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Approche globale / locale non-intrusive : application aux structures avec plasticité localisée

Abstract : This work introduces a method for embedding local details, nonlinear phenomena or innovative features into an industrial finite element problem in a non-intrusive way, ie. without modifying the existing model data or software. It consists in creating a local model of the concerned region, containing the desired features, and then substituting it into the industrial problem, by the means of a solver coupling technique adapted from domain decomposition methods; non-intrusiveness and flexibility are obtained by using both solvers as black boxes and by only exchanging load vectors between the solvers. The method is currently applied to introduce localized plasticity and geometric details into a large linear elastic model. Two kinds of local boundary conditions are studied (Dirichlet and Robin) and a non-intrusive quasi-Newton acceleration technique is introduced, that leads to very fast convergence. Examples are shown using the commercial software package Abaqus, including a large 3D problem provided by our industrial partner Snecma.
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https://tel.archives-ouvertes.fr/tel-00449687
Contributor : Ens Cachan Bibliothèque <>
Submitted on : Friday, January 22, 2010 - 12:44:53 PM
Last modification on : Thursday, December 10, 2020 - 12:32:48 PM
Long-term archiving on: : Thursday, October 18, 2012 - 1:05:58 PM

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  • HAL Id : tel-00449687, version 1

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Lionel Gendre. Approche globale / locale non-intrusive : application aux structures avec plasticité localisée. Mécanique [physics.med-ph]. École normale supérieure de Cachan - ENS Cachan, 2009. Français. ⟨tel-00449687⟩

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