Inserted: 19 sep 2013
Last Updated: 2 mar 2016
Journal: Annales de l'Institut Henri Poincaré
We illustrate a simple case of interaction between the processes of quasi-static evolution and homogenization. We consider a mixture of two one-dimensional elastic composites subject to damage (following the model of Francfort and Marigo). In this case we have a relaxation phenomenon: the limit of the variational evolutions with fixed space scale tends to a relaxed evolution which is not the evolution of the homogenized energies. We explicitly characterize the relaxed evolution as the one corresponding to a double-damage material (i.e., a homogeneous material with two possibility of damaged states and related dissipations).