空心微珠填充聚氨酯泡沫塑料的力学性能

对不同密度和不同填充质量比的空心玻璃微珠填充聚氨酯泡沫塑料进行拉、压实验，研究了微珠对复合泡沫塑料力学性能的影响。实验结果表明:复合泡沫塑料拉伸曲线特征与普通泡沫塑料类似，但具有不同于普通泡沫塑料的压缩应力-应变特性；材料密度越大，微珠对胞体壁的增强效果越好；微珠团聚和界面粘结不良将可能导致材料力学性能的下降。根据有限元模拟结果和试件破坏形貌的观察探讨了材料的变形和破坏机制。 

Mechanical properties of polyurethane foams filled by micro-spheres

The tensile and compressive experiments of the polyurethane syntactic foams filled by hollow glass micro-spheres with different densities and mass fractions of micro-spheres were carried out to investigate the influence of micro-spheres on the mechanical properties. The experimental results show that the features of the tensile curves for the filled syntactic foams are similar to those of the conventional foams. However，the compressive characteristics of stress-strain relation of the filled syntactic foams differ from those of the conventional foams. With increasing of the material density，the micro-spheres have better reinforced effect on the resin matrix. It is found that the micro-sphere cluster and bad bonding at the interface between the  micro-spheres and the resin would probably lead to the decline of mechanical properties. According to the simulation results using the finite element method and the observation of the damaged samples，the deformation and failure mechanism of the material were discussed.