具有球形胞体结构的泡沫塑料弹性常数的确定

DETERMINATION OF ELASTIC CONSTANTS FOR FOAM PLASTICS HAVING SPHERICAL CELL STRUCTURE

通过微分法导出了泡沫塑料剪切模量和体积模量所满足的微分方程组，并利用泡沫塑料各向同性弹性常数间满足的关系求解；得到了泡沫塑料剪切用量与体积模量的关系，确定了剪切模量与材料孔隙比的关系；并且将本文结果同其他已有模型进行了对比．

The differential equations about shear and bulk moduli of foam plastics have been derived by differential scheme of composite mechanics. And the couple equations have been solved by using the relation of elastic constants for isotropic foam plastics. The relationships between shear modulus and bulk modulus as well as shear modulus and porosity of material have been obtained theoretically. Finally, both Young's modulus and Poisson's ratio in relation with porosity have also been determined. The comparison between the present model and other models has been made graphically.