聚氨酯复合泡沫塑料的准静态压缩力学性能

针对几种不同密度、不同空心球填充比的聚氨酯复合泡沫塑料进行了准静态压缩实验，研究了这类材料的宏观力学性能。结果表明，复合泡沫塑料的密度仍是影响其力学性能的主要因素，并且在低速压缩下具有明显的应变率效应。此外，发现空心玻璃微珠对泡沫塑料有明显的增强效果，且不同密度的泡沫塑料均存在某一临界填充比，超过该填充比，复合泡沫塑料的力学性能可能会恶化。

Mechanical Properties of Polyurethane Syntactic Foams Under Quasi-Static Compression

Some quasi-static compressive experiments of polyurethane syntactic foams with different density and different volume fraction of hollow glass micro-spheres are conducted. The macroscopic mechanical properties of those materials have been investigated.The experimental results show that the density of syntactic foams is still the main factor affecting their mechanical properties and they have significant strain-rate effects in the case of low speed compression.In addition,it is found that the hollow glass micro-spheres have significant reinforing effects on foams and there is a certain critical filling ratio for different density foam.If the volume fraction of hollow glass micro-spheres is larger than the critical filling ratio,the mechanical properties of syntactic foams may be degenerated greatly.