个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:机械工程学院
学科:车辆工程
办公地点:汽车基础实验教学中心A305
联系方式:13591183897
电子邮箱:yingliang@dlut.edu.cn
Crystal Plasticity Finite Element Model Based on Dislocation Density Evolution Coupling with Thermal Activation and Damage Mechanism
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论文类型:会议论文
发表时间:2017-01-01
收录刊物:CPCI-S
页面范围:219-224
关键字:Crystal plasticity; Hot forming; 22MnB5; Dislocation density; Damage; Thermal activation
摘要:Here in this paper, a multiscale framework based on crystal plasticity is proposed coupling with thermal activation mechanism, as well as the continuum damage mechanism. The microscopic hardening phenomenon is revealed by a dislocation density evolution model, which is constructed according to the temperature. The physical-based exponential function of shear strain rate is posed to describe the thermal material behavior replacing the general phenomenological power-law equation. A 3D spatial distribution of stress, strain and damage is presented in the finite element method, parameters of which are previously determined by a RVE calculation and fitting test compared to the experimental data. Finally, some discussions of stress heterogeneity and texture evolution are proposed and conclusions are made.