Abstract
Conventional composites are known for their sensitivity to impact damage. This has slowed their widespread application to thin, damage tolerance-critical primary structures such as fuselage pressure cabin skins. Therefore, impact tests were performed to determine the impact characteristics of Fibre Metal Laminates (GLARE and ARALL). Comparative low and high velocity impact tests were performed on monolithic aluminium, Fibre Metal Laminates, and carbon thermoplastic composites. Additional impact tests were performed on monolithic aluminium and ARALL specimens under tensile loading. The present article characterizes the impact properties of Fibre Metal laminates in comparison with other high-performance aerospace structural materials. The results demonstrate the superior behaviour of GLARE 3 compared with the other materials. The effect of the initial tensile loading on the damage size and the residual strength of ARALL is small for realistic operating stresses ( S < 200 MPa).
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