Elastic Modulus of Tetrakaidecahedron Closed-Cell Cellular Materials

Based on the principle of pore formation, geometric model to describe the closed-cell cellular materials is constructed. The model is tetrakaidecahedron shape with all thick edges. The dependence of relative density on microstructure of the model has been analyzed. By using finite elements method, the relative elastic modulus of the model is calculated. Wall-thickness and wall-face connective curvature radius are found to be the two independent factors affecting relative density. Nonlinearity which relative density produces on relative elastic modulus is obviously greater than one which wall thickness produces. For high and low porosity cellular materials, the materials added at the intersecting part of the wall-faces bring different influence on elastic modulus.