Phenomenological cyclic plasticity model for high cycle fatigue

The plastic stretching within a yield surface has to be described to simulate mechanical fatigue phenomena under macroscopically elastic condition, while the plastic strain is induced remarkably as the stress approaches the dominant yielding state. In this study, an unconventional plasticity model is proposed for the description of the cyclic loading behavior observed during the so-called high-cycle fatigue subjected to the cyclic stresses lower than the yield stress. The extended elasto-plastic model is applied for materials obeying not only isotropic but also kinematic hardening law and its mechanical responses under cyclic loading conditions are examined briefly.