6061铝合金, 挤压, 成形缺陷, 数值模拟

In order to forecast the defects of the cup part formed by the 6061 aluminum alloy,3D and 2D elastoplasticity FEM models were established with software of Deform-3D and MSC.Superform respectively. The reason for such defects was analyzed and the methods for improving simulation accuracy were proposed. Meanwhile, the corresponding experimental researches were conducted. The results show that the forming defects like underfilling, overlap and crack occur at each cup part of aluminum alloy. For this axisymmetric problem, the calculated results of 2D FEM model are proved superior to those of 3D model. Good agreement is found between the numerical results and experimental work.