摘要
建立了混合硬化正交各向异性材料的屈服准则,进而推导了与之相关的塑性流动法则· 根据简单应力状态的实验曲线,可得到广义等效应力＿应变关系· 初始屈服曲面与材料的弹性常数有关,材料退化为各向同性且只考虑各向同性硬化时,屈服函数退化为Huber＿Mises屈服函数。
A dimensionless stress yield criterion is proposed to describe the mixed hardening of orthotropic material,including kinematic hardening and proportional hardening, and the associated plastic flow law is derived. The generalized effective stress_strain formulae can be obtained correspondingly based on the experimental stress_strain curves in various simple stress states. The initial plastic anisotropy is influenced by the elastic anisotropy. The yield criterion can be reduced to Huber_Mises Criterion for isotropic materials and associated constitutive equations can be degenerated into Prandtl_Reuss equations.
出处
《应用数学和力学》
EI
CSCD
北大核心
2003年第2期192-196,共5页
Applied Mathematics and Mechanics
关键词
正交各向异性材料
混合硬化
弹塑性
本构方程
anisotropy
mixed_hardening
elastoplasticity
yield criterion
constitutive equations
