Free vibration and damage identification of cracked functionally graded plates

Zhu, LF; Ke, LL; Xiang, Y; Zhu, XQ

Free vibration and damage identification of cracked functionally graded plates

Zhu, LF Ke, LL Xiang, Y Zhu, XQ

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Composite Structures, 2020, 250
Issue Date:: 2020-10-15

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Field	Value	Language
dc.contributor.author	Zhu, LF
dc.contributor.author	Ke, LL
dc.contributor.author	Xiang, Y
dc.contributor.author	Zhu, XQ
dc.date.accessioned	2021-01-08T03:24:59Z
dc.date.available	2021-01-08T03:24:59Z
dc.date.issued	2020-10-15
dc.identifier.citation	Composite Structures, 2020, 250
dc.identifier.issn	0263-8223
dc.identifier.issn	1879-1085
dc.identifier.uri	http://hdl.handle.net/10453/145218
dc.description.abstract	© 2020 Elsevier Ltd This paper investigates the free vibration and crack identification of functionally graded material (FGM) plates with a through-width edge crack. The material properties of the FGM plates change continuously with the power law distribution along the plate thickness direction. The crack in an FGM plate is simulated as a massless rotational spring and the plate is separated into two sub-plates at the crack location connected by the line spring. The stress intensity factor (SIF) in the FGM strip is calculated to determine the stiffness of the spring. The governing equations of cracked FGM plates are derived from the Mindlin plate theory and solved by the differential quadrature (DQ) method to obtain modal parameters. The vibrational mode of a cracked FGM plate is analyzed by utilizing continuous wavelet transform (CWT). A novel damage index (DI) is developed based on calculated wavelet coefficients to localize the crack in FGM plates. This method can localize the crack accurately and reduce the edge effect even with the measurement noise.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Composite Structures
dc.relation.isbasedon	10.1016/j.compstruct.2020.112517
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	09 Engineering
dc.subject.classification	Materials
dc.title	Free vibration and damage identification of cracked functionally graded plates
dc.type	Journal Article
utslib.citation.volume	250
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-10-15T00:00:00+1000Z
dc.date.updated	2021-01-08T03:24:42Z
pubs.publication-status	Published
pubs.volume	250

Abstract:

© 2020 Elsevier Ltd This paper investigates the free vibration and crack identification of functionally graded material (FGM) plates with a through-width edge crack. The material properties of the FGM plates change continuously with the power law distribution along the plate thickness direction. The crack in an FGM plate is simulated as a massless rotational spring and the plate is separated into two sub-plates at the crack location connected by the line spring. The stress intensity factor (SIF) in the FGM strip is calculated to determine the stiffness of the spring. The governing equations of cracked FGM plates are derived from the Mindlin plate theory and solved by the differential quadrature (DQ) method to obtain modal parameters. The vibrational mode of a cracked FGM plate is analyzed by utilizing continuous wavelet transform (CWT). A novel damage index (DI) is developed based on calculated wavelet coefficients to localize the crack in FGM plates. This method can localize the crack accurately and reduce the edge effect even with the measurement noise.

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http://hdl.handle.net/10453/145218