Title: Application of response surface method for FEM bending analysis

Authors: Ridha Hambli, Ali Mkaddem, Alain Potiron

Addresses: LASQUO – ISTIA, 62, Avenue Notre Dame du Lac, Angers 49000, France. ' ENSAM/CER-ANGERS-LPMI-ERT, 2 Boulevard du Ronceray-BP3525, Angers 49035, France. ' ENSAM/CER-ANGERS-LPMI-ERT, 2 Boulevard du Ronceray-BP3525, Angers 49035, France

Abstract: The bending of metal parts is subjected to a variety of process parameters. In this paper, a numerical investigation into the bending process was carried out. The aim was to study the effects of the interaction between the clearance and the die corner radius on the evolution of the bending force, the maximum damage within the part, the springback and the Mises stress. Designed experiments are an efficient and cost-effective way to model and analyse the relationships that describe process variations. The numerical simulation of the damage evolution has been modelled by means of continuum damage approach. The Lemaitre damage model, taking into account the influence of triaxiality, has been implemented into ABAQUS/Standard code, in order to predict the risk to external fibres during the process and the changes in material characteristics after bending. The results of the proposed investigation show the strong dependence between the inputs and the responses.

Keywords: bending force; springback; FEM; response surface methodology; finite element method; Mises stress; damage evolution; sheet metal bending.

DOI: 10.1504/IJVD.2005.007214

International Journal of Vehicle Design, 2005 Vol.39 No.1/2, pp.1 - 13

Published online: 23 Jun 2005 *

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