关键词: 橡皮成形；数值模拟；回弹预测；弯边

Abstract:

This paper is focused on the finite element model for rubber forming process. Based on different descriptions of the rubber pad, three kinds of numerical models were put forward for rubber forming and applied in the analysis of straight flanging process. Through the discussion about effect of rubber pad on the sheet deformation, it is concluded that rubber pad plays as a significant part in decreasing springback. Accuracy of the three models was compared, using experimental and predicted springback data of different bending radius. It is found that the method that describes rubber pad as shell elements can bring the springback analysis less errors and higher efficiency. 

Key words: rubber forming, numerical analysis, springback prediction, flanging