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Effect of 7.62mm Round Mass and Composite Armor Areal Density on Clay Backface Deformation and Clay Internal Pressure

MATTHEW G. BEVAN, QUANG T. LUONG, VIRGINIA A. HALLS, JAMES Q. ZHENG

Abstract


A series of tests were conducted to measure the backface deformation (BFD) and associated peak pressures in clay due to non-perforating 7.62mm projectile impacts on composite body armor test panels. The range of rounds tested had no significant effect on the clay BFD. However, the different rounds had a statistically significant effect on the peak pressures measured. In contrast, for the range of armor areal densities measured, the areal density had a statistically significant effect on the clay BFD but did not have a statistically significant effect on the peak pressure measured. This difference between clay BFD and internal pressure response suggests that the clay BFD and peak pressure measure different characteristics of the impact event.

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