Vibrational power flow analysis of cracked functionally graded beams

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

Vibrational power flow analysis of cracked functionally graded beams

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

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Thin-Walled Structures, 2020, 150
Issue Date:: 2020-05-01

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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.contributor.author	Wang, YS
dc.date.accessioned	2021-01-29T05:04:43Z
dc.date.available	2021-01-29T05:04:43Z
dc.date.issued	2020-05-01
dc.identifier.citation	Thin-Walled Structures, 2020, 150
dc.identifier.issn	0263-8231
dc.identifier.issn	0263-8231
dc.identifier.uri	http://hdl.handle.net/10453/145660
dc.description.abstract	© 2020 Elsevier Ltd In this paper, the vibrational power flow of a cracked beam made of functionally graded materials (FGMs) is investigated. The Young's modulus and mass density change exponentially along the thickness direction of the beam. The cracked FGM beam is divided into two sub-beams at the crack section which are connected by a massless rotational spring. Based on the Timoshenko beam theory, the governing equations of the cracked FGM beam are derived by using the neutral plane as the reference plane. The dynamic response of the FGM beam subjected to a harmonic concentrated transverse force is solved by the wave propagation approach. The input power flow and the transmitted power flow are obtained. The effect of the crack location and depth and the Young's modulus ratio on the input power flow and the transmitted power flow is studied in detail. A new damage index (DI) for the crack identification of FGM beams is proposed by applying continuous wavelet transform (CWT) to the transmitted power flow distribution along the beam longitudinal direction. The peak of DI indicates the crack location in FGM beams with small crack depth.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Thin-Walled Structures
dc.relation.isbasedon	10.1016/j.tws.2020.106626
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0901 Aerospace Engineering, 0905 Civil Engineering, 0913 Mechanical Engineering
dc.subject.classification	Civil Engineering
dc.title	Vibrational power flow analysis of cracked functionally graded beams
dc.type	Journal Article
utslib.citation.volume	150
utslib.for	0901 Aerospace Engineering
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical 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	*
pubs.consider-herdc	false
dc.date.updated	2021-01-29T05:04:37Z
pubs.publication-status	Published
pubs.volume	150

Abstract:

© 2020 Elsevier Ltd In this paper, the vibrational power flow of a cracked beam made of functionally graded materials (FGMs) is investigated. The Young's modulus and mass density change exponentially along the thickness direction of the beam. The cracked FGM beam is divided into two sub-beams at the crack section which are connected by a massless rotational spring. Based on the Timoshenko beam theory, the governing equations of the cracked FGM beam are derived by using the neutral plane as the reference plane. The dynamic response of the FGM beam subjected to a harmonic concentrated transverse force is solved by the wave propagation approach. The input power flow and the transmitted power flow are obtained. The effect of the crack location and depth and the Young's modulus ratio on the input power flow and the transmitted power flow is studied in detail. A new damage index (DI) for the crack identification of FGM beams is proposed by applying continuous wavelet transform (CWT) to the transmitted power flow distribution along the beam longitudinal direction. The peak of DI indicates the crack location in FGM beams with small crack depth.

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http://hdl.handle.net/10453/145660