Formulation ALE et remaillage adaptatif: application à la modélisation du fluotournage

HAL Id: hal-01495602

https://hal.archives-ouvertes.fr/hal-01495602 Submitted on 25 Mar 2017

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Formulation ALE et remaillage adaptatif: application à

la modélisation du fluotournage

Marie Houillon, Roland E. Logé, Eric Ramel, Elisabeth Massoni

To cite this version:

Marie Houillon, Roland E. Logé, Eric Ramel, Elisabeth Massoni. Formulation ALE et remaillage adaptatif: application à la modélisation du fluotournage. 8e Colloque national en calcul des structures, CSMA, May 2007, Giens, France. �hal-01495602�

 

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CEMEF, Ecole Nationale Supérieure des Mines de Paris 2 Rue Claude Daunesse

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RESUME: Un modèle éléments finis de calcul thermomécanique 3D doté d’une formulation

ALE est implémenté dans le logiciel Forge2005® afin de simuler le procédé de fluotournage. On s’attache, dans cette étude, à optimiser le maillage par une méthode adaptative utilisant l’estimateur d’erreur de Zienkiewicz-Zhu. L’utilisation de la méthode ALE s’adapte tout à fait au caractère incrémental du procédé et permet de prendre en charge les difficultés liées au contact pièce/outil. Associée à des cinématiques d’outil complexes, cette formulation permet d’obtenir des résultats réalistes et encourageants en ce qui concerne les temps de calcul.

ABSTRACT: A finite element model allowing thermo-mechanical calculation using an ALE

formulation is implemented in Forge2005® to simulate flow forming process. The aim of this work is to optimize meshing with an adaptive method using Zienkiewicz-Zhu error estimation. The ALE method is well adapted to incremental forming processes such as flow forming and allows dealing with difficulties generated by the contact between work piece and tools. Coupled with complex tool kinematics, this formulation gives realistic and promising results with regard to computation time.

MOTS-CLES: fluotournage, éléments finis, ALE, estimation d’erreur, adaptivité

KEYWORDS: flow forming, finite element method, ALE, error estimate, adaptivity



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