板料成形极限的理论预测与数值模拟研究

本文针对目前板料成形极限的实验、理论计算和数值模拟方法以及成形极限应力图的研究进展 ,进行了综述与分析 ,提出了通过数值模拟方法预测板料成形极限所存在的一些问题。认为找到一种能够尽量减少对外部条件的依赖 ,从而更本质地反映材料性能的方法。

The theoretical prediction and numerical simulation of sheet metal forming limit

This paper overviews the research progress on the experimental, theoretical and numerical simulation methods of sheet metal forming limit and forming limit stress diagram. Some new theoretical prediction methods are introduced, and the application of inverse approach and the ductile fracture criteria are discussed.The existing problems on numerical methods predicting sheet metal forming limit are brought out.It is pointed out that a method that can minimally relies on external conditions and indicates the material ability is expected to be worked out.