To develop a plastic constitutive equation for general plastic deformation analysis, it is useful to confirm that the constitutive equation is viable for analyzing mechanical ratcheting in which a small strain accumulates along with cyclic loading. Many constitutive models and analyses on mechanical ratcheting have been proposed. However, most models do not consider distortion and rotation of the subsequent yield surface observed in the process of ratcheting deformations. In this study, behaviors of both the subsequent yield surface and the ratcheting deformations have been experimentally evaluated for the initially isotropic metals of SUS316FR stainless steel, 6-4 brass and S25C mild steel, which were subjected to biaxial mechanical ratcheting. Simulation analysis of biaxial ratcheting was conducted based on real behaviors of the subsequent yield surfaces such as swing rotation, translation, and distortion observed in ratcheting, and the two-surface hardening rule. The reliability of the proposed plastic constitutive model was verified by comparing the numerical results with the corresponding experimental results.

为了开发用于一般塑性变形分析的塑性本构方程，确认本构方程对于分析机械棘轮是有用的，其中小应变随着循环载荷的积累而累积。已经提出了许多关于机械棘轮的本构模型和分析。然而，大多数模型没有考虑在棘轮变形过程中观察到的后续屈服面的扭曲和旋转。在这项研究中，对 SUS316FR 不锈钢、6-4 黄铜和 S25C 低碳钢的初始各向同性金属进行了双轴机械棘轮作用，随后的屈服面和棘轮变形的行为已通过实验进行了评估。基于棘轮中观察到的后续屈服面的真实行为，如摆动旋转、平移和扭曲，以及两表面硬化规则，对双轴棘轮进行了仿真分析。通过将数值结果与相应的实验结果进行比较，验证了所提出的塑性本构模型的可靠性。