A method to handle mesh switches for non-linear structural analysis in explicit dynamics

Authors:
B. Bourel;A. Combescure
Affiliations:
Université Lille Nord de France, F-59000 Lille, France and UVHC, Laboratoire d'Automatique de Mécanique et d'Informatique industrielles et Humaines, FRE CNRS 3304, F-59313 Valenciennes, ...;Universite de Lyon, INSA Lyon, Laboratoire de Mécanique des Contacts et des Structures, UMR CNRS 5259, 20 Avenue Albert Einstein, 69621 Villeurbanne Cedex, France
Venue:
Finite Elements in Analysis and Design
Year:
2011

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Abstract

This paper describes a method to change the space-time scales for multi-domain calculations in explicit dynamics. The interest of such a method, inspired by mesh refinement techniques, is to improve only when necessary the space (and time) discretisation of one or more sub-domains, during a significant phase of calculation. The fields transfer between the meshes and the reequilibrating of the solution after the mesh switch will be particularly developed. The criterion used to decide the switch mesh will be based on the maximum plastic strain. The proposed method will be illustrated with two examples in the non-linear case.