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Influence of Particle Size of Explosive on Ignition Mechanism Under Low Velocity Impact
Author(s) -
Guo Hongfu,
Zhang Fan,
Zhao Chengzhong,
Zhang Zhao,
Yuan Baohui
Publication year - 2021
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202000121
Subject(s) - ignition system , explosive material , drop (telecommunication) , materials science , particle size , work (physics) , mechanics , particle (ecology) , drop impact , mechanism (biology) , composite material , minimum ignition energy , forensic engineering , thermodynamics , mechanical engineering , chemistry , chemical engineering , physics , engineering , oceanography , organic chemistry , quantum mechanics , geology , wetting
Drop‐weight impact experiments are performed on different particle size Octahydro‐1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocine (HMX) granular explosives. The drop‐weight impact machine is equipped with the high‐speed photographic systems for obtaining a mechanical‐chemical image of the impact process. The experimental image shows that the small particles of 700 μm have melted for a long time and over a large area during the loading process. HMX particle size affects the ignition mechanism. For a single particle, the ignition mechanism changes from friction to viscous heating with the decrease of particle size. The ignition mechanism of 6000 μm and 1800 μm HMX particles is friction work. The ignition mechanism of HMX small particles of 700 μm includes friction work and viscous heat under drop weight impact.