基于冲压成形前后网格变化研究汽车碰撞仿真中的冲压效应  

A Study on Stamping Effect of Body Panel for Vehicle Crash Simulation Based on Grid Deformation in Forming Process

作　　者：刘迪辉[1] 李光耀[1] 

机构地区：[1]湖南大学,汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《汽车工程》2008年第12期1061-1064,共4页Automotive Engineering

基　　金：国家杰出青年基金(50625519);长江学者和创新团队发展计划资助

摘　　要：为提高碰撞仿真的精度而研究汽车车身钣件在成形过程中的冲压效应,提出了根据冲压前后网格的变形计算出板料的厚度变化、应变分量和等效应变的设想,并相应地推导出计算公式和开发了一个FORTRAN程序。通过以一拉深零件成形为例与有限元软件LS-DYNA的分析进行对比,两者的结果相当接近。表明该设想是可行的,计算结果文件可直接供碰撞仿真使用。To study the stamping effect of body panel for improving the accuracy of vehicle crash simulation, a scheme is proposed that using grid deformation in forming process to calculate the change of thickness, strain components and equivalent strain. Accordingly the algorithm and related formulae are derived and a corresponding FORTRAN program is developed. The calculated results are compared with that of an analysis using FEA software LS-DYNA for a deep drawing example with a good agreement obtained. This indicates that the scheme is feasible, and the file of calculated results can be used straight in crash simulation.

关 键 词：汽车碰撞仿真 冲压效应 网格变形 应变 厚度 

分 类 号：TG386[金属学及工艺—金属压力加工]