低冲击加载下JOB-9003炸药的反应阈值

李金河; 傅华; 曾代朋; 李涛

doi:10.11883/1001-1455(2015)06-0876-05

低冲击加载下JOB-9003炸药的反应阈值

doi: 10.11883/1001-1455(2015)06-0876-05

中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室，四川绵阳 621999

详细信息

作者简介:
李金河(1979—), 男, 学士, 助理研究员, leejinhe103@163.com

中图分类号: O381
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出版历程
- 收稿日期: 2014-04-17
- 修回日期: 2014-07-15
- 刊出日期: 2015-12-10

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

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 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。
- 爆炸力学 /
- 反应阈值 /
- 电磁粒子速度计 /
- 界面粒子速度 /
- 飞片 /
- 火药炮
Abstract: 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.
- mechanics of explosion /
- reaction threshold /
- electromagnetic particle velocity gauge /
- interface particle velocity /
- flyer /
- gas gun

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图 1 实验布局示意图

Figure 1. Schematic drawing of experimental layout

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图 2 典型的界面粒子速度实验波形

Figure 2. Typical experimental waves of interface velocity

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图 3 测量界面粒子速度结果与未反应炸药计算结果对比

Figure 3. Comparison of interface particle velocity of experiment and calculation

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图 4 界面粒子速度与入射压力关系图

Figure 4. Interface particle velocity vs. input pressure

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表 1 材料参数^[12]

Table 1. material parameters

材料	c/(mm·μs^-1)	λ	ρ/(g·cm^-3)
JOB-9003	2.49	2.09	1.84
PMMA	2.60	1.52	1.19
Al	5.25	1.39	2.78
不锈钢(0Cr18Ni9)	4.69	1.33	7.80

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表 2 界面粒子速度随加载压力的变化情况

Table 2. Interface particle velocity of explosives vs. input pressure

实验	飞片	v/(m·s^-1)	p/GPa	u_pn/(m·s^-1)	u_pr/(m·s^-1)	u_pc/(m·s^-1)	备注
1	Al	320	1.28	152	152	153	未反应。取u_pr=u_pn。
2	Al	365	1.42	185	185	182	未反应。取u_pr=u_pn。
3	Al	450	1.75	235	305	235	慢反应。
4	Al	476	2.02	287	647	244	慢反应。
5	Al	524	2.26	319	788	273	慢反应。
6	Al	595	2.62	418	958	305	快速反应。
7	Al	624	2.78	455	1417	316	快速反应。
8	Steel	565	3.08	515	2280	335	爆炸。u_pn根据未反应实验点拟合得到。

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参考文献(15)

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