TY - JOUR
T1 - Initiation and detonation growth characteristics of polymer bonded explosives under ramp-wave loadings
AU - Bai, Zhiling
AU - Duan, Zhuoping
AU - Liu, Haiqing
AU - Cai, Jintao
AU - Ou, Zhuocheng
AU - Wang, Guiji
AU - Huang, Fenglei
N1 - Publisher Copyright:
© 2019 Author(s).
PY - 2019/4/21
Y1 - 2019/4/21
N2 - 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 P0 varies from 5.4 GPa to 12.4 GPa with the range of the peak ramp loading rate being from 11.6 GPa/μs to 31.3 GPa/μs. 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.
AB - 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 P0 varies from 5.4 GPa to 12.4 GPa with the range of the peak ramp loading rate being from 11.6 GPa/μs to 31.3 GPa/μs. 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.
UR - http://www.scopus.com/inward/record.url?scp=85065919681&partnerID=8YFLogxK
U2 - 10.1063/1.5064544
DO - 10.1063/1.5064544
M3 - Article
AN - SCOPUS:85065919681
SN - 0021-8979
VL - 125
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 15
M1 - 155901
ER -
