Embedded fibre Bragg grating sensors in advanced composite materials

K. S.C. Kuang; R. Kenny; M. P. Whelan; W. J. Cantwell; P. R. Chalker

doi:10.1016/S0266-3538(01)00037-9

Embedded fibre Bragg grating sensors in advanced composite materials

K. S.C. Kuang, R. Kenny, M. P. Whelan, W. J. Cantwell, P. R. Chalker

Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

240 Scopus citations

Abstract

Fibre Bragg grating (FBG) sensors have been embedded in a number of advanced composite materials and fibre/metal laminates (FMLs). The post-fabrication FBG spectra were studied to examine the influence of manufacturing variables (such as composite stacking sequence and resin flow during processing) on the final profile of the spectrum and the functionality of the FBG sensor. Distortion and broadening of the width of the FBG spectra were observed in several of the specimens. As a result of a strong non-uniformity of the strain field caused by local asymmetric loading of the sensor, pronounced splitting of the spectra into multiple peaks was noted for FBG sensors embedded in angle-ply configurations. In contrast, the FBG spectra for the unidirectional specimens exhibited a single well-defined peak. Tensile tests carried out on these specimens showed excellent linearity within the test regime. However, for specimens exhibiting a multi-peak spectrum, it was observed that these specimens showed a tendency to produce strain anomalies during the loading event.

Original language	British English
Pages (from-to)	1379-1387
Number of pages	9
Journal	Composites Science and Technology
Volume	61
Issue number	10
DOIs	https://doi.org/10.1016/S0266-3538(01)00037-9
State	Published - Aug 2001

Keywords

A. Layered structures
C. Laminates
Fibre Bragg gratings

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title = "Embedded fibre Bragg grating sensors in advanced composite materials",

abstract = "Fibre Bragg grating (FBG) sensors have been embedded in a number of advanced composite materials and fibre/metal laminates (FMLs). The post-fabrication FBG spectra were studied to examine the influence of manufacturing variables (such as composite stacking sequence and resin flow during processing) on the final profile of the spectrum and the functionality of the FBG sensor. Distortion and broadening of the width of the FBG spectra were observed in several of the specimens. As a result of a strong non-uniformity of the strain field caused by local asymmetric loading of the sensor, pronounced splitting of the spectra into multiple peaks was noted for FBG sensors embedded in angle-ply configurations. In contrast, the FBG spectra for the unidirectional specimens exhibited a single well-defined peak. Tensile tests carried out on these specimens showed excellent linearity within the test regime. However, for specimens exhibiting a multi-peak spectrum, it was observed that these specimens showed a tendency to produce strain anomalies during the loading event.",

keywords = "A. Layered structures, C. Laminates, Fibre Bragg gratings",

author = "Kuang, {K. S.C.} and R. Kenny and Whelan, {M. P.} and Cantwell, {W. J.} and Chalker, {P. R.}",

note = "Funding Information: This work was carried out at the European Commission Joint Research Centre, Ispra, Italy. The first author is grateful to the Council of Vice Chancellors and Principals (now Universities UK) for supporting this work through an Overseas Research Scheme award. A financial contribution from the Institute of Materials in the form of a travel grant is received with gratitude",

year = "2001",

month = aug,

doi = "10.1016/S0266-3538(01)00037-9",

language = "British English",

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AU - Kuang, K. S.C.

AU - Kenny, R.

AU - Whelan, M. P.

AU - Cantwell, W. J.

AU - Chalker, P. R.

N1 - Funding Information: This work was carried out at the European Commission Joint Research Centre, Ispra, Italy. The first author is grateful to the Council of Vice Chancellors and Principals (now Universities UK) for supporting this work through an Overseas Research Scheme award. A financial contribution from the Institute of Materials in the form of a travel grant is received with gratitude

PY - 2001/8

Y1 - 2001/8

N2 - Fibre Bragg grating (FBG) sensors have been embedded in a number of advanced composite materials and fibre/metal laminates (FMLs). The post-fabrication FBG spectra were studied to examine the influence of manufacturing variables (such as composite stacking sequence and resin flow during processing) on the final profile of the spectrum and the functionality of the FBG sensor. Distortion and broadening of the width of the FBG spectra were observed in several of the specimens. As a result of a strong non-uniformity of the strain field caused by local asymmetric loading of the sensor, pronounced splitting of the spectra into multiple peaks was noted for FBG sensors embedded in angle-ply configurations. In contrast, the FBG spectra for the unidirectional specimens exhibited a single well-defined peak. Tensile tests carried out on these specimens showed excellent linearity within the test regime. However, for specimens exhibiting a multi-peak spectrum, it was observed that these specimens showed a tendency to produce strain anomalies during the loading event.

AB - Fibre Bragg grating (FBG) sensors have been embedded in a number of advanced composite materials and fibre/metal laminates (FMLs). The post-fabrication FBG spectra were studied to examine the influence of manufacturing variables (such as composite stacking sequence and resin flow during processing) on the final profile of the spectrum and the functionality of the FBG sensor. Distortion and broadening of the width of the FBG spectra were observed in several of the specimens. As a result of a strong non-uniformity of the strain field caused by local asymmetric loading of the sensor, pronounced splitting of the spectra into multiple peaks was noted for FBG sensors embedded in angle-ply configurations. In contrast, the FBG spectra for the unidirectional specimens exhibited a single well-defined peak. Tensile tests carried out on these specimens showed excellent linearity within the test regime. However, for specimens exhibiting a multi-peak spectrum, it was observed that these specimens showed a tendency to produce strain anomalies during the loading event.

KW - A. Layered structures

KW - C. Laminates

KW - Fibre Bragg gratings

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SP - 1379

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JO - Composites Science and Technology

JF - Composites Science and Technology

IS - 10

ER -

Embedded fibre Bragg grating sensors in advanced composite materials

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