Based on the Voronoi random model for closed-cell foam

the effect of nonuniformity of cell wall thickness on isotropic and anisotropic elastic properties of closed-cell foams was investigated.The combined effect of random cell wall thickness and model irregularity was also discussed.Results indicate that the random cell wall thickness has a reducing effect on the isotropic and anisotropic elastic moduli

and such effect of random cell wall thickness is less than that of model irregularity for isotropic foams

contrary to anisotropic foams;however

the effect of random cell wall thickness on the Poisson's ratio for closed-cell foam is very small.