Analysis of the elastic properties of open-cell foams with tetrakaidecahedral cells

摘要: The elastic constants of an open-cell foam model, having tetrakaidecahedral cells on a BCC lattice, were found. Young's modulus, shear modulus and Poisson's ratio derived, as functions the edge cross section density, by considering bending, twisting extension cell edges. If bending only mechanism moduli would vary with square density. other deformation mechanisms are predicted to reduce power law exponent 3–5%, effect torsion level is small. bulk linearly its relative so approaches 0.5 at low densities. lattice model elastically isotropic, whereas models foams highly anisotropic.