STRESS-STRAIN RELATION SIMULATION METHOD, STRESS-STRAIN RELATION SIMULATION SYSTEM, AND STRESS-STRAIN RELATION SIMULATION PROGRAM WHICH USE CHABOCHE MODEL

摘要

In this simulation method, a plastic strain is calculated from stress data and strain data, and a plastic strain rate is calculated from the temporal change of the plastic strain. A viscosity function with the plastic strain rate as a parameter is set, and an isotropic hardening model with the plastic strain as a parameter is set. Further, in this simulation method, the viscosity function and the isotropic hardening model are introduced into a yield stress of a dynamic constitutive equation of the Chaboche model, and a material constant of the dynamic constitutive equation is determined by a global nonlinear numerical optimization method. Furthermore, in this simulation method, a stress and a strain are calculated using the determined dynamic constitutive equation.