Processing,characterization, and modeling of carbon nanotube-reinforced multiscale composites |
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| Authors: | Myungsoo Kim Young-Bin Park Okenwa I Okoli Chuck Zhang |
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| Affiliation: | 1. Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical & Manufacturing Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia;2. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK;3. Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, VIC 3220, Australia;1. School of Statistics and Applied Mathematics, Anhui University of Finance and Economics, Bengbu 233030, China;2. Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran;3. Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea;1. Department of Aeronautics and Astronautics, MIT 77 Mass. Ave., Bldg. 35-220, USA;2. Department of Materials & Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel;3. Department of Aeronautics and Astronautics, MIT 77 Mass. Ave., Bldg. 33-408, USA;1. Advanced Composites Centre for Innovation and Science (ACCIS), Aerospace Engineering, University of Bristol, Bristol BS8 1TR, UK;2. Bristol Centre for Nanoscience and Quantum Information (NSQI), University of Bristol, Tyndall Avenue, Bristol BS8 1FD, UK;3. Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, UK;4. EADS Innovation Works, Building 20A1, Golf Course Lane, Filton, Bristol BS99 7AR, UK |
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| Abstract: | Carbon fiber-reinforced epoxy composites modified with carbon nanotubes (CNTs) were fabricated and characterized. High-energy sonication was used to disperse CNTs in the resin, followed by infiltration of fiber preform with the resin/CNT mixture. The effects of sonication time on the mechanical properties of “multiscale” composites, which contain reinforcements at varying scales, were studied. A low CNT loading of 0.3 wt% in resin had little influence on tensile properties, while it improved the flexural modulus, strength, and percent strain to break by 11.6%, 18.0%, and 11.4%, respectively, as compared to the control carbon fiber/epoxy composite. While sonication is an effective method to disperse CNTs in a resin, duration, intensity, and temperature need to be controlled to prevent damages imposed on CNTs and premature resin curing. A combination of Halpin–Tsai equations and woven fiber micromechanics was used in hierarchy to predict the mechanical properties of multiscale composites, and the discrepancies between the predicted and experimental values are explained. |
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