考虑各向异性的铝合金型材辊弯断裂预测  

Prediction of fracture of aluminum alloy profiles in roll bending considering anisotropy

作　　者：刘纯国[1,2] 李紫桐 张学广 李明 LIU Chun-guo;LI Zi-tong;ZHANG Xue-guang;LI Ming(Roll-forging Research Institute,Jilin University,Changchun 130022,China;School of Materials Science and Engineering,Jilin University,Changchun 130022,China;Engineering Planning and Development Department,CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130051,China)

机构地区：[1]吉林大学辊锻工艺研究所,长春130022 [2]吉林大学材料科学与工程学院,长春130022 [3]中车长春轨道客车股份有限公司工程规划发展部,长春130051

出　　处：《吉林大学学报（工学版）》2023年第12期3388-3396,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51575231)。

摘　　要：以6005A铝合金型材为例,提出了一种考虑各向异性的铝合金型材辊弯断裂预测方法,分别采用von Mises、Hill48和Yld2004-18p屈服准则描述铝合金的各向异性,通过实验和晶体有限元模拟确定了模型参数。模拟结果与辊弯实验结果对比表明:采用Mises屈服准则的预测误差大于15%;采用Hill48屈服准则的预测误差小于5%;采用Yld2004-18p屈服准则的预测误差小于3%。说明使用各向异性屈服准则与连续损伤准则耦合的有限元模型,比各向同性模型能更准确地预测铝合金型材辊弯成形中的断裂行为。An anisotropic roll bending fracture prediction method was proposed for 6005A aluminum alloy profile.Von Mises,Hill48 and Yld2004-18p yield criteria were used to describe the anisotropy of aluminum alloy respectively.Model parameters were determined by experiments and crystal finite element simulation.The results of simulation and roll bending test show that the predicted error of Mises yield criterion is more than 15%,Hill48 yield criterion is less than 5%and Yld2004-18p yield criterion is less than 3%.It shows that the finite element model coupled with the anisotropic yield criterion and the continuous damage criterion can predict the fracture behavior of aluminum alloy profiles in roll bending more accurately than the isotropic model.

关 键 词：材料合成与加工工艺 型材辊弯 各向异性 断裂准则 晶体塑性 

分 类 号：TG386[金属学及工艺—金属压力加工]