; sreekanth; y=60
• Influence of contact interaction character on residual stresses arising over damaged area in composite plate by Eleonsky, Sviatoslav; Pisarev, Vladimir; Matvienko, Yury; Gvozdeva , Galina (2025) - Residual stress components referred to the dimple center are of special interest. Point/ Dimple Distance from dimple center to probe hole center x/y, mm uN , fringes vN , fringes Δu , μm Δv , μm 1σ , MPa 2σ , MPa 1/A 1x = 0, 1y = 0 –17.5 –22.0 –6.65 –8.36 –208.2 –230.9 2/A 2x = 7.0, 2y = 0 –13.5 +7.5 –5.13 +2.85 –86.4 +18.5 3/A 3x = 0, 3y = 7.0 +10.0 –13.0 +3.80 –4.94 +41.4 –70.3 4/B 4x = 0, 4y = 3.7 +27.0 –20.5 +10.26 –7.79 +146.8 –77.9 5/B 5x = 3.9, 5y = 0 –23.0 +15.0 –7.03 +3.04 –140.4 +51.6 6/B 6x = 6.8, 6y = 0 –18.5 +8.0 –2.85 +2.85 –125.3 +5.9 7/B 7x = 0, 7y = 10.3 +10.0 –12.0 +3.80 –4.56 +44.4 –65.6 8/B 8x = 0, 8y = 15.8 +10.0 –4.0 +3.80 –1.52 +68.7 –2.0 Table 2: The results of fringe patterns interpretation and values of principal residual stress components near contact dimple in CP_S coupon. Keywords: component; composite; contact; coupon; dimple; doi; hole; impact; point; principal; stress; stresses; values
• Realization of introducing non-woven veil on interlaminar radial strength of Glass Epoxy L-Bend composites by Gouda, Shivakumar; Uppin, Vinayak S.; Sridhar, I.; Hatti, G.; Umarfarooq, M. A.; Muddebihal, A.; Bharath, K. N.; Edacherian, A. (2025) - Overall, the analysis confirms that low areal density carbon veils (15 – 20 g/m2) significantly enhances ILRS, whereas high areal density carbon veils (30 g/m2) reduce them, and glass veils provide only non-significant improvements. Effects of carbon/glass nonwoven interleaving veils and their areal density on opening and shearing mode interlaminar fracture toughness of glass epoxy composites, Theor. Keywords: areal; carbon; cbs; composite; density; doi; epoxy; glass; gouda; ilrs; laminates; shivakumar; veil

• An original method of direct calculation for the identification of the last hinge and the definition of the deformative state at collapse by De Salvo, Roberto Maria (2017) - It is worth to note that, being the structure six times hyper- static, at collapse the number of plastic hinges is seven. Under the hypothesis that the last plastic hinge finds at node C (Fig. 3), the rotations of plastic hinges are now summed to the rotations obtained through the impressed articulated motion (Fig. 4). Keywords: collapse; hinge; plastic; plastic hinge; rotations; verses
• A nonlinear elasto-plastic analysis of Reissner-Mindlin plates by finite element method by Meftah, Kamel; Sedira, Lakhdar (2019) - Plate element; Reissner-Mindlin plates; Elasto-plasticity; Nonlinear analysis. Finite element analysis of elasto-plastic plate bending problems using transition rectangular plate elements, Acta Mechanica Sinica 22, pp. Keywords: doi; elasto; element; finite; plastic; plate

• micromechanical approach for the micropolar modeling of heterogeneous periodic media by De Bellis, M.L.; Addessi, D. (2014) - 1 2 3 , , , , .  u X x r X x r X x r X x   (13) Thus, this appears as the best compromise between accuracy and efficiency in correctly reproducing the actual trends of perturbation fields, when a single UC is analyzed. Keywords: perturbation; procedure; results;  
• A numerical study of squeeze-film damping in MEMS-based structures including rarefaction effects by Pantano, Maria F.; Pagnotta, Leonardo; Nigro, Salvatore (2012) - In order to model fluid rarefaction, the effective viscosity approach was followed, which consists of substituting the standard fluid viscosity, contained in the equation, with a scaled term, known as effective viscosity. In particular, the standard fluid viscosity (μ), which compares into its classical formulation, is substituted with a scaled quantity, known as effective viscosity (μeff), defined as: eff PRQ   (3) Where QPR is the flow rate coefficient, computed as a function of the Knudsen number. Keywords: analytical; damping; data; film; fluid; numerical; plate; pressure; results; squeeze; viscosity
• Prediction and optimizing residual stress profile induced by cold expansion in aluminum alloys using experimental design by Miloudi, Abdelkader; Laredj, M.; Lousdad, A.; Benguediab, B. (2019) - Finite element method and experimental investigation on the residual stress fields and fatigue performance of cold expansion hole, Materials and Design, 31, pp. The main objective of this work is to establish and validate a predictive model of residual stresses generated by cold hardening. Keywords: cold; degree; doi; expansion; figure; hole; increase; results; stresses; thickness
• Acoustic Analysis Using Symmetrised Implicit Midpoint Rule by Razali, Noorhelyna; Masnoor, Nisa Balqis; Abdullah, Shahrum; Mohd Zainaphi, Muhammad Faiz Hilmi (2022) - Lax differencing (step-wave) method results for CFL=2.0 N. Razali et alii, Frattura ed Integrità Strutturale, 61 (2022) 214-229; DOI: 10.3221/IGF-ESIS.61.14 223 Figure 12: Lax differencing (step-wave) method mesh results for CFL=2.0 Both symmetrised IMR method methods, the one- and two-step active symmetrised IMR, are more efficient than the square-wave method (FTCS) and the step-wave Lax method. Keywords: figure; imr; method; numerical; results; step; wave
• A simplified constitutive model for a SEBS gel muscle simulant - Development and experimental validation for finite elements simulations of handgun and rifle ballistic impacts by Andreotti, Riccardo; Leggewri, Valentina; Casaroli, Andrea; Quercia, Mauro; Bettin, Cristian; Zanella, Mauro; Boniardi, Marco V. (2022) - Temporary cavities at escape time: experimental results at time 0.9ms (above) compared to simulation results (below) at time 1.0ms, seen from the two cross directions. Temporary cavities at escape time: experimental results at time 1.0 ms (above) compared to simulation results (below) at time 0.84 ms, seen from the two cross directions. Keywords: blocks; bullet; comparison; doi; figure; fmj; gel; impact; mm fmj; results; simulation; time

• Influence of boundary conditions on the response of multilayered plates with cohesive interfaces and delaminations using a homogenized approach by Massabò, R. (2014) - This yields: 22 22 22 ( ) ( ) ( )k k kC and 23 55 232 ( ) ( ) ( )k k kC (1a)  2222 22  ( )( ) ( )kk kA and 23 55 232  ( ) ( ) ( )k k kA (1b) with  22 22 23 32 33 ( )( ) / kk C C C C C and  22 22 21 12 11 ( )( ) / kk Keywords: displacement; interfaces; k k; plates; shear
• An analysis research of the stiffness characteristics of hospital building materials by Yunyu, Chen (2014) - For theoretical analysis purposes, the following problems arise among the computing methods for calculating the lateral layer stiffness of hospital building structures: (1) the rigidity of the structural component or lateral layer is the only parameter related to the physical and geometric characteristics of the component and its composing structure, namely once the structure takes shape it becomes the inherent characteristic of the structure itself, which is only related to its own physical geometric characteristics and has nothing to do with the external load, but both iV and i in type (1) are the calculation results determined by the lateral force, and they are inevitably related with the external load, which changes along with lateral layer rigidity Lateral layer stiffness must be the summation of the lateral rigidity of the rotational constraints on both ends considered by this group of vertical components. Keywords: calculation; component; layer; rigidity; shear; stiffness; storey
• Effect of pressure on the physical properties of magnetorheological fluids by Spaggiari, A.; Dragoni, E. (2012) - In technical literature a previous work shows that MR fluids exhibit a pressure dependency called squeeze strengthen effect. Since a lot of MR fluid based devices are rotary devices, this paper investigates the behaviour of MR fluids under pressure when a rotation is applied to shear the fluid. Keywords: effect; field; fluid; magnetic; mr fluid; pressure; shear; stress; system; torque
• Hexagrid-Voronoi transition in structural patterns for tall buildings by mele, elena; fraldi, massimiliano; Montuori, Gian Maria; perrella, gianpaolo; della vista, vincenzo (2018) - In the following, the objective and approach utilized in the paper are stated; the geometrical definition of Voronoi diagram is introduced, and the procedure for the generation of Voronoi diagrams is explained; the general methodology for the mechanical characterization and the homogenization process of structural grids is presented and applied to regular hexagrid; the additional steps required for a non-regular, Voronoi-like grid, are provided and discussed; finally a design procedure is proposed and applied to a model building, which gives the opportunity of discussing both the effectiveness of the procedure here proposed and the structural efficiency of Voronoi patterns. a) b) c) Figure 2: Voronoi patterns for tall buildings: a) “Use Arrangement” Christian Hahn eVolo 2010 Skyscraper competition entry; b) SOM competition entry for a tower in Tianjin; c) Lava Bionic Tower. Keywords: building; d d; density; design; fig; grid; hexagrid; irregularity; mele; patterns; procedure; rve; shear; stiffness; voronoi
• Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems by Grande, Ernesto; Imbimbo, Maura; Marfia, Sonia; Sacco, Elio (2018) - P p pd p c cd c e e isupport lower interface strengthening upper interface upper mortar lower mortar x E. Grande et alii, Frattura ed Integrità Strutturale, 47 (2019) 321-333; DOI: 10.3221/IGF-ESIS.47.24 325 On the basis of these assumptions it is evident that, after the attainment of the slip threshold value at the lower interface, two different parts characterize the behavior of the specimen: part “1” where the upper mortar and the interfaces are both in the pre-peak stage and part “2” where the upper mortar and the upper interface are both in the pre-peak stage while the lower interface is de-bonded for a length a, representing an unknown of the problem. Interface modeling approach for the study of the bond behavior of FRCM strengthening systems, Compos. Keywords: behavior; e e; interface; mortar; s l; s s; shear
• Numerical modeling of bending, buckling, and vibration of functionally graded beams by using a higher-order shear deformation theory by Hebbar, Nabil; Hebbar, Imène; Ouinas, Djamel; Bourada, Mohamed (2020) - The objective of this work is to analyze the behavior beams functionally graded, simply supported, under different conditions such as bending, buckling, and vibration and this by use shear deformation theories a two-dimensional (2D) and quasi-three-dimensional (quasi-3D). Static and vibration analysis of functionally graded beams using refined shear deformation theory. Keywords: beams; buckling; deformation; doi; materials; order; shear; shear deformation; theory; vibration; z z
• Analytical solution for statif bending analyses of functionally grades plates with porosities by Merdaci, Slimane; Hadj Mostefa, Adda; Beldjelili, Youcef; Merazi, Mohamed; Boutaleb, Sabrina; Hellal, Hadjira (2020) - From this work, we can say that the current and simple theory of the resolution of the mechanical behavior of porosity FGM plates that defect factories. The theory of shear deformation plates is ideal for displacements in this study:                 0 0 ( , , ) ( , ) ( ) ( , , ) ( , ) ( ) ( , , ) ( , ) ( , ) b s b s b s w w u x y z u x y z f z x x w w v x y z v x y z f z y y w x y z w x y w x y (2) Keywords: plates; porosity; shear; theory
• Free vibration analysis of the structural integrity on the porous functionally graded plates using a novel Quasi-3D hyperbolic high order shear deformation theory by Hadj Meliani, Mohammed; Kenanda, Mohammed Amine; Hammadi, Fodil; Belabed, Zakaria (2023) - Analysis of thick orthotropic laminated composite plates based on higher order shear deformation theory by the new function under thermo-mechanical loading. The mechanical properties are varied continuously through the thickness of porous FG plates using a modified power law function while considering the effect of porosities on the plate’s structural integrity. Keywords: deformation; doi; plates; shear; theory
• Optimization of damage repair with piezoelectric actuators using the Taguchi method by Shaikh, Abdul Aabid; Hriari, Meftah; Mohamed Ali, Jaffar Syed (2023) - For minimizing SIF, the lower level of PZT actuator thickness and levels 1 and 2 for adhesive thickness were selected, concerning the adhesive shear modulus, the minimum value of SIF was obtained at higher levels. The application of PZT actuators for repairing cracked structures has gained substantial attention and exploration within the research community. Keywords: aabid; actuator; adhesive; doi; method; modulus; optimization; plate; pzt; repair; shear; sif; study; thickness; value

• A unified approach for static and dynamic fracture failure in solids and granular materials by a particle method by Brighenti, Roberto; Carpinteri, Andrea; Corbari, Nicholas (2015) - Particle method; Discrete finite element; Fracture, Contact, Dynamic failure. A brief introduction related to the forces existing in continuum solids and discrete incoherent aggregates – modeled through discrete particles – is presented by taking into account the dynamic nature and large strain characteristics of the problem. Keywords: approach; force; granular; materials; method; particles; potential
• On the preparation and characterization of thin NiTi shape memory alloy wires for MEMS by Casati, Riccardo; Vedani, Maurizio; Tofail, Syed A. M.; Dikinson, Calum; Tuissi, Ausonio (2012) - Shape memory alloys; SMA; MEMS; Thin wire; Actuators; TEM. Among MEMS materials the SMA, in form of films or thin wires, are attracting a particular interest for the development of new highly functionalized devices on micro/meso scale [7-10]. Keywords: drawing; materials; mechanical; memory; shape; wire
• Alloy Substitution in a Critical Raw Materials Perspective: A systematic approach by Ferro, Paolo; Bonollo, Franco; Cruz, Sylvia (2019) - Raw material criticality in the context of classical risk assessment, Resour. For this reason, critical raw materials (CRMs) are subjected to a regular review and update. Keywords: alloy; criticality; crms; doi; european; index; indicator; materials; perspective; recycling; risk; substitution; supply; technologies; value
• The influence of sustainable reinforcing particulates on the density, hardness and corrosion resistance of AA 6063 matrix composites by Ononiwu, Ndudim; Ozoegwu, Chigbogu; Ifeanyi, Jacobs ; Nwachukwu, Victor; Akinlabi, Esther (2022) - Evaluation of particle size distribution, mechanical properties, microstructure and electrochemical studies of AA1050 / fly ash metal matrix composite. A Concise review of the effects of hybrid particulate reinforced aluminium metal matrix composites on the microstructure, density and mechanical properties. Keywords: aluminium; amcs; ash; composites; corrosion; doi; fly; materials; matrix; ononiwu; reinforcements; samples

