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Modélisation numérique du flambage des plaques minces et applications au laminage

Published online by Cambridge University Press:  05 August 2009

Sami Abdelkhalek
Affiliation:
École des Mines de Paris-ParisTech-CEMEF (UMR CNRS 7635), BP 207, 1 rue Claude Daunesse, 06904 Sophia-Antipolis-Cedex, France LPMM (UMR CNRS 7554), ISGMP, Université de Paul Verlaine-Metz, Ile de Saulcy, 57045 Metz, France
Hamid Zahrouni
Affiliation:
LPMM (UMR CNRS 7554), ISGMP, Université de Paul Verlaine-Metz, Ile de Saulcy, 57045 Metz, France
Michel Potier-Ferry
Affiliation:
LPMM (UMR CNRS 7554), ISGMP, Université de Paul Verlaine-Metz, Ile de Saulcy, 57045 Metz, France
Pierre Montmitonnet
Affiliation:
École des Mines de Paris-ParisTech-CEMEF (UMR CNRS 7635), BP 207, 1 rue Claude Daunesse, 06904 Sophia-Antipolis-Cedex, France
Nicolas Legrand
Affiliation:
ArcelorMittal Research Maizières, R&D Industrial Operations, BP 30320, Voie Romaine, 57283 Maizières, Les Metz Cedex, France
Pascal Buessler
Affiliation:
ArcelorMittal Research Maizières, R&D Industrial Operations, BP 30320, Voie Romaine, 57283 Maizières, Les Metz Cedex, France
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Abstract

Dans certains procédés de mise en forme, tel que le laminage, l'apparition des contraintes résiduelles est inévitable et peut engendrer le flambage qui se traduit en défauts géométriques. Ceci exige la modélisation de ce phénomène d'instabilité mécanique afin de bien définir la forme et l'amplitude de ces défauts. Cela nécessite un modèle complet ayant des capacités pour le calcul du post-flambage. Dans le présent article, on présente un modèle de flambage possédant la faculté de détecter la charge critique de flambage et la forme post-flambée d'une plaque sous contraintes résiduelles. Des applications à des cas académiques et un cas de laminage seront aussi traités.

Type
Research Article
Copyright
© AFM, EDP Sciences, 2009

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