The Role of Aluminum in the Detonation and Post‐Detonation Expansion of Selected Cast HMX‐Based Explosives
The Role of Aluminum in the Detonation and Post‐Detonation Expansion of Selected Cast HMX‐Based Explosives
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DOI：
10.1002/prep.201100138
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
V. Manner;Steven J. Pemberton;Jake A. Gunderson;Tommy J. Herrera;J. M. Lloyd;Patrick J. Salazar;
中科院分区：
文献类型：
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作者：
V. Manner;Steven J. Pemberton;Jake A. Gunderson;Tommy J. Herrera;J. M. Lloyd;Patrick J. Salazar;
为了更好地了解铝在非理想炸药混合物中的作用，在一系列圆筒试验和推板试验中分析了浇注固化配方。本研究描述了在不同时间范围内，15%铝（中值粒径为3.2 μ m）与氟化锂（铝的惰性替代品;<5 μ m）在浇铸固化HMX配方中的贡献。进行了小圆筒试验以分析这些配方的爆轰和壁面速度（1 - 20 μ s）。用钢板加速法测量了直径为58 mm的球形装药在152 mm和254 mm处的近场爆炸效应。在1.52米处的压力测量给出了几毫秒处自由场压力的信息。虽然所有配方的爆轰速度都在不确定范围内，但在≥ 2 μ s时，铝配方的气缸壁速度、板速度和压力明显更高。此外，还进行了流体代码计算，以确定非理想行为如何影响平板试验结果。总的来说，这项工作给出了一个更清晰的画面，铝如何有助于爆炸的时间尺度从1 μ s到约2毫秒，以及如何爆炸后的能量释放有助于壁速度和爆炸效果。实验表明，显著的铝反应发生在CJ平面之后，并且在后期继续有助于膨胀。
In order to improve understanding of how aluminum contributes in non-ideal explosive mixtures, cast-cured formulations have been analyzed in a series of cylinder tests and plate-pushing experiments. This study describes the contribution of 15 % aluminum (median size of 3.2 μm) vs. lithium fluoride (an inert substitute for aluminum; <5 μm) in cast-cured HMX formulations in different temporal regimes. Small cylinder tests were performed to analyze the detonation and wall velocities (1–20 μs) for these formulations. Near-field blast effects of 58 mm diameter spherical charges were measured at 152 mm and 254 mm using steel plate acceleration. Pressure measurements at 1.52 m gave information about free-field pressure at several milliseconds. While the observed detonation velocities for all formulations were within uncertainty, significantly higher cylinder wall velocities, plate velocities, and pressures were observed for the aluminum formulations at ≥2 μs. Additionally, hydrocode calculations were performed to determine how non-ideal behavior affected the plate test results. Collectively, this work gives a clearer picture of how aluminum contributes to detonation on timescales from 1 μs to about 2 ms, and how the post-detonation energy release contributes to wall velocities and blast effects. The experiments indicate that significant aluminum reactions occur after the CJ plane, and continue to contribute to expansion at late times.