Prediction of fatigue crack initiation and propagation based on micro-plasticity

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Predicting the mechanical fatigue phenomena of materials subjected to cyclic stresses, the mechanisms on generation and accumulation of inelastic deformation has to be clarified. In this study, numerical study based on both macro- and crystal-plasticity FE modeling are conducted to evaluate the mechanical responses under cyclic loading condition. Then, the effects of inclusions on the fatigue behavior at the stress level lower than the yield stress, i.e macroscopically elastic condition, was simulated and compared with the experimental result of a carbon steel.