Abstract:
A hole-flanging operation on a flat circular sheet with a hole in the center is simulated by an incremental elastoplastic finite-element method, which incorporates strain-hardening and isotropy, with care taken to describe the boundary conditions of penetration, separation and the alternation of the sliding sticking state of friction. The simulation clearly demonstrates the processes of generation of deformation shape until unloading. In the course of analysis, if blank thickness is equal to fractured thickness, it is considered that the forming limit of the flange has been reached. The experimental results were compared with FEM-simulated results. It is found that using the elasto-plastic FEM can effectively predict the generation process of the deformed shape until unloading. The calculated sheet geometries and the relationship between punch load and punch travel are in good agreement with the experimental data.
Author Name (s): Ibrahim Jallouli, Khaled Rouabeh, Slimen Attyaoui
Keywords: Metal forming, Hole-Flanging; Elasto-Plastic, Finite Element Method
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