低冲击加载下JOB-9003炸药的反应阈值

发展了一种研究炸药反应阈值的实验方法和分析技术:采用火药炮发射飞片的加载技术产生低冲击加载压力，应用电磁粒子速度计测量JOB-9003炸药后界面与PMMA之间界面粒子速度。通过分析界面粒子速度曲线，得到了低冲击加载下炸药与PMMA之间的界面粒子速度历史，获得了入射压力与未反应和反应后的界面粒子速度之间的u_p-p关系。JOB-9003炸药在低冲击加载下的化学反应阈值和点火阈值分别为1.42、2.62 GPa。

The reaction threshold of JOB-9003 explosive under low amplitude loading

A novel experimental technique to study the reaction threshold of explosives is developed. The flyer is accelerated to an expected velocity to gain a low amplitude loading by the gas gun. The interface particle velocity between JOB-9003 and PMMA under different stresses is measured with electromagnetic particle velocity gauges. The interface velocities of unreacting and reacting explosive are achieved based on the curve of the explosive interface particle velocity. The relationship ofu_p-p is achieved according to interface velocity of unreacting and reacting explosives. The chemical reaction threshold and the ignition threshold of JOB-9003 are 1.65 GPa and 2.62 GPa under the low amplitude loading.