Compressive strength of composite laminates following free edge impact

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Barely Visible Impact Damage (BVID) can occur when laminated composite material is subject to free edge Impact loads in the plane of the laminate and can result in a significant reduction in compressive strength caused by buckle-driven delamination. This paper will report on a semi-analytical fracture mechanics model that predicts the Compression After Impact (CAI) strength of composite laminates subject to in-plane free edge Impact. Compression testing has been undertaken on three impacted coupons in order to validate the theoretical results. Analytical results are shown to be on average within 10% of experimental values for the strain at which propagation of damage occurs.
Original languageEnglish
Pages (from-to)1056-1065
Number of pages10
JournalComposites Part A Applied Science and Manufacturing
Issue number9
Publication statusPublished - Sept 2010
Event10th International Conference on Deformation and Fracture of Composites (DFC-10) - Sheffield, UK United Kingdom
Duration: 15 Apr 200917 Apr 2009


  • free edge impact
  • laminates
  • damage tolerance
  • analytical modelling


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