摘要
利用新的含微孔材料模型对塑性材料局部剪切失稳进行了分析.该含微孔材料模型扩充了孙毅的材料模型,其屈服面由膨胀和运动平移组合而成.对轴对称单向拉伸和平面应变拉伸两种情况的局部剪切失稳分析结果表明,塑性材料局部剪切失稳对含微孔材料的屈服面曲率非常敏感.
By means of a new void-containing material model, analysis of shear localization for plastic materials is carried out. The void-containing material model is based on Sun's material model. Its yield surface consists of a combination of isotropic expansion and kinematic translation. Shear localization conditions for two cases, axisymmetric extension and plane-plane extension, are analyzed by using Sun's isotropic hardening version and the purely kinematic hardening version. The sensitivity of the shear localization to the curvatures of the yield surface in void-containing material is addressed.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2005年第3期381-384,共4页
Journal of Harbin Institute of Technology
关键词
细观力学
剪切失稳
屈服面
Mathematical models
Numerical analysis
Shear stress
Strain
Yield stress
