Crack identification of functionally graded beams using continuous wavelet transform

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

Crack identification of functionally graded beams using continuous wavelet transform

Zhu, LF Ke, LL Zhu, XQ

Xiang, Y Wang, YS

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Publication Type:: Journal Article
Citation:: Composite Structures, 2019, 210 pp. 473 - 485
Issue Date:: 2019-02-15

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Field	Value	Language
dc.contributor.author	Zhu, LF	en_US
dc.contributor.author	Ke, LL	en_US
dc.contributor.author	Zhu, XQ https://orcid.org/0000-0001-5083-9320	en_US
dc.contributor.author	Xiang, Y	en_US
dc.contributor.author	Wang, YS	en_US
dc.date.available	2021-03-22T18:02:47Z
dc.date.issued	2019-02-15	en_US
dc.identifier.citation	Composite Structures, 2019, 210 pp. 473 - 485	en_US
dc.identifier.issn	0263-8223	en_US
dc.identifier.uri	http://hdl.handle.net/10453/129015
dc.description.abstract	© 2018 Elsevier Ltd This paper proposes a new damage index for the crack identification of beams made of functionally graded materials (FGMs) by using the wavelet analysis. The damage index is defined based on the position of the wavelet coefficient modulus maxima in the scale space. The crack is assumed to be an open edge crack and is modeled by a massless rotational spring. It is assumed that the material properties follow exponential distributions along the beam thickness direction. The Timoshenko beam theory is employed to derive the governing equations which are solved analytically to obtain the frequency and mode shape of cracked FGM beams. Then, we apply the continuous wavelet transform (CWT) to the mode shapes of the cracked FGM beams. The locations of the cracks are determined from the sudden changes in the spatial variation of the damage index. An intensity factor, which relates to the size of the crack and the coefficient of the wavelet transform, is employed to estimate the crack depth. The effects of the crack size, the crack location and the Young's modulus ratio on the crack depth detection are investigated.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160103197
dc.relation.ispartof	Composite Structures	en_US
dc.relation.isbasedon	10.1016/j.compstruct.2018.11.042	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Materials	en_US
dc.title	Crack identification of functionally graded beams using continuous wavelet transform	en_US
dc.type	Journal Article
utslib.citation.volume	210	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
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
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	210	en_US

Abstract:

© 2018 Elsevier Ltd This paper proposes a new damage index for the crack identification of beams made of functionally graded materials (FGMs) by using the wavelet analysis. The damage index is defined based on the position of the wavelet coefficient modulus maxima in the scale space. The crack is assumed to be an open edge crack and is modeled by a massless rotational spring. It is assumed that the material properties follow exponential distributions along the beam thickness direction. The Timoshenko beam theory is employed to derive the governing equations which are solved analytically to obtain the frequency and mode shape of cracked FGM beams. Then, we apply the continuous wavelet transform (CWT) to the mode shapes of the cracked FGM beams. The locations of the cracks are determined from the sudden changes in the spatial variation of the damage index. An intensity factor, which relates to the size of the crack and the coefficient of the wavelet transform, is employed to estimate the crack depth. The effects of the crack size, the crack location and the Young's modulus ratio on the crack depth detection are investigated.

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http://hdl.handle.net/10453/129015