Projectile Perforation of Multi-Layered Beams
Interim rept. 1977-1978
TECHNION - ISRAEL INST OF TECH HAIFA MATERIAL MECHANICS LAB
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A combined analytical and experimental study has been performed on the ballistic resistance of layered targets, in particular, of flat, relatively thin beam with clamped ends in spaced and laminated i.e., in contact without bonding conditions. The theoretical analysis combines the effect of structural deformation with the mechanism of perforation. This requires a redefinition of the ballistic limit velocity as the initial impact velocity for which the post perforation velocity and the structural deformation velocity of the impact point would be equal at the same time. The ballistic tests were based on commercially pure and alloy 6061-t6 aluminum target specimens of various thicknesses and configurations, and a 0.22 in. caliber projectile which struck the targets perpendicularly at their center with a velocity of 375 ms. The results for the velocity drop show fairly good agreement between experiments and predictions, and greater ballistic resistance of the laminated configuration.
- Metallurgy and Metallography
- Ammunition and Explosives