Experimental investigation of strength of curved beam by thin ply non-crimp fabric laminates
Arca, Miray A. and Papila, Melih and Çöker, Demirkan (2016) Experimental investigation of strength of curved beam by thin ply non-crimp fabric laminates. In: Zehnder, Alan T. and Carroll, Jay and Hazeli, Kavan and Berke, Ryan B. and Pataky, Garrett and Cavalli, Matthew and Beese, Alison M. and Xia, Shuman, (eds.) Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, 8. Springer, Switzerland, pp. 37-42. ISBN 978-3-319-42194-0 (Print) 978-3-319-42195-7 (Online)
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Official URL: http://dx.doi.org/10.1007/978-3-319-42195-7_6
Resistance against delamination failure and through the thickness tensile properties of curved carbon fiber reinforced plastics composites are investigated experimentally by conducting the curved beam strength tests. Effect of novel material thin ply non crimp fabric (NCF) architecture on delamination resistance of carbon fiber reinforced composites are investigated and compare with that of standard UD layups. In order to determine through the thickness tensile properties of curved carbon fiber composites, standard test method is carried out, namely four-point bending tests. The dynamic delamination propagation and failure sequences under curved beam bending is captured using Photron#Fastcam SA5 ultra high speed system. For the non-crimp fabric configuration an increase in the curved beam strength is observed in comparison with  and [0/45/-45/0] laminates by unidirectional (UD) tape material. For the UD tape, the initial defects caused by the out-of-autoclave manufacturing process is found to be the potential failure sites. The test results and observations suggest that thin-ply NCF is much less vulnerable to the existence of manufacturing voids in contrast to standard thickness UD tape. Finally, TPNCF is shown to have superior properties in regard to delamination resistance and curved-beam strength.
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