摘要
常用各向异性屈服表面由纯现象学的非二次型屈服函数描述，与金属本身的物理性质并无联系。本文根据晶体的各向异性依赖于晶体的方位和变形几何的原理，用ＴＢＨ（Ｔａｙｌｏｒ－Ｂｉｓｈｏｐ－Ｈｉｌ）理论从晶体学角度描述了经历平面变形的不同方位晶粒的屈服表面，并计算了单拉流动应力与塑性应变比Ｒ值在不同拉伸方向的变化情况，为分析和认识材料的各向异性奠定了晶体学分析的基础。
The common anisotropic yield surfaces that are dispirited by non-quadratic yield function of phenomenology,have no relation with the physical properties of metal materialsIn this paper,according to the principle that the anisotropy of crystal depends on the crystal orientation and the geometry of deformation,by using TBH(Taylor-Bishop-Hill)theory,the yield surfaces of crystal at different orientation under plane deformation are dispirited,the variation of yield stress and strain ratio at didderent direction are also calculated;These will lay a crystallographic foundation for analyzing and recognizing the anisotropy of metal materials
出处
《塑性工程学报》
EI
CAS
CSCD
1998年第2期14-19,共6页
Journal of Plasticity Engineering
基金
国家杰出青年科学基金
