各向异性铝合金板材本构关系及其有限元模拟  

Finite Element Simulation for the Punch and Stress-Strain Relationship of Anisotropic Aluminum Alloy Sheets

作　　者：张秀娟[1] 刘彦奎[1] 魏延刚[1] 运新兵[1] 韩锋[2] 郑勇福[2] 

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028 [2]长春轨道客车股份有限公司,吉林长春130062

出　　处：《大连交通大学学报》2008年第6期44-47,共4页Journal of Dalian Jiaotong University

摘　　要：为了减轻自身重量,采用铝合金板材和冲压成形工艺制造高速列车车体已经成为现代化铁路车辆的发展方向.但是,铝合金板材的力学性能是各向异性的,其冲压成形过程复杂,变形规律不易把握.采用Barlat三参数屈服准则获得了各向异性铝合金板材的应力应变关系曲线,并通过有限元模拟和拉伸实验进行了对比验证,结果表明采用Barlat三参数屈服准则获得的各向异性铝合金板材的应力应变关系曲线可应用于各向异性铝合金板材的有限元分析,并初步对各向异性铝合金板材的冲压成形过程进行了非线性接触有限元模拟,获得了比较理想的有限元分析结果,这对改进高速列车车体加工工艺、缩短冲压模具调试周期、降低生产成本具有积极的意义.In order to reduce weight, adopting aluminum alloy sheets and the process of punch forming to fabricate the carbody of high-speed trains are becoming a development trend of modem trains and vehicles. However the process of punch forming is very complicate, and the de- formation principal is not easy to be grasped, since the mechanical properties of aluminum alloy sheets are anisotropic. In this paper, Barlat ＂s three-parameter criterion is used to calculate stress-strain relationship of anisotropic aluminum alloy sheets. Based on the stress-strain rela- tionship, finite element analysis software is used to perform non-linear contact finite element simulation for the punch and formation process of the anisotropic aluminum alloy sheets with the ideal computation results. The simulation is beneficial to improve technical process of the highspeed train carbody, reduce the die adjustment period and decrease the fabrication cost.

关 键 词：各向异性 应力应变关系 非线性接触有限元模拟 板材冲压成形 

分 类 号：TG386.41[金属学及工艺—金属压力加工]