In this paper, elasto-plastic XFEM simulations have been performed to evaluate the fatigue life of plane crack problems in the presence of various defects. The stress-strain response of the material is modeled by Ramberg-Osgood equation. The von-Mises failure criterion has been used with isotropic hardening. The J-integral for two fracture modes (mode-I and mode-II) is obtained by decomposing the displacement and stress fields into their symmetric and antisymmetric parts, then individual stress intensity factors are extracted from J-integral. The fatigue life obtained by EPFM is found quite close to that obtained by LEFM.
. [J]. Frontiers of Structural and Civil Engineering, 2015, 9(4): 420-440.
Sachin KUMAR,A. S. SHEDBALE,I. V. SINGH,B. K. MISHRA. Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM. Front. Struct. Civ. Eng., 2015, 9(4): 420-440.
plate with an edge crack, inclusions and minor cracks
25128
25.74
26078
24.51
plate with an edge crack, holes, minor cracks and Inclusions
21268
37.14
22102
36.02
Tab.4
Fig.28
Fig.29
Fig.30
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