Multiaxial behavior of foams - Experiments and modeling

Cellular materials are strongly related to pressure level inside the material. It is therefore important to use experiments which can highlight (i) the pressure-volume behavior, iii) the shear-shape behavior for different pressure level. Authors propose to use hydrostatic compressive, shear and combined pressure-shear tests to determine cellular materials behavior. Finite Element Modeling must take into account these behavior specificities. Authors chose to use a behavior law with a Ilyperelastic, a Viscous and a Hysteretic contributions. Specific developments has been performed on the Elyperelastic one by separating the spherical and the deviatoric part to take into account volume change and shape change characteristics of cellular materials.