Experimental investigation of the damping enhancement in fiber-reinforced composites with carbon nanotubes |
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| Affiliation: | 1. Dipartimento di Architettura, University of Roma Tre, 00181 Rome, Italy;2. Department of Engineering, University of Roma Tre, 00146 Rome, Italy;3. Dipartimento di Ingegneria Strutturale e Geotecnica, Sapienza University of Rome, 00184 Rome, Italy;1. Advanced Composites Centre for Science and Innovation (ACCIS), Department of Aerospace Engineering, University of Bristol, Queen’s Building, Bristol BS8 1TR, United Kingdom;2. Centre for Nanoscience and Quantum Information (NSQI), Tyndall Avenue, Bristol BS8 1FD, United Kingdom;3. Institute for Composites Science and Innovation (InCSI), College of Materials Science and Engineering, Zhejiang University, Hangzhou, PR China;1. Institute of Polymer Engineering, FHNW University of Applied Sciences and Arts Northwestern Switzerland, CH-5210, Windisch, Switzerland;2. Bcomp AG, CH-1700, Fribourg, Switzerland;3. Complex Materials, Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland;1. Department of Industrial Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;2. Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy;1. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310007, PR China;2. AVIC Beijing Institute of Aeronautical Materials, Beijing 100095, PR China;3. Special Aerospace Materials and Technology Research Institute, Beijing 100074, PR China |
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| Abstract: | This study experimentally investigates the damping effects of carbon nanotubes (CNTs) embedded in the matrix of fiber-reinforced composite materials. Several different aspect ratios, types, and weight fractions of CNTs are considered, and an analysis of the CNT dispersion in the composite matrix is presented. The composite materials are analyzed using dynamic mechanical analysis and various modal analysis techniques to determine the damping characteristics of the composite as a function of strain, fiber volume fraction, and nanotube type and weight percentage loading. Experiments are conducted using cantilevered beams in both a stationary and rotating frame in order to explore the effects of rotation on the damping behavior of the composite material. The results show that the addition of two weight percent of CNTs to the matrix of carbon fiber reinforced composites can increase the damping in a stationary composite beam by more than 130% and by more than 150% in a composite beam rotating at 500 RPM. |
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