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Article: Theoretical and experimental studies on the electric impedance of active piezoelectric sensors bonded on cracked beams

TitleTheoretical and experimental studies on the electric impedance of active piezoelectric sensors bonded on cracked beams
Authors
KeywordsCrack Propagation
Electric Impedance
Electric Impedance Measurement
Electric Sensing Devices
Piezoelectric Transducers
Piezoelectricity
Structural Health Monitoring
Issue Date2010
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/sms
Citation
Smart Materials And Structures, 2010, v. 19 n. 4 How to Cite?
AbstractThe electric impedance of symmetrically surface-bonded piezoelectric sensors on a cracked beam is studied. To investigate the effect of the crack on the electric impedance in a convenient fashion, an analytical expression is derived that is correlated to the physical parameters of the crack and the host beam. The beam segment covered with piezoelectric patches and the cracked region are regarded as a bimorph segment and an equivalent spring, respectively, and the entire beam system is then represented by three elastic beam segments and a bimorph segment together with the spring. Electric impedance experiments are also conducted for uncracked beams and for cracked beams with single-edge or double-edge cracks. The experimental results agree with those generated by the analytical expression. The crack depth has little effect on the corresponding mode frequency for cracks located at the mode node of a beam. For cracks located away from the mode node, the corresponding mode frequency decreases as the crack depth increases. Moreover, the closer the crack to the anti-node of the mode, the greater the decrease in the corresponding mode frequency. The mechanism of these changes is discussed. The findings should prove helpful for structural health monitoring using active piezoelectric sensors. © IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/141701
ISSN
2015 Impact Factor: 2.769
2015 SCImago Journal Rankings: 1.171
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Polytechnic UniversityG-YX2J
Hong Kong Special Administrative Region113809
Natural Science Foundation of China10902041
Funding Information:

The work described in this paper was supported by the Hong Kong Polytechnic University (Project No: G-YX2J), the Research Grants Council of the Hong Kong Special Administrative Region (Project No: CityU 113809), and the Natural Science Foundation of China (Project No: 10902041).

References

 

DC FieldValueLanguage
dc.contributor.authorKuang, YDen_HK
dc.contributor.authorShi, SQen_HK
dc.contributor.authorChan, PKLen_HK
dc.contributor.authorHe, XQen_HK
dc.contributor.authorChen, CYen_HK
dc.date.accessioned2011-09-27T02:58:18Z-
dc.date.available2011-09-27T02:58:18Z-
dc.date.issued2010en_HK
dc.identifier.citationSmart Materials And Structures, 2010, v. 19 n. 4en_HK
dc.identifier.issn0964-1726en_HK
dc.identifier.urihttp://hdl.handle.net/10722/141701-
dc.description.abstractThe electric impedance of symmetrically surface-bonded piezoelectric sensors on a cracked beam is studied. To investigate the effect of the crack on the electric impedance in a convenient fashion, an analytical expression is derived that is correlated to the physical parameters of the crack and the host beam. The beam segment covered with piezoelectric patches and the cracked region are regarded as a bimorph segment and an equivalent spring, respectively, and the entire beam system is then represented by three elastic beam segments and a bimorph segment together with the spring. Electric impedance experiments are also conducted for uncracked beams and for cracked beams with single-edge or double-edge cracks. The experimental results agree with those generated by the analytical expression. The crack depth has little effect on the corresponding mode frequency for cracks located at the mode node of a beam. For cracks located away from the mode node, the corresponding mode frequency decreases as the crack depth increases. Moreover, the closer the crack to the anti-node of the mode, the greater the decrease in the corresponding mode frequency. The mechanism of these changes is discussed. The findings should prove helpful for structural health monitoring using active piezoelectric sensors. © IOP Publishing Ltd.en_HK
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/smsen_HK
dc.relation.ispartofSmart Materials and Structuresen_HK
dc.subjectCrack Propagationen_US
dc.subjectElectric Impedanceen_US
dc.subjectElectric Impedance Measurementen_US
dc.subjectElectric Sensing Devicesen_US
dc.subjectPiezoelectric Transducersen_US
dc.subjectPiezoelectricityen_US
dc.subjectStructural Health Monitoringen_US
dc.titleTheoretical and experimental studies on the electric impedance of active piezoelectric sensors bonded on cracked beamsen_HK
dc.typeArticleen_HK
dc.identifier.emailChan, PKL:pklc@hku.hken_HK
dc.identifier.authorityChan, PKL=rp01532en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0964-1726/19/4/045021en_HK
dc.identifier.scopuseid_2-s2.0-77949898862en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77949898862&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue4en_HK
dc.identifier.eissn1361-665X-
dc.identifier.isiWOS:000275842000021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridKuang, YD=25644718300en_HK
dc.identifier.scopusauthoridShi, SQ=7402200920en_HK
dc.identifier.scopusauthoridChan, PKL=35742829700en_HK
dc.identifier.scopusauthoridHe, XQ=14031368000en_HK
dc.identifier.scopusauthoridChen, CY=7501955518en_HK

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