Simulation numérique du soudage de grandes structures par une approche locale/globale

HAL Id: hal-01508996

https://hal.archives-ouvertes.fr/hal-01508996 Submitted on 15 Apr 2017

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Simulation numérique du soudage de grandes structures

par une approche locale/globale

Yonggang Duan, Frederic Boitout, Jean-Baptiste Leblond, Jean-Michel Bergheau

To cite this version:

Yonggang Duan, Frederic Boitout, Jean-Baptiste Leblond, Jean-Michel Bergheau. Simulation numérique du soudage de grandes structures par une approche locale/globale. 8e Colloque national en calcul des structures, CSMA, May 2007, Giens, France. �hal-01508996�

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RÉSUMÉ. Une approche locale/globale (Souloumiac et al., 2002) a été développée pour déterminer les distorsions résiduelles de soudage des structures de taille importante. Cette méthode consiste à calculer les déformations plastiques sur un modèle local et à les projeter ensuite sur un modèle global. Les distorsions dues au soudage sont alors obtenues par une simple analyse élastique. L’objectif de cet article est d’étudier les conditions à respecter pour définir un modèle local permettant d’obtenir des résultats utilisables pour l’analyse élastique ultérieure sur l’ensemble de la structure. Dans cet article, le principe de l’approche locale/globale est présenté dans un premier temps et les problèmes proposés par cette approche au niveau du modèle local sont ensuite décrits. Enfin, la dernière partie est consacrée à l’étude de la définition du modèle local.

ABSTRACT. A local/global approach (Souloumiac et al., 2002) has been developed to

determine the welding residual distortions of large structures. This method consists in calculating the plastic strains on a local model and projecting them to a global model. The distortions due to welding are obtained through a simple elastic analysis. The objective of this article is to study the conditions which need to be respected in the definition of the local model in order to get results, useful for the subsequent elastic analysis of the whole structure. In this article, the principle of the local/global approach is presented firstly and secondly the problems proposed by this approach are described. Finally, the last part is devoted to the definition of the local model.

MOTS-CLÉS: Soudage, distorsions résiduelles, approche locale/globale. KEYWORDS: Welding, residual distortions, local/global approach.

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