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Initiation and detonation growth characteristics of polymer bonded explosives under ramp-wave loadings

机译：斜波载荷下聚合物粘结炸药的起爆和爆轰生长特性

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摘要

An experimental research approach is proposed to investigate the initiation and detonation growth characteristics of polymer bonded explosives (PBXs) under ramp-wave loadings, in which a magnetic compression device and a multichannel photonic Doppler velocimetry are taken as the ramp-wave loading and the measurement systems, respectively. The ramp loadings have a rise time of 530 ns, and the peak pressure P-0 varies from 5.4 GPa to 12.4 GPa with the range of the peak ramp loading rate being from 11.6 GPa/mu s to 31.3 GPa/mu s. Five PBX specimens in different thicknesses were compressed simultaneously until detonation occurs in some of the specimens. All the particle-velocity histories on the reverse side of each sample were measured, which characterizes both the ignition and the detonation growth processes. It is found, under the ramp-wave loadings, that no significant chemical reaction inside the explosive occurs before a strong precursory shock-wave is formed, and the ignition and detonation growth processes are still dominated by the shock-wave induced hot-spots mechanism. Moreover, the experimental data are also found to be basically in good agreement with the numerical results simulated by using the DZK (named Duan-Zhang-Kim) reaction rate model with a pressure threshold, which implies that the ramp-wave loading experimental technique is also practicable for investigating the ramp-induced shock initiation and detonation growth characteristics of PBXs. Published under license by AIP Publishing.
机译：提出了一种实验研究方法来研究斜波载荷下聚合物粘结炸药（PBX）的起爆和爆轰生长特性，其中以电磁压缩装置和多通道光子多普勒测速仪为斜波载荷并进行测量。系统。斜坡加载的上升时间为530 ns，峰值压力P-0在5.4 GPa至12.4 GPa之间变化，峰值加载速率的范围为11.6 GPa /μs至31.3 GPa /μs。同时压缩五个厚度不同的PBX标本，直到其中一些标本发生爆炸。测量了每个样品反面上的所有粒子速度历史记录，这些历史记录了着火和爆轰生长过程的特征。发现在斜波载荷下，爆炸物内部没有发生明显的化学反应，而形成强烈的前驱冲击波，而引爆波的热点机制仍然主导着爆炸和爆炸的增长过程。 。此外，还发现实验数据与使用带有压力阈值的DZK（称为段-张-金）反应速率模型模拟的数值结果基本吻合，这表明斜波加载实验技术是也可用于研究PBX的斜坡诱发的冲击起爆和爆炸增长特性。由AIP Publishing授权发布。

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  • 来源
    《Journal of Applied Physics》 |2019年第15期|155901.1-155901.10|共10页
  • 作者

    Bai Zhiling; Duan Zhuoping; Liu Haiqing; Cai Jintao; Ou Zhuocheng; Wang Guiji; Huang Fenglei;

  • 作者单位

    Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

    China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Peoples R China;

    Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

    China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Peoples R China;

    Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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