Prediction of forming limit curve of aluminum alloy sheet based on maximum strain-rate necking criterion

被引：0
|
作者：
Jia Y.-J. [1 ]
Zhu C. [1 ]
Li S.-Y. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Central South University, Changsha
[2] Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Finite element simulation; Forming limit curve; Instability criterion; Necking;
D O I：
10.19476/j.ysxb.1004.0609.2019.06.02
中图分类号：
学科分类号：
摘要：
In this work, an instability criterion (maximum strain-rate instability criterion) was proposed to predict forming limit curve (FLC) of sheet metal based on finite element simulation. The criterion analyzed the entire deformation history of all elements in the specimen. The necking time and necking position were identified by tracking the temporal change of thickness strain and thickness strain-rate. The criterion could be applied to deformation processes with possible strain path changes. Application to the AA3003 aluminum sheet shows that the FLC predicted by the present method is in overall good agreement with the experimental results, and it is better than that predicted by the traditional M-K theory. © 2019, Science Press. All right reserved.
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页码：1143 / 1149
页数：6
相关论文
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