航空学报 > 2005, Vol. 26 Issue (1): 58-61

描述1Cr18Ni9Ti不锈钢单轴棘轮行为的黏塑性本构模型

刘宇杰, 蔡力勋, 杨显杰, 牛清勇   

  1. 西南交通大学 应用力学与工程系, 四川 成都 610031
  • 收稿日期:2003-12-19 修回日期:2004-04-27 出版日期:2005-02-25 发布日期:2005-02-25

Visco-Plastic Constitutive Model for Uniaxial Ratcheting Behavior of 1Cr18Ni9Ti Stainless Steel

LIU Yu-jie, CAI Li-xun, YANG Xian-jie, NIU Qing-yong   

  1. Depatmant of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2003-12-19 Revised:2004-04-27 Online:2005-02-25 Published:2005-02-25

摘要: 在室温下对1Cr18Ni9Ti不锈钢进行了单轴棘轮实验研究,提出了一种新的分离型黏塑性本构模型。引入了能记忆最大塑性应变的记忆面,在记忆面内和面上采用不同形式的塑性应变流动律和背应力演化律,将单调拉伸和循环行为分别独立描述。将模型应用于1Cr18Ni9Ti不锈钢单轴棘轮行为的描述中,模拟结果和实验结果吻合较好。

关键词: 不锈钢, 棘轮, 本构模型, 黏塑性, 随动硬化

Abstract: The uniaxial ratcheting behavior of 1Cr18Ni9Ti stainless steel at room temperature is experimentally investigated. A new separate visco-plastic constitutive model is presented. A memory surface for maximum plastic strain is introduced and different plastic strain flow rules and evolution rules of back stress are applied according to the memory surface. The monotonic tensile behavior and cyclic behavior of the material are separately described independently. The model is applied to simulation for uniaxial ratcheting behavior of 1Cr18Ni9Ti stainless steel. It is shown that the simulative results agree well with the experimental ones.

Key words: stainless steel, ratcheting, constitutive model, visco-plasticity, kinematic hardening

中图分类号: