高水速凝MAP材料的动态力学性能研究

Research on Dynamic Mechanical Properties of Polymer Colloid MAP Materials

柔性防爆是反恐行动中防简易爆炸装置爆炸破坏的一种新方式。为将爆炸冲击波能安全转换成液体动能,研究了一种高分子MAP材料。采用MAP作为基料,加水迅速发生溶剂化作用形成胶体。分别获得了其凝胶时间随浓度、温度的变化关系。采用SHPB实验装置进行动力学性能测试,获得了不同浓度胶体材料的应力-应变曲线。结果表明,胶体材料具有应变率相关特性。基于材料具有应变、应变率相关特性,建立了适合该胶体材料的本构关系模型。对试验结果进行拟合,获得了胶体材料不同配比下的动态本构关系。经过对比,可选用不低于1.8%浓度的胶体材料作为防爆液体材料。

Flexible anti-explosion is a new approach to defend against the explosion damage of anti-improvised explosive devices in counter-terrorism operation. A polymer colloid materials is researched in order that the shock wave energy can be safely converted into kinetic energy of liquid. MAP is used as the base material,which is rapidly solvated to form colloid upon encountering water. The relations between gelation time with concentration and temperature are obtained,respectively. The stress-strain curves obtained of colloidal materials with different concentrations are obtained from SHPB experiments. The results show that the colloidal material has a strain rate dependent property. A constitutive model is established for the materials with strain and strain rate dependent property. The dynamic constitutive relations of colloidal materials with different concentrations are obtained. The colloidal material with more than 1. 8% concentration could be chosen as a liquid material for anti-explosion.