Ubiquitiform Hotspot Ignition Model of PBX for Shock Initiation

In this study, a ubiquitiform hotspot ignition model with cross‐scale characteristics is proposed to describe the ignition stage of PBX, which can account for heterogeneous effects. Firstly, a ubiquitiform model of hotspot intensity is obtained. The model can describe the hotspot information after P...

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Bibliographic Details
Published in:Propellants, explosives, pyrotechnics explosives, pyrotechnics, 2021-10, Vol.46 (10), p.1561-1571
Main Authors: Liu, Chun, Ou, Zhuo Cheng, Duan, Zhuo Ping, Huang, Feng Lei
Format: Article
Language:English
Subjects:
Distribution functions
Energetic Material
Hotspot
Ignition
Ignition Reaction Rate
Nested Ubiquitiform Model
Rate constants
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Summary:In this study, a ubiquitiform hotspot ignition model with cross‐scale characteristics is proposed to describe the ignition stage of PBX, which can account for heterogeneous effects. Firstly, a ubiquitiform model of hotspot intensity is obtained. The model can describe the hotspot information after PBX is impacted. In which, a hotspot distribution model based on the nested ubiquitiform model of explosives is used to characterize geometric properties of hotspot, including the size and location of hotspot; and the Weibull statistical distribution function is used to describe the distribution of hotspot intensity. Then, combining the ubiquitiform model of hotspot intensity with Arrhenius model, the ubiquitiform hotspot ignition model is developed to characterize the ignition stage of PBX. Finally, it is found that the equivalent reaction rate constants calculated by our ignition model are in good agreement with the previous experimental data.
ISSN:0721-3115
1521-4087
DOI:10.1002/prep.202100089