用大变形壳元数值模拟薄钣的深冲成形

基金项目:

国家教委留学回国人员科研基金资助项目

详细信息

Numerical Simulation of Sheet Metal Forming by Using Large Deformation Shell Elements

School of Architectulal Engineering, Beijing Polytecdric University, Beijing, 100022

摘要: 开发了大变形弹塑性壳单元有限元程序.为了改进增量计算的收敛性,程序中采用C¹连续的几何非线性——材料非线性三角形浅壳单元.为了有效计算广泛存在于薄板成形过程中的接触问题,提出了混合半道解法有限元解法计算接触问题.并给出了若干计算结果,验证了计算方法的有效性.
- 深冲成形 /
- 接触 /
- 弹塑性变形
Abstract: The large deformation elashc-plastic shell finite element code is developed. In order to improve the convergence of incremental calculations, the C¹-conhninty geometric nonlinear-material nonlinear triangle shallow shell finite elements are applied in the code. Also, a mixed send-inverse finite element contact algorithm is created for effective calculations of contact problems widely existing in sheet metal forming processes. To verify the computational code based on present shell element and contact algorithm, some numerical results are worked out. These results are compared with other numerical or analytical solutions, which turns out to be good in agreement.
- deep drawing forming processes /
- contact /
- elastic-plastic deformation