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Please use this identifier to cite or link to this item: http://dspace.lib.cranfield.ac.uk/handle/1826/1979

Document Type: Conference paper
Title: An experimental approach to quantify strain transfer efficiency of fibre bragg grating sensors to host structures
Authors: Wei, C. Y.
Ye, Chen-Chun
James, Stephen W.
Tatam, Ralph P.
Irving, Phil E.
Issue Date: 2001
Citation: C. Y. Wei, C. C. Ye, S. W. James, R. P. Tatam and P. E. Irving, An experimental approach to quantify strain transfer efficiency of fibre Bragg grating sensors to host structures, The 13th International Conference on Composite Materials ICCM-13, Beijing, China, June 25-29, 2001.
Abstract: This paper developed a method to evaluate the strain transfer efficiency of fibre Bragg grating sensors to host structures. Various coatings were applied to fibre Bragg grating sensors after being fabricated. They were epoxy, silane agent and polypropylene, representing different surface properties. A neat epoxy resin plate was used as the host in which the coated fibre sensors were embedded in the central layer. The tensile strain output from the FBGs was compared with that obtained from electrical strain gauges which were attached on the surface of the specimen. A calculating method based on the measured strains was developed to quantify the strain transfer function of different surface coatings. The strain transfer coefficient obtained from the proposed method provided a direct indicator to evaluate the strain transfer efficiency of different coatings used on the FBG sensors, under either short or long-term loading. The results demonstrated that the fibre sensor without any coating possessed the best strain transfer, whereas, the worst strain transfer was created by polypropylene coating. Coatings play a most influential role in strain measurements using FBG sensors.
URI: http://dspace.lib.cranfield.ac.uk/handle/1826/1979
Appears in Collections:Staff publications - School of Engineering

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