Characteristics of JOB-9003 in Double Shocks Experiments
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摘要: 采用火炮加载技术对HMX基JOB-9003炸药进行一维平面冲击实验。实验使用的飞片由蓝宝石和Kel-F黏合而成,撞击炸药后,先后传入两道不同压力的冲击波。通过组合式电磁粒子速度计测量撞击界面和炸药内部不同深度处的粒子速度,得到粒子速度-时间图。根据粒子速度-时间图,计算出撞击界面粒子速度和冲击波传播速度,进一步获得炸药雨贡纽关系。根据炸药雨贡纽关系,并对比已有实验数据,通过Pop图说明炸药在二次压缩下的“钝化”特性。Abstract: One-dimensional plate impact experiments were performed to study the double shocks to detonation transition and Hugoniot state in the HMX-based explosive JOB-9003.The flyer was a combination of sapphire and Kel-F, which could pass two different pressure waves after the impact.We measured the particle velocities at the interface and the different depths using the Al-based electromagnetic particle velocity gauge technique, and obtained the particle velocity-time diagram, according to which we calculated the impact velocity, the shock wave velocity, and then the Hugoniot relation of the explosive.By comparing them with the existing experiment data in the Pop plot, we can draw the conclusion that the explosives pressed by the double shocks will exhibit desensitization features.
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Key words:
- double shocks /
- eletromagnetic particle velocity gauge /
- Hugoniot relation /
- Pop plot
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图 5 不同撞击速度下的粒子速度-时间历程(5,6,…,12 mm指该条粒子速度曲线所对应的电磁粒子速度计中金属丝的有效长度; 前驱波、主波压力在3.2节标定)
Figure 5. Particle velocity versus time under different impact velocities (5, 6, …, 12 mm refer to the effective length of Al wire corresponding to each particle velocity curve in the EMV gauge, and the pressures of pre-shock and main shock are specified in Section 3.2)
表 1 单次冲击和二次冲击压缩中前驱波的冲击波速-粒子速度
Table 1. us and up data from pre-shock and sustained pulse
Shot
No.us/
(km/s)up/
(km/s)Shot
No.us/
(km/s)up/
(km/s)Shot
No.us/
(km/s)up/
(km/s)Shot
No.us/
(km/s)up/
(km/s)1 2.871 0.495 10 3.470 0.587 19 3.721 0.693 28 3.921 0.884 2 3.130 0.520 11 3.411 0.591 20 3.748 0.750 29 4.250 1.030 3 3.210 0.525 12 4.270 1.031 21 3.765 0.753 30 4.783 1.342 4 3.213 0.531 13 5.151 1.220 22 3.621 0.758 31 6.692 2.185 5 3.112 0.536 14 3.553 0.628 23 3.941 0.778 1 029 3.498 7 0.381 1 6 3.325 0.547 15 3.502 0.637 24 3.803 0.825 1 102 3.440 7 0.432 3 7 3.320 0.554 16 3.215 0.647 25 4.057 0.858 1 104 3.467 3 0.494 7 8 3.311 0.561 17 3.480 0.650 26 3.856 0.860 1 105 3.667 6 0.558 2 9 3.384 0.584 18 3.578 0.663 27 3.892 0.876 Note:us, up of Shot 1-Shot 31 are obtained from Ref.[5], while those of Shot 1029, Shot 1102, Shot 1104 and Shot 1105 are estimated directly from experiment data. 表 2 前驱波入射压力和界面粒子速度
Table 2. Pressure of pre-shock and particle velocity at the interface
Shot
No.uimp/
(km/s)up/
(km/s)p/
(GPa)1 029 0.831 0.460 6 2.681 8 1 102 0.949 0.480 1 2.830 1 1 104 1.077 0.544 3 3.338 1 1 105 1.206 0.608 3 3.875 0 Note:uimp is obtained directly from experiment. 表 3 前驱波波后各物理量
Table 3. Parameters after the pre-shock
Shot
No.us/
(km/s)up/
(km/s)ρ/
(g/cm3)1 029 3.498 7 0.460 6 2.124 7 1 102 3.440 7 0.480 1 2.144 2 1 104 3.467 3 0.544 3 2.188 6 1 105 3.667 6 0.608 3 2.211 9 Note:us are obtained directly from experiment. 表 4 主波各物理量
Table 4. Parameters of the main shock
Shot
No.us/
(km/s)up/
(km/s)ρ/
(g/cm3)p/
(GPa)1 029 5.651 0 0.674 5 2.124 7 8.098 5 1 102 5.596 1 0.768 3 2.144 2 9.219 0 1 104 5.552 7 0.889 5 2.188 6 10.809 8 1 105 6.237 4 0.951 5 2.211 9 13.127 4 Note:us, up are obtained directly from experiment. 表 5 JOB-9003二次压缩和单次压缩实验数据对比
Table 5. Data from double shocks versus sustained pulse
Sustained pulse[5] Double shocks Pressure/
(GPa)tD/
(μs)Pressure/(GPa) tD/
(μs)tC/
(μs)tD-C/
(μs)Pre-shock Main shock 3.11 2.681 8 8.098 5 1.60 4.17 1.80 2.830 1 9.219 0 2.15 1.47 0.68 6.10 1.10 3.338 1 10.809 8 1.90 1.30 0.60 6.28 1.05 3.875 0 13.127 4 1.65 1.15 0.50 Note:tD and tC are obtained directly from experiment. -
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