【摘要】 在MSC/MARC有限元分析软件中建立了轴对称精冲有限元模型,利用基于混合位移-压力的更新Lagrange有限元方法对精冲局部剧烈塑性变形进行模拟,克服了剪切自锁和体积自锁,结合网格自适应技术,对剪切区进行网格细化,精确捕捉了应变集中现象．并通过MARC用户子程序实现了Schiffmann损伤功密度的半耦合计算,预测了精冲过程中材料损伤的发展,并预测了不同工艺参数下零件的塌角高度、光亮带高度和精冲力．最后,利用模拟得出的最佳工艺参数获得了合格的零件．更多还原

【Abstract】 By using MSC/MARC software,an axisymmetric FE model is established,and the mixed displacement-pressure updated Lagrange FEM is used to simulate the severe plastic deformation, which could overcome shear locking and volume locking.Together with adaptive remeshing technique, the meshes in shear band are refined automatically,and the strain localization phenomenon could be captured.Schiffmann damage work density model is used to predict the development of damage and fracture in sheet metal.The height of roll-over,height of burnish band and fine-blanking force are predicted,and qualified part was obtained using optimized process parameters from simulation.更多还原