%0 Journal Article
%T Size effects for micro-fractured bodies under compressive loading
%A Dobrovat A.M.
%A Dascalu C.
%A Bilbie G.
%A Nguyen M.T.
%J Theoretical and Applied Mechanics
%D 2011
%I Serbian Society of Mechanics, Belgrade
%R 10.2298/tam1104347d
%X A two-scale damage model for micro-fractured media is constructed using the asymptotic homogenization method. At the small-scale level, we consider locally periodic microstructures of two-types: micro-cracks nucleating from pores and wing-type micro-cracks. Based on an energy criterion for micro-crack propagation we deduce the macroscopic damage model, without supplementary assumptions on the overall behavior. We show that the resulting two-scale model has the property of capturing a micro-structural length - the distance between neighbor micro-cracks. The influence of the micro-structural parameters on the effective behavior is studied. We illustrate the capacity of the model to predict size effects under compression loadings.
%K micro-cracks
%K wing-type
%K pores
%K homogenization
%K asymptotic developments
%K damage
%K size effects
%K compression loading
%U http://www.doiserbia.nb.rs/img/doi/1450-5584/2011/1450-55841104347D.pdf