Comparative study on forming limit prediction of AA7075-T6 sheet with M−K model and Lou−Huh criterion

被引：14

作者：

DONG G.-J. ^{[1
]}

CHEN Z.-W. ^{[2
]}

YANG Z.-Y. ^{[2
]}

FAN B.-C. ^{[1
]}

机构：

[1] Hebei Key Laboratory of Special Delivery Equipment, Yanshan University, Qinhuangdao

[2] Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education of China, Yanshan University, Qinhuangdao

来源：

Transactions of Nonferrous Metals Society of China (English Edition) | 2020年 / 30卷 / 06期

基金：

中国国家自然科学基金;

关键词：

AA7075-T6; sheet; ductile fracture criterion; forming limit diagram; M−K model;

D O I：

10.1016/S1003-6326(20)65311-0

中图分类号：

学科分类号：

摘要：

In order to effectively predict the fracture of AA7075-T6 sheet, the forming limit curves of AA7075-T6 high-strength sheet were drawn according to Morciniak−Kuczyski (M−K) model and Lou−Huh criterion, respectively. The errors between the predicted values of the two theoretical prediction models and experimental values were calculated by error analysis. The forming limit curves were verified by the punch−stretch test to evaluate the prediction accuracy of M−K model and Lou−Huh criterion. The error analysis results show that the mean error of Lou−Huh criterion with the optimal parameters for all tensile specimens is 25.04%, while the mean error of M−K model for all tensile specimens is 74.24%. The prediction accuracy of Lou−Huh criterion in predicting the fracture of AA7075-T6 sheet is higher. The punch−stretch test results show that the forming limit curve drawn by Lou−Huh criterion can effectively predict the fracture of AA7075-T6 sheet, but the prediction accuracy of M−K model is relatively poor. © 2020 The Nonferrous Metals Society of China

引用

页码：1463 / 1477

页数：14

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