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Polymer Composites in the Aerospace Industry by Costas Soutis, Phil E

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9

Impact, post-impact strength and post-impact fatigue behaviour of polymer composites

G. Davies1,  and P. Irving2     1Imperial College, London, UK     2Cranfield University, Cranfield, UK

Abstract

The effect of impact on static strength and fatigue durability is reviewed. Impacts are categorised in terms of the impact velocity, impacting mass and impact energy. At low-to-medium velocities, delamination damage develops below the impact site with penetration likely at increased velocities. Under in-plane static compression buckling of impacted laminates reduces compression strength as measured by the compression after impact (CAI) test. Models for the prediction of onset of delamination damage and of the reduction in strength are summarised. The ...

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