Constitutive Modeling for Uniaxial Time-Dependent Ratcheting of SS304 Stainless Steel

Based on the experimental results of uniaxial time-dependent ratcheting behavior of SS304 stainless steel at room temperature and 973K,a new time-dependent constitutive model was proposed.The model describes the time-dependent ratcheting by adding a static/thermal recovery into the Abdel-Karim-Ohno non-linear kinematic hardening rule.The capability of the model to describe the time-dependent ratcheting was discussed by comparing the simulations with the corresponding experimental results.It is shown that the revised unified viscoplastic model can simulate the time-dependent ratcheting reasonably both at room and high temperatures.