Bending and Twisting Springback Prediction in the Punching of the Core for a Lattice Truss Sandwich Structure
来源期刊：Acta Metallurgica Sinica2013年第3期
论文作者：Wenchun JIANG Bin YANG Xuewei GUAN Yun LUO
文章页码：241 - 246
摘 要：The finite element method was used to study the springback induced by the punching of the core. In order to simulate the springback accurately, a mixed isotropic-nonlinear kinematic hardening model is used to define the material mechanical behavior during plastic deformation. The effects of the friction coefficient, the plate thickness and the die radius have been investigated. The results show that the springback of the sheet with diamond hole is different from the homogenous sheet. Not only bending springback, but also a twisting springback along the truss is generated because of the non-uniform distribution of the bending stress along the truss length. The plate thickness should be around 1.3 mm with larger friction coefficient and smaller die radius, which is useful to decrease the bending and twisting springback.
Wenchun JIANG，Bin YANG，Xuewei GUAN，Yun LUO
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China)
摘 要：The finite element method was used to study the springback induced by the punching of the core. In order to simulate the springback accurately, a mixed isotropic-nonlinear kinematic hardening model is used to define the material mechanical behavior during plastic deformation. The effects of the friction coefficient, the plate thickness and the die radius have been investigated. The results show that the springback of the sheet with diamond hole is different from the homogenous sheet. Not only bending springback, but also a twisting springback along the truss is generated because of the non-uniform distribution of the bending stress along the truss length. The plate thickness should be around 1.3 mm with larger friction coefficient and smaller die radius, which is useful to decrease the bending and twisting springback.
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