BEN AYED, Lanouar; ROBERT, Camille; DELAMÉZIÈRE, Arnaud; NOUARI, Mohammed; BATOZ, Jean-Louis

doi:10.1016/j.engstruct.2014.01.033

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BEN AYED, Lanouar
Laboratoire d'Energétique et Mécanique Théorique et Appliquée [LEMTA ]

ROBERT, Camille
Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]

DELAMÉZIÈRE, Arnaud
Laboratoire d'Energétique et Mécanique Théorique et Appliquée [LEMTA ]

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Ce document a été publié dans

Engineering Structures. 2014-03-15, vol. 62-63, p. 75-86

Elsevier

Résumé en anglais

The current work presents a finite element approach for numerical simulation of the incremental sheet metal forming (ISF) process, called here ''ISF-SAM'' (for ISF-Simplified Analysis Modelling). The main goal of the study is to develop a simplified FE model sufficiently accurate to simulate the ISF process and quite efficient in terms of CPU time. Some assumptions have been adopted regarding the constitutive strains/stresses equations and the tool/sheet contact conditions. A simplified contact procedure was proposed to predict nodes in contact with the tool and to estimate their imposed displacements. A Discrete Kirchhoff Triangle shell element called DKT12, taking into account membrane and bending effects, has been used to mesh the sheet. An elasto-plastic constitutive model with isotropic hardening behaviour and a static scheme have been adopted to solve the nonlinear equilibrium equations. Satisfactory results have been obtained on two applications and a good correlation has been shown compared to experimental and numerical results, and at the same time a reduction of CPU time more than 60% has been observed. The bending phenomenon studied through the second application and the obtained results show the reliability of the DKT12 element.< Réduire

Mots clés en anglais

Incremental sheet forming

Simplified analysis modelling

Shell element DKT12

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Simplified numerical approach for incremental sheet metal forming process

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