Abstract
This study proposed 3-dimensional homogenized finite element analysis of polymer foam. The effect of microstructure on macroscopic mechanical behavior was evaluated by using this code. The hyperelasticity was applied to the simulation code to consider non-linear mechanical characteristics of matrix of polymer foam. A part of the microstructure was applied to the unit cell for homogenization method, and it was under the periodic boundary condition. The unit cell was supposed to have either spherical or cubical void (called cell) in the center of the unit cell. The calculated stress-strain curve showed good agreement with the experimental results. As a result of comparison between spherical-cell model and cubical-cell model, considering cell shape was found to be important in improving the accuracy of calculating mechanical characteristics of polymer foam.
