Intrinsic dissipation of a modular anisotropic damage model : application to concrete under impactReport as inadecuate




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1 LMT - Laboratoire de Mécanique et Technologie 2 Laboratoire d-études dynamiques 3 LMT - Laboratoire de Mécanique et Technologie

Abstract : Based on the mathematical proof of the positivity of the dissipation due to anisotropic damage, different numerical scheme to compute such a dissipation in concrete structures are proposed. The positivity of intrinsic dissipation for the considered modular anisotropic damage model is first checked in the case of Willam non-proportional loading test, then checked for different impact tests on concrete structures. Both the consequences of the modeling of the strain rate effect in tension from visco-damage and of the damage deactivation micro-cracks closure for alternated loadings are studied.

Keywords : Anisotropic damage delay-effect concrete intrinsic dissipation impact





Author: Marion Chambart - Rodrigue Desmorat - Fabrice Gatuingt -

Source: https://hal.archives-ouvertes.fr/



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