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Original Articles

Level-Sets and Arlequin framework for dynamic contact problems

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Pages 403-414
Published online: 26 Apr 2012
 

By introducing unknown Level-Sets fields on contact interface, the Signorini-Moreau dynamic contact conditions are written as equations. From this, a new continuous hybrid weakstrong formulation for dynamic contact between deformable solids is derived. In the global problem, the Level-Sets like fields are the intrinsic contact unknown ones. This problem is discretized by means of time, space and collocation schemes. Some numerical experimentations are carried out, showing the effectiveness of our approach. The paper is ended by showing a promising application of the multiscale Arlequin method to the multiscale impact problems.

En introduisant des champs de signe intrinsèques aux zones de contact, le modèle de Signorini-Moreau est écrit sous forme d’équations. De ce modèle, une nouvelle formulation hybride et continue (faible-forte) est dérivée pour le problème de contact dynamique entre des solides déformables. La formulation obtenue est dicrétisée par un θ-schéma, la méthode des EF et une méthode de collocation. Des exemples numériques montrent la pertinence de l’approche. Le papier se termine par une application prometteuse de la méthode Arlequin au traitement des aspects multi-échelles des problèmes dynamiques de contact.

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