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Articles

Defining and identifying a loading basis for the full-field reconstruction of plate structures under tension loads

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Pages 270-279 | Published online: 05 Oct 2012
 

Abstract

This method defines a loading basis for plate structures which is identified from strain measurements in order to reconstruct the mechanical fields. This loading basis is given by the decomposition of a global structure into simple substructures associated with the loaded boundaries only. Some elementary bases are defined for each substructure depending on its local edge effect. A global basis is then obtained by the equilibrium of the complete structure. The main advantage of this approach is to classify the basis vectors depending on their influence on the overall response of the structure.

Nous proposons la construction d’une base de chargement pour des structures plaques afin de reconstruire les champs mécaniques à partir de mesures de déformation. Cette base de chargement est obtenue par une décomposition de la structure complexe en sous-structures simples associées aux seuls bords chargés. Une méthode de type Trefftz définit des bases de chargement élémentaires en fonction de la localisation des effets de bords induits. La base de chargement globale est ensuite donnée par l’équilibre de la structure complète. L’intérêt est de définir une base de chargement en fonction de son influence sur la réponse globale de la structure.

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