In situ strain and temperature monitoring of adaptive composite material

An optical fiber sensor is designed to simultaneously measure strain and temperature in an adaptive composite material. The sensor is formed by splicing two fiber Bragg gratings (FBGs) close to each other, which are written in optical fibers with different core dopants and concentrations. Their temperature sensitivities are hence different. The sensor is tested on an adaptive composite laminate made of unidirectional Kevlar-epoxy prepreg plies. Several 150 μm diameter prestrained NiTiCu shape memory alloy (SMA) wires are embedded in the composite laminate together with one fiber sensor. Simultaneous monitoring of strain and temperature during the curing process and activation in an oven is demonstrated


Published in:
Journal of Intelligent Material Systems and Structures, 17, 12, 1059-1067
Year:
2006
Publisher:
SAGE Publications
ISSN:
1045-389X
Keywords:
Note:
Smart Structures & Composites Lab., Korea Inst. of Sci. & Technol., Seoul, South Korea Copyright 2007, The Institution of Engineering and Technology 9374260 1045-389X in situ temperature monitoring in situ strain monitoring adaptive composite materials optical fiber sensor fiber Bragg gratings adaptive composite laminate unidirectional Kevlar-epoxy prepreg plies shape memory alloy wires curing NiTiCu
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 Record created 2012-06-20, last modified 2018-03-18

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