Abstract
Cellular materials are characterized by remarkable mechanical properties with light weight. Such materials are used in various applications mainly in energy absorption. Their microstructure are described by two major families : open and close cell foams. This paper deals with the prediction of the macroscopic behavior of open cell foams in elasticity and viscoelasticity as function of their microstructure. Firstly, we use a micromechanical model based on Cosserat homogenization framework. Secondly, Finite Element (FE) computations are performed on a unit cell subjected to periodic boundary conditions. The results are confronted to various models developped in litterature. Finaly, the linear viscoelastic behavior is deduced from elastic results by taking advantage of correspondence principle.
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