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Volume 34 Issue 3
Jun 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(3): 033402.
PENG Wenyang, ZHONG Bin, GU Yan, ZHANG Xu, YANG Shuqi, SHU Junxiang, QIN Shuang. Effects of Metal Interlayer and Air Gap on the Shock Initiation of Insensitive Explosives[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 033402. doi: 10.11858/gywlxb.20190816
Citation: PENG Wenyang, ZHONG Bin, GU Yan, ZHANG Xu, YANG Shuqi, SHU Junxiang, QIN Shuang. Effects of Metal Interlayer and Air Gap on the Shock Initiation of Insensitive Explosives[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 033402. doi: 10.11858/gywlxb.20190816
shu

Effects of Metal Interlayer and Air Gap on the Shock Initiation of Insensitive Explosives

doi: 10.11858/gywlxb.20190816
  • 1.

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

  • 2.

    Department of Graduate Students, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

  • Received Date: 27 Jul 2019
  • Rev Recd Date: 30 Aug 2019
  • Publish Date: 25 Nov 2019
    Abstract
  • The influences of air gap and metal interlayer on the shock initiation of the $\varnothing $50 mm stepped explosive B have been investigated by means of the sapphire flyer planar impact experiment and photonic doppler velocimetry (PDV) technique. In the experiment, a lithium fluoride (LiF) window was stuck to the rear interface of explosive sample to allow the rear interface velocity between the metal and the sample explosive be measured by PDV technique. Both the transmission shock pressure and the incident shock pressure can be obtained by the impedance-match method. The experiment results have shown that the air gap divided the impact compression process into quasi-isentropic compression and impact compression, respectively, and at the same time, the amplitude of the shock pressure was declined. Specifically, the shock wave attenuation range caused by 5 mm thick metal was achieved. When the explosive A was used as the booster, and with a 0.3 mm thick air gap and 5 mm thick metal experimental setup, the reaction of sample explosive B started in a range from 7 mm to 10 mm.

     

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