广西科技大学学报Issue(3)：18-23,6.DOI:10.16375/j.cnki.cn45-1395/t.2015.03.004
AZ31镁合金单晶初始屈服行为的数值模拟
Numerical simulation of initial yield surface of single crystal AZ31
摘要
Abstract
For investigation of the plastic flow law of single crystal Mg alloy, the constitutive relation of Mg alloy is established with the crystal plasticity theory based on the mechanism of slip and twinning deformation. The numerical simulation for the initial yield surface of single crystal AZ31 are carried out by using the finite element method (FEM). That is, the initial yield surfaces are predicted in offset 2 ×10-4 and 5 ×10-4 under three types of biaxial loading, respectively. By comparing the simulation results with the experimental data, it can be concluded that (1) the initial yield surfaces in offset 2×10-4 and 5×10-4 all present the flat ring, which indicates the anisotropic characteristic of crystal plasticity; (2) in essence, the variation of initial yield surfaces depend on the activity of meso deformation mechanism;(3) the strain hardening of single crystal Mg alloy show the obvious characteristic of kinematic hardening.关键词
AZ31单晶/孪生变形/初始屈服面/平移应变/运动硬化Key words
single crystal AZ31/twinning deformation/initial yield surface/offset strain/kinematic hardening分类
数理科学引用本文复制引用
蓝永庭,李武军,李启袭,张克实..AZ31镁合金单晶初始屈服行为的数值模拟[J].广西科技大学学报,2015,(3):18-23,6.基金项目
国家自然科学基金项目 （）
广西工学院科学研究基金项目（院科自1074023）资助 （）
