Abstract
The impact resistance of aluminum alloy circular corrugated sandwich plate is investigated by using the experiments and simulations, and the influence of projectile nose shape and impact velocity on the failure mode and energy dissipation characteristics is analyzed. The experimental results indicate that the projectile nose shape influences the impact resistance of circular corrugated sandwich plates. The ballistic limit velocity (BLV) and energy dissipation of the plate increase as the caliber radius head (CRH) of the projectile increases, and the failure mode gradually changes from shear plugging damage and tensile tearing damage to ductile hole enlargement and petal cracking damage. Numerical simulation results show that the numerical simulation can accurately predict the ballistic limit velocity, failure mode and the impact process.
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