关键词: 板料成形；数值模拟；工艺切口；网格自适应加减密 

Abstract:

An algorithm for open cutting was presented for mesh adaptive technique,and the template library based on mesh adaptive was built.Elements which were passed by trimming line were adjusted by using advancing inciting and adjustment method.The transmission of physical information was completed by a mapping method.This algorithm was integrated into the software FASTAMP which is based on dynamics explicit method.The simulation of a practical automobile body metal sheet was presented,in which the size,position and shape of the open cutting and the distance of the die were optimized when the open cutting was processed.This optimized plan was applied in the production,the precision of the numerical result and the practicability of the algorithm for open cutting were validated by this experimental result.

Key words: sheet metal forming;numerical simulation;open cutting;mesh adaptive