ショートプレゼン1

[P01-18] Fully implicit stress-update algorithm for extended subloading surface model incorporating nonhardening plastic strain region

*Takuya Iguchi¹, Taiki Sato¹, Jiahua Luo¹, Yuki Yamakawa¹ (1. Tohoku University)

Keywords:Extended subloading surface model, Nonhardening plastic strain region, Return-mapping, Stabilization of hysteresis loop

In this study, a novel implicit stress-update algorithm of the subloading surface model,a class of unconventional plasticity modes, incorporating the nonhardening plastic strain region is developed to improve the predictive capability for cyclic loading property.A numerical algorithm for stress calculation using return mapping is developed, in which we devise a novel scheme consisting of scheme consisting of hardening/nonhardening judgment, substep technique, and nested iteration to update variables associated with nonhardening plastic strain region.