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Multi-scale failure of heterogeneous materials: a double kinematics enhancement for Embedded Finite Element Method

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2015
auteur(s) Roubin Emmanuel; Vallade Alexis; Benkemoun Nathan; Colliat Jean-Baptiste
journal (abréviation) International Journal of Solids and Structures (Int J Solid Struct)
volume (numéro) 52
pages 180 – 196
résumé This paper presents a Finite Element model for the modeling of the failure of heterogeneous material at the meso-scale. This model is cast into the framework of the Enhanced Finite Element Method (E-FEM). Two kinds of enhancement are performed: (1) in the displacement field (strong discontinuity approach) in order to take into account micro-cracks, (2) in the strain field (weak discontinuity) in order to take into account heterogeneities without any mesh adaptation. Mechanical applications (uniaxial tension and compression loading, non-proportional loading) are performed in the context of cementitious materials such as concrete. We show the capability of the model to represent some of the main features of such materials observed at macro-scale.
mots clés Heterogeneous quasi-brittle material; Strong discontinuity approach; E-FEM method; EAS method
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