Abstract
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.
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Kumar, S., Shedbale, A.S., Singh, I.V. et al. Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM. Front. Struct. Civ. Eng. 9, 420–440 (2015). https://doi.org/10.1007/s11709-015-0305-y
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DOI: https://doi.org/10.1007/s11709-015-0305-y