id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
fis-1282	Toribio, J.; Lorenzo, M.; Vergara, D.; Kharin, V.	Numerical analysis of hydrogen-assisted rolling-contact fatigue of wind turbine bearings	2014	8	.pdf	application/pdf	3541	136	53	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).	cache/fis-1282.pdf	txt/fis-1282.txt