Abstract In this paper, a SiMo 4.06 cast iron is subjected to Low-Cycle Fatigue (LCF) loading and Thermo-Mechanical Fatigue (TMF) loading in the temperature range between 20 °C and 650 °C. Strain-controlled experiments were performed for various strain rates, with and without a tensile strain dwell. A modified unified viscoplastic material model is proposed for simulating the temperature- and time-dependent cyclic behaviour of the material. The constitutive model is based on the non-linear kinematic hardening rule of Chaboche, in which several features are added in order to incorporate strain rate sensitivity, the strain range dependency of the cyclic hardening and the elastic modulus, static recovery and mean stress evolution. A good correlation was achieved between the simulated results and the experimental results.

中文翻译：

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等温低周疲劳蠕变和热机械疲劳载荷条件下 SiMo 4.06 铸铁的统一粘塑性建模

摘要 在本文中，SiMo 4.06 铸铁在 20 °C 至 650 °C 的温度范围内承受低周疲劳 (LCF) 载荷和热机械疲劳 (TMF) 载荷。对各种应变率进行应变控制实验，有和没有拉伸应变驻留。提出了一种改进的统一粘塑性材料模型，用于模拟材料的温度和时间相关的循环行为。本构模型基于 Chaboche 的非线性运动硬化规则，其中添加了几个特征，以结合应变率敏感性、循环硬化的应变范围依赖性和弹性模量、静态恢复和平均应力演化。模拟结果与实验结果之间取得了良好的相关性。