含金属微粉泡沫材料中爆炸波衰减规律实验研究

设计并制备了一种新型的聚氨酯泡沫材料,研究了爆炸波在该材料中的衰减规律.材料的主要设计原理是在聚氨酯材料中均匀混合了10μm量级的金属微粉,以提高骨架的吸热能力,从而提高其抗爆性能.搭建了实验平台并分别测量了爆炸波在相同孔隙率下含金属微粉和不含金属微粉的聚氨酯材料,同时测量了不同金属微粉含量的聚氨酯材料中的传播特性.实验结果表明:含金属微粉的聚氨酯材料具有更好的抗爆性能.

EXPERIMENTAL STUDY OF ATTENUATION OF BLAST WAVES IN POLYURETHANE FOAMS WITH METALLIC PARTICLES

To improve the capability of energy absorption, a new type of polyurethane foams is designed and produced; the process of the blast wave propagating into this material is investigated. The main design principle of the material is as follows: by adding a certain amount of metallic particles with diameter of about 10\,$\mu$m into polyurethane foams, the heat absorption capacity of the material is enhanced so that its capacity for resisting blast is improved. The pressures of blast wave propagating into polyurethane foams with or without metallic particles, and with different amounts of metallic particles, are measured by using piezoelectric pressure transducers, respectively. The results show that the polyurethane foams with metallic particles have a better performance in resisting blast wave than those without metallic particles.