SS304不锈钢单轴时相关棘轮行为的本构描述

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基金项目:

国家自然科学青年基金(10402037)

西南交通大学校基础研究基金(2005XJB24)资助

Constitutive Modeling for Uniaxial Time-Dependent Ratcheting of SS304 Stainless Steel

Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

摘要: 在SS304不锈钢室温和高温单轴时相关棘轮行为实验研究的基础上,基于Abdel-Karim-Ohno非线性随动硬化律,发展了一个新的统一粘-塑性本构模型。由于该模型考虑了具有应力保持时间和高温下不可忽略的静力恢复或热恢复效应,通过与实验结果的比较发现,新发展的统一粘-塑性本构模型对室温和高温下的时相关棘轮行为均能给予合理的预测结果。
- 棘轮行为 /
- 时相关 /
- 粘-塑性 /
- 本构模型
Abstract: Based on the experimental results of uniaxial time-dependent ratcheting behavior of SS304 stainless steel at room temperature and 973K,a new time-dependent constitutive model was proposed.The model describes the time-dependent ratcheting by adding a static/thermal recovery into the Abdel-Karim-Ohno non-linear kinematic hardening rule.The capability of the model to describe the time-dependent ratcheting was discussed by comparing the simulations with the corresponding experimental results.It is shown that the revised unified viscoplastic model can simulate the time-dependent ratcheting reasonably both at room and high temperatures.
- Ratcheting /
- Time-dependence /
- Visco-plasticity /
- Constitutive model