Comptes Rendus
A direct method for the solution of evolution problems
[La méthode directe]
Comptes Rendus. Mécanique, Volume 334 (2006) no. 5, pp. 317-322.

An alternative numerical method to solve structural evolution problems is presented. It belongs to the family of Large Time Increment Methods. The problem is solved on the whole time interval separating a global stage where a SA and KA solution is searched and a local stage where the constitutive law is satisfied. To solve the global stage, consuming the most CPU time, the mechanical fields are decomposed in a wavelet basis and the equilibrium is solved only for the largest coefficients.

Cette Note présente une méthode numérique alternative de résolution de problèmes transitoires. Elle s'inscrit dans le cadre des méthodes à Grand Incrément de Temps ; la solution est recherchée sur la totalité du trajet de chargement en résolvant alternativement un problème dit global où l'on recherche une solution SA et CA et un problème local où on satisfait la loi de comportement. L'étape globale étant la plus coûteuse en temps de calcul, sa résolution se fait en décomposant le chargement sur une base d'ondelettes et en résolvant l'équilibre uniquement pour les coefficients d'ondelettes les plus importants.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2006.02.007
Keywords: Computational solid mechanics, Solids and structures, Large increment, Wavelets
Mots-clés : Mécanique des solides numérique, Solides et structures, Grand incrément, Ondelettes

François Comte 1, 2, 3 ; Habibou Maitournam 1 ; Pierre Burry 2 ; T. Mac Lan Nguyen 2

1 Solid Mechanics Laboratory, CNRS UMR 7649, Department of Mechanics, École polytechnique, 91128 Palaiseau cedex, France
2 PSA Peugeot Citroën, Division of automotive research and innovation, route de Gisy, 78943 Vélizy Villacoublay, France
3 UME, ENSTA, chemin de la Hunière, 91761 Palaiseau, France
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François Comte; Habibou Maitournam; Pierre Burry; T. Mac Lan Nguyen. A direct method for the solution of evolution problems. Comptes Rendus. Mécanique, Volume 334 (2006) no. 5, pp. 317-322. doi : 10.1016/j.crme.2006.02.007. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.02.007/

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