id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
fis-117	Benvenuti, E.; Tovo, R.; Livieri, P.	A brittle fracture criterion for PMMA V-notches tensile specimens based on a length-enriched eXtended Finite Element approach	2013	9	.pdf	application/pdf	3258	176	59	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 .	cache/fis-117.pdf	txt/fis-117.txt