Optimization and Identification of the Characteristics of an Hydroformed Structures

Mahfoudh Ayadi (1) , Abel Cherouat (2, 3) , Bouchaib Radi (4) , Elhami Abdelkhalek (5)

1 Mécanique des solides, des structures et Développement Technologique - MSSDT (Tunis, Tunisia)
2 Gamma3 - Automatic mesh generation and advanced methods
3 UTT - Université de Technologie de Troyes
4 Université Hassan 1er [Settat]
5 INSA Rouen Normandie - Institut national des sciences appliquées Rouen Normandie

In this study, we present an experimental/numerical methodology which aims to improve 3D thin sheet hydroforming. The experimental study is dedicated to the identification of stress-strain flow by using the Nelder-Mead simplex algorithm optimization from the global measure of displacement and force. Applications are made to the simulation of thin sheet hydroforming using different die geometry to show the efficiency of the proposed methodology to localize plastic instability, thinning of the blanks and damage initiation under different forming condition.

Keywords: Finite Elastoplasticity; Finite Element Model (FEM); Hydroforming Process; Inverse Identification; Nelder-Mead Simplex

Domains: Engineering Sciences [physics]; Mechanics [physics.med-ph]; Materials and structures in mechanics [physics.class-ph]; Computer Science [cs]; Modeling and Simulation

Mahfoudh Ayadi, Abel Cherouat, Bouchaib Radi, Elhami Abdelkhalek. Optimization and Identification of the Characteristics of an Hydroformed Structures. Applied Mechanics and Materials, 2011, 62, pp.11-20. ⟨10.4028/www.scientific.net/AMM.62.11⟩. ⟨hal-02284814⟩