DP980高强钢U形件板材冲压回弹预测  

Prediction on stamping springback for DP980 high strength steel U-shaped part

作　　者：胡晓[1,2] 王玉升 刘勇 靳阳 王亮赟 余灿生[1] 王飞龙 徐烨[2] 曾宁富 蔺永诚 Hu Xiao;Wang Yusheng;Liu Yong;Jin Yang;Wang Liangyun;Yu Cansheng;Wang Feilong;Xu Ye;Zeng Ningfu;Lin Yongcheng(Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,China;School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Pangang Group Panzhihua Steel and Vanadium Co.,Ltd.,Panzhihua 617000,China)

机构地区：[1]攀钢集团研究院有限公司,四川攀枝花617000 [2]中南大学机电工程学院,湖南长沙410083 [3]攀钢集团攀枝花钢钒有限公司,四川攀枝花617000

出　　处：《锻压技术》2024年第12期73-81,共9页Forging & Stamping Technology

基　　金：四川省攀西试验区重大科技攻关项目(第六批项目)。

摘　　要：U形件板材冲压回弹行为的精准预测是制造业中亟待解决的难题之一。通过单轴拉伸试验与循环加载试验,建立了基于Hill48屈服准则、混合硬化模型和弹性模量衰减模型的DP980高强钢冲压回弹预测模型。采用ABAQUS软件建立U形件板材冲压回弹有限元仿真模型,通过二次开发将建立的混合硬化-弹性模量衰减预测模型嵌入VUMAT、UMAT求解子程序。对比分析各向同性硬化模型、混合硬化模型与提出的预测模型对U形件冲压回弹仿真的预测结果。研究结果表明:基于所建立的混合硬化-弹性模量衰减模型与有限元仿真模型,可以较准确地预测DP980高强钢U形件板材冲压回弹行为,其回弹角度的预测误差仅为0.17%。Accurate prediction on stamping springback behavior of U-shaped part is one of the urgent problems to be solved in the manufacturing industry.Therefore,based on Hill48 yield criterion,hybrid hardening model and elastic modulus attenuation model,the stamping springback prediction model for DP980 high-strength steel was established by uniaxial tensile test and cyclic loading test,and the finite element simulation model for stamping springback of U-shaped part was established by using software ABAQUS.Furthermore,the hybrid hardening-elastic modulus attenuation prediction model was established,which was embedded into VUMAT and UMAT solving subroutines by secondary development,and the prediction results of isotropic hardening model,hybrid hardening model and the prediction model proposed were compared and analyzed in the springback simulation of U-shaped parts.The results show that based on the established hybrid hardening-elastic modulus attenuation model and the finite element simulation model,the stamping springback behavior of DP980 high strength steel U-shaped part can be accurately predicted,and the prediction error of springback angle is only 0.17%.

关 键 词：冲压回弹 屈服准则 DP980高强钢 混合硬化-弹性模量衰减模型 VUMAT UMAT 

分 类 号：TG430[金属学及工艺—焊接]