Abstract
Abstract In this paper, a multi-deformable bodies solution method which includes both sheet metal elastoplastic deformation and bulk deformation of pressure-transmitting medium (PTM) in sheet metal flexible-die forming was proposed. The elastoplastic deformation of sheet metal was analyzed with finite element method (FEM), and the bulk deformation of PTM was analyzed with a meshless method, called element-free Galerkin method (EFGM). Aiming at the coupled deformation characteristics and strong nonlinear features between sheet metal/FEM and PTM/EFGM, a node-to-point contact method based on slave-master concept was employed to treat the frictional contact between these two deformable bodies. A numerical example of sheet metal flexible-die forming was presented to demonstrate the effectiveness of the proposed method.
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