Transactions of Materials and Heat Treatment

Title：Formability experiment of aluminum alloy sheet based on variable friction coefficient

Authors： Chen Demao Xia Jiansheng Zhou Xin

Unit： Jiangsu University Yancheng Institute of Technology

KeyWords： AA6111 aluminum alloy variable friction coefficient thickness distribution load formability

ClassificationCode：TG155.5

year,vol(issue):pagenumber：2020,45(6):158-162

Abstract：

The friction coefficients between AA6111 aluminum alloy and H13 die steel under different loads were measured by CFT-I multifunctional material surface comprehensive performance tester under boundary lubrication condition, and the influence laws of load on the formability of materials were studied. Then, the test data were analyzed by software Origin, and the variable friction coefficient model affected by load was established. Next, the finite element analysis and test verification were performed on the model. The results show that when the experimental load increases from 0.204 to 4.028 MPa, the friction coefficient decreases with the increasing of load, and the decreasing trend slows down gradually. Furthermore, the error value of friction coefficients measured by the friction coefficient model based on variable load and the test is small, and it is within the allowable range of error. Therefore, the thickness distribution law of simulation is basically the same as that of test, the maximum thinning of parts occurs at the fillet of punch, and the thicknesses of flange edge and bottom change little to verify the effectiveness of friction model established.

Funds：

国家自然科学基金资助项目 (51505408)

陈德茂（1994-），男，硕士研究生 E-mail：18252038323@163.com 通讯作者：夏建生（1980-），男，博士，副教授 E-mail：Xiajiansheng@163.com

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