摘要
给出正交各向异性有限变形下的统一粘塑性理论中的 Walker模型的本构表达并成功地利用参数控制法(GPM方法 )对其进行数值计算 ,推导出 Walker模型的隐式应力积分过程。在计算的基础上 ,研究了温度、应变率对材料的应力应变关系的影响 ,以及蠕变 ,应力松弛 ,热恢复及循环塑性这些高温下材料的粘塑性力学行为。
The constitutive expression of Walker unified viscoplastic model for orthotropic materials under finite deformation is presented in this paper. Governing parameter method (GPM) is applied successfully to calculate it. The implicit stress integration procedure is presented. By numerical simulation, we studied the influence of temperature and strain rate on the relationship between stress and strain and viscoplastic behavior of materials under high temperature including stress relax, hot recovery and cycling plasticity.
出处
《机械科学与技术》
CSCD
北大核心
2002年第2期276-278,共3页
Mechanical Science and Technology for Aerospace Engineering
