Investigation into Elastic Properties of Closed-Cell Foam Based on the Voronoi Random Anisotropic Model

Based on the Voronoi random model for closed-cell foam,the effects of model irregularity,relative density and non-uniformity of cell wall thickness on anisotropic elastic properties of closed-cell foams were investigated.The results obtained was compared with theoretical predicted results and experimental values.Results indicate when the shape of models are the same,the relative density has a small effect on the Poisson′s ratio and elastic modulus anisotropy ratio,the random cell wall thickness has a reducing effect on the anisotropic elastic modulus,but the effects on the Poisson′s ratio and elastic modulus anisotropy ratio is very small;the random level of the foam shape has a reducing effect on the elastic modulus,Poisson′s ratio and elastic modulus anisotropy ratio.