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Materials 2017, 10(6), 637; doi:10.3390/ma10060637

Analysis of the Light Transmission Ability of Reinforcing Glass Fibers Used in Polymer Composites

1
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
2
Department of Atomic Physics, Faculty of Natural Sciences, Budapest University of Technology and Economics, Budafoki út. 8, H-1111 Budapest, Hungary
3
MTA–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, H-1111 Budapest, Hungary
*
Author to whom correspondence should be addressed.
Received: 18 May 2017 / Revised: 8 June 2017 / Accepted: 8 June 2017 / Published: 10 June 2017
(This article belongs to the Section Advanced Composites)
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Abstract

This goal of our research was to show that E-glass fiber bundles used for reinforcing composites can be enabled to transmit light in a common resin without any special preparation (without removing the sizing). The power of the transmitted light was measured and the attenuation coefficient, which characterizes the fiber bundle, was determined. Although the attenuation coefficient depends on temperature and the wavelength of the light, it is independent of the power of incident light, the quality of coupling, and the length of the specimen. The refractive index of commercially available transparent resins was measured and it was proved that a resin with a refractive index lower than that of the fiber can be used to make a composite whose fibers are capable of transmitting light. The effects of temperature, compression of the fibers, and the shape of fiber ends on the power of transmitted light were examined. The measurement of emitted light can provide information about the health of the fibers. This can be the basis of a simple health monitoring system in the case of general-purpose composite structures. View Full-Text
Keywords: reinforcing glass fiber; light transmission; sensor; structural health monitoring; attenuation coefficient; polymer resins; refractive index reinforcing glass fiber; light transmission; sensor; structural health monitoring; attenuation coefficient; polymer resins; refractive index
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hegedűs, G.; Sarkadi, T.; Czigány, T. Analysis of the Light Transmission Ability of Reinforcing Glass Fibers Used in Polymer Composites. Materials 2017, 10, 637.

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