When plastic FEM is used to numerically simulate the process of sheet metal forming, handling of dynamic contact interface conditions between the workpiece and its dies is needed to obtain credible computational results.

• 采用塑性有限元法对金属板料成形过程进行数值模拟时，为获得可信的计算结果，需要对工件与模具间动态接触边界条件进行处理。