第二部門：計算力学（A)

[S02A-06] Implicit numerical integration of the Yoshida-Uemori two-surface plasticity model with isotropic hardening stagnation

*Riccardo Fincato¹, Seiichiro Tsutsumi¹, Alex Zilio², Gianluca Mazzucco², Valentina Salomoni² (1. JWRI, Osaka university, 2. DICEA, Padova University)

キーワード：Two-surface plasticity model, return mapping, workhardening stagnation

The work presented in this paper deals with the numerical investigation and implementation of the two-surface plasticity model (or bounding surface model). This plasticity theory is able to describe the deformation behaviour of large-strain cyclic plasticity and the stress-strain responses at small-scale re-yielding after large pre-straining. A novel strategy to model the isotropic hardening stagnation is developed within a fully implicit integration scheme in order to speed up the computation and to improve the material description.