Abstract
Experiments with fragment-simulating projectiles (FSP) and aluminum plates are conducted to evaluate the performance of various aluminum alloys and plate thicknesses to resist perforation against fragments. Ballistic-limit velocity data for several aluminum alloys and plate thicknesses are presented in several US Army Research Laboratory (ARL) reports. In this study, we present additional ballistic-limit data for plates thinner than the plates reported by ARL. In addition, we present an equation that predicts the ballistic-limit velocity for fragment-simulating projectiles (FSP) that perforate aluminum armor plates. The ballistic-limit equation is presented in terms of dimensionless parameters so that the geometric and material problem scales are identified. Predictions and data from two different fragment-simulating projectiles and two different strength aluminum alloys show the range of plate thicknesses for reasonable model predictions.
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