板材三维曲面翻边的逆成形预示与修边线确定  

3D FLANGING AND BLANK SHAPE PREDICTION FOR SHEET METAL BASED ON ONE-STEP INVERSE FEM

作　　者：张向奎[1] 鲍益东[1] 胡平[2] 胡斯博[1] 郎志奎[1] 王宇[1] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室车身与模具工程研究所,长春130025 [2]大连理工大学汽车工程学院工业装备结构分析国家重点实验室,大连116024

出　　处：《力学学报》2007年第4期486-494,共9页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家杰出青年科学基金(10125208);国家自然科学基金重点项目(19832020);国家汽车电子重大产业化专项基金(2004-2563)资助.~~

摘　　要：基于全量塑性理论和考虑任意形状压料面影响的一步成形有限元逆算法,提出一种板材三维曲面翻边成形和三维修边线的快速模拟方法,能够真实模拟三维翻边过程,进而高精度地确定翻边高度和修边线轮廓形状．收缩和伸长两种典型的翻边成形模拟结果与基于增量塑性理论的有限元正算法比较,表明了该方法的有效性和高效率．In this paper, a fast simulation scheme for 3D curve binder flanging and blank shape prediction for sheet metal based on one-step inverse finite element method is proposed, in which the total deformation plasticity theory and proportional loading assumption are used. The scheme can be actually used to simulate 3D flanging with complex curve binder shape, and suitable for simulating any type of flanging model by numerically determining the flanging height and flanging lines. Two typical 3D curve binder flanging processes including stretch and shrink characters are simulated at the same time by using the present scheme and incremental FE non-inverse algorithm based on incremental plasticity theory, which show the validity and high efficiency of the present scheme.

关 键 词：有限元逆算法 三维曲面翻边 修边线 全量塑性理论 任意形状压料面 

分 类 号：TG386[金属学及工艺—金属压力加工] TG156