摘要
通过单向拉伸试验和半球形刚模胀形试验分别得到了6016铝合金板材的室温应力应变曲线和成形极限图(FLD),拟合应力应变曲线获得了Hollomon,Power和Voce本构方程.应用DYNAFORM软件进行了刚模胀形试验的有限元模拟,分析了三种本构方程对6016铝合金成形极限的影响.模拟结果和试验结果对比表明:本构方程的选择对铝合金板材成形极限有显著的影响,相比Power与Hollomon,采用Voce本构方程进行模拟能够更精确地预测铝合金板材的成形极限.
The stress-strain curves and forming limit diagrams (FLD) of 6016 aluminum alloy sheets were obtained through uniaxial tensile test and Nakazima test. The curves were fitted based on Hollomon, Power and Voce constitutive equations. The simulation of the Nakazima test were performed by using DYNAFORM finite element software with three kinds of constitutive equations. The simulated forming limit is compared with the experiment results. The results show that the selection of constitutive equation has a significant influence on the results of forming limit of the aluminum alloy sheet. Compared with Power and Hollomon, the Voce constitutive equation can predict the forming limit of aluminum alloy more accurately.
作者
付健
郭丽丽
FU Jian;GUO Lili(School of Materials Science and Engineering, Engineering Research Center of Continuous Extrusion, Dalian Jiaotong University, Dalian 116028,China)
出处
《大连交通大学学报》
CAS
2019年第3期97-101,共5页
Journal of Dalian Jiaotong University
基金
国家自然科学基金资助项目(51401043)
