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Damage visualization and deformation measurement in glass laminates during projectile penetration

: Straßburger, Elmar; Bauer, Steffen; Popko, Gregor

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 ()

Transparent armor consists of glass-polymer laminates in most cases. The formation and propagation of damage in the different glass layers has a strong influence on the ballistic resistance of such laminates. In order to clarify the course of events during projectile penetration, an experimental technique was developed, which allows visualizing the onset and propagation of damage in each single layer of the laminate. Damage evolution was recorded during penetration of 7.62 mm AP projectiles with tungsten carbide core and a total mass of 11.1 g in the impact velocity range from 800 to 880 m/s. In order to measure the deformation of single glass plates within the laminates Photonic Doppler Velocimetry (PDV) was applied. The analysis of the experimental data was supported by numerical simulations, using the AUTODYN commercial hydro-code.