5A02铝合金板料深冲有限元模拟与实验研究

对5A02铝合金板料深冲过程进行了实验研究,并在率相关晶体塑性本构理论框架下,实现了5A02铝合金板料深冲过程的晶体塑性有限元模拟.研究了深冲过程中的制耳和板厚的分布情况,分析预测了极限拉深系数值;结果表明,晶体塑性有限元法模拟的制耳轮廓的高度和极限拉深系数值与实测值比较吻合,板料的厚度变化与实际情况一致.

FE simulation and experimental study of the deep drawing of 5A02 aluminum sheets

The deep drawing of 5A02 aluminum sheets is experimentally investigated, and further in the framework of rate-dependent crystal plasticity theory, the deep drawing process is numerically simulated by the crystal plasticity finite element method(CPFEM). The earing phenomenon and the variation of sheet thickness are studied. And the limit drawing coefficient of 5A02 aluminum sheets is also obtained. The height of the earing profile and the value of the limit drawing coefficient which are obtained from the CPFEM simulations are found in reasonable agreement with the experimental results, and the predictions of thickness variation also accord with the experimental ones.