Behaviors of Shock Initiation and after-Initiation for Heterogeneous Explosives

Campbell's and other authors' experimental studies of behaviors of initiation and after-initiation for heterogeneous explosives were introduced and analyzed, but initiation conditions were not dealt with. When an intense shock wave enters a heterogeneous explosive charge, detonation is initiated by the shock wave instantaneously (i. e. not to undergo induction time) and directly (i. e., not to pass through other processes, such as deflagration). Then a building up detonation wave propagates throughout the heterogeneous explosive charge until it develops into a normal detonation. This whole process is called the buildup of detonation with the new definition in this paper. The so-called reactive shock wave is the building up detonation wave in early stage. Buildup of detonation (in terms of new definition) is a characteristic for all secondary explosives. Incomplete reaction and running to complete reaction of explosives are the chemical mechanism of buildup of detonation.