ANALYTICAL MODELLING OF THE PERFORATION OF ALUMINIUM TARGETS BY FLAT-ENDED PROJECTILES

摘要

A wide range of target thicknesses of 5083 aluminium were impacted by flat-ended projectiles at velocities between 100 and 700 ms~(-1). Comparisons of ballistic limit predictions were made between a simple plasticity based model that treated the initial stage of perforation as an indentation process and an alternate but more complex analytical model which treated the initial stage of perforation as that of compression and plug acceleration. Metallographic sectioning also gave further insight into plug formation and measurements of the heights of the ejected plugs were compared to the predictions of both models, with the plasticity based model again giving excellent predictions. Overall, the work showed that the plasticity-based modelling technique is surprisingly accurate for both ballistic limit and plug height predictions.