Buckling of hybrid nanocomposites with embedded graphene and carbon nanotubes |
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| Affiliation: | 1. Zienkiewicz Centre for Computational Engineering, Swansea University, Swansea SA1 8EN, UK;2. Departamento de Ingeniería en Obras Civiles, Universidad de Santiago de Chile, Av. Ecuador 3659, Estación Central, Santiago, Chile;3. Advanced Composites Centre for Innovation and Science, University of Bristol, Bristol BS8 1TR, UK;1. Centro de Investigación en Materiales Avanzados, S.C. (CIMAV), Chihuahua/Monterrey, 120 Avenida Miguel de Cervantes, 31109 Chihuahua, Mexico;2. Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV) Querétaro, Libramiento Norponiente 2000, Fracc. Real de Juriquilla, 76230 Querétaro, Mexico;3. Chernivtsi National University, Kotsyubynsky Str. 2, 58012 Chernivtsi, Ukraine;1. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Kraków, Poland;2. AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, al. Mickiewicza 30, Kraków, Poland;1. Instituto de Física, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia;2. Instituto de Física, Universidade Federal de Alagoas, Maceió-AL 57072-970, Brazil;3. Instituto de Física, Universidade Estadual de Campinas - Unicamp, Campinas - SP 13083-859, Brazil;1. School of Science, Chang''an University, Xi''an 710064, China;2. School of Aeronautics, Northwestern Polytechnical University, Xi''an 710072, China |
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| Abstract: | With the aid of atomistic multiscale modelling and analytical approaches, buckling strength has been determined for carbon nanofibres/epoxy composite systems. Various nanofibres configurations considered are single walled carbon nano tube (SWCNT) and single layer graphene sheet (SLGS) and SLGS/SWCNT hybrid systems. Computationally, both eigen-value and non-linear large deformation-based methods have been employed to calculate the buckling strength. The non-linear computational model generated here takes into account of complex features such as debonding between polymer and filler (delamination under compression), nonlinearity in the polymer, strain-based damage criteria for the matrix, contact between fillers and interlocking of distorted filler surfaces with polymer. The effect of bridging nanofibres with an interlinking compound on the buckling strength of nano-composites has also been presented here. Computed enhancement in buckling strength of the polymer system due to nano reinforcement is found to be in the range of experimental and molecular dynamics based results available in open literature. The findings of this work indicate that carbon based nanofillers enhance the buckling strength of host polymers through various local failure mechanisms. |
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| Keywords: | Graphene sheets Carbon nano tubes (CNT) Hybrid nano-composites Atomistic model Graphene CNT-based composites |
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