Reaction Localizations in Crystalline Explosives Subjected to Strong Shock
The results of recent researches are overviewed in this paper focusing on two emerging topics: how reaction localization arises when crystalline explosive material is subjected to shock and why and how much the reaction zone is perturbed when the self-adjusted detonation has established. The dominant role of shear driven plastic deformation in the reaction spot origination and in the subsequent dissipation scenario is disclosed in wide range of PBX sample sizes: from 1 mm3 (single HMX crystal within the binder) up to few cm3. Formation of thermal precursors at SDT has been discussed revealing the radiation heating mechanism. General regularities in the genesis of reaction sites are presented and discussed revealing that at three global scales, microscopic, mesoscopic and macroscopic, the gradient of pressure has a major role at the genesis of hot spots whereas a solely pressure plays a dominant role in their further progress. Experimental evidences are presented showing that dissipative structures spatially localized in detonation flow are adversely affecting the performance of the PBX-driven inertial confinement.
reaction localization shear driven plastic deformation dissipative structure ejecta detonation reaction zone SDT
Igor PLAKSIN Charles S. COFFEY
ADAI/LEDAP-Association for Development of Industrial Aerodynamics & Lab of Energetics and Detonics University of Coimbra, PORTUGAL
国际会议
西安
英文
259-272
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）