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Article: Embedded fibre Bragg grating sensors for non-uniform strain sensing in composite structures

TitleEmbedded fibre Bragg grating sensors for non-uniform strain sensing in composite structures
Authors
KeywordsFibre Bragg Grating (Fbg) Sensors
Non-Uniform Strain
Strain Measurement
Transfer Matrix
Issue Date2005
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/mst
Citation
Measurement Science And Technology, 2005, v. 16 n. 12, p. 2415-2424 How to Cite?
AbstractA methodology for evaluating the response of embedded fibre Bragg grating (FBG) sensors in composite structures based on the strain in a host material is introduced. In applications of embedded FBG sensors as strain sensing devices, it is generally assumed that the strain experienced in a fibre core is the same as the one measured in the host material. The FBG sensor is usually calibrated by a strain gauge through a tensile test, centred on obtaining the relationship between the surface strain in the host material and the corresponding Bragg wavelength shift obtained from the FBG sensor. However, such a calibration result can only be valid for uniform strain measurement. When the strain distribution along a grating is non-uniform, average strain measured by the strain gauge cannot truly reflect the in-fibre strain of the FBG sensor. Indeed, the peak in the reflection spectrum becomes broad, may even split into multiple peaks, in sharp contrast with a single sharp peak found in the case of the uniform strain measurement. In this paper, a strain transfer mechanism of optical fibre embedded composite structure is employed to estimate the non-uniform strain distribution in the fibre core. This in-fibre strain distribution is then utilized to simulate the response of the FBG sensor based on a transfer-matrix formulation. Validation of the proposed method is preceded by comparing the reflection spectra obtained from the simulations with those obtained from experiments. © 2005 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/156796
ISSN
2015 Impact Factor: 1.492
2015 SCImago Journal Rankings: 0.719
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLing, HYen_US
dc.contributor.authorLau, KTen_US
dc.contributor.authorCheng, Len_US
dc.contributor.authorChow, KWen_US
dc.date.accessioned2012-08-08T08:44:00Z-
dc.date.available2012-08-08T08:44:00Z-
dc.date.issued2005en_US
dc.identifier.citationMeasurement Science And Technology, 2005, v. 16 n. 12, p. 2415-2424en_US
dc.identifier.issn0957-0233en_US
dc.identifier.urihttp://hdl.handle.net/10722/156796-
dc.description.abstractA methodology for evaluating the response of embedded fibre Bragg grating (FBG) sensors in composite structures based on the strain in a host material is introduced. In applications of embedded FBG sensors as strain sensing devices, it is generally assumed that the strain experienced in a fibre core is the same as the one measured in the host material. The FBG sensor is usually calibrated by a strain gauge through a tensile test, centred on obtaining the relationship between the surface strain in the host material and the corresponding Bragg wavelength shift obtained from the FBG sensor. However, such a calibration result can only be valid for uniform strain measurement. When the strain distribution along a grating is non-uniform, average strain measured by the strain gauge cannot truly reflect the in-fibre strain of the FBG sensor. Indeed, the peak in the reflection spectrum becomes broad, may even split into multiple peaks, in sharp contrast with a single sharp peak found in the case of the uniform strain measurement. In this paper, a strain transfer mechanism of optical fibre embedded composite structure is employed to estimate the non-uniform strain distribution in the fibre core. This in-fibre strain distribution is then utilized to simulate the response of the FBG sensor based on a transfer-matrix formulation. Validation of the proposed method is preceded by comparing the reflection spectra obtained from the simulations with those obtained from experiments. © 2005 IOP Publishing Ltd.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/msten_US
dc.relation.ispartofMeasurement Science and Technologyen_US
dc.subjectFibre Bragg Grating (Fbg) Sensorsen_US
dc.subjectNon-Uniform Strainen_US
dc.subjectStrain Measurementen_US
dc.subjectTransfer Matrixen_US
dc.titleEmbedded fibre Bragg grating sensors for non-uniform strain sensing in composite structuresen_US
dc.typeArticleen_US
dc.identifier.emailChow, KW:kwchow@hku.hken_US
dc.identifier.authorityChow, KW=rp00112en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0957-0233/16/12/003en_US
dc.identifier.scopuseid_2-s2.0-27844599615en_US
dc.identifier.hkuros110799-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-27844599615&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue12en_US
dc.identifier.spage2415en_US
dc.identifier.epage2424en_US
dc.identifier.isiWOS:000234035500005-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLing, HY=7202062693en_US
dc.identifier.scopusauthoridLau, KT=7401559898en_US
dc.identifier.scopusauthoridCheng, L=7403337597en_US
dc.identifier.scopusauthoridChow, KW=13605209900en_US
dc.identifier.citeulike381316-

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