Dynamic response of an elliptic cylinder inclusion with imperfect interfaces subjected to plane SH wave

Luo, H; Tao, M; Wu, C; Cao, W

Dynamic response of an elliptic cylinder inclusion with imperfect interfaces subjected to plane SH wave

Luo, H Tao, M Wu, C

Cao, W

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Publisher:: Springer Nature
Publication Type:: Journal Article
Citation:: Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023, 9, (1), pp. 24
Issue Date:: 2023-12

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Field	Value	Language
dc.contributor.author	Luo, H
dc.contributor.author	Tao, M
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Cao, W
dc.date.accessioned	2023-03-26T21:13:47Z
dc.date.available	2023-03-26T21:13:47Z
dc.date.issued	2023-12
dc.identifier.citation	Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023, 9, (1), pp. 24
dc.identifier.issn	2363-8419
dc.identifier.issn	2363-8427
dc.identifier.uri	http://hdl.handle.net/10453/168409
dc.description.abstract	<jats:title>Abstract</jats:title><jats:p>Underground chambers or tunnels often contain inclusions, the interface between the inclusion and the surrounding rock is not always perfect, which influences stress wave propagation. In this study, the imperfect interface and transient seismic wave were represented using the spring model and Ricker wavelet. Based on the wave function expansion method and Fourier transform, an analytical formula for the dynamic stress concentration factor (DSCF) for an elliptical inclusion with imperfect interfaces subjected to a plane SH-wave was determined. The theoretical solution was verified via numerical simulations using the LS-DYNA software, and the results were analyzed. The effects of the wave number (<jats:italic>k</jats:italic>), radial coordinate (<jats:italic>ξ</jats:italic>), stiffness parameter (<jats:italic>β</jats:italic>), and differences in material properties on the dynamic response were evaluated. The numerical results revealed that the maximum DSCF always occurred at both ends of the elliptical minor axis, and the transient DSCF was generally a factor of 2–3 greater than the steady-state DSCF. Changes in <jats:italic>k</jats:italic> and <jats:italic>ξ</jats:italic> led to variations in the DSCF value and spatial distribution, changes in <jats:italic>β</jats:italic> resulted only in variations in the DSCF value, and lower values of <jats:italic>ω</jats:italic><jats:sub><jats:italic>p</jats:italic></jats:sub> and <jats:italic>β</jats:italic> led to a greater DSCF under the same parameter conditions. In addition, the differences in material properties between the medium and inclusion significantly affected the variation characteristics of the DSCF with <jats:italic>k</jats:italic> and <jats:italic>ξ</jats:italic>.</jats:p>
dc.language	en
dc.publisher	Springer Nature
dc.relation.ispartof	Geomechanics and Geophysics for Geo-Energy and Geo-Resources
dc.relation.isbasedon	10.1007/s40948-023-00559-7
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Dynamic response of an elliptic cylinder inclusion with imperfect interfaces subjected to plane SH wave
dc.type	Journal Article
utslib.citation.volume	9
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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	open_access	*
dc.date.updated	2023-03-26T21:13:46Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	9
utslib.citation.issue	1

Abstract:

AbstractUnderground chambers or tunnels often contain inclusions, the interface between the inclusion and the surrounding rock is not always perfect, which influences stress wave propagation. In this study, the imperfect interface and transient seismic wave were represented using the spring model and Ricker wavelet. Based on the wave function expansion method and Fourier transform, an analytical formula for the dynamic stress concentration factor (DSCF) for an elliptical inclusion with imperfect interfaces subjected to a plane SH-wave was determined. The theoretical solution was verified via numerical simulations using the LS-DYNA software, and the results were analyzed. The effects of the wave number (k), radial coordinate (ξ), stiffness parameter (β), and differences in material properties on the dynamic response were evaluated. The numerical results revealed that the maximum DSCF always occurred at both ends of the elliptical minor axis, and the transient DSCF was generally a factor of 2–3 greater than the steady-state DSCF. Changes in k and ξ led to variations in the DSCF value and spatial distribution, changes in β resulted only in variations in the DSCF value, and lower values of ωp and β led to a greater DSCF under the same parameter conditions. In addition, the differences in material properties between the medium and inclusion significantly affected the variation characteristics of the DSCF with k and ξ.

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http://hdl.handle.net/10453/168409