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Compressive strength of composite laminates following free edge impact |
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| Authors: | Andrew T Rhead David Marchant Richard Butler |
| Affiliation: | 1. AMADE, Polytechnic School, University of Girona, M. Aurèlia Capmany 61, 17003 Girona, Spain;2. Mechanical Design and Production Dept., Faculty of Engineering, Zagazig University, P.O. Box 44519, Zagazig, Sharkia, Egypt;1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, PR China;2. Shenyang Aircraft Design and Research Institute, Shenyang 110035, PR China |
| Abstract: | 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. |
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