• Study on the abrasion property of the anvil inside a hydraulic DTH hammer fitted with horizontal oriented sliders by He, Jiang-fu; Yin, Qi-lei; Yin, Kun (2017) - Working principle of hydraulic hammers with horizontal oriented slider While drilling a horizontal directional well with a hydraulic DTH hammer, the operation principle of the hydraulic hammer with horizontal oriented sliders is shown as Fig 2. The formula of abrasion theory is feasible to the wear of horizontal oriented sliders, thus the friction coefficient, applied load and the moving velocity of oriented slider were employed as the variables while in the simulation of abrasion property of the anvil with horizontal oriented slider. Keywords: abrasion; anvil; drilling; hammer; life; rate; service; sliders

• Crack of a helicopter main rotor actuator attachment: failure analysis and lessons learned by Allegrucci, L.; De Paolis, F.; Coletta, A.; Bernabei, M. (2013) - Ingrandimento: 160x - provino attaccato (Keller) Ingrandimento: 1280x - provino attaccato (Keller) http://dx.medra.org/10.3221/IGF-ESIS.26.11&auth=true http://www.gruppofrattura.it L. Allegrucci et alii, Frattura ed Integrità Strutturale, 26 (2013) 104-122; DOI: 10.3221/IGF-ESIS.26.11 115 Figura 26: Confronto tra immagine del provino accanto al foro e manuale di riferimento. la suscettibilità del materiale alla corrosione intergranulare e che hanno costituito le driving forces del meccanismo di rottura osservata. Keywords: alii; alla; allegrucci; attacchi; attacco; attachment; che; con; corrosione; dei; del; della; doi; fig; figure; frattura; http://dx.medra.org/10.3221/igf-esis.26.11&auth=true; http://www.gruppofrattura.it; integrità; nel; non; provino; rottura; sono; stress; strutturale; superficie; tipo
• Contact between the components of a knee prosthesis: numerical and experimental study by Cerniglia, D.; Ingrassia, T.; D’Acquisto, L.; Saporito, M.; Tumino, D. (2012) - mediante la teoria di Hertz e il livello di riflessione ultrasonora, registrato all’interfaccia del contatto. , il raggio medio è di 3.1 mm; per il carico di 2700 N ed angolo 30° il raggio medio è di 3.5 mm. (a) (b) Figura 14: Keywords: alii; area; carico; cerniglia; che; componente; contatto; dei; della; doi; durante; femorale; fig; figure; frattura; ginocchio; http://dx.medra.org/10.3221/igf-esis.22.07&auth=true; http://www.gruppofrattura.it; integrità; pari; polietilene; protesi; punto; sono; stato; strutturale; tra; una
• Failure evidences of reduced span bridges in case of extreme rainfalls The case of Livorno by Puppio, Marco Lucio; Novelli, Sara; Sassu, Mauro (2018) - DISCUSSION Limit states and capacity/range hile the crisis of wide span bridges fundamentally derives from structural reasons, the failure of a suitable maintenance and an inadequate concept of the structure or the pier erosion, for reduced span bridges the most frequent crisis is due to the interaction with the flow during floods [8]. The failure of small bridges in road networks plays a key role in this sense. Keywords: bridge; case; fig; figure; flow; integrità; livorno; puppio; rainfalls; span; strutturale
• Simplified FEM modelling for the collapse assessment of a masonry vault by Olmati, Pierluigi; Gkoumas, Konstantinos; Bontempi, Franco (2018) - The behavior of masonry buildings is affected by the used materials, the quality of the mortar and workmanship, the assembly, and their age. A lot of research has been carried out on the FEM (Finite Element Modelling) of masonry structures, considering the complexity arising from the fact that masonry is an anisotropic composite material Keywords: buildings; collapse; masonry; modelling; structures; strutturale; vault; wall
• Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings by Puppio, Mario Lucio; Ferrini, Martina (2019) - Microsoft Word - 2373 M. L. Puppio et alii, Frattura ed Integrità Strutturale, 48 (2019) 706-739; DOI: 10.3221/IGF-ESIS.48.66 706 Design of Civil Environmental Engineering Parametric analysis on external dissipative link system for seismic protection of low rise R.C. buildings Mario Lucio Puppio, Martina Ferrini University of Pisa, Italy mariolucio.puppio@ing.unipi.it, martina.ferrini90@gmail.com ABSTRACT. 15% 20% 25% 30% 35% 40% 45% 50% 0% 20% 40% 60% 80% 100% %Veb,x % Link Stiffness Shear at the base of the (eb) X Direction Linear Non-Linear 15% 20% 25% 30% 35% 40% 45% 50% 0% 20% 40% 60% 80% 100% %Veb,y % Link Stiffness Shear at the base of the (eb) Y Direction Linear Non-Linear 15% 20% 25% 30% 35% 40% 45% 50% 0% 20% 40% 60% 80% 100% %Veb,s % Link Stiffness Shear at the base of the (eb) %Veb,x - Non-Linear %Veb,y - Non-Linear M5 M4 M3 M1 M2 M5 M4 M3 M1 M2 M5 M4 M3 M1 M2 M. L. Puppio et alii, Frattura ed Integrità Strutturale, 48 (2019) 706-739; DOI: 10.3221/IGF-ESIS.48.66 727 Keywords: brace; bracing; case; doi; elements; fig; figure; linear; link; puppio; stiffness; structure; strutturale; system; type
• Evaluation of rheological performance of a local modified bitumen by Styrene Butadiene Styrene polymer used in wearing course by Kebaili, Kebaili; Boucherba, Mohammed; Djouhri, Mohamed; Kebaili, Mustapha (2021) - To meet these constraints and to achieve better mechanical and rheological performance, it has become essential to switch to modified bitumen that has the advantage of being available and inexpensive as mentioned by many others [13,14,15,16]. Figure 4: Fluorescent images of SBS modified bitumen. Keywords: algeria; bitumen; doi; frattura; integrità; penetration; polymer; sbs; strutturale; viscosity
• Il modello della fessura coesiva in trazione e compressione per la valutazione della duttilità degli elementi strutturali in calcestruzzo armato by Carpinteri, Alberto; Corrado, Mauro; Mancini, Giuseppe; Paggi, Marco (2013) - [14] al variare della dimensione strutturale e della percentuale di armatura. Il problema della valutazione della duttilità degli elementi in calcestruzzo armato soggetti a flessione o presso-flessione è stato largamente studiato negli ultimi decenni, sia da un punto di vista sperimentale che analitico. Keywords: alla; armato; calcestruzzo; carpinteri; che; come; comportamento; compressione; con; della; fessura; fig; frattura; materiale; modello; momento; nel; non; plastica; resistenza; risultati; rotazione; sono; sperimentali; strutturale; tra; trazione; una
• Distribuzioni di tensione per intagli soggetti a torsione in condizioni elastiche ed elastoplastiche by Zappalorto, Michele; Lazzarin, Paolo (2013) - Più precisamente gli obiettivi del lavoro possono essere così riassunti: - Fornire un frame comune per l’analisi dei campi di tensione e deformazione indotti da cricche o intagli parabolici in condizioni di taglio antiplanare e un legame analitico tra SIF plastici ed SIF elastici (così come ottenuti da un’analisi lineare elastica); - Esprimere analiticamente la variazione della SED all’apice dell’intaglio o su un volume finito che circonda l’apice di dei campi di tensione può essere anche espressa in funzione dell’NSIF elastico, sostituendo esplicitamente xp: http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.07.03&auth=true M. Zappalorto et alii,, Frattura ed Integrità Strutturale, 7 (2009) 29-56; DOI: 10.3221/IGF-ESIS.07.03 48 ( ) ( ) ( ) ( ) ϕ   Keywords: + +; alii; che; con; delle; dell’intaglio; doi; forma; frattura; http://dx.medra.org/10.3221/igf-esis.07.03&auth=true; intagli; integrità; quindi; strutturale; tensione; una; zappalorto;  ;  ;  ;  
• Elementi di interfaccia per l’analisi di strutture murarie by Sacco, Elio; Toti, Jessica (2013) -  /c s Ns http://dx.medra.org/10.3221/IGF-ESIS.08.01&auth=true http://www.gruppofrattura.it E. Sacco et alii, Frattura ed Integrità Strutturale, 8 (2009) 3-20; DOI: 10.3221/IGF-ESIS.08.01 10 APPLICAZIONI NUMERICHE l modello di interfaccia e la procedura numerica proposta nei paragrafi precedenti sono stati utilizzati per sviluppare alcune applicazioni numeriche. Nei paragrafi successivi, si definisce il modello di interfaccia, riportando le equazioni di stato e le leggi evolutive del danno e dell’attrito modellato tramite la teoria della plasticità. Keywords: alii; analisi; che; comportamento; con; cui; del; della; doi; fig; frattura; integrità; interfaccia; malta; materiale; modello; nel; non; punto; risultati; sacco; sono; spostamento; strutturale; una
• Resistenza a fatica di strutture in leghe di alluminio: normative a confronto e verifica sperimentale by Atzori, B.; Meneghetti, G.; Rossi, B. (2009) - Haibach per le giunzioni in acciaio, alla definizione di una banda di dispersione unificata (Fig. 1) capace di interpretare i risultati di prove di fatica su giunti di geometrie e dimensioni assolute diverse, purché [14] risulta essere: K1N = k1σnt0.326 (1) dove k1 è un coefficiente adimensionale, analogo al coefficiente teorico di concentrazione delle tensioni kt, che dipende dalla geometria delle parti collegate e del cordone di saldatura stesso, σn è il range di tensione nominale applicata, t lo spessore del piatto principale caricato, 0.326 esponente valido nell’ipotesi di cordone di saldatura schematizzato come intaglio con angolo di apertura 135° (caso tipico di cordone d’angolo). Keywords: 8634; atzori; base; caso; che; con; cordone; curva; dati; del; della; eurocodice; fatica; giunti; lega; nel; non; resistenza; saldatura; serie; sono; sperimentali; strutturale; uni; valori
• Valutazione della capacità di rientro alla base di un elicottero in presenza di danno balistico ad un albero di trasmissione della linea rotore di coda by Giudici, L.; Manes, A.; Giglio, M. (2013) - Applicazione degli spettri di carico che simulano la missione di rientro alla base Lo scopo di tutta la sperimentazione è verificare che l’elicottero sia in grado di portare a termine una missione di rientro alla base a potenza ridotta, con un albero di trasmissione del rotore di coda danneggiato dall’impatto di un proiettile. [4-15] per la misura della velocità residua del proiettile, è stato sviluppato un sistema basato sull’applicazione di due accelerometri a due lamine sottili di alluminio, definito per chiarezza espositiva metodo delle lastre sacrificali: la perforazione delle due lastre genera due segnali distinti che vengono registrati da un sistema di acquisizione in grado di calcolarne l’intervallo temporale di emissione; nota la distanza fra le lastre si determina facilmente la velocità del proiettile. Keywords: alii; alla; balistico; che; con; danneggiamento; degli; dei; del; della; doi; figura; foro; frattura; giudici; http://dx.medra.org/10.3221/igf-esis.11.03&auth=true; http://www.gruppofrattura.it; impact; impatto; integrità; proiettile; sono; strutturale; una; velocità
• La modellazione microstrutturale di materiali a struttura eterogenea: princìpi ed applicazioni by Collini, Luca (2013) - Essi forniscono indicazioni sul comportamento d’insieme di un solido disomogeneo, a partire dalla conoscenza del comportamento delle singole fasi e della loro interazione, [5]. Ciascun punto viene determinato come un punto di massimo del gradiente di colore in una determinata area, e l’equivalenza statistica della distribuzione della dimensione dei grani, verificata dopo ogni passaggio, è ottenuta tramite la continua modifica del livello di soglia del riconoscimento dei toni di grigio. Keywords: alla; che; collini; come; comportamento; con; deformazione; dei; della; doi; esempio; essere; fase; fig; figura; frattura; ghisa; http://dx.medra.org/10.3221/igf-esis.12.03&auth=true; http://www.gruppofrattura.it; igf; integrità; materiale; matrice; microstruttura; modellazione; modelli; nel; nodulare; non; più; questo; risposta; sono; strutturale; studio; una; volume;  
• Proposta di utilizzo di metodologie termografiche per il controllo di qualità di componenti meccanici by Clienti, Carmelo; La Rosa, Guido; Risitano, Antonino; D’Andrea, Roberto (2013) - [17] A. Risitano, G. La Rosa, A. Geraci, Sistema di prova per la determinazione rapida del limite di fatica di materiali, Brevetto N. 1237378 (1993) [19-21] procedure idonee alla caratterizzazione sia di materiali che di componenti. Keywords: carico; che; come; componente; con; condizioni; controllo; dei; del; della; fatica; fig; limite; prima; produzione; prova; riferimento; risitano; rosa; stato; strutturale; una
• Analisi del cedimento strutturale del braccio di una gru portuale by Frendo, Francesco (2013) - Nel presente lavoro vengono discusse le cause del cedimento strutturale del braccio di una gru portuale a portata variabile. Si è ipotizzato quindi che in tutti i punti della sezione del corrente si raggiunga una tensione di scorrimento sc, convenzionalmente assunta come media tra la tensione di snervamento e Keywords: alla; braccio; che; circa; collasso; con; del; della; difetto; fase; fessura; figura; frattura; sezione; sono; strutturale; una

