通过在开孔泡沫铝中填充聚氨酯得到了聚氨酯泡沫铝,利用Hopkinson杆对泡沫铝与泡沫聚氨酯组成的三维连续网络增强复合材料进行了在不同相对密度、应变率和聚氨酯含量下的动态压缩实验.结果表明,在相同应变率和相对密度下,与泡沫纯铝相比,聚氨酯泡沫铝屈服强度和压缩应变量显著增加,而且应力-应变曲线出现明显的抖动.随着应变的不断增大,应力也逐渐增加,在达到某一相同的应变时,聚氨酯泡沫铝的应力值较高,吸能量也较多.另外,当应变率增加时,聚氨酯泡沫铝表现出很明显的应变率效应.
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