A Statistical Hot Spot Reaction Rate Model for Shock Initiation of PBX

doi:10.3969/j.issn.1000-1093.2021.11.011

Abstract

Abstract: A statistical hot spot reaction rate (SHS) model for shock initiation and detonation of heterogeneous solid explosives is developed to describe the formation，growth or disappearance of hot spots，combustion after nucleation and rapid transition to detonation. The pressure-time histories in both HMX-based PBX9051 and TATB-based LX-17 are calculated by using the SHS model， and the numerical results are found to be in good agreement with the experimental data. It is found that the void size should be controlled as small as possible to improve the safety during the synthesis of insensitive high explosives. The results indicate that the shock initiation behavior of the HMX-based PBX has the accelerated reaction characteristics，and the TATB-based PBX has a stable reaction characteristic.

Key words: polymerbondedexplosive, shokinitiation, statisticalhotspot, reactionratemodel, voidsizedistribution

CLC Number:

O381

BAI Zhiling， DUAN Zhuoping， HUANG Fenglei. A Statistical Hot Spot Reaction Rate Model for Shock Initiation of PBX[J]. Acta Armamentarii, 2021, 42(11): 2379-2387.

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