塑性各向异性屈服准则对铝锂合金贮箱顶盖蠕变时效成形预测精度的影响  

Influence of plastic anisotropic yield criterion on prediction accuracy of creep aging forming of Al-Li alloy tank top cover

作　　者：惠生猛 湛利华 徐永谦[1,2,3] HUI Sheng-meng;ZHAN Li-hua;XU Yong-qian(Light Alloy Research Institute,Central South University,Changsha 410083,China;School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]中南大学轻合金研究院,湖南长沙410083 [2]中南大学机电工程学院,湖南长沙410083 [3]中南大学高性能复杂制造国家重点试验室,湖南长沙410083

出　　处：《塑性工程学报》2021年第12期192-198,共7页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2021YFB3400903);国家自然科学基金资助项目(51905551,52005516);高性能复杂制造国家重点实验室项目(ZZJKT2019-11,ZZJKT2021-03)。

摘　　要：开展了Von Mises、Hill48和Barlat91这3种屈服准则对2195铝锂合金贮箱顶盖蠕变时效成形预测精度的影响研究。回转体顶盖蠕变时效成形后型面呈非对称状态,沿轧制方向的形变略大于垂直轧制方向的形变。通过仿真与试验结果对比发现,与各向同性Von Mises屈服准则相比,采用各向异性屈服准则能更好地预测2195铝锂合金贮箱顶盖蠕变时效成形过程中的非对称变形行为,其中,Barlat91屈服准则的仿真结果与试验结果比较吻合,因此,采用Barlat91塑性各向异性屈服准则能较好地预测2195铝锂合金回转体类零件的蠕变时效成形规律和指导成形模具型面设计。The effects of three yield criteria of Von Mises, Hill48 and Barlat91 on the prediction accuracy of creep aging forming of 2195 Al-Li alloy tank top cover were studied. The profile of revolving body top cover is in an asymmetrical state after creep aging forming, and the deformation along rolling direction is slightly larger than the deformation in direction which is vertical to rolling direction. Through the comparison of simulation and test results, it is found that compared with the isotropic Von Mises yield criterion, using the anisotropic yield criteria can better predict the asymmetric deformation behavior of 2195 Al-Li alloy tank top cover during the creep aging forming process. Among them, The simulation results of Barlat91 yield criterion are in good agreement with the test results. Therefore, using Barlat91 plastic anisotropic yield criterion can better predict the creep aging forming law of 2195 Al-Li alloy revolving parts and guide the design of forming die profile.

关 键 词：2195铝锂合金 有限元仿真 蠕变时效成形 屈服准则 各向异性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]