• The effect of porosity on fragmentation statistics of dynamically loaded ZrO2 ceramics by Davydova, Marina; Uvarov, Sergei; Naimark, Oleg (2017) - Citation: Davydova, M., Uvarov, S., Naimark, O., The effect of sample porosity on statistical regularities of dynamical fragmentation of ceramic ZrO2, Frattura ed Integrità Strutturale, 43 (2018) 106-112. This hypothesis is confirmed by the following facts:  stress-strain curves for high porosity samples have two maxima, the first of which corresponds to the pore collapse and the second - to the deformation of compacted material;  in the initial stage of fracture, the intervals between the fractoluminescence impulses for the sample with 2% porosity are two or three times longer than for the sample with 30% porosity. Keywords: cluster; distribution; doi; fig; fragmentation; porosity; sample; size; time
• Experimental study on shale fracturing assisted by low-temperature freezing by Han, Zhongying; Cheng, Yuanfang; Li, Xue-Liang; Yan, Chuan-liang (2018) - Shale fracturing experiment assisted by liquid nitrogen A true triaxial experimental system was used for liquid nitrogen fracturing test. Figure 3: True triaxial experimental system for liquid nitrogen fracturing. Keywords: face; fracturing; freezing; liquid; nitrogen; pressure; sample; shale; stress; time
• Intermetallic phase kinetic formation and thermal crack development in galvanized DCI by Bellini, Costanzo; Carlino, Francesco (2019) - Due to different chemical composition, the interdiffusion of atoms generates a non-uniform coating characterized by different intermetallic phases. Then, galvanized specimens are used to perform bending tests in order to evaluate the damage of different intermetallic phases. Keywords: coating; dipping; doi; figure; formation; galvanizing; iron; phase; presence; time; zinc
• Finite Element Modeling of the Behavior of a Hollow Cylinder in a Hydrogen-Containing Environment by Lakhdari, Assia Amina; Bubnov, Serguey A. ; Seddak, Aissa; Ovchinnikov, Ilya I.; Ovchinnikov, Igor G. (2019) - All model parameters are conventionally divided into groups: - the geometrical parameters of the hollow cylinder (inner and outer radii, length); - the loading parameters of the structural element (internal and external pressures, hydrogen concentrations on the internal and external surfaces, number of time steps); T A. A. Lakhdari et alii, Frattura ed Integrità Strutturale, 51 (2020) 236-253; DOI: 10.3221/IGF-ESIS.51.19 240 - the parameters of the initial mechanical properties of the material (modulus of elasticity, transverse deformation coefficient, diffusion coefficient, density, stress diagram, etc.); - the parameters of the finite element model which determine the quality of the mesh; - the massive parameters, containing the mechanical properties of the material that vary in time and space. stress_avg Values of the average stress for each FE at each time step _n el amount concentr Hydrogen concentration values for each FE at each time step _ Keywords: a. a.; concentration; cylinder; doi; element; embrittlement; figure; finite; hydrogen; state; stress; time
• Numerical Investigation of the Seismic Behavior of Unanchored Steel Tanks with an emphasis on the Uplift Phenomenon by Akbari, Jalal; Salami, Omid; Isari, Mohsen (2020) - The structural deformation due to uplifts, the interaction between the fluid movement and the dynamic structural response, and tank stress were completely discussed. Comprehensive studies have been conducted on fluid storage tanks. Keywords: behavior; centro; earthquake; fluid; moment; overturning; storage; stress; tank; time; uplift
• Locating and Quantifying Necking in Piles Through Numerical Simulation of PIT by Salem , Tarek; Eraky, Atef; Elmesallamy, Abdalla (2022) - 5- For smaller pile diameters, the bottom of the parabola in the velocity time history graph is smoother with less noise meaning that the applied force fit well with smaller diameter piles than the larger ones. It is noticed that for pile diameters of 40 and 60 cm, shown in Figs. Keywords: diameter; fig; length; necking; parabola; pile; response; time; velocity
• The earth-fill dam state express investigation using mechanical vibrations produced by HPP by Antonovskaya, Galina; Kapustyan, Natalia (2022) - Nevertheless, the presented opportunity may be a way to improve the system for dam state monitoring, considering the economy and manufacturability of the method. Figure 8: Distribution of amplitudes of mechanical seismic signals on the profile along the dam crest. Keywords: amplitude; dam; doi; earth; fig; frequencies; frequency; hpp; monitoring; nurek; power; seismic; signal; state; time; turbine; variations; vibrations

• Investigation on influence of SiCp on three-body abrasive wear behaviour of glass/epoxy composites by Joshi, Ajith; Basavarajappa, S.; Ellangovan, S.; Jayakumar, B.M (2021) - Abrasive wear plays a vital role in industrial applications like power plant chute liner, mining and earthmoving equipment The sliding of forced irregularly shaped hard particles against the soft matrix materials causes abrasive wear, which lead to severe damage and removal of the material by ploughing and rubbing mechanisms [2, 3]. Keywords: abrasive; behaviour; composites; doi; glass; matrix; particles; sicp; wear
• Synthesis, Microstructural Characterization, Mechanical, Fractographic and Wear Behavior of Micro B4C Particles Reinforced Al2618 Alloy Aerospace Composites by Veeresha , G.; Manjunatha, B.; Bharath, V.; Nagaral, Madeva; Auradi, Virupaxi (2022) - Using a pin on disc wear machine, Al2618 alloy and Al2618 with B4C reinforced composites wear behavior are investigated. In the case of 8 wt. % of 63 micron size B4C reinforced composites it is 270.8 MPa and 217.8 MPa respectively in UTS and yield strength. Keywords: al2618; al2618 alloy; b4c; b4c al2618; b4c composites; b4c particles; composites; fig; matrix; micron; particles; wear; weight
• Mechanical, Wear, and Fracture Behavior of Titanium Diboride (TiB2) - Cerium Oxide (CeO2) Reinforced Al-6061 Hot-rolled Hybrid Composites by Sreenivasa Iyengar, S. R.; Sethuramu, D.; Ravikumar, M. (2022) - Though, from the literature survey it is found that sufficient data on hot rolled hybrid composites is not available on the mechanical properties of Al6061 MMCs. The microhardness of as-cast, hybrid composites and hot rolled hybrid composites are depicted in Fig. Keywords: alloy; ceo2; composites; hardness; hot; hybrid; matrix; mmcs; particulates; tib2; wear
• Effect of Hybrid Nano Particle Reinforcements on Fractographic, Mechanical and Wear Behavior of Al6061 Alloy Composites Developed by Ultrasonic Assisted Stir Casting Technique by Krishnappa, Annapoorna; Ramesh, Shobha; Bharath, Vedashantha Murthy; Siddagangappa, Rajanna; Ashokkumar, Srimadhu; Nagaral, Madeva; Auradi, Virupaxi (2024) - According to the literature review, various studies have been published on aluminium alloy metal matrix composites with nanoparticle reinforcement; nevertheless, there is a paucity of research on hybrid nanoparticle reinforcement. 1 wt. % ZrO2 composites exhibit lower percentage of elongation in contrast to the composites with varying weight percentages (0.5, 0.75, 1 and 1.25 wt %) of Al2O3 and ZrO2, as well as cast Al6061 alloy (14.20%) 5. Keywords: al2o3; al6061; al6061 alloy; alloy; composites; figure; matrix; mechanical; nano; particles; rate; reinforcement; wear; zro2; zro2 al6061

• Use of a gray level co-occurrence matrix to characterize duplex stainless steel phases microstructure by Renzetti, F. R.; Zortea, L. (2013) - Each number corresponds to different gray level or different shades of gray level. D http://dx.medra.org/10.3221/IGF-ESIS.16.05&auth=true http://www.gruppofrattura.it F. R. Renzetti et alii, Frattura ed Integrità Strutturale, 16 (2011) 43-51; DOI: 10.3221/IGF-ESIS.16.05 44 ANALYSIS METHOD he spatial relationship of gray levels is expressed by the co-occurrence matrix suggested by Haralick Keywords: figure; glcm; image; indicator; information; levels; matrix
• Geometric numerical integrators based on the Magnus expansion in bifurcation problems for non-linear elastic solids by Castellano, A.; Foti, P.; Fraddosio, A.; Marzano, S.; Piccioni, M. D. (2014) -  T 1 2 1 2 r, r, r, , r, , r, , r, , r r r r r                       1 2 1 2 , r r r r r          v Tv Kv v v 0 (37) Keywords: lie; magnus; matrix; r r;  ;  ;  
• Damaging micromechanisms characterization in a ferritic-pearlitic ductile cast iron by Di Cocco, Vittorio; Iacoviello, Francesco; Rossi, Alessandra; Cavallini, Mauro (2014) - The increase of the macroscopic deformation implies the activation of different damaging micromechanisms with cracks that initiate and propagate in the graphite nodules (Fig. 4a), with the debonding at the interface ferritic shield – graphite nodules that is more and more evident (Fig. Main D V. Di Cocco et alii, Frattura ed Integrità Strutturale, 30 (2014) 62-67; DOI: 10.3221/IGF-ESIS.30.09 63 damaging micromechanism of ferritic DCIs (maybe, the most investigated grades) was usually identified with the ferritic matrix - graphite nodules debonding [2]: microcracks in graphite nodules were also observed, but their influence was considered as practically negligible and ferritic DCIs were considered as a ductile porous material Keywords: graphite; matrix; micromechanisms; nodules; pearlitic; shield
• Stress triaxiality influence on damaging micromechanisms in a pearlitic ductile cast iron by Di Cocco, Vittorio; Iacoviello, Francesco; Rossi, Alessandra; Cavallini, Mauro (2014) - According to this scheme, graphite nodules are considered as voids embedded in a metal matrix. Stress increase implies both cracks propagation in graphite nodules, and matrix plastic deformation with cracks V. Di Cocco et alii, Frattura ed Integrità Strutturale, 30 (2014) 462-468; DOI: 10.3221/IGF-ESIS.30.56 464 propagation in pearlitic matrix. Keywords: graphite; matrix; micromechanisms; nodule; stress; triaxiality

• Evaluation of safe bearing capacity of soil foundation by using numerical analysis method by Namdar, Abdoullah; Feng, Xiong (2014) - To evaluate the safe bearing capacity of soil foundation and select appropriate dimensions of concrete foundation, when soil foundation is constructed from mixed soil, a numerical analysis has been made; ithas been attempted to appropriately improve stability of structures, to optimize application of mixed soil in soil foundation design, and to achieve realistic simulation of soil foundation design. The numerically wave theory concept has been applied in analyzing confined sandy dense columns, and the study indicated that the dense zone improves soil foundation bearing capacity Keywords: bearing; capacity; design; foundation; numerical; soil
• Numerical investigation of an extra-deep drawing process with industrial parameters: formability analysis and process optimization by Belguebli, Amina; Zidane, Ibrahim; Hadj Amar, Adel; Benhamou, Abdessoufi (2024) - Nowadays, numerical analysis based on the FE method offers a better understanding of deep drawing processes [17], enabling the prediction of forming defects [18,19] and providing insights into deformed shape, stress and strain distribution, and punch loading [20–22]. A review on effect of thinning, wrinkling and spring-back on deep drawing process, Proc. Keywords: bhp; blank; doi; drawing; fig; metal; mpa; numerical; process; punch; sheet; thickness; tray; wheelbarrow; wrinkling

