汽车用5182铝合金板温冲压实验研究及数值模拟

陈婕尔¹，王孟君^{1, 2}，杨 刚¹，周 威¹，李光耀²

(1. 中南大学 有色金属材料科学与工程教育部重点实验室，长沙 410083；
2. 湖南大学 汽车车身先进设计制造国家重点实验室，长沙，410082)

摘 要：以5182铝合金板本构方程为基础，采用ABAQUS有限元模拟软件对5182铝合金板温冲压过程进行数值模拟，研究冲压温度和冲压速度等工艺因素对板材成形性能的影响；通过温冲压实验探讨5182铝合金板在不同冲压温度、冲压速度下的极限拉深比(LDR)。实验及模拟结果表明：冲压速度为0.1 mm/s时，合金的LDR值并非随着温度的升高而单调增加；冲压温度为523 K时，随着冲压速度的增加，LDR值逐渐降低；5182铝合金板的冲压性能主要受变形过程中板材的温度梯度与应变速率的影响；模拟结果与实验结果具有良好的一致性。

关键词：5182铝合金；温冲压；极限拉伸化；数值模拟

Experimental study and numerical simulation of warm stamping of 5182 aluminum alloy for automotive body

CHEN Jie-er¹, WANG Meng-jun^{1, 2}, YANG Gang¹, ZHOU Wei¹, LI Guang-yao²

(1. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education,
Central South University, Changsha 410083, China;
2. State Key Laboratory of Advanced D)

Abstract:Based on the constitutive equation of 5182 aluminum alloy, the influence of process parameters, such as drawing temperature and stamping speed, was investigated by ABAQUS soft during the numerical simulation. By warm stamping experiment，the limiting drawing ratio (LDR) value of 5182 aluminum alloy sheet at different stamping temperatures and stamping speeds was obtained. The experimental and simulation results show that the LDR value of 5182 aluminum alloy does not increase with the raise of forming temperature monotonously when the drawing speed is 0.1 mm/s. LDR value decreases with the increase of stamping speed ,when the forming temperature is 523 K. The drawing property of 5182 aluminum alloy is mainly affected by the temperature gradient and strain rate in the deformation process. The simulation results fit well with the experimental ones.

Key words:5182 aluminum alloy; warm stamping; limiting drawing ratio; numerical simulation