Al/Teflon反应材料的冲击压缩特性与点火行为  

Impact Compression Characteristics and Ignition Behavior of Al/Teflon Reactive Materials

作　　者：常孟周 唐恩凌 韩雅菲 郭凯 陈闯[1] 贺丽萍 徐名扬 CHANG Meng-zhou;TANG En-ling;HAN Ya-fei;GUO Kai;CHEN Chuang;HE Li-ping;XU Ming-yang(Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province,Shenyang Ligong University,Shenyang,110159)

机构地区：[1]沈阳理工大学瞬态物理力学与能量转换材料重点实验室,辽宁沈阳110159

出　　处：《火工品》2021年第6期28-31,共4页Initiators & Pyrotechnics

摘　　要：为探究Al/Teflon反应材料的力学特性和撞击点火行为,加压烧结Al/Teflon反应材料试件并进行霍普金森压杆实验(SHPB),通过分析动态压缩过程中材料压缩-强化-卸载各阶段特性,获得在不同加载速度下的应力、应变时程曲线;并且,通过SHPB实验系统对Al/Teflon反应材料进行高速度加载研究材料的点火行为。结果表明:Al/Teflon材料具有应变率强化效应;点火反应普遍发生在2~3次冲击过程中,且材料的反应过程均处于μs级;火焰演化面积随时间呈先增长后下降的趋势,点火延迟时间随加载速度增加逐渐减小,发生反应的临界应力随加载速度的增加而增大。To explore the mechanical properties and impact ignition behavior of Al/Teflon reactive materials,the Al/Teflon reactive materials specimens were prepared using compression sintering method.Based on the split Hopkinson pressure bar(SHPB)experiments,the stress vs time,strain vs time and stress vs strain relationships were obtained by the analysis of compression-hardening-unloading process.Meanwhile,the ignition characteristics of Al/Teflon reactive materials were obtained by high velocity impact.The results show that the Al/Teflon material has strain rate effect;the ignition reaction generally happens during 2~3 pulses,and the reaction processes are all on the order of microsecond,the flame area increases firstly and then decreases with time,and the ignition delay time is shortened with the increase of impact velocity,while the critical stress increases with the increase of impact velocity.

关 键 词：反应材料 SHPB 力学性能 点火行为 

分 类 号：TQ560.7[化学工程—炸药化工]