Fatigue behaviour of glass fibre reinforced epoxy composites enhanced with nanoparticles |
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| Affiliation: | 1. CEMUC, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal;2. Instituto Politécnico de Coimbra, ISEC, Department of Mechanical Engineering, Rua Pedro Nunes, 3030-199 Coimbra, Portugal;3. University of Coimbra, Department of Mechanical Engineering, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal;4. Polytechnic Institute of Viseu, ESTG, Department of Mechanical Engineering, Campus Politécnico, 3510 Viseu, Portugal;1. Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran;2. School of Chemical Engineering, Shandong University of Technology, 255049 Zibo, Shandong, PR China;1. Milliken Pipe Wrap, Houston, TX 77060, USA;2. Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX 77204, USA;3. Texas Center for Superconductivity, University of Houston, TX 77204, USA;4. DCD Consulting, LLC, League City, TX 77573, USA;1. Politecnico di Torino, Dipartimento di Ingegneria Meccanica ed Aerospaziale, Corso Duca degli Abruzzi, 24-10129 Torino, Italy;2. Michigan State University, Composite Vehicle Research Center, 2727 Alliance Drive, Lansing, MI 48910, USA |
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| Abstract: | Nanoparticle reinforcement of the matrix in laminates has been recently explored to improve mechanical properties, particularly the interlaminar strength. This study analyses the fatigue behaviour of nanoclay and multiwalled carbon nanotubes enhanced glass/epoxy laminates. The matrix used was the epoxy resin Biresin® CR120, combined with the hardener CH120-3. Multiwalled carbon nanotubes (MWCNTs) 98% and organo-montmorillonite Nanomer I30 E nanoclay were used. Composites plates were manufactured by moulding in vacuum. Fatigue tests were performed under constant amplitude, both under tension–tension and three points bending loadings. The fatigue results show that composites with small amounts of nanoparticles addition into the matrix have bending fatigue strength similar to the obtained for the neat glass fibre reinforced epoxy matrix composite. On the contrary, for higher percentages of nanoclays or carbon nanotubes addition the fatigue strength tend to decrease caused by poor nanoparticles dispersion and formation of agglomerates. Tensile fatigue strength is only marginally affected by the addition of small amount of particles. The fatigue ratio in tension–tension loading increases with the addition of nanoclays and multi-walled carbon nanotubes, suggesting that both nanoparticles can act as barriers to fatigue crack propagation. |
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| Keywords: | A Glass fibres A Particle-reinforcement A Nano-structures B Fatigue Nanocomposites |
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