• Quantitative estimating size of deep defects in multi-layered structures from eddy current NDT signals using improved ant colony algorithm by Ye, Bo; Li, Ming; Qiu, Gefei; Dong, Jun; Zeng, Fang (2014) -                 Detection and quantitative estimation of deep defects in multi-layered structures is an essential task in a range of technological applications, such as maintaining the integrity of structures, enhancing the safety of aging aircraft, and assuring the quality of products. Keywords: algorithm; current; defect; iaca; method; r j; r r; structures
• A numerical framework for simulating fluid-structure interaction phenomena by De Rosis, A.; de Miranda, S.; Burrafato, C.; Ubertini, F. (2014) - Fluid-structure interaction; Lattice Boltzmann method; Immersed boundary method; Volume-of- Fluid method; Dam break; Flapping flags. [17] De Rosis, A., Falcucci, G. Ubertini, S., Ubertini, F. (2014), Aeroelastic study of flexible flapping wings by a coupled lattice Boltzmann-finite element approach with immersed boundary method, Journal of Fluids and Structures, (2014) Keywords: boltzmann; boundary; fluid; interface; lattice; method; structure
• The research for mechanics stimulation method of nonlinear random vibration based on statistical linear theory by Guodong, Wang (2014) - The Comparison between Absolute Displacement Method and Random Vibration Method The charts in Fig. 3 are to respectively represent that the main span of cable-stayed bridge, the power spectral density of back span are influenced by several factors in the case, where the linear points denote random vibration method, the dashed points denote absolute displacement method. We analyze from the area surrounded by curve and the abscissa that the mean square value of seismic random vibration wave obtained through calculation with absolute displacement method is on the smaller side, namely the energy acting on cable- stayed bridge is too small, and it demonstrates that random vibration method is a kind of seismic analysis method, which is conservative in relative speaking. Keywords: density; displacement; excitation; method; power; response; span; spectral; vibration
• Structural Form of Bridges Reflecting the Construction Processes by Mizuno, Yusuke; Kubota, Yoshiaki (2018) - This figure also shows three classifications of structural systems: a suspension system, beam systems, and an arch system. This study aims to extend these principles to construction systems. Keywords: bridge; construction; efficiency; form; method; structure; suspension; system
• Residual stress determination by blind hole drilling and local displacement mapping in aluminium alloy aerospace components by Eleonsky, Sviatoslav; Pisarev, Vladimir; Statnik, Eugene; Salimon, Alexey; Korsunsky, Alexander (2024) - Residual stress, Blind hole drilling method, Speckle-pattern interferometry, Well-posed inverse correlation problem Citation: Eleonsky, S., Pisarev, V., Statnik, E. S., Salimon, A. I., Korsunsky, A., M., TResidual stress determination by blind hole drilling and local displacement mapping in aluminium alloy aerospace components, Frattura ed Integrità Strutturale, 69 (2024) 192-209. Despite being “hidden” in the absence of external loads, residual stresses play a crucial role in the R https://youtu.be/j6kXih0kvAA S. Eleonsky et alii, Frattura ed Integrità Strutturale, 69 (2024) 192-209; DOI: 10.3221/IGF-ESIS.69.14 193 material deformation behavior Keywords: components; determination; doi; drilling; fig; fringe; hole; measurement; method; mpa; principal; stress; stresses

• Investigation on some factors affecting crack formation in high resistance aluminum alloys by Brotzu, A.; Felli, F.; Pilone, D. (2017) - DISCUSSION he fracture of high resistance aluminum alloys can be due to different causes. For this reason aluminum alloy microstructures are characterized by the presence of secondary phases (usually intermetallic compounds) dispersed in an aluminum matrix. Keywords: 7050; alloy; aluminum; corrosion; grain; intergranular; phases; treatment
• Haynes 242 Alloy for Lares 2 Satellite by Pilone, Daniela; brotzu, Andrea; Felli, Ferdinando; Ciufolini, Ignazio; Negri, Barbara; Paris, Claudio (2021) - The satellite will also contribute to space geodesy and global climate monitoring similarly to what has been done with LARES satellite [3]. This type of design has been experimented the first time with LARES satellite [4]. Keywords: alloy; casting; doi; haynes; lares; pilone; satellite
• Investigation on Microstructure, Hardness, Wear behavior and Fracture Surface Analysis of Strontium (Sr) and Calcium (Ca) Content A357 Modified Alloy by Statistical Technique by Ganesh, K.; Hemachandra Reddy, K.; Sudhakar Babu, S.; Suresh, R (2023) - Al alloys with added calcium become low-cost Mg alloys which can be used as enhanced heat resistant component in automobile applications It was stated that, the adding small quantity of Ca into Al alloy can lead to refinement of the grain-structures and also enhances the mechanical properties. Keywords: a357; alloy; cast; cof; content; doi; effect; hardness; loss; parameters; wear

• Method for weak zones location at the coal-bed – host rock joint relative to the problem of sudden outbursts: theory and laboratory experiment by Nazarova, Larisa A; Nazarov, Leonid (2022) - The interfaces of coal beds and host rocks play the same role. GEOMECHANICAL MODEL OF THE OBJECT Longwall mining technology ongwall mining is one of the most effective methods for extracting coal beds of various thickness (from thin, up to 1 m to high coal, more than 5-6 m). Keywords: bed; coal; data; doi; fig; mining; nazarova; rock; stress; tomography

• Effective stress assessment at rectangular rounded lateral notches by Maggiolini, Enrico; Tovo, Roberto; Livieri, Paolo (2015) - The FE software COMSOL MULTIPHYSICS admits the implementation of this kind of equation. GEOMETRIES AND MODEL PROPERTIES wo macrosets of notch geometry were created with variable notch height. T T E. Maggiolini et alii, Frattura ed Integrità Strutturale, 33 (2015) 183-190; DOI: 10.3221/IGF-ESIS.33.23 185 Figure 1: First two sets of notch geometries. Keywords: gradient; maximum; notch; notches; stress; σeff
• A unified rule to estimate multiaxial elastoplastic notch stresses and strains under in-phase proportional loadings by Meggiolaro, Marco Antonio; Tupiassú Pinho de Castro, Jaime; Martha, Luiz Fernando; Nazaré Marques, Luiz Fernando (2016) - Microsoft Word - numero_38_art_17 M. A. Meggiolaro et alii, Frattura ed Integrità Strutturale, 38 (2016) 128-134; DOI: 10.3221/IGF-ESIS.38.17 128 Focussed on Multiaxial Fatigue and Fracture A unified rule to estimate multiaxial elastoplastic notch stresses and strains under in-phase proportional loadings Marco Antonio Meggiolaro, Jaime Tupiassú Pinho de Castro, Luiz Fernando Martha Pontifical Catholic University of Rio de Janeiro, PUC-Rio, R. Marquês de São Vicente 225, Rio de Janeiro, 22451-900, Brazil meggi@puc-rio.br, jtcastro@puc-rio.br, lfm@tecgraf.puc-rio.br Luiz Fernando Nazaré Marques Federal University of South and Southeast of Pará, UNIFESSPA, Av. dos Ipês S/N, Marabá, 68500-000, Brazil lfernando@unifesspa.edu.br ABSTRACT. [4] Hoffmann, M., Seeger, T., A generalized method for estimating multiaxial elastic plastic notch stresses and strains, Part I: Theory, J Eng Mat Tech, 107 (1985) 250-254. Keywords: notch; strains; stresses;  
• Numerical analysis of bonded composite patch efficiency in the case of lateral U and V-notched aluminium panels by Bouchelarm, Mohammed A.; Boulenouar, Abdelkader; Chafi, Meriem (2022) - In this study, the finite element method is applied to investigate the mechanical behavior of aluminium notched structures reinforced by composite patch. [21] studied the prediction of failure pressure in pipelines with localized defects repaired by composite patches. Keywords: doi; effect; epoxy; notch; patch; plate; stress; thickness
• Revisiting classical concepts of Linear Elastic Fracture Mechanics - Part II: Stretching finite strips weakened by single edge parabolically-shaped notches by Markides, Christos; Kourkoulis, Stavros K (2024) -                                                Keywords: cos sin; notch; r θ; stress; strip; θ sin; θ θ;  ;  

• Studio delle prestazioni di giunzioni incollate ibride (Strength evaluation of structural hybrid bonded joints) by Moroni, F. (2013) - C 60°C C d Integrità Strutt in acciaio sem mperatura di e brid (b) joints ridi (b); le linee hybrid (b) joint hout ageing (su ncollati (a) e giu feriscono a giu brid (b) joints e welded joints C C turale, 15 (2011) mplicemente inc esercizio. Da ti evidenziano o con una mig ilità del loro ue tecnologie ro citato in p ui a seconda e a bruciatura mpi di giunz are per capilla ben si accopp e la clinciatura anto tutte qu ivo non anco non possibile e quindi cos ggeri, con ma o d’urto. Keywords: -1 -1; -30; alla; carico; caso; che; come; con; cui; dei; del; delle; doi; fig; figura; frattura; giunti; giunzioni; http://dx.medra.org/10.3221/igf-esis.15.06&auth=true; http://www.gruppofrattura.it; hybrid; ibridi; igf; incollati; integrità; joints; nei; nel; non; nto; passo; più; punto; quel; questo; saldati; sem; sono; spr; str; temp; tra; una
• Fracture toughness and fatigue resistance of quenched and tempered steels with microstructures deriving from a slant quench. Consequences on technical standards by Firrao, D.; Matteis, P. (2013) - Rimane quindi a resistere davanti alla cricca di fatica in propagazione un pettine di lamelle di ferrite, che la cricca supererà una alla volta. Per un materiale completamente duttile per il quale sia applicabile in toto il modello di arrotondamento dell’apice della cricca e di generazione delle striature, il valore di n dovrebbe essere uguale a 2, come ricavabile dalla correlazione ipotizzabile fra l’incremento ∆a e il CTOD in ogni ciclo e dai modelli di danneggiamento per accumulo di deformazione plastica, [10] dato che il CTOD è proporzionale a ∆K2. Keywords: acciaio; alla; anche; bainite; che; con; costituenti; crescita; cricca; dal; della; fatica; ferrite; fig; figura; firrao; frattura; integrità; martensite; non; perlite; più; propagazione; rinvenimento; rinvenuta; solo; sono; struttura; tempra; temprato; una; valori; velocità

• Research on parameters optimization of bilateral ring gear blank-holder in thick-plate fine blanking by Su, C.J.; Dong, X.H.; Guo, S.M.; L.Li, Q.; Li, T.T. (2014) - Material fracture (f) Partial view Figure 3: Fine blanking process simulation of ring gears with both sides (a) V shape (b) step shaped (c) cone gear form Figure 4: The hydrostatic pressure distribution with different gear ring form. Process simulation of the double ring gear pressure side From Fig. 3 (a) to (e) it can be seen that in the process of double ring gear blank holder blanking, the shear zone of hydrostatic pressure is significantly higher than other parts, and compressive stress is also larger near the punch and die cutting edge. Keywords: blanking; fine; gear; pressure; quality; ring; stress; tooth; zone
• Design of a novel magnetorheological damper with internal pressure control by Golinelli, Nicola; Spaggiari, Andrea (2015) - INTRODUCTION owadays, there are several industrial applications in which magnetorheological fluids (MRFs) are used [1-3]. [6] Spaggiari, A., Dragoni, E., Effect of internal pressure on flow properties of magnetorheological fluids, in: ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, 1 (2011) 7–15. Keywords: damper; design; fig; fluid; head; magnetic; piston; pressure; rod
• Study of the conditions of fracture at explosive compaction of powders by Buzyurkin, Andrey E.; Kraus, Evgeny I.; Lukyanov, Yaroslav L. (2013) - Joint theoretical and experimental investigations have allowed to realize an approach with use of mathematical and physical modeling of processes of a shock wave loading of powder materials. INTRODUCTION ethods of explosive loading of powder materials in conservation ampoules are applied in order to obtain new materials including composite ones with the unique physical and mechanical properties. Keywords: detonation; fig; pressure; sample; shock; velocity
• On the assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016 by González-Velázquez, Jorge Luis ; Entezari, Ehsan; Szpunar, Jerzy A. (2021) - SCOPE AND ASSESSMENT CRITERIA OF NON-METALLIC INCLUSIONS BY PART 13 OF API 579-1/ASME FFS-1 STANDARD Definition and applicability criteria of non-metallic inclusion zone he NMIs are not considered as defects by any code, standard, or technical specification of mechanical integrity or FFS. On the Assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016 Jorge Luis González-Velázquez, Ehsan Entezari Department of Metallurgy and Materials, Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Mexico jlgonzalezv@ipn.mx, https://orcid.org/0000-0001-6914-4449 ehsan.entezari2014@gmail.com, https://orcid.org/0000-0003-3379-1761 Jerzy A. Szpunar Department of Mechanical Engineering, University of Saskatchewan, Canada jerzy.szpunar@usask.ca, https://orcid.org/0000-0002-1291-8375 ABSTRACT. Keywords: api; assessment; doi; hydrogen; inclusions; lamination; level; nmis; pressure; zones
• Modello di tenuta della flangia bullonata, senza guarnizione, mediante l’analogia della meccanica della frattura di una fessura parzialmente aperta by Beghini, M.; Bertini, L.; Santus, C.; Cagnarini, C.; Romanello, P. (2013) - (a) (b) Figura 2: (a) Dimensioni principali della geometria della flangia. I parametri geometrici principali sono: VD diametro interno della cassa, Vt spessore della parete della cassa, Z posizione dell’asse del bullone (o del prigioniero) rispetto alla superficie interna della cassa, Hd diametro del foro del bullone, BP passo della fila di bulloni in direzione assiale, H altezza di ciascuna delle superfici della flangia, W larghezza della flangia, ed infine H / 2L Z d  è la “distanza di perdita” ossia l’estensione della separazione fra le due superfici Keywords: alla; beghini; bullone; che; condizione; contatto; dei; della; distribuzione; fessura; flangia; frattura; interna; journal; modello; nominale; non; perdita; preserraggio; pressione; pressure; superfici; tensione; una

• Study of the influence between the strength of antibending of working rolls on the widening during hot rolling of thin sheet metal by Muhin, U.; Belskij, S.; Koynov, T. (2016) - Results are obtained, characterizing the size of the widening and effectiveness of the process control on tension at the entrance and exit from the stand. The first integral (2) is the power of internal resistance, the second - power of the external forces on the borders of the center - the forces of friction between the rolls and the strip, front and rear tension, the third - power cut. Keywords: broadening; deformation; power; rolling; tension; zone

• Exercise as a mean to reverse the detrimental effect of high-fat diet on bone’s fracture characteristics by Doulamis, Ilias; Perrea, Despina N.; Chatzistergos, Panagiotis E.; Mitousoudis, Athanasios S.; Kourkoulis, Stavros K. (2017) - How- ever, the aforementioned classic view on the effect of obesity has been put into question from findings that link obesity to the loss of bone mass and osteopenia These findings indicate that exercise tends to limit the HFD-induced loss of bone mass by increasing the thickness of the femurs’ cortical shell. Keywords: body; bone; diet; effect; exercise; fat; force; group; hfd; levels; mass; obesity; weeks
• Optimization of Ultimate Tensile Strength with DOE Approach for Application FSW Process in the Aluminum alloys AA6061-T651 & AA7075 -T651 by Chaib , Mohammed; Slimane, Abdelkader; Slimane , Sid Ahmed; Ziadi , Abdelakder; Bouchouicha , Benattou (2021) - Welding speed (mm/min) (S) ≡ (X2) Figure 5: Interaction between rotational speed and welding speed. Keywords: doi; effect; pin; process; rotation; speed; welding

