Mechanical properties of graphene nanoplatelet/carbon fiber/epoxy hybrid composites: Multiscale modeling and experiments |
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| Affiliation: | 1. Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA;2. NASA Glenn Research Center, 21000 Brookpark Rd, Cleveland, OH, 44135, USA;1. Mechanical Engineering Department, Motilal Nehru National Institute of Technology Allahabad, Uttar Pradesh 211004, India;2. Mechanical Engineering Department, GLA University, Mathura, Uttar Pradesh, India;3. Department of Mechanical Engineering Technology, University of Johannesburg, Johannesburg, South Africa;1. Department of Aerospace Engineering and Mechanics, University of Alabama, Tuscaloosa, AL 35487-0280, USA;2. Department of Chemical Engineering, Michigan Technological University, Houghton, MI 49931-1295, USA;3. Department of Mechanical Engineering, Michigan Technological University, Houghton, MI 49931-1295, USA;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;2. Department of Engineering Mechanics, College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;3. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;4. Department of Mechanical Engineering, Chiba University, Chiba City 263-8522, Japan;5. Department of Nanomechanics, Tohoku University, Sendai 980-8579, Japan |
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| Abstract: | Because of the relatively high specific mechanical properties of carbon fiber/epoxy composite materials, they are often used as structural components in aerospace applications. Graphene nanoplatelets (GNPs) can be added to the epoxy matrix to improve the overall mechanical properties of the composite. The resulting GNP/carbon fiber/epoxy hybrid composites have been studied using multiscale modeling to determine the influence of GNP volume fraction, epoxy crosslink density, and GNP dispersion on the mechanical performance. The hierarchical multiscale modeling approach developed herein includes Molecular Dynamics (MD) and micromechanical modeling, and it is validated with experimental testing of the same hybrid composite material system. The results indicate that the multiscale modeling approach is accurate and provides physical insight into the composite mechanical behavior. Also, the results quantify the substantial impact of GNP volume fraction and dispersion on the transverse mechanical properties of the hybrid composite while the effect on the axial properties is shown to be insignificant. |
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