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Strain localization and damage prediction during sheet metal forming

Article dans une revue avec comité de lecture
Auteur
HADDAG, Badis
1104 Laboratoire de physique et mécanique des matériaux [LPMM]
ccABED-MERAIM, Farid
1104 Laboratoire de physique et mécanique des matériaux [LPMM]
ccBALAN, Tudor
1104 Laboratoire de physique et mécanique des matériaux [LPMM]

URI
http://hdl.handle.net/10985/10187
DOI
10.1007/s12289-008-0362-z
Date
2008
Journal
International Journal of Material Forming

Résumé

This work aims to study the strain localization in different sheet metal forming processesby the finite element method using advanced behaviour models. In order to improve the prediction of the formability limit of sheets under forming it is important to consider constitutive models that take into account the degradation of material properties due to large strain localization. For this purpose, an elastic-plastic model has been coupled with the classical damage model of Lemaitre and Chaboche [2,3]. Two hardening models are considered in an attempt to more accurately reproduce the work-hardening phenomenon at large strains. The first one represents the classical cyclic hardening model of Chaboche-Marquis [3,4] while the second corresponds to the so-called dislocation-based microstructural model of Teodosiu and Hu [5,6]. These two models are able to reproduce some transient hardening phenomena at strain path changes - with a better description obtained with the microstructural model. The coupling with damage is carried out within the framework of continuum damage mechanics thanks to the introduction of a scalar variable describing the degradation of the elastic proprieties and consequently softening behaviour when damage occurs. The coupled elastic-plastic damage model is implemented into the Abaqus software using an implicit integration scheme. The resulting code is used for the prediction of forming limit diagrams.

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LPMM_IJMF_2008_ABED_MERAIM.pdf
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  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)

Documents liés

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  • Prédiction de courbes limites de formage avec un modèle élasto–plastique–endommagement et un critère de localisation 
    Communication avec acte
    HADDAG, Badis; ccABED-MERAIM, Farid; ccBALAN, Tudor (Groupe Français de Mécanique des Matériaux, 2008)
    La mise en forme de tôles métalliques implique bien souvent de grandes déformations accompagnées de trajets de chargement complexes. Pour améliorer la prédiction via la simulation numérique de la forme finale des pièces, ...
  • Prediction of strain localization in sheet metal forming using elastoplastic-damage model and localization criterion 
    Communication sans acte
    HADDAG, Badis; ccABED-MERAIM, Farid; ccBALAN, Tudor (2007)
    The aim of this work is to study the strain localization during the plastic deformation of sheets metals. This phenomenon is precursor for the fracture of drawing parts, thus its prediction using advanced behavior models ...
  • Strain localization analysis using a large deformation anisotropic elastic-plastic model coupled with damage 
    Article dans une revue avec comité de lecture
    HADDAG, Badis; ccABED-MERAIM, Farid; ccBALAN, Tudor (Elsevier, 2008)
    Sheet metal forming processes generally involve large deformations together with complex loading sequences. In order to improve numerical simulation predictions of sheet parts forming, physically-based constitutive models ...
  • Investigation of advanced strain-path dependent material models for sheet metal forming simulations 
    Article dans une revue avec comité de lecture
    HADDAG, Badis; ccBALAN, Tudor; ccABED-MERAIM, Farid (Elsevier, 2006)
    Sheet metal forming processes often involve complex loading sequences. To improve the prediction of some undesirable phenomena, such as springback, physical behavior models should be considered. This paper investigates ...
  • Strain localization analysis using a large deformation anisotropic elastic-plastic model coupled with damage 
    Article dans une revue avec comité de lecture
    HADDAG, Badis; ccABED-MERAIM, Farid; ccBALAN, Tudor (Elsevier, 2009)
    Sheet metal forming processes generally involve large deformations together with complex loading sequences. In order to improve numerical simulation predictions of sheet part forming, physically-based constitutive models ...

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