Study on effect of impact loading on sandwich plate with corrugated cores

Abstract

Application of aluminium alloys are increased in lightweight protective structures subjected to impact loading due to its low density and other useful properties. Extruded aluminium panels extend their application in many fields, with impacts and other types of high-speed loading conditions, like offshore platforms, bridge decks, train and ship components and lightweight protection systems. The present study reveals that the mechanisms of hardened steel projectile penetration of aluminum alloy sandwich panels with empty, triangular corrugated cores have been analytically investigated. A mathematical model developed based on cavity expansion theory for sandwich plate with triangular corrugated core and the results were compared with the published data values. The results showed close values with the numerical results. For highest penetration resistance with reduced areal density, variations of different geometrical parameters of corrugated structures on residual velocity parameters were analyzed. The penetration resistance increases
with increase in parameters of web thickness, web angle, core thickness and plate thickness