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Aiming at quantifying the deceleration of shaped charge jet particles in air at large stand-offs

: Früh, Patrick; Heine, Andreas

Ames, R. ; National Defense Industrial Association -NDIA-; International Ballistics Society -IBS-:
28th International Symposium on Ballistics 2014. Proceedings. Vol.2: Terminal Ballistics, Vulnerability & Survivability : Atlanta, Georgia, September 22-26, 2014
Lancaster, Pa.: DEStech Publications, 2014
ISBN: 978-1-60595-149-2
International Symposium on Ballistics <28, 2014, Atlanta/Ga.>
Fraunhofer EMI ()

Three experiments with two types of small-scale laboratory shaped charges (SC) were done and analyzed based on the assumption that parameters which influence the deceleration of SC particles in air at large stand-offs (SO), e.g. the drag coefficient cD, can be expressed as an average deceleration coefficient. Two velocity-distance data pairs for each particle were gathered by means of flash X-rays at intermediate SO and by high-speed video cameras at large SO. From those data, average deceleration coefficients were calculated. The values mainly ranged from 17-88 km-1, respectively 3-25 km-1, for the two different SC types. The results were in agreement with estimates based on the aerodynamic properties of basic shaped bodies. With the method and results, safety ranges or residual penetration performance of SC particles at large SO can be estimated in laboratory tests.