Study of strain-transfer of FBG sensors embedded in unidirectional composites

G. Pereira; C. Frias; H. Faria; O. Frazão; A.T. Marques

doi:10.1016/j.polymertesting.2013.05.006

Study of strain-transfer of FBG sensors embedded in unidirectional composites

G. Pereira, C. Frias, H. Faria, O. Frazão, A.T. Marques

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements in composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often leads to inaccurate results.This work is a continuation of a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors [1]. A new combination of the pair host material/sensor was studied and characterized. Test specimens were manufactured with longitudinally embedded FBG sensors, using a glass/epoxy prepreg system, in order to compare with a carbon/epoxy prepreg system. The combined behaviour of the sensors and the host material was characterized and a procedure to obtain a more accurate strain was defined for this new chosen material.

Original language	English
Journal	Polymer Testing
Volume	32
Issue number	6
Pages (from-to)	1006-1010
ISSN	0142-9418
DOIs	https://doi.org/10.1016/j.polymertesting.2013.05.006
Publication status	Published - 2013
Externally published	Yes

Keywords

Smart materials
Optical fibre Bragg grating sensors
Nondestructive testing
Structural health monitoring

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10.1016/j.polymertesting.2013.05.006

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title = "Study of strain-transfer of FBG sensors embedded in unidirectional composites",

abstract = "Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements in composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often leads to inaccurate results.This work is a continuation of a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors [1]. A new combination of the pair host material/sensor was studied and characterized. Test specimens were manufactured with longitudinally embedded FBG sensors, using a glass/epoxy prepreg system, in order to compare with a carbon/epoxy prepreg system. The combined behaviour of the sensors and the host material was characterized and a procedure to obtain a more accurate strain was defined for this new chosen material.",

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doi = "10.1016/j.polymertesting.2013.05.006",

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AU - Pereira, G.

AU - Frias, C.

AU - Faria, H.

AU - Frazão, O.

AU - Marques, A.T.

PY - 2013

Y1 - 2013

N2 - Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements in composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often leads to inaccurate results.This work is a continuation of a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors [1]. A new combination of the pair host material/sensor was studied and characterized. Test specimens were manufactured with longitudinally embedded FBG sensors, using a glass/epoxy prepreg system, in order to compare with a carbon/epoxy prepreg system. The combined behaviour of the sensors and the host material was characterized and a procedure to obtain a more accurate strain was defined for this new chosen material.

AB - Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements in composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often leads to inaccurate results.This work is a continuation of a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors [1]. A new combination of the pair host material/sensor was studied and characterized. Test specimens were manufactured with longitudinally embedded FBG sensors, using a glass/epoxy prepreg system, in order to compare with a carbon/epoxy prepreg system. The combined behaviour of the sensors and the host material was characterized and a procedure to obtain a more accurate strain was defined for this new chosen material.

KW - Smart materials

KW - Optical fibre Bragg grating sensors

KW - Nondestructive testing

KW - Structural health monitoring

U2 - 10.1016/j.polymertesting.2013.05.006

DO - 10.1016/j.polymertesting.2013.05.006

M3 - Journal article

SN - 0142-9418

VL - 32

SP - 1006

EP - 1010

JO - Polymer Testing

JF - Polymer Testing

IS - 6

ER -

Study of strain-transfer of FBG sensors embedded in unidirectional composites

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Keywords

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