Testing Explosive Materials for Sensitivity to Mechanical Impact by the Shell Fracture Method

This paper describes an approximate theoretical analysis of a new method for testing explosive materials for sensitivity to mechanical impact, which is known as the shell fracture method. In this nonimpact method, the shell fracture releases the solid explosive material contained in it from the comp...

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Bibliographic Details
Published in:Combustion, explosion, and shock waves explosion, and shock waves, 2022-02, Vol.58 (1), p.114-120
Main Author: Dubovik, A. V.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Classical Mechanics
Compressive properties
Control
Dynamical Systems
Engineering
Explosions
Explosive compacting
Explosive impact tests
Physical Chemistry
Physics
Physics and Astronomy
Radial flow
Test procedures
Vibration
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Summary:This paper describes an approximate theoretical analysis of a new method for testing explosive materials for sensitivity to mechanical impact, which is known as the shell fracture method. In this nonimpact method, the shell fracture releases the solid explosive material contained in it from the compressive load and allows it to free lateral expansion. During a high-velocity flow, the substance explodes if the created compressive stress is sufficiently strong. The explosion pattern as a whole seems to be similar to the phenomenon of initiating an explosion in the case where a charge of a solid explosive material is destroyed by an impact on a pile driver. Therefore, the test procedure under consideration is often mathematically described partially by the previously developed model of the radial flow of a viscoplastic explosive material, its dissipative heating, and thermal ignition in the hot spots of the fluid. The data obtained on various parameters changing during the initiation of an explosion allow one to visualize its course not only within the framework of the method considered, but also to generalize them to explosion-like processes in many materials that are suddenly released from a high load.
ISSN:0010-5082
1573-8345
DOI:10.1134/S0010508222010129