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• W3104881370 abstract "Hydrogen absorption can deteriorate the mechanical properties of the material at high temperature and high pressure. This deterioration phenomenon, termed as hydride-induced embrittlement, involves the simultaneous operation of diffusion of hydrogen, precipitation of hydride, mechanical deformation, and fracture in the material. In this work, hydride-induced embrittlement is modeled at the crack tip by coupling of the hydrogen diffusion and mechanical deformation in the extended finite element method (XFEM) framework. XFEM is the most suitable method to model the cracks in the coupled problems because it does not require conformal mesh and re-meshing for crack growth. The chemical potential required for hydrogen diffusion in the crack tip region depends on the hydrostatic stress gradients. The effect of hydride-induced embrittlement on the crack tip of edge crack specimen is performed in the present work. The formulation consists of two steps—first step is to determine the hydrostatic stress field from the mechanical deformation process which is used in second step to evaluate the hydrogen concentration, hydride fraction, and stress triaxiality. This is an iterative process applied at each time interval until the solution converges. The numerically obtained values of stress trace in the hydride precipitation zone are compared with the literature, and are found in good agreement." @default.
• W3104881370 created "2020-11-23" @default.
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• W3104881370 date "2020-11-14" @default.
• W3104881370 modified "2023-09-24" @default.
• W3104881370 title "Numerical Study of Coupled Elasto-Plastic Hydrogen Diffusion at Crack Tip Using XFEM" @default.
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• W3104881370 doi "https://doi.org/10.1007/978-981-15-8315-5_16" @default.
• W3104881370 hasPublicationYear "2020" @default.
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