Behaviour of cellular material under dynamic loadings. Part 1: a macroscopic point of view

Behaviour of cellular material under dynamic loadings. Part 1: a macroscopic point of view. A multi-scale methodology is proposed for the study of the cellular material behavior under dynamic loading. The behavior of polymeric foams studied depends on the constitutive material and the morphology of the porous structure. The approach proposed for this study consists in developing experimental methods to impose dynamic loadings on these materials in order to measure their macroscopic response (for the identification of model parameters) and to observe and quantify the response of the foam structure. The final objective is a multi-scale modeling taking into account these physical phenomena to reproduce the macroscopic behavior. Methods and experimental techniques were developed to characterize the multi scale behavior of cellular material. Results obtained on polymeric foams at macroscopic scale constituted a database required for the identification of models implemented in the last versions of Finite-Element Software. This article presents the experimental apparatus and the results obtained at the macroscopic scale.