Research Papers

The Potential of FOX-7 Explosive in Insensitive Munition Design

[+] Author and Article Information
Ian G. Cullis, Richard Townsley

 QinetiQ, Building Q27, QinetiQ, Fort Halstead, Sevenoaks Kent, TN14 7BP, UK

J. Appl. Mech 78(5), 051012 (Aug 05, 2011) (8 pages) doi:10.1115/1.4004282 History: Received November 23, 2010; Revised May 23, 2011; Published August 05, 2011; Online August 05, 2011

This paper describes research into the suitability of the explosive FOX-7 in the development of insensitive munitions. The analysis of experimental cylinder test data to generate a JWL equation of state and Gurney energy is described and the results compared with other published data. The JWL and Gurney energy are then used in analytical and hydrocode simulations to assess FOX-7 performance in fragmenting and slow stretching jet warheads and compared against other high performance explosives. The results of experiments to validate the simulations are presented and discussed.

Copyright © 2011 by American Society of Mechanical Engineers
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Figure 1

Velocity of Detonation (VOD) measurement for test 1

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Figure 2

Cylinder wall expansion time history for test 1

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Figure 3

Cylinder wall expansion for CHEETAH QRX080 JWL

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Figure 4

Cylinder wall velocity for CHEETAH JWL

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Figure 5

Reference function Delta t for CHEETAH JWL

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Figure 6

Cylinder wall expansion for Trzcinski (100% FOX-7) JWL

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Figure 7

Cylinder wall expansion for Karlsson (98.5% FOX-7) JWL

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Figure 8

Reference function Delta t for the QRX080, Karlsson and Trzcinski JWLs

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Figure 9

Fragmentation sub-munition and Split-X® predicted fragment velocities

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Figure 10

Slow Stretching Jet charge design

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Figure 11

Pseudoradiograph predictions for different fillings; actual radiographs shown on left for LX-14 and EDC1 filled 75 mm diameter charges

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Figure 12

Experimental trails arrangement

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Figure 13

Radiographs showing jet development for PBXN-110 filling

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Figure 14

Jet development for the QRX250 filling

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Figure 15

Comparison of jets produced by PBXN-110 and QRX250 (FOX-7) at 270 μs




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