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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2013004244
pages 429-446

FACTORS INFLUENCING IGNITION AND EXPLOSION CHARACTERISTICS OF EXPLOSIVES UNDER DROP WEIGHT IMPACT

Qi Zhang
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Shaoqiao Hu
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

RESUMO

Impacting explosive cylinders with a shell of steel by the use of drop weight is the experimental standard to examine the impact sensitivity of explosives in China. Whether the prescriptive experimental parameters in the standard are reasonable or not needs to be investigated. It is difficult to observe the detailed processes of ignition and explosion for the explosive cylinder with a shell of steel under impact of drop weight in the experiment. The detailed information of the ignition and explosion for the impacted explosive cylinders corresponding to the standard experimental condition was investigated by numerical simulation in this study. The numerical results show that the 1.8 cm thickness of shell currently prescribed is most suitable. If the thickness of the steel shell in the impact experiments is less than 1 cm, the experimental results do not simulate the real state conditions of the impacted explosive cylinder in the process of launching. The predicted time initiating explosion (duration from beginning of load impacting the explosive cylinder to initiating explosion) under the standard experimental condition is on the order of 100 µs.


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