期刊
PROPELLANTS EXPLOSIVES PYROTECHNICS
卷 38, 期 6, 页码 770-774出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/prep.201300012
关键词
Shock sensitivity; RS-RDX; Pressed PBX; Electric gun
资金
- National Natural Science Foundation of China [10972205, 11272294]
- Science and Technology Foundation of China Academy of Engineering Physics [2012A0201007]
The shock sensitivities of plastic bonded explosives were studied with a thin flyer impact test by using two types of pressed RDX. The thin flyer, driven by an electrically exploding plasma, exerts a short-duration, high-pressure pulse to the samples to trigger a shock-to-detonation process. It was found that the duration and magnitude of the incident shock strongly influence the dominant mode of hot-spot formation, promoting a fast pore collapsing mechanism while suppressing other slower shear or friction mechanisms, as proposed by Chakravarty etal. [1]. The pressed PBX based on reduced sensitivity RDX had higher shock threshold pressure, compared to the pressed PBX based on commercial RDX. The difference was observed even with a certain portion of external extragranular defects. It is postulated that the internal crystal defects are more efficient than the external porosity in terms of the rapid reaction of hot spots.
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