Tensile properties and failure mechanisms of 3D woven GRP composites |
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| Affiliation: | 1. Defence Science and Technology Organisation, Aeronautical and Maritime Research Laboratory, PO Box 4331, Melbourne, Victoria, 3001, Australia;2. Cooperative Research Centre for Advanced Composite Structures Limited, 506 Lorimer Street, Fishermens Bend, Victoria, 3207, Australia;1. Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China;2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China;1. Université de Haute Alsace, Laboratoire de Physique et Mécanique Textiles, F-68200 Mulhouse, France;2. SAFRAN Aircraft Engines, F-77550 Moissy Cramayel, France;3. SAFRANTECH/SAFRAN Composites, F-91760 Itteville, France;1. North Carolina State University, 911 Oval Drive, Raleigh, NC 27695, USA;2. Composite Structures Laboratory, Department of Aerospace Engineering, University of Michigan, 1320 Beal Street, Ann Arbor, MI 48109-2140, USA;3. Army Research Laboratory, Aberdeen Proving Ground, MD 21005-5069, USA |
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| Abstract: | Tensile tests were performed on glass reinforced polymer (GRP) composites with three-dimensional (3D) orthogonal, normal layered interlock, and offset layered interlock woven fibre architectures. The mechanical properties and failure mechanisms under tensile loading were similar for the three composites. Cracks formed at low strains within the resin-rich channels between the fibre tows and around the through-thickness binder yarns in the composites, although this damage did not alter the tensile properties. At higher applied tensile stresses the elastic modulus was reduced by 20–30% due to inelastic tow straightening and cracking around the most heavily crimped in-plane tows. Further softening occurred at higher strains by inelastic straightening of all the tows. Composite failure occurred within a localised region and the discrete tow rupture events that have caused tow lock-up and pullout mechanisms in other 3D woven composites were not observed. |
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