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.
|Creators||Rhead, A. T., Marchant, D. and Butler, R.|
|Uncontrolled Keywords||free edge impact, laminates, damage tolerance, analytical modelling|
|Departments||Faculty of Engineering & Design > Mechanical Engineering|
|Research Centres||Aerospace Engineering Research Centre|
|Additional Information||10th International Conference on Deformation and Fracture of Composites (DFC-10). 15-17 April 2009. Sheffield, England.|
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