Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM
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
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.
XFEM / von-Mises yield criterion / isotropic hardening / fatigue crack growth / J-integral
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