• Possibility of tuning shunt circuits for multimodal damping of vibrations of structure with piezoelectric element by Iurlova, Nataliia A.; Oshmarin, Dmitrii A.; Iurlov, Maksim A.; Sevodina, Nataliya V. (2019) - On the basis of the solution to the natural vibration problem (1)–(7), values of natural vibration frequencies were obtained for the shell without an external circuit (real) and with a series RL-circuit (complex), with the parameters chosen to reach maximal damping of corresponding frequencies from the specified frequency range. AT ALL THE FREQUENCIES IN THE SPECIFIED FREQUENCY RANGE he previous section demonstrated the possibility of damping vibrations for an electromechanical system at several separate frequencies within the specified frequency range using the same parameters as for shunt circuit elements. Keywords: circuit; complex; damping; doi; element; frequencies; frequency; multimodal; parameters; piezoelectric; shunt; structure; vibration
• High-quality nodule analysis in spheroidal graphite cast iron using X-ray micro-computed tomography by Toledo, Juan; Diaz, Felipe; Peralta, Matías; Fernandino, Diego (2022) - For example, it was reported that graphite nodules with low nodularity (poor quality) affect the fatigue crack propagation path and the crack growth mechanisms [7,13]. This technique allows characterizing the spatial distribution of graphite nodules with great precision, quantifying the size, shape and location of each nodule regarding a coordinate system Keywords: cast; count; distribution; doi; graphite; iron; nodules; parameters; quality
• Efficiency of shape memory alloy seismic restrainers for several conditions of bridge joints by El-Feky, Mohamed Hamdy; Eraky, Atef; M. Sharabash, Alaa (2023) - The response of the opening (the difference between the response of two adjacent frames) in the case of without SMA bridge and with SMA bridge is shown in Fig. These models include the case of two adjacent frames with SMA inside them (2–frames), the case of multi–frames with constant hysteretic SMAs between every two of them (N–frames), the case of multi–frames with constant hysteretic SMAs taking the delay of seismic forces between frames into consideration (delay), and the case of variable masses of bridge frames. Keywords: bridge; case; doi; fig; frames; hinge; joint; opening; parameters; period; ratio; shape; sma; study

• Modelling of Low-velocity Impacts on Composite Beams in Large Displacement by Utzeri, Mattia; Sasso, Marco; Chiappini, Gianluca; Lenci, Stefano (2021) - Figure 2: Sketch of cantilever beam with intermediate mass M. Utzeri et alii, Frattura ed Integrità Strutturale, 58 (2021) 254-271; DOI: 10.3221/IGF-ESIS.58.19 257 In order to describe the nonlinear response of the impacted beam in large deflection, the equations of motion are determined starting from the definition of the energies. The model can be validated through a comparison with the vibration of cantilever beam with an intermediate fixed mass. Keywords: beam; doi; impact; mass; nonlinear; projectile; velocity;  
• Experimental and computational study on dynamic analysis of cracked simply supported structures under moving mass by Jena, Shakti P.; Bulut, Cihan O.; Kurt, Serpil (2022) - C. O. Bulut et al., Frattura ed Integrità Strutturale, 60 (2022) 114-133; DOI: 10.3221/IGF-ESIS.60.09 123 NUMERICAL ANALYSIS his section is devoted to numerical analysis of cracked structures under transit mass to verify the theoretical model with regards to moving mass damaged beam structure. [29] Dash, A. K. (2012).Multiple damage identification of beam structure using vibration analysis and artificial intelligence techniques, Ph.D. Dissertation, NIT, Rourkela. Keywords: beam; doi; mass;  

• Applicazione della meccanica della frattura viscoelastica alla previsione della vita di tubi in polibutene by Andena, Luca; Rink, Marta; Frassine, Roberto (2013) - I risultati ottenuti sono stati interpretati seguendo l’approccio della meccanica della frattura e applicando uno schema di riduzione di tipo tempo-temperatura che ha permesso di descrivere il comportamento viscoe- lastico del materiale su un intervallo temporale di diverse decadi. In analogia con quanto fatto in [4] nel calcolo si è trascurato il tempo di innesco, formu- lando quindi una previsione conservativa della vita utile del tubo. Keywords: che; con; della; fig; frattura; modello; pb1; pressione; propagazione; prove; senb; sono; temperatura; tubi; una
• Sulla storia degli studi di frattura in Italia by Colombo, Roberto L.; Firrao, Donato (2013) - Presto si scoprì negli Stati Uniti che α non era per nulla una costante, il che significava che o la teoria era sbagliata o gli esperimenti in difetto. Il Curioni definisce accuratamente le tensioni di snerva- mento e di rottura: Lo snervamento ha luogo nei corpi soggetti a for- ze esterne quando queste, crescendo al di sopra di un cer- to limite, hanno prodotto un tale spostamento molecolare che non è più possibile che le molecole spostate, mentre restano sotto l'azione delle dette forze, si riaggreghino in un nuovo stato di equilibrio stabile, il che quindi col tem- po produce una disaggregazione totale, cioè la rottura. Keywords: alla; beltrami; carico; che; cioè; con; dei; della; egli; elastico; filo; frattura; galileo; leonardo; limite; nel; non; più; quello; questo; rottura; scienziati; serie; snervamento; sono; sotto; sua; sulla; tensione; torino; una; uno
• Sulla storia degli studi di frattura in Italia by ; (2013) - Presto si scoprì negli Stati Uniti che α non era per nulla una costante, il che significava che o la teoria era sbagliata o gli esperimenti in difetto. Il Curioni definisce accuratamente le tensioni di snerva- mento e di rottura: Lo snervamento ha luogo nei corpi soggetti a for- ze esterne quando queste, crescendo al di sopra di un cer- to limite, hanno prodotto un tale spostamento molecolare che non è più possibile che le molecole spostate, mentre restano sotto l'azione delle dette forze, si riaggreghino in un nuovo stato di equilibrio stabile, il che quindi col tem- po produce una disaggregazione totale, cioè la rottura. Keywords: alla; beltrami; carico; che; cioè; con; dei; della; egli; elastico; filo; frattura; galileo; leonardo; limite; nel; non; più; quello; questo; rottura; scienziati; serie; snervamento; sono; sotto; sua; sulla; tensione; torino; una; uno
• Analisi basata sugli sforzi locali della resistenza a fatica di giunzioni incollate di materiali compositi by Beretta, S.; Bernasconi, A.; Pirondi, A.; Moroni, F. (2009) - Osservazioni dell’evoluzione del danneggiamento di un giunto da TC 110.8 mm (durata della prova: 18700 cicli). Figura 12: Osservazioni dell’evoluzione del danneggiamento di un giunto da TC 110.8 mm (durata della prova: 140500 cicli). Keywords: adesivo; cicli; con; degli; dei; della; fatica; fig; frattura; giunti; massimo; propagazione; sforzo; sono; sovrapposizione; strato; una
• Caratterizzazione microstrutturale e prove di resilienza su giunti Friction Stir Welding e Linear Friction Welding di compositi a matrice metallica by Ceschini, L.; Morri, A.; Rotundo, F.; Garagnani, G.L.; Merlin, M. (2013) - Prove di resilienza I risultati delle prove di resilienza effettuate sui compositi saldati FSW e LFW, e sui corrispondenti materiali base, sono riportati in Fig. 13. In entrambi i giunti FSW e LFW, è possibile evidenziare un’ottima adesione tra matrice e rinforzo. Keywords: base; ceschini; che; compositi; con; dei; della; fig; figura; frattura; friction; fsw; giunti; lfw; materiale; matrice; nel; particelle; processo; resilienza; rinforzo; saldatura; sono; una; w6a20a; welding

• Integrated structure for a resonant micro-gyroscope and accelerometer by Zega, V.; Comi, C.; Corigliano, A.; Valzasina, C. (2014) - Figure 2: Schematic views of the resonators: (a) in-plane view of bending resonator, (b) in-plane and side view of torsional resonator Their expressions can be obtained as in [13] making use of the Hamiltonian’s principle and searching for the solution, in terms of transverse displacement of the beam, in the form ( , ) ( ) ( )w y t y W t . The proposed device makes simultaneous use of two different operating principles typical of resonant MEMS: the frequency shift due to the presence of axial stresses in slender resonating beams and the frequency shift due to variations of the so-called electrical stiffness in torsional resonators. Keywords: acceleration; axis; mass; plane; resonators; velocity

• Study of drilling muds on the anti-erosion property of a fluidic amplifier in directional drilling by He, Jiang-fu; Zhang, Peng-yu; Yin, Qi-lei; Yin, Kun; Liu, Hou-ping (2015) - Simulation results have shown that the jet nozzle of fluidic amplifiers is primarily abraded, afterwards are the lateral plates and the wedge of the fluidic amplifier, which shows extraordinary agreement with the actual cases of fluidic amplifier in drilling process. W.T. Li have analyzed the effect of material of fluidic amplifier on its service life time, and numerical models of the damage mechanism of fluidic amplifiers are established [9]. Keywords: amplifier; drilling; drilling muds; erosion; jet; muds; rate; velocity

• Evaluation of cavitation erosion resistance of Al-Si casting alloys: effect of eutectic and intermetallic phases by Tocci, Marialaura; Pola, Annalisa; Montesano, Lorenzo; Marina La Vecchia, G. (2017) - Microsoft Word - numero_43_art_17 M. Tocci et alii, Frattura ed Integrità Strutturale, 43 (2018) 218-230; DOI: 10.3221/IGF-ESIS.43.17 218 Evaluation of cavitation erosion resistance of Al-Si casting alloys: effect of eutectic and intermetallic phases Marialaura Tocci, Annalisa Pola, Lorenzo Montesano, G. Marina La Vecchia Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, 25123, Brescia, Italy m.tocci@unibs.it, http://orcid.org/0000-0002-7515-0615 annalisa.pola@unibs.it, http://orcid.org/0000-0002-0722-6518 lorenzo.montasano@unibs.it, http://orcid.org/0000-0001-5465-6265 marina.lavecchia@unibs.it, http://orcid.org/0000-0001-5919-0396 ABSTRACT. [1]. Various studies are available in scientific literature regarding the characterization of cavitation erosion resistance of different alloys, as such as steels Keywords: alloys; alsi9; alsi9cufe; cavitation; cavitation erosion; erosion; fig; heat; intermetallic; particles; resistance; treatment
• Effect of composition and heat treatment on the mechanical properties of Fe Mn Al steels by Mondal, Avishek; Pilone, Daniela; Brotzu, Andrea; Felli, Ferdinando (2022) - By studying the effect of heat treatment on the other studied alloys, it has been observed that, depending on the alloy composition, aging heat treatments can significantly raise the alloy hardness by decreasing the alloy fracture toughness, as it is evident from tensile tests. Shot Peening Processes to obtain Nanocrystalline surfaces in metal alloys: A. Mondal et alii, Frattura ed Integrità Strutturale, 62 (2022) 624-633; DOI: 10.3221/IGF-ESIS.62.43 624 Effect of composition and heat treatment on the mechanical properties of Fe Mn Al steels A. Mondal, D. Pilone, A. Brotzu, F. Felli DICMA, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy avishek.mondal@uniroma1.it, https://orcid.org/0000-0001-6292-4418 daniela.pilone@uniroma1.it, https://orcid.org/0000-0002-8757-8360 andrea.brotzu@uniroma1.it, https://orcid.org/0000-0001-9530-4602 ferdinando.felli@uniroma1.it, https://orcid.org/0000-0002-7527-8096 ABSTRACT. Keywords: alloys; doi; heat; steels; treatment

• Finite element analysis of the interface defect in ceramic-metal assemblies: Alumina-Silver by Farida, Bouafia; Hadid, Lamia; Boualem, Serier; Sikandar, Sardar (2020) - The diameter of the interface defect is 50 µm which characterize an average size of interface defect site. Figure 1: (a) A 2–D schematic view of metal/ceramic with the site of interface defect, (b) Geometry of model, (c) Finite element mesh, (d) Boundary condition and loading condition and (e) site of interface defect-defect interaction. Keywords: ceramic; defect; distance; fig; interface; metal; mpa; stresses
• Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface by Boudjemaa, Ismail; Sahli, A.; Benkhettou, A.; Benbarek, S. (2021) - To find out the effects of implant stiffness, five values for the elastic modulus, ranging from 0.1 to 0.5 MPa, with an interval of 0.1 MPa were employed in the implant structure of the FE model. To find out the effects of implant stiffness, five values for the elastic modulus, ranging from 0.1 to 0.5 MPa, with an interval of 0.1 MPa were employed in the implant structure of the FE model. Keywords: bone; case; doi; implant; interface; mpa; stiffness; stump

• Experimental and numerical study of cemented bone-implant interface behavior by Kytyr, D.; Doktor, T.; Jirousek, O.; Zlamal, P.; Pokorny, D. (2010) - The hip l femoral co f damage ac uted Tomogr gation of st n. an artificial p e hip joint th d by several c 1) 5-13; DOI: 10 cs and Materia s, Prosecka´ 7 d of surgica instability o avior. erties of the bH) were pr (3) s in the range acement fixati nt model of he gait divided d of 4 separat rovided by component w was designed regardless of e material in The goemetry nts first. Keywords: adobe; alii; bone; cement; cycle; doi; fig; figure; gait; hip; igf; kytyr

