20213 均質化理論を用いた発泡材料の特性評価手法の開発(OS3-6【高分子系複合材料の成形と力学的特性(6)】)

Abstract

In this paper, development of evaluation method for foam materials under large deformation using homogenization theory was described to analyze the mechanical characteristics of foam materials. The foam materials are applied to packing material, automobile seat and sports equipment The mechanical uniaxialensile tests using foam materials were conducted to investigate the effect of the microscopic structure on the mechanical characteristics. The porosity of the specimens was 26%, 61%, 66%, 76%, and the pore shape was nearly spherical. In the simulation the deformation of microscopic structure was uniform, and microscopic periodicity was kept under large deformation. The polymer matrix was supposed to have incompressible hyperelasticity, and the hyperelasticity was represented by Mooney-Rivlin model. The applicability of the proposed model for the foam materials was shown by comparing the numerical simulation with the mechanical loading test results. The effect of the microscopic structure on the mechanical characteristics was shown.