计算机仿真中板料冲压成形压边力的优化

Optimization of Binder Force during Computer Simulation of Sheet Metal Forming

通过运用板料拉伸、压缩失稳理论和有限元计算方法 ,提出了新的起皱临界应力计算方法 ,对板料冲压成形中各处的稳定性进行数值化描述 ,从而确定冲压工艺的合理性 ,并优化压边力 ,有效地防止拉裂和起皱的发生 ,解决了工程分析中的一个难题。通过实例的计算对比 。

Based on the plate and shell stable theories and finite element method, a new method to evaluate wrinkling critical stress is provided, so as to describe the stability of each part of the sheet during forming process by numerical methods. It becomes easy to decide the rationality of sheet forming techniques, and to provide the optimum binder force to avoid sheet fracture and wrinkle. The testing results show that the theories and methods are efficient.