Abstract
AbstractDrop‐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.
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