摘要
在350℃和700℃下SS304不锈钢的非比例多轴循环变形行为进行了系统的实验研究。在此基础上,在统一粘塑性本构理论的框架下改进和发展了一个新的循环本构模型。该模型给出了新的背应力演化方程,引入了非比例度参量,考虑了温度效应和最大塑性应变幅值记忆效应,能够对材料的高温非比例多轴应变循环变形行为和棘轮行为进行统一描述。模型的模拟结果与实验结果比较表明:该模型对SS304不锈钢高温非比例多轴循环变形行为的描述比较合理。
The non-proportionally multiaxial cyclic deformation behavior of SS304 stainless steel were experimentally investigated at 350℃ and 700℃.Based on the experimental results,a new cyclic constitutive model was developed following the unified visco-plastic theory,where a new kinematic hardening relationship was adopted,the non-proportionality,the effect of temperature and memorization for the maximum plastic strain amplitude were also considered.The developed model enables to describe the non-proportionally multiaxial ratcheting and strain-controlled cyclic behavior uniformly.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2006年第4期592-598,697,共7页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(10402037)
西南交通大学博士生创新基金(2003)
关键词
棘轮行为
本构方程
非比例
循环硬化
粘塑性
ratcheting,constitutive model,non-proportionality,cyclic hardening,visco-plasticity.
