Flight simulation fatigue crack propagation in metal/carbon-epoxy laminates
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Abstract
Flight simulation fatigue crack propagation tests with gust spectrum loading were carried out on laminates of (i) aluminium alloy 2024-T3/carbon-epoxy, (ii) aluminium alloy 7475-T761/carbon-epoxy and (iii) titanium alloy Ti-6Al-4V/carbon-epoxy with nominal weight savings of 30% and 40% as compared to equivalent 2024-T3 Alclad and 7475-T761 panels. The performance of the 2024-T3/carbon-epoxy laminates was much superior to that of the other material combinations, and is very encouraging for the practical achievement of significant weight savings.