• Liquefaction mathematical analysis for improvement structures stability by Namdar, A.; Pelko, A. K.; Nusrath, A. (2013) - The resul a for develo uefaction for ysis of struc nical Prope nian region ha ctice all over e methods to d to resist the h for assessm mature and sat sess liquefact it is reporte ed vertical dr aced in Horm this purpose pt to achievin andar Abbas analyzed to im of any specim 0.3221/IGF-ESIS. Integrità Strutt or ma Nusrath dation is app eismicity and f city have b provement o ties have be acteristics o od for calcula des and also uth Iran; S seismic hazard t with in eng anks, or other atment, are w and essentia inforcement, presently em for supporti nd treated wit an economic, other natural s. Authors ma method directl iments, sever of safe beari turale, 14 (2010) Keywords: ation; city; force; soil; stability; structure; wave
• Effective properties of a new auxetic triangular lattice: an analytical approach by Cabras, L.; Brun, M. (2014) - α α e α - e α6 3 7 4 8 3 4 4 3 45         (19) where: e1=9 (2cos4γ-3cos2 γ+1) e2=(2cos4γ-cos2γ) e3=3(4cos2γ sin2γ-1) α α - d α - d α1 1 8 1 2 2 1 2 9 1 4 2 10 1 2 6 1 7 2                  (17) where the constants d1, d2, d4, d6-10 are given in Eq. Keywords: fig; lattice; poisson; ratio; structure
• Earthquake design for controlled structures by Pnevmatikos, Nikos G.; Papagiannopoulos, George A.; Hatzigeorgiou, George D. (2017) - Lee et al., 2004, [7] determined the upper limit of control force based on the response spectrum of the external earthquake. If the capacity is smaller than the required control force then a scale factor, α, reducing the elastic forces to new design forces is calculated. Keywords: capacity; control; design; devices; earthquake; elastic; forces; spectrum; structure

• Flaw-tolerance of nonlocal discrete systems and interpretation according to network theory by Infuso, A.; Paggi, M. (2014) - Three different values of NLI are considered for each system: NLI=1 (local system), NLI=2, NLI=3. Microsoft Word - numero_29_art_26 A. Infuso et alii, Frattura ed Integrità Strutturale, 29 (2014) 302-312; DOI: 10.3221/IGF-ESIS.29.26 302 Focussed on: Computational Mechanics and Mechanics of Materials in Italy Flaw-tolerance of nonlocal discrete systems and interpretation according to network theory A. Infuso Politecnico di Torino, Department of Structural, Geotechnical and Building Engineering, Corso Duca degli Abruzzi 24, 10129 Torino, Italy andrea.infuso@polito.it M. Paggi IMT Institute for Advanced Studies Lucca, P.zza San Francesco 19, 55100 Lucca, Italy marco.paggi@imtlucca.it ABSTRACT. Keywords: case; displacement; fig; force; interactions; nli; nodes; system; vector

• Contribution of longitudinal stiffener rigidity and position to bridge girder integrity by Maiorana, Emanuele (2019) - Optimum value of h / h vs.  for optimal cross-section stiffener. Figure 7: Buckling coefficient k vs. stiffener position h / h for plate under pure bending moment. Keywords: buckling; cross; kth; plate; section; stiffener
• Influence of porosity on the analysis of sandwich plates FGM using of high order shear-deformation theory. by Merdaci, Slimane; Mostefa, Adda Hadj (2019) -  0 0 0 0 b b b b b b s s x x y y xy xy x x y y xy xy x x s s s s s s s s y y xy xy yz               (12) 0 12 11 1211 12 11 0 12 22 12 22 12 22 11 12 11 12 11 12 12 22 12 22 12 22 11 12 11 12 11 12 12 22 12 22 12 22 s s x x s sy y b bs s x x b s s y s s s s s s s x s s s s s s s y N B B BA A B N A A B B B B M B B D kD D D M kB B D D D D M B B D D H H M B B D D H H      Keywords: b b; b s; plate; s s; y y
• Influence of the applied layer on the state of stress in a bimetallic perforated plate under two load variants by Konieczny, Mateusz; Gasiak, Grzegorz; Achtelik, Henryk (2021) - Linear static analysis of perforated plates with round and staggered holes under their self-weights. Model of bimetallic perforated plate [3]. Keywords: bimetallic; fig; layer; plate; stress

• Experimental investigation of hardness of FSW and TIG joints of Aluminium alloys of AA7075 and AA6061 by Patil, Chetan; Patil, Hemant; Patil, Hiralal (2016) - This paper presents the effect variable rotational speed and transverse speed on hardness properties of similar FSW joints of AA7075-T651 and dissimilar FSW joints of AA7075-T651-AA6061-T6 and also comparison between FSW and TIG welding were studied. A hardness value has mixed result with respect to rotations speed and transverse speed for similar FSW joints. Keywords: alloys; friction; fsw; hardness; joints; speed; stir; tig; welding

• Degradation assessment of waterlogged wood at Haimenkou site by Jingran, Gao; Jian, Li; Jian, Qiu; Menglin, Guo (2014) - As is shown in Tab. 1, the maximum moisture content of ancient wood is 578.68%, 4.14 times of the healthy wood (139.64%), while the basic density of waterlogged wood (0.16 g/cm3) is only one-third of that of healthy wood (0.48 g/cm3), indicating that Haimenkou site waterlogged wood has a severe degradation. Tab. 2 shows the following conclusions: 1) The shrinkage rate of waterlogged wood from waterlogged state to full hardness (radial direction 8.16%, chordwise 24.74%) is obviously higher than healthy wood (radial direction 4.46%, chordwise7.76%), indicating that Haimenkou site ancient wood has severe shrinkage. Keywords: content; degradation; moisture; shrinkage; site; water; wood
• Tsunami numerical modeling and mitigation by Namdar, Abdoullah; Nusrath, Asima (2013) - METHODOLOGY AND MODELING here is two methods in understanding wave force applied to the structure or to any natural barrier, the first one is application of way theory and second is using fundamental fluid dynamics equations. The Morison equation could be used in estimating of wave force acting on offshore structure, it may be written as [6]. Keywords: coastal; tsunami; water; wave

• Numerical study of TRIP transformation in 35NCD16 steel-effects of plate orientation and some criteria by Gaci, Mounir; Kamel, Fedaoui; Baroura, Lazhar; Talhi, Amar (2021) - This have been achieved by the adaptation of the parameters introduced in the numerical calculation such as: the increase in the number of shear directions (twenty directions), the use of seven criteria to give the order of plate transformation, the mono grain model with regular grain boundary and an elastic and elstoplastic behavior of the austenitic and martensitic phases. The second mechanism given by Magee [10] explains the phenomenon of TRIP in the case of martensitic transformation by the variation in volume, resulting from the formation of plates during transformation, under the effect of an external weak stress (lower than the elastic limit of austenite) Keywords: 107(50 °; behavior; criteria; doi; martensitic; plasticity; plates; stress; transformation; trip

• Robust design of a polygonal shaft-hub coupling by Citarella, R.; Perrella, M. (2015) - In this work, the Taguchi method is applied for the optimal choice of design parameter values for a polygonal shaft-hub coupling. Control factors (matrix L4) Keywords: control; coupling; design; factors; fit; hub; noise; shaft; stress; value

• Sulla stima di macro, micro e nano-durezza di materiali metallici mediante analisi elasto-plastiche agli elementi finiti by Susmel, Luca; Taylor, David (2011) - è poi ottenuta una ulteriore semplificazione, considerando il penetratore come un corpo perfettamente rigido e indeformabile (e questo in virtù della elevata rigidezza del diamante comparata a quella dei metalli di cui si doveva eseguire la stima della durezza). Tali fenomeni, pertanto, non hanno consentito di estendere l’utilizzo della meccanica del continuo fino ad un livello nanoscopico per determinare correttamente i valori della durezza. Keywords: 316l; agli; aisi; alla; analisi; campo; carico; che; come; con; continuo; dei; della; della durezza; dell’impronta; dimensione; doi; durezza; elasto; elementi; essere; finiti; materiale; mediante; metallici; nano; nel; più; provini; può; questo; risultati; sia; sono; susmel; una; valore; vickers
• Rilievo in tempo reale di difetti superficiali su corpi in movimento a velocità elevata con ultrasuoni senza contatto by Cerniglia, D.; Nigrelli, V.; Mancuso, A.; Alberti, A. (2012) - i segnali con il disco in rotazione. dell’onda superficiale con il difetto. Keywords: cerniglia; che; con; contatto; dal; dei; del; delle; difetto; disco; laser; nel; onde; segnale; sono; superficiali; superficie; trasduttore; una
• Effetto delle dimensioni del cordone di saldatura sulla resistenza a fatica dei giunti a croce by Atzori, B.; Rossi, B.; Demelio, G. (2009) - a fatica al crescere dello spessore del cordone di saldatura. spessore del cordone di saldatura. Keywords: atzori; che; con; cordone; del; della; fatica; non; resistenza; risultati; saldatura; spessore
• Utilizzo della tensione di picco per la verifica a fatica dei giunti saldati d’angolo con il metodo degli elementi finiti by Meneghetti, G. (2009) - 8 che riproduce lo spessore degli elementi saldati e il profilo a V a spigolo vivo del piede del cordone. è stato applicato con successo all’analisi della resistenza a fatica di giunti saldati, sia in acciaio che in lega leggera, con rottura al piede del cordone di saldatura Keywords: acciaio; che; con; del; della; dimensione; d’angolo; elementi; fatica; fig; giunti; picco; resistenza; saldati; sono; tensione
• Il gradiente implicito nella verifica a fatica di giunzioni saldate sollecitate a fatica by Tovo, R.; Livieri, P. (2009) - I risultati della relativa elaborazione numerica del campo di tensione sono riportati in Fig. Con tale formulazione è possibile, utilizzare il picco di tensione direttamente per il calcolo del coefficiente di sicurezza senza incorrere in errori formali. Keywords: calcolo; che; con; cordone; della; efficace; equivalente; fatica; fig; giunzioni; gradiente; locale; nel; non; principale; problema; punto; soluzione; sono; tensione; tovo; una; valore
• Modello numerico per la simulazione e l’ottimizzazione di controlli non distruttivi con ultrasuoni by Pantano, A.; Cerniglia, D. (2013) - La distanza tra la superficie della rotaia e il trasduttore è 10 mm. la superficie della rotaia e il trasduttore non a contatto in nove istanti differenti. Keywords: aria; che; come; con; degli; dei; della; dove; elementi; essere; fig; finiti; fungo; laser; modello; molto; nel; non; onde; più; propagazione; questo; rotaia; senza; sono; spostamenti; superficie; tempo; tramite; trasduttore; ultrasonore; una
• Studio del danneggiamento mediante tomografia in luce del sincrotrone: impatto di un cono d’ombra sulla qualità finale delle ricostruzioni by Cosmi, Francesca; Scozzese, Salvatore; Bernasconi, Andrea (2013) - http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.13.02&auth=true F. Cosmi et alii, Frattura ed Integrità Strutturale, 13 (2010) 17-23; DOI: 10.3221/IGF-ESIS.13.02 21 CAMPIONE IN AL 5083 a seconda serie di tomografie ottenute con angoli di ricostruzione inferiori a 180° è stata effettuata su uno dei campioni studiati in [2, 3], in cui venivano presentati i risultati ottenuti nella ricostruzione di cricche di fatica multiassiale utilizzando la tecnica della tomografia in luce di sincrotrone. Rispetto ad una sorgente convenzionale, la possibilità di utilizzare una sorgente di luce di sincrotrone consente di migliorare la qualità dell'immagine, evitando effetti legati all'indurimento del fascio e consentendo misure quantitative sul campione in esame. Keywords: campione; che; cosmi; cricca; del; della; questo; ricostruzione; sono; una

• Previsione della resistenza a fatica in saldature per punti attraverso modellazione solida by Tovo, R.; Livieri, P.; Capetta, S. (2013) - o Dal punto di vista concettuale il metodo del raggio di raccordo è semplice da applicare ma impone di usare un raggio di raccordo relativamente piccolo rispetto allo spessore. Nel presente lavoro vengono messi a confronto due metodi idonei per la verifica di giunzioni saldate per punti: il metodo del raggio di raccordo fittizio ed il metodo del gradiente implicito. Keywords: con; del; della; fatica; fig; giunti; gradiente; implicito; metodo; raccordo; raggio; spessore; tensione

• An on-site teaching laboratory in a village damaged by the 2009 Abruzzo earthquake by Giresini, Linda; Sassu, Mauro (2018) - The activity program mainly involved two steps: the survey of structural building blocks and a careful survey of earthquake damages, starting from the analysis of previously compiled forms designed by the Civil Protection Department. Their activities were related to the elaboration of the data collected in 2010, completion of several surveys of masonry building blocks and hypogeal structures, and to structural analyses on buildings. Keywords: buildings; doi; earthquake; fig; figure; giresini; masonry; san; seismic; structures; students; survey
• Building irregularity issues and architectural design in seismic areas by Alecci, Valerio; De Stefano, Mario (2018) - Architectural design; Seismic areas; Building irregularity. Gehry’s buildings would be defined like “architectural sculptures” than simply like “buildings”: Guggenheim Museum of Bilbao (Fig. 9) or the Nationale-Nederlanden Building of Prague (Fig. 10), are today considered great sculptures more than architectural buildings. Keywords: architectural; buildings; design; earthquake; effects; engineering; irregularity; plan; structures; torsional
• Methodology to minimize the dynamic response of tall buildings under wind load controlled through semi-active magneto-rheological dampers by Brandão, Francisco da Silva; de Almeida, Alex Koch; Miguel, Letícia Fleck Fadel (2024) -  n n x t e t x t          (19) A. Almeida et alii, Frattura ed Integrità Strutturale, 69 (2024) 89-105; DOI: 10.3221/IGF-ESIS.69.07 96 in which  of t  is the vector of optimal forces at each instant of time, with the m optimal forces of and n control forces applied to the system. Q and R are called weighting matrices, high values for elements of Q mean prioritizing the reduction of the response over control forces, and high values for elements of R mean the opposite; in general, these values are obtained in a testing process aiming at the best result. Keywords: control; dampers; doi; engineering; force; l.f.f; miguel; optimization; semi; structures; wind

