Simulation of texture evolution during plastic deformation of FCC,BCC and HCP structured crystals with crystal plasticity based finite element method  

基于耦合有限元的晶体塑性力学模型的FCC,BCC和HCP晶体织构演化的模拟(英文)

作　　者：黄诗尧[1] 张少睿[1] 李大永[1] 彭颖红[1] 

机构地区：[1]上海交通大学机械与动力工程学院机械系统与振动国家重点实验室,上海200240

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第8期1817-1825,共9页中国有色金属学报（英文版）

基　　金：Projects (50821003,50405014) supported by the National Natural Science Foundation of China;Projects (10QH1401400,10520705000,10JC1407300) supported by Shanghai Committee of Science and Technology,China;Project (NCET-07-0545) supported by Program for New Century Excellent Talents in University,China;Project supported by Ford University Research Program

摘　　要：Two alternative formulations of single crystal plasticity model were introduced respectively and two schemes were implemented in the explicit FE code with software ABAQUS/Explicit by writing the user subroutine VUMAT.Meshes containing material data were created with solid elements.Each element represented an individual grain,and the grain orientations were explicitly stored and updated at each increment.Tangential modulus method was employed to calculate the plastic shear strain increment of deformation systems in combination with a hardening law to describe the hardening responses.Both two developed subroutines were applied to simulate the texture evolution during the uniaxial tension of copper（FCC）,cold rolling of IF steel（BCC） and uniaxial compression of AZ31 magnesium alloy（HCP）.The predicted texture distributions are in qualitative agreement with the experimental results.介绍单晶体模型的2种实现方法,并通过对有限元软件ABAQUS/Explicit的用户材料接口VUMAT做二次开发,实现2种单晶体模型构架和显式有限元方法的耦合。采取实体单元来存储材料信息,每个单元代表一个晶粒,在每个增量步中读取并更新晶粒取向。采用切线系数法来计算每个增量步中不同变形系统的塑性应变增量,通过硬化模型来描述硬化响应。利用编制的2种用户子程序模拟铜(FCC)单向拉伸过程、IF铁(BCC)冷轧过程和AZ31 镁合金(HCP)单向压缩过程中的织构演化,模拟结果和试验结果吻合较好。

关 键 词：single crystal model texture additive decomposition multiplicative decomposition 

分 类 号：TG111[金属学及工艺—物理冶金]