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Shock Initiation of Covered Flake JH‐2 High Explosive by Simultaneous Impact of Multiple Fragments
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-04-17 , DOI: 10.1002/prep.201900366 Yi‐Ming Li 1 , Wen‐Bin Li 1 , Qing Zhang 1 , Xiao‐Ming Wang 1 , Jun‐Hao Liu 1 , Ping Song 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2020-04-17 , DOI: 10.1002/prep.201900366 Yi‐Ming Li 1 , Wen‐Bin Li 1 , Qing Zhang 1 , Xiao‐Ming Wang 1 , Jun‐Hao Liu 1 , Ping Song 1
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Advances are continually being made on shock initiation of heterogeneous explosives by single fragment impact. However, most research on shock initiation of heterogeneous explosives by multiple fragment impact is still in simulation stage owing to the limitations of testing conditions and methods, and experiments on it are rare. In this study, an experiment was conducted on shock initiation of the covered flake JH‐2 high explosive (HE) by simultaneous multiple fragment impact. The response level of the explosive under impact is determined by the damage degree of the cover plate and classified into detonation, explosion, deflagration and burn or no reaction. The u 2d Held criterion was used to calculate the critical threshold I cr of each JH‐2 failure mode under the plate‐sandwich charging structure. Results indicated the JH‐2 HE deflagration occurs as I cr reaches 3570.91 m3/s2 by a single fragment impact, explosion occurs as I cr reaches 6267.69 m3/s2, and detonation I cr reaches 7232.41 m3/s2. Increasing the number of fragments reduces the I cr of JH‐2 HE each response level. The response level of multiple fragments impact is a multiple of single‐fragment.
中文翻译：
多个碎片同时撞击而引发的盖片状JH-2高炸药的冲击起爆
通过单碎片撞击在异质炸药的冲击引发方面不断取得进展。然而，由于测试条件和方法的局限性，多数关于多片冲击的非均质炸药冲击引发研究仍处于仿真阶段，对其进行的实验很少。在这项研究中，通过同时发生多个碎片撞击，对覆盖的片状JH-2高炸药（HE）进行冲击引发实验。爆炸物在撞击下的反应程度取决于盖板的损坏程度，分为爆炸，爆炸，爆燃，燃烧或无反应。使用u 2 d Held准则计算临界阈值I cr板夹心式充电结构下每种JH-2失效模式的变化。结果表示为发生JH-2 HE爆燃我CR达到3570.91米3 /秒2由单个片段的影响，因为爆炸发生我CR达到6267.69米3 /秒2，并且爆震我CR达到7232.41米3 /秒2。增加片段数会降低每个响应级别的JH-2 HE的I cr。多个片段影响的响应级别是单个片段的倍数。
更新日期：2020-04-17
中文翻译：
多个碎片同时撞击而引发的盖片状JH-2高炸药的冲击起爆
通过单碎片撞击在异质炸药的冲击引发方面不断取得进展。然而，由于测试条件和方法的局限性，多数关于多片冲击的非均质炸药冲击引发研究仍处于仿真阶段，对其进行的实验很少。在这项研究中，通过同时发生多个碎片撞击，对覆盖的片状JH-2高炸药（HE）进行冲击引发实验。爆炸物在撞击下的反应程度取决于盖板的损坏程度，分为爆炸，爆炸，爆燃，燃烧或无反应。使用u 2 d Held准则计算临界阈值I cr板夹心式充电结构下每种JH-2失效模式的变化。结果表示为发生JH-2 HE爆燃我CR达到3570.91米3 /秒2由单个片段的影响，因为爆炸发生我CR达到6267.69米3 /秒2，并且爆震我CR达到7232.41米3 /秒2。增加片段数会降低每个响应级别的JH-2 HE的I cr。多个片段影响的响应级别是单个片段的倍数。
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