• An uncoupled thermoelasticity problem for a semi-infinite layer with regard of its proper weight by Fesenko, Anna; Vaysfeld, Nataly (2019) - Nh Nh DERIVING THE DISPLACEMENTS AND STRESS FORMULAS IN THE TRANSFORM DOMAIN AND THEIR INVERSION o, the transformation of the solution is constructed in the form of superposition          3 3 1 1 w ( ) w ( ), ( ) ( ),k k k k z z Z z Z z where S A. Fesenko et alii, Frattura ed Integrità Strutturale, 48 (2019) 768-792; DOI: 10.3221/IGF-ESIS.48.70 779   d chth (A4) where           * 2 2 2 2 0 0 0( , , , , ) ( ) ( ) ( ) ( )J t Keywords: h z; k k; layer; n z; t h; t t; t z; y z; z e; z f; z z; z ;  ;  ;  ;  ;  ;  ;  
• Effect of multi-layer prosthetic foam liner on the stresses at the stump–prosthetic interface by Boudjemaa, Ismail; Sahli, Abderahmane; Benkhettou, Abdelkader; Benbarek, Smail (2021) - Microsoft Word - numero_56_art_15_3029 I. Boudjemaa et alii, Frattura ed Integrità Strutturale, 56 (2021) 187-194; DOI: 10.3221/IGF-ESIS.56.15 187 Effect of multi-layer prosthetic foam liner on the stresses at the stump–prosthetic interface I. Boudjemaa, A. Sahli, A. Benkhettou, S. Benbarek Department of Mechanical Engineering, Laboratory Mechanics Physics of Materials (LMPM), University of SidiBel Abbes, BP 89, cite Ben M’hidi, SidiBel Abbes, 22000, Algeria ismailboubou000@gmail.com sahliabderahmen@yahoo.fr, http://orcid.org/0000-0002-5183-1168 aekben.dz@22gmail.com sma_benbarek@yahoo.fr, http://orcid.org/0000-0002-5420-9144 ABSTRACT.The prosthetic liner plays a significant role in the redistribution of the pressure between the stump and the socket, as adds a cushioning layer between the stump and the socket which relieves pain and makes the prosthesis more comfortable. The distributions of displacement in all six cases of multi-layer prosthetic foam liner allow knowing the capacity of these liners to support the patient's weight. Keywords: doi; foam; interface; layer; liner; socket; stump

• Structural interventions on the drums of the Parthenon’s north colonnade by Mentzini, Marilena (2017) - According to this method fragments of authentic marble or/and supplements of new marble are joined together using titanium bars and suitable cement mortar The final join was accomplished by inserting titanium bars which were parallel to the member’s upper side from the new fractured area created (for the sake of the volume’s formation). Keywords: bars; drum; marble; reinforcement; restoration; supplement; titanium; titanium bars; upper; volume

• Double initial and caustic curves in diametrically compressed transparent discs - Application to the contact length by Markides, Christos (2019) - λ C            3 Ch. F. Markides, Frattura ed Integrità Strutturale, 50 (2019) 451-470; DOI: 10.3221/IGF-ESIS.50.38 463 4 2 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 1 1 1 2 1 2 1 2 1 2 27 6 f r t f r t m f r t f r t m f r t m f r t f r t m f r t m f r t f r t m f r t f r t f r t m f r t D f r t m f r t m f r t f r t f r t f r t m f r t f r t m f r t m f r t m f r t f r t m f r t f r t C C λρ λ KR λ C C C λ C λρ λ KR λ C λ C                  Keywords: caustics; contact; f f; f r; initial; m f; o f; r t; r θ; t -axes; t c; t f; t m; t t;  

• Revisiting classical concepts of Linear Elastic Fracture Mechanics - Part III: The stress field in a double-edge notched finite strip by means of the “stress-neutralization” technique by Markides, Christos; Kourkoulis, Stavros K (2024) - i α c (4)                       2 2 2 2 2 2 o 3 2 22 2 σ α c α(3iz 4α ) Substituting from Eqns.(8, 9, 10) in Eqns.(11) it can be seen that along the notches only the σξη component is non-zero, while σηη=σξη=0, fulfilling the boundary condition for stress free notches. Keywords: doi; field; fig; notches; parabolic; problem; solution; stress; strip;  

• 2D size, position and shape definition of defects by B-scan image analysis by Scafidi, Michele; Cerniglia, Donatella; Ingrassia, Tommaso (2015) - Figure 2: Cross-section of a plate with indication of laser source, laser receiver and wave paths. Actually, this effect is caused by the superposition of the longitudinal wave, L-wave, and the reflected wave due to the defect, LR-wave. Keywords: defect; fig; image; laser; scan; section; wave

• Cracking Patterns of Brittle Hemispherical Domes: an Experimental Study by Cao, Siwen; Sipos, Andras A. (2021) - The safety of cracked domes has a long track record; the evolution of the cracking pattern received less attention. As cracks in domes are mainly tensile cracks Keywords: alii; cao; cao et; cracks; doi; dome; ed integrità; esis.59.20; et alii; frattura ed; igf; integrità strutturale

• The development and application of an original 3D laser scanning: a precise and nondestructive structural measurements system by Li, Kexin; Wang, Jun; Qi, Dawei (2019) - The detection technology of 3D laser scanning by adding 2D laser sensor to the 1D transmission actuator has achieved good research results [24-25]. Type of ball screw Gocator-2080 Model of laser sensor 40X 40 times magnification Keywords: 3d laser; detection; figure; image; laser; measurement; scanning; sensor; structural; system; technology

• Analysis of spatial vibrations of piezoceramic eccentric cylindrical shells interacting with an annular fluid layer by Lekomtsev, Sergei; Bochkarev, Sergey; Senin, Alexander (2019) - Analysis of spatial vibrations of coaxial cylindrical shells partially filled with a fluid, Comput. The vibrations of coaxial cylindrical shells with a clearance partially filled with fluid, Mechanics. Keywords: doi; fluid; gap; phase; shells
• Influence of dipping time on cracking during bending of hot dip galvanized coatings with Sn and Ti contents by Di Cocco, V.; Zortea, L. (2013) - Zn bath; b) Z 11) and focus Fig. 1). nology, 168 (2 6) 0.3221/IGF-ESIS. tions, and cra om the “classi ved: in “like ” ph r layer interfa gs obtained u y phase) does , probably du ase of the coa omechanisms M (Light Op n influence to ars with diffe ance, for all tance. Keywords: bath; coatings; cocco; fig; grey; phase

• Resonances detected on a historical tower under bells’ forced vibrations by Foti, Dora; Ivorra, Salvador; Diaferio, Mariella; Bru, David; Vacca, Vitantonio (2018) - Medici bell tower: Masonry bell towers: Dynamic considerations, Proc. Keywords: bell tower; bells; direction; fig; frequencies; ivorra; swinging; tower

• Justification of fracture criteria for salt rocks by Baryakh, Alexander; Tsayukov, Andrey (2022) - c c c c c c c c c c c c                                                       (18) The corresponding TCP algorithm parameters in the principal stresses for the criterion [23] are determined by: c t c t c t                                   1 2 3 2 1 3 3 1 2 2 N N 2 2  (46) Keywords: c c; c t; criterion; yield;  ;  ;  ;  ;  

• Graphite nodules features identifications and damaging micromechanims in ductile irons by De Santis, Alberto; Iacoviello, Daniela; Di Cocco, Vittorio; Iacoviello, Francesco (2013) - The pearlitic matrix – graphite nodule debonding (Fig. 1 - V1) is characterized by a debonding nucleation that is obtained for loading conditions that corresponds to the elastic stage: debonding nucleation is evident in the nodule “pole” and becomes more and more evident with the increase of the macroscopic deformation. The importance of the different damaging micromechanisms is influenced by the matrix microstructure, but it is worth to note that, considering ferritic-pearlitic ductile irons, matrix – graphite nodule debonding is not the most important damaging micromechanism. Keywords: graphite; image;  
• Defect detection of wire rope for oil well based on adaptive angle by Jijun, Zhang; Xiangqing, Meng (2015) - Microsoft Word - numero_34_art_65 Z. Jijun et alii, Frattura ed Integrità Strutturale, 34 (2015) 590-598; DOI: 10.3221/IGF-ESIS.34.65 590 Defect detection of wire rope for oil well based on adaptive angle Zhang Jijun, Meng Xiangqing Southwest Petroleum University, China 790100588@qq.com, 842676523@qq.com ABSTRACT. INTRODUCTION s a flexible component, wire rope has been widely used in engineering. Keywords: edge; filtering; image; rope; wire

• Mixed methods for viscoelastodynamics and topology optimization by Maurelli, Giacomo; Maini, Nadia; Venini, Paolo (2014) - As to the stresses, one should notice that the symmetry of the stress tensor is imposed strongly so that the components to be approximated are 11 22 12, ,   and one ends up with 24 degrees-of-freedom:  the three components of the stress tensor 11 22 12, ,   at each vertex of the triangle (9 dofs),  the moments of order zero and one of the traction vector n  along each edge of the triangle (12 dofs),  the averages of the components of the stress tensor over the triangle, i.e. 11 22 12, , T T T      (3 dofs). Viscoelasticity; Mixed finite elements; Topology optimization. Keywords: elements;  ;  

• Design and experimental characterization of a 350 W High Temperature PEM fuel cell stack by Zuliani, N. (2013) - d heat mana s research has M fuel cells, n be simplifie ncreased temp ergy source; ( acid membra midification is he performan .3221/IGF-ESIS.1 lybenzimidaz 0 °C. A me trol the stack 011) 29-34; DO this kind of f cell system [ l operated wi or temperature Similar resul er to membra uel cell stack [ related to se tion, an incre ent the main membranes, f features that w ck, has 25 ce polar plates an ea of 50 cm2 re than 95 wt de [15]. Keywords: cell; cm2; density; fuel; hydrogen; mean; pem; power; stack; voltage

• Elastic surface crack interaction and its engineering critical assessment within the framework of fitness-for-service standards by Coêlho, Gabriel; Silva, Antonio ; Santos, Marco (2022) - A higher amplification was found at the coplanar horizontal distance on which crack interaction is to be considered meaningful, which indicates inconsistency regarding the interaction criteria used on FFS standards. Within the linear elastic fracture mechanics, an evaluation of the influence of crack interaction can be computed by the interaction factor, such that,  intK γ= K (1) where Kint and K∞ are the stress intensity factors considering a crack interacting with another and the same crack under no interaction, respectively. Keywords: amplification; cracks; doi; factor; flaw; interaction; stress

• A magnetorheological clutch for efficient automotive auxiliary device actuation by Bucchi, F.; Forte, P.; Frendo, F.; Squarcini, R. (2012) - During tests, the oil temperature was imposed at 120°C and the torque was measured at several steady speed values for both the current production and innovative vacuum pump, and the data were interpolated by a piecewise function. Torque absorbed by current production, innovative vacuum pumps and A and B prototypes. Keywords: bucchi; clutch; fig; power; pump; speed; torque; vacuum; vacuum pump

• Mechanical performance of intelligent asphalt mixture utilizing rejuvenator encapsulated method by Ali, Sari Sharif; Arabani, Mahyar; Latifi, Hassan (2020) - Rejuvenator capsule; Nano-Zycosil; Indirect tensile; Encapsulation procedure; Moisture resistance. So, the encapsulation procedure used in this study was a T S.S. Ali et alii, Frattura ed Integrità Strutturale, 55 (2021) 187-197; DOI: 10.3221/IGF-ESIS.55.14 196 successful technique to build rejuvenator capsules. Keywords: aggregates; asphalt; binder; capsules; doi; fig; mixture; nano; zycosil

• Numerical analysis of soil bearing capacity by changing soil characteristics by Namdar, Abdoullah; Pelko, Mehdi Khodashenas (2013) - I http://dx.medra.org/10.3221/IGF-ESIS.10.05&auth=true http://www.gruppofrattura.it mailto: sina_a_n@yahoo.com A. Namdar et alii, Frattura ed Integrità Strutturale, 10 (2009) 38-42; DOI: 10.3221/IGF-ESIS.10.05 39 METHODOLOGY AND EXPERIMENTS y adopting of Terzaghi method and altering characteristics of soil such density, cohesion, angle of friction of soils and dimension of foundation safe bearing capacity of soil foundation has been evaluated. Nearly 340 foundations by adopting Terzaghi method have been calculated and the results presented in form of tables and graphs, the result helps better understanding of improving of soil foundation bearing capacity. Keywords: bearing; capacity; foundation; soil

• Hydrogen Re-Embrittlement of Aerospace grade High Strength Steels by Valentini, R.; Colombo, C.; De Sanctis, M.; Lovicu, G. (2012) - Conversely, Maraging steels resistance to HRE hasn't been characterized yet. Cylindrical unnotched specimens (3 mm of diameter and 25 mm of gage) were used for HRE tests. Keywords: 4340; aisi; hydrogen; peak

