Fragmentation Analyses of Granular Explosive Under Drop Weight Impact

Fragmental size and distribution of explosive particles play a more important role in the formation of hot-spot than original particles size under drop weight impact. Because the particles breakage and the hot-spots ignition will form in a sequence between fragments and between the fragments and the drop weight surface under the impact. In this paper, the size and distribution of the cyclotetramethylenete tranitramine(HMX) fragments were analyzed by the Laser Particle Size Analyzer Malvern MS2000. The post-analysis results of fragments showed that size distribution of fragments was strongly dependent on drop height. An empirical formula is established to describe the relationship between the average size and drop height. The volume-based probability distribution of explosive fragments was also studied by experiments and theoretical calculations.