A two-scale time-dependent model of damage: Influence of micro-cracks friction

Abstract : The aim of this paper is to present a micro-mechanical damage model for quasi-brittle materials that accounts for friction effects on microcracks. We use homogenization based on asymptotic developments to deduce the overall damage behavior starting from explicit descriptions of elementary volumes with micro-cracks. A time-dependent propagation criterion is assumed for the evolution of cracks at the small scale. An appropriate micro-mechanical energy analysis is proposed leading to a damage evolution law that accounts for friction effects, strain rate dependency, stiffness degradation, material softening and size effects. Numerical results are presented in order to illustrate the local and structural effective damage response. Mesh-independency is proved for the finite-element solutions, as a consequence of the regularizing effect of time.
Type de document :
Article dans une revue
European Journal of Mechanics - A/Solids, Elsevier, 2015, 49, pp.345-361. 〈10.1016/j.euromechsol.2014.08.006〉
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01513862
Contributeur : Lem3 Ul <>
Soumis le : mardi 25 avril 2017 - 15:04:40
Dernière modification le : mercredi 12 septembre 2018 - 01:26:21

Identifiants

Citation

Aleksandra Wrzesniak, Cristian Dascalu, Pierre Bésuelle. A two-scale time-dependent model of damage: Influence of micro-cracks friction. European Journal of Mechanics - A/Solids, Elsevier, 2015, 49, pp.345-361. 〈10.1016/j.euromechsol.2014.08.006〉. 〈hal-01513862〉

Partager

Métriques

Consultations de la notice

174