Verification Simulation Considering Strain Rate Dependency and Strength-Differential Effect of PA66 Nylon

Abstract

Our research group has developed a dynamic constitutive model considering hydrostatic stress dependence and strain rate dependence and implemented in LS-DYNA using user-defined routines. On the other hand, Mimura et al. clarified strain rate dependence and hydrostatic stress dependence (influence of SD effect) on flow stress for PA66 nylon through high-speed material testing in tension and compression. In this study, we derived material parameters of this dynamic constitutive model from their test results. And we performed dynamic simulation applied this constitutive model implemented in LS-DYNA and verified the validity of this constitutive model and its material parameters.