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Numerical simulation on surface deflection of cylindrical shallow shells

By: Shenggui Chen; Zhenzhong Sun;

2010 / IEEE / 978-1-4244-7739-5

Description

This item was taken from the IEEE Conference ' Numerical simulation on surface deflection of cylindrical shallow shells ' The finite element models of cylindrical shallow shells that could represent automobile panels were established. Simulations of forming and spring back of the cylindrical shallow shells were carried out. From the characteristics of stress distribution and deformation, it is indicated that sheet metal can entirely flat punch over stamping and the surface deflection does not exist after forming. Surface deflection appears after unloading, and exhibits M mode along cylindrical direction. Great residual stress exists along the cylindrical direction of shell, and the surface deflection increases with the increasing of residual compression stress. The residual stress is a necessary condition of the generation of the surface deflection.