锻压技术

基于M-K理论的5A06铝合金板材温成形极限预测

英文标题：Prediction on warm forming limit for 5A06 aluminum alloy sheet based on M-K theory

分类号：TG386.V26

出版年,卷(期):页码：2023,48(12):94-99

摘要：

5A06铝合金的室温成形能力有限，冲压成形易发生破裂，为此对5A06铝合金板材的温成形进行研究，并基于M-K凹槽理论对5A06铝合金板材的成形性能进行预测。首先，采用理论计算和试验相结合的方式，建立了200~300 ℃、0.01~1 s-1条件下5A06铝合金的本构模型；然后，将Swift材料强化模型导入成形极限的推导中，并采用Newton-Raphson迭代法求解得到M-K凹槽理论预测的成形极限图和初始厚度不均匀度f0；最后，对5A06铝合金板材进行Nakajima试验，验证理论预测结果的准确性。结果表明，M-K理论能够有效预测5A06铝合金在实验温度范围内的成形性能。

The room temperature forming ability of 5A06 aluminum alloy is limited, and it is prone to cracking in stamping, for this problem,the warm forming of 5A06 aluminum alloy sheet was researched, and based on the M-K groove theory, the formability of 5A06 aluminum alloy sheet was predicted. Firstly, a constitutive model of 5A06 aluminum alloy under the conditions of 200-300 ℃ and 0.01-1 s-1 was established by combining theoretical calculation and experiment. Then, the Swift material strengthening model was introduced into the derivation of forming limit, the forming limit diagram and the initial thickness unevenness predicted by the M-K groove theory were obtained by the Newton-Raphson iteration method. Finally, the Nakajima test was conducted on the 5A06 aluminum alloy sheet to verify the accuracy of theoretical prediction results. The results show that the M-K groove theory can effectively predict the formability of 5A06 aluminum alloy within the experimental temperature range.

基金项目：

国家自然科学基金联合基金资助项目（U1564202)

作者简介：李升（1989-），男，博士，高级工程师 E-mail：lishengsir@163.com 通信作者：黄晓敏（1986-），女，博士研究生，工程师 E-mail：B20200250@xs.ustb.edu.cn.

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