High strain rate deformation behaviors experimental study and numerical simulation of rolled AZ31 magnesium alloy loaded along different directions

被引：0
|
作者：
Chen Y. [1 ]
Mao P.-L. [1 ]
Wang Z. [1 ]
Liu Z. [1 ]
Wang R.-F. [1 ]
机构：
[1] School of Materials Science and Technology, Shenyang University of Technology, Shenyang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 05期
基金：
中国国家自然科学基金;
关键词：
AZ31 magnesium alloy; High strain rate deformation; Isotropic behavior; Johnson-Cook constitutive equation; Numerical simulation;
D O I：
10.11817/j.ysxb.1004.0609.2020-37526
中图分类号：
学科分类号：
摘要：
In order to investigate the isotropic behavior of rolled AZ31 magnesium alloy sheet under high strain rate deformation, the Split Hopkinson Pressure Bar (SHPB) experiments were carried out along normal direction(ND), 45°and rolling direction(RD) at an average strain rate of 700 s-1, 1000 s-1, 1300 s-1 and 1600 s-1, respectively. Based on the experiment results of SHPB, Johnson-Cook constitutive equations of different deformation directions were established. The numerical simulation of SHPB was carried out by jointly using of preprocessing software Hypermesh and explicit dynamics simulation software LS-DYNA. Both experimental and simulation results showed that the rolled AZ31 magnesium alloy along RD has higher deformation ability and the yield stage in true stress-strain curves is more obvious than the other two directions. While ND shows obvious positive strain rate hardening effect and strain rate sensitivity. True strain-time curves and true stress-strain curves obtained by post-processing of numerical simulation are well agreement with the SHPB experimental results. Johnson-Cook constitutive equation parameters of rolled AZ31 magnesium alloy along different loading directions have high precision. © 2020, Science Press. All right reserved.
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页码：997 / 1009
页数：12
相关论文
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