This article simulates the low cycle fatigue behavior of 304L SS that exhibited initial hardening, softening, saturation, and significant secondary hardening. The combined non-linear isotropic and kinematic hardening model has been modified, implemented in ABAQUS, and validated with experimental results. New non-dimensional functions were introduced in the constitutive laws such that both isotropic and kinematic hardening behaviors depend on the accumulated plastic strain and maximum plastic strain range memory. The proposed isotropic hardening equation additively decomposes the cyclic hardening behavior into hardening, softening, and secondary hardening parts and captures the cyclic peak stress variation throughout the fatigue life well. Fatigue life is well predicted from the simulated loops.

中文翻译：

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低周疲劳下 304L SS 的修正各向同性和运动硬化方程

本文模拟了 304L SS 的低周疲劳行为，表现出初始硬化、软化、饱和和显着的二次硬化。非线性各向同性和运动学硬化组合模型已经过修改，在 ABAQUS 中实现，并通过实验结果进行验证。在本构定律中引入了新的无量纲函数，使得各向同性和运动硬化行为都取决于累积塑性应变和最大塑性应变范围记忆。所提出的各向同性硬化方程将循环硬化行为分解为硬化、软化和二次硬化部分，并很好地捕获了整个疲劳寿命中的循环峰值应力变化。通过模拟循环可以很好地预测疲劳寿命。