网格自适应技术在冲压成型过程数值模拟中的应用

he finite element simulation is now widely used in the design of metal forming process. In this paper, a finite element model is developed to analyze the forming process of stainless steel by the FE software, MSC.Marc. The adaptive mesh technique is applied in the three-dimension simulation of the sheet forming process. The penalty method is employed to accomplish the convergence of the contact condition. Friction and thickness conditions of workpiece are analyzed. The results of the numerical simulation are compared to the sample from the production process. The comparisons show good agreement in both the thickness and the flange shape. Compared with different model, the one based on the adaptive mesh technique shows better agreement. Reliability of the model is evaluated.