基于DKT12壳单元的板料冲压成形中重力加载变形模拟仿真  

Simulation of gravity loading deformation in sheet metal stamping based on DKT12 shell element

作　　者：宋云鹤 秦雪娇 鲍益东[1] SONG Yun-he;QIN Xue-jiao;BAO Yi-dong(College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;DYNAFORM Department,Engineering Technology Associates(Shanghai),Inc.Nanjing Branch,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]迪艾工程技术软件(上海)有限公司南京分公司DYNAFORM部门,江苏南京211106

出　　处：《塑性工程学报》2020年第11期65-69,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金面上项目(51875283)。

摘　　要：运用虚功原理将DKT12壳单元应用于板料冲压成形仿真中,建立了高效率的适用于具有明显弯曲效应的重力加载变形的有限元仿真模型,集成了重力加载仿真模型于自主开发的QUICKFORM板料成形有限元求解器。在此基础上模拟了汽车引擎盖外板毛坯的重力加载变形,与实验结果和基于增量法的商业软件DYNAFORM的模拟结果进行比较。模拟了重力加载变形后的拉伸工序,并将成形件厚度与实验结果和DYNAFORM模拟结果进行了比较。研究表明,汽车引擎盖外板重力仿真结果与实验和商业软件模拟结果一致,QUICKFORM求解器准确预示出了成形件危险点位置和危险点厚度,验证了该仿真模型的有效性。DKT12 shell element was applied to sheet metal stamping simulation using virtual work principle. A high efficiency finite element simulation model suitable for gravity loading deformation with obvious bending effect was established. And the gravity loading simulation model was integrated into the self-developed QUICKFORM sheet metal forming finite element solver. On this basis,the gravity loading deformation of the outer panel blank of automobile engine cover was simulated,and it was compared with experimentalal results and the simulation results of commercial software DYNAFORM based on incremental method. The drawing process after gravity loading deformation was simulated,and the thickness of the formed part was compared with experimental results and DYNAFORM simulation results. The results show that the simulation results of gravity loading are consistent with the experimental results and the simulation results of the commercial software,and the QUICKFORM solver accurately predicts the location and thickness of the danger points of the formed parts,which verifies the effectiveness of the simulation model.

关 键 词：DKT12壳单元 板料冲压成形 重力加载变形 有限元 弯曲效应 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]