金属板条在圆柱形模中弯曲成形的大变形有限元分析  

Large deformation finite element analysis of cylindrically bending of metal strips

作　　者：朱有利[1] 王先进[1] 康永林[1] 董德元[1] 

机构地区：[1]北京科技大学金属压力加工系,北京100083

出　　处：《计算结构力学及其应用》1996年第2期241-247,共7页

摘　　要：本文采用大变形弹塑性有限元法对金属板条在柱形模中的压弯成形过程进行了数值模拟,并与实验进行了比较。首先给出了纠正的拉格朗日有限元公式和基于弹塑性乘法分解的超弹性塑性本构关系。对接触摩擦问题的处理采用了罚函数法。通过对数值结果的分析得出了一些对弯曲工艺的设计有指导价值的结论。Numerical simulations of cylindrically bending of metal strips are performed using large deformation elasto-plastic finite element method. The results are compared with those from experiments. Updated Lagrangian formulations and hyperelastic-plastic constitutive relations based on elasto-plastic multiplictive decomposition of the deformation gradient tensor are given first of all. Penalty method is used in dealing with contact and frictions. Analyses of the numerical results draw some conclusions which are valuble to engineering design of strip bending formations.

关 键 词：有限元 大变形 板材弯曲 

分 类 号：TG302[金属学及工艺—金属压力加工]