Intrinsic dissipation of a modular anisotropic damage model : application to concrete under impact

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.
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Marion Chambart, Rodrigue Desmorat, Fabrice Gatuingt. Intrinsic dissipation of a modular anisotropic damage model : application to concrete under impact. Engineering Fracture Mechanics, Elsevier, 2014, 127, pp.161-180. ⟨10.1016/j.engfracmech.2014.06.006⟩. ⟨hal-01016916⟩

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