接触界面处理, 无网格法, 金属塑性成形, 动力显式, 任意形状模具

Arbitrarily-shaped contact boundary problem is so complicated and challenging, that how to treat it accurately and efficiently is a difficult and central issue.

The authors concentrated on this issue herein. Based on the algorithm used in FEM,

the authors raised a new algorithm for contact detection by deviding the projection area of possible contact surfaces into small rectangles which were called sub-domains. Using penalty function method to calcute the contact force and then introducing its virtual power into the deformation controlling equation to satisfy the constraints on the contact surfaces. The new algorithm is high in efficiency and easy in implement, and is suitable for metal forming simulation with meshless method. Finally, a numerical example was given to illustrate its correctness and efficiency in simulation of metal forming process based on meshless method.

contact boundary treatment; meshless method;  , metal forming;  , dynamic explicit method; arbitrarily-shaped die