• Effetto supporto, tensione locale e gradiente relativo di tensione nella predizione della vita a fatica by Reggiani, B.; Freddi, A. (2013) - http://www.gruppofrattura.it http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.04.01&auth=true Keywords: http://www.gruppofrattura.it
• Effect of Carbon and Nitrogen content on deformation and fracture of AISI 304 austenitic stainless steel by Molinari, A.; Composta, M.; Menapace, C. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.04.02&auth=true http://www.gruppofrattura.it http://www.gruppofrattura.it Keywords: http://www.gruppofrattura.it
• Dalla Frattura alla Scienza dei Metalli by Cavallini, M. (2013) - http://www.gruppofrattura.it http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.04.03&auth=true Keywords: http://www.gruppofrattura.it
• A model for steady state stage III creep regime at low-high stress/temperature range by Esposito, L.; Bonora, N. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.05.02&auth=true http://www.gruppofrattura.it http://www.gruppofrattura.it Keywords: http://www.gruppofrattura.it
• Propagazione di fratture longitudinali in gasdotti caratterizzati da bassa duttilità by Minotti, M.; Salvini, P.; Demofonti, G. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.05.04&auth=true http://www.gruppofrattura.it http://www.gruppofrattura.it Keywords: http://www.gruppofrattura.it
• L'infragilimento da idrogeno. Un caso di studio In una barra di comandi di un velivolo dell'aviazione generale. by Amura, M.; Di Paolo, V.; Bernabei, M.; Colavita, M.; Aiello, L. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.05.01&auth=true http://www.gruppofrattura.it http://www.gruppofrattura.it Keywords: http://www.gruppofrattura.it
• Un approccio innovativo per l'analisi quantitativa delle superfici di frattura a fatica nelle ghise sferoidali mediante elaborazione di immagini. by De Santis, A.; Iacoviello, D.; Di Cocco, V.; Di Bartolomeo, O. (2013) - http://dx.medra.org/10.3221/IGF-ESIS.05.03&auth=true http://www.gruppofrattura.it http://www.gruppofrattura.it Keywords: http://www.gruppofrattura.it
• On the relationship between J-integral and CTOD for CT and SENB specimens by Kudari, S. K.; Kodancha, K.G. (2013) - http://www.gruppofrattura.it http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.06.01&auth=true d n Keywords: http://www.gruppofrattura.it
• Inferenza bayesiana per l'analisi dei dati di prove di fatica by De Iorio, A.; Guida, M.; Penta, F.; Pinto, P. (2013) - http://www.gruppofrattura.it http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.06.02&auth=true Keywords: http://www.gruppofrattura.it
• A new method for the experimental study of fatigue behaviour of thermoplastic materials by Basso, M.; Crevatin, A.; Celotto, M.; Sanità, M. (2013) - http://www.gruppofrattura.it http://www.gruppofrattura.it http://dx.medra.org/10.3221/IGF-ESIS.06.03&auth=true Keywords: http://www.gruppofrattura.it

• Mechanical Stability Investigation of Advanced Composite Plates Resting on Elastic Foundations Using a New Four-Unknown Refined Theory by khalfi, Yassine; BOUCHIKHI, Aboubakar Seddik; BELLEBNA, Yassine (2019) - In company with studies of buckling behavior of plate, many plate theories have been developed. Comparisons are made with different plate theories available in the literature Keywords: b b; b s; theory; w w; y y;  ;  ;  
• Vibration analysis of functionally graded plates with porosity composed of a mixture of Aluminum (Al) and Alumina (Al2O3) embedded in an elastic medium by Saidi, Hayat; Sahla, Meriem (2019) - k z k f z k k k                                                      (20) where 2 2 11 11 66S A A   ,  12 12 66S A A  ,  2 2 2 13 11 12 662S B B B       ,  2 2 2 14 11 12 662s s sS B B B       2 2 22 66 22S A A   ,  2 2 2 23 11 12 662S B B B       ,  2 2 2 24 11 12 662s s sS B B B       , (21) 4 2 2 4 2 2 33 11 12 66 222( 2 ) ( )w sS D D D D K K            , 4 2 2 4 34 11 12 66 222( 2 )s s s sS D D D D       , 4 2 2 4 2 2 44 11 12 66 22 55 442( 2 )s s s s s sS H H H H Keywords: doi; plates; s s; theory;  

• Design and characterization of a fractal-inspired multi-frequency piezoelectric energy converter by Castagnetti, Davide (2012) - Energy harvesting; Piezoelectric converter; Multi-frequency structures; Fractal geometry; Power generation. [12-15], for piezoelectric converters since it generates large deflection strains when operated at its fundamental frequency and a desired eigenfrequency can be easily obtained varying its length or introducing an appropriate proof mass [16-18]. Keywords: converter; eigenfrequency; fig; lamina; piezoelectric; power

• Properties and applications of Magnetorheological fluids by Spaggiari, A. (2012) - While the applications of MR fluids are relevant for engineers and can be used in many damping devices, the ferrofluids are mainly a fancy stuff to play with for artist and kids. Bearing a load is possible only because MR fluids can modify their aggregations states changing from a viscous free-flow liquid to a quasi solid state. Keywords: applications; fig; fluid; magnetic

• Optimization of fractional composition of the excipient in the elastomeric covering for asphalt highways by Nurullaev, E.M.; Ermilov, A. S. (2013) - I x x       T http://dx.medra.org/10.3221/IGF-ESIS.24.06&auth=true http://www.gruppofrattura.it E. M. Nurullaev et alii, Frattura ed Integrità Strutturale, 24 (2013) 69-74; DOI: 10.3221/IGF-ESIS.24.06 71 herein , , q d   : vectors of volume fractions, sponginess and particle sizes of fractions of dispersible components as a part of a polymeric material respectively; opt j : optimum volume fractions of fraction an filler in structure; jv : volume fraction v : fraction by j -type an filler in structure; jm : number of j-type fractions of a dispersed component; min max, jv jv  : respectively the lower and upper bounds for volume fractions of fractions of solid components in structure; opt jx : optimum for the corresponding block of characteristics, for example, mechanical, mass concentration of firm disperse components in polymeric composition; j : density of disperse components; nI : a set of the indexes belonging to types of a filler, entering into a compounding of a polymeric material. j j m opt j j j j jm jv v              min max0 1, 1, 2, 3, ..., jv jv jv jv m       with j nI  / / n opt j jopt j opt j j j Keywords: composition; filler; fractions; j j; opt; volume

• Notiziario IGF n.19 by Iacoviello, Francesco (2013) - G.: Comunicazioni del Presidente Punto 4 all’O.d. G.: Relazione Annuale del Presidente Punto 5 all’O.d. Keywords: all’o.d.g; punto

• 3D Stress intensity factor and T-stresses (T11 and T33) formulations for a Compact Tension specimen by Kudari, S. K.; Kodancha, K. G. (2016) - From this third order polynomial fit, the relation between KI-max, a/W and  can be expressed as: IK a a a W W The details of extraction of stress 3D stress intensity factor (KI) and T-stresses are discussed elsewhere [11,12,16,17]. Keywords: max; t11;  ;  

• The effect of energy director on ultrasonic consolidation of multilayered composites (laminates) made from unidirectional PEEK/CF prepregs by Panin, Sergey; Alexenko, Vladislav (2025) - 10.3221/IGF-ESIS.75.22 315 The effect of energy director on ultrasonic consolidation of multilayered composites (laminates) made from unidirectional PEEK/CF prepregs V.O. Alexenko, S.V. Panin Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia vl.aleksenko@mail.ru, http://orcid.org/0000-0003-4375-9132 svp@ispms.ru, http://orcid.org/0000-0001-7623-7360 KEYWORDS. However, such procedures are quite time consuming and expensive, so ultrasonic welding (USW) or ultrasonic consolidation might be implemented in some cases. Keywords: doi; eds; fig; ilss; laminates; prepregs; tus

• An ideal model for stress-induced martensitic transformations in shape-memory alloys by Marino, Michele (2014) - d r r r r t d t d t r t r d r                            D E E                                       (24) 2 max 1 ( ) if > Unloading ε [ε ,0] : ( ) if < if d D d r r r R r r R E E                                       (25) and the corresponding evolution of single-oriented martensitic microstructure 2 is M. Marino, Frattura ed Integrità Strutturale, 29 (2014) 96-110; DOI: 10.3221/IGF-ESIS.29.10 107 max 2 0 if Loading ε [0,ε ] : ( ) if < 1 if > d d d Keywords: d d; r r; transformation;  ;  ;  ;  

• Review of the Influence of non-singular higher order terms on the stress field of thin welded lap joints and small inclined cracks in plates by Berto, F.; Ayatollahi, M.R.; Vantadori, S.; Carpinteri, A. (2017) - [9] Christopher, C.J., James, M.N., Patterson, E.A., Tee, K.F., Towards a new model of crack tip stress fields, Int. Mean values of the strain energy density over the control volumes for welded lap joints, with F/(t1)=10 MPa; values based on T* determined on the ligament, close to the point of singularity, r  0.03 mm Figure 2: Stress field along the ligament line for the case d/t=1 and t=1 mm. Keywords: cos; r r; sin; stress;  

• On numerical integration for effective stress assessment at notches by Maggiolini, Enrico; Livieri, Paolo; Tovo, Roberto (2013) - MESH INFLUENCE further problem regarding the numerical assessment of non-local effective stress is the sensibility of results to the elements dimension. This paper presents a numerical method for non-local stress assessment by means of a general FE tool and the local stress field. Keywords: int; stress; sum; σeff

• Workshop IGF "Fatica nelle giunzioni saldate (...e non)" by Iacoviello, Francesco (2013) - Shot Peening Processes to obtain Nanocrystalline surfaces in metal alloys: Frattura ed Integrità Strutturale, 8 (2009) 2 Il 9 ed il 10 marzo 2009 si è svolto a Forni di Sopra, provincia di Udine, il Workshop IGF dal titolo “Progettazione a fatica di giunzioni saldate (… e non)”. Non mancate, a presto Francesco Iacoviello Segretario IGF Il 9 ed il 10 marzo 2009 si è svolto a Forni di Sopra, provincia di Udine, il Workshop IGF dal titolo “Progettazione a fatica di giunzioni saldate (… e non)”. Keywords: dal; sessione

• The multi-layered ring under parabolic distribution of radial stresses combined with uniform internal and external pressure by Markides, Christos F.; Pasiou, Ermioni D.; Kourkoulis, Stavros K. (2017) -                                                                    1 ( ) ( ) ( ) ( 1) ( 1) ( 1)3 1 3 1 1 1 1 1 1 1 13 1 1 3 1 1 1 ( ) ( ) ( ) ( 1) ( 1) ( 1)3 1 3 3 1 3 1 1 1 1 1 1 13 1 3 3 1 3 0 3 3 0 0 j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j R a R a R b R a R a R b R a R a R b R a R a R b                        ( ) ( ) ( 1) ( 1)2 2 2 1 1 1 12 2 2 2 , 1, 2,..., 1 0j j j j j j j j j n a R b R a R b (16) (where, obviously, all coefficients appearing in Eqs.(16) are zero) Keywords: j j; j jk; j r; k j; k k; k r; r b; r r; ring;  ;  ;  ;  ;  ;  

• Construction of Analytical Eigensolutions for Isotropic Conical Bodies and Their Application for Estimation of Stresses Singularity by Korepanova, Tatyana; Matveenko, Valerii; Shardakov, Igor (2019) - m m m m m m R m m R m m R R m                                    (17) From the condition of existence of non-zero solution for 0R we obtain the characteristic equation: (  2 2 (1) (1) (1) (1) 1 2 0 2 2 1 2 2 3 2 , 0, 1 1 4 1m m m m m m m R R R m R m m m m                    (19) Here in after, the superscript will denote the number of the partial solution. Keywords: cone; k k;  ;  ;  ;  ;  

• Damages to stent stabilized left ventricular pacemaker electrodes during simulated lead extraction by Laczkó, Romola; Balázs, Tibor; Bognár, Eszter; Ginsztler, János (2013) - F http://dx.medra.org/10.3221/IGF-ESIS.16.03&auth=true http://www.gruppofrattura.it R. Laczkó et alii, Frattura ed Integrità Strutturale, 16 (2011) 28-33; DOI: 10.3221/IGF-ESIS.16.03 31 4.5/30 mm stent Coronary stent; Left ventriculal pacemaker electrode; Simulated lead extraction. Keywords: electrode; lead; pacemaker; stent

• Elastic wave propagation and stop-band generation in strongly damaged solids by Carta, G.; Brun, M.; Movchan, A.B. (2014) - [10] Gei, M., Jones, I.S., Movchan, A.B., Junction conditions for cracked elastic thin solids under bending and shear, Q. J. Mech. CONCLUSIONS n this paper, we have examined the dynamic properties of elongated elastic solids with a distributed damage, studied as two-dimensional strips with equally-spaced cracks. Keywords: solid;  

• Vibration control in buildings under seismic excitation using optimized tuned mass dampers by Brandão, Francisco da Silva; Miguel, Letícia Fleck Fadel (2020) - Learn more Safari Microsoft Edge Mozilla Firefox Opera Google Chrome Remind me later About Copyright Contact us Terms Privacy Policy & Safety © 2025 Google LLC Update it to get the best YouTube experience and our latest features. Keywords: browser

Epilogue

For more detail, about this study carrel, see the computed home page. For more detail about study carrels in general, see the read me file.

Created: 2025-12-27