Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates

Mori, Naoki; Hayashi, Takahiro

doi:https://doi.org/10.1016/j.jsv.2022.117531

Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates

Mori, Naoki; Hayashi, Takahiro

Journal of Sound and Vibration, 2022, 547, 117531

アクセス数:424件（2025-08-14 12:54 集計）

固定URL: https://hdl.handle.net/11094/89873

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タイトル	Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates
著者	NRID 1000000802092 1000000802092 researchmap permalink 7000020478 7000020478 Scopus Author ID 55614094500 55614094500 ORCID 0000-0002-0707-3443 0000-0002-0707-3443 著者名 Mori, Naoki
著者	NRID 1000030324479 1000030324479 ORCID 0000-0001-6064-4658 0000-0001-6064-4658 researchmap permalink takahiro_hayashi takahiro_hayashi Scopus Author ID 37064150200 37064150200 著者名 Hayashi, Takahiro
キーワード等	Layered structure
	Interference
	Critical attenuation
	Reflection
	Viscoelasticity
内容	Naoki Mori, Takahiro Hayashi, Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates, Journal of Sound and Vibration, Volume 547, 2023, 117531, https://doi.org/10.1016/j.jsv.2022.117531.
抄録	The resonance of ultrasonic waves in a metal-plastic bilayer laminate placed in an infinite medium is theoretically investigated, and critical attenuation is shown to occur under specific conditions. The bilayer laminate is subjected to normal wave incidence from the side of the plastic layer. Based on a linear viscoelastic model, the amplitude of the reflection spectrum for the laminate is formulated to obtain the exact results for wave resonance and critical attenuation by numerical calculations. Furthermore, the approximate formulae for the conditions of the resonance and critical attenuation are derived explicitly by Taylor expansions with respect to the loss factor of the plastic. As a result, the exact solution shows that the resonance frequencies of the plastic layer slightly increase with increasing loss factor. Their variation with the loss factor agrees well with the second-order approximation result but is insignificant in the cases of common plastics with relatively low loss factors. The exact results also show that the amplitude at each order resonance depends on the loss factor and has a minimum at a critical loss factor. The obtained critical loss factor decreases with increasing resonance order and is well reproduced by the zeroth-order approximation. Experiments are performed on two types of metal-plastic bonded laminates, demonstrating that the measured reflection spectra are in good agreement with the theoretical predictions. In particular, the amplitude of the measured reflection spectrum decreases significantly at a resonance frequency, which is theoretically predicted to satisfy the critical attenuation condition.
出版者	Elsevier
収録物名	Journal of Sound and Vibration
巻(号)	547
ページ	117531
刊行年月	2022-12-23
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89873
PISSN	0022460X
eISSN	10958568
NCID	AA00253704
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.jsv.2022.117531
アクセス権	open access
権利情報	©2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Journal of Sound and Vibration. 2022, 547, p. 117531
DC.title	Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates
DC.creator	Mori, Naoki
DC.creator	Hayashi, Takahiro
DC.publisher	Elsevier
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2022-12-23
DC.identifier	https://doi.org/10.1016/j.jsv.2022.117531
DC.subject	Layered structure
	Interference
	Critical attenuation
	Reflection
	Viscoelasticity
DC.description	Naoki Mori, Takahiro Hayashi, Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates, Journal of Sound and Vibration, Volume 547, 2023, 117531, https://doi.org/10.1016/j.jsv.2022.117531.
DCTERMS.abstract	The resonance of ultrasonic waves in a metal-plastic bilayer laminate placed in an infinite medium is theoretically investigated, and critical attenuation is shown to occur under specific conditions. The bilayer laminate is subjected to normal wave incidence from the side of the plastic layer. Based on a linear viscoelastic model, the amplitude of the reflection spectrum for the laminate is formulated to obtain the exact results for wave resonance and critical attenuation by numerical calculations. Furthermore, the approximate formulae for the conditions of the resonance and critical attenuation are derived explicitly by Taylor expansions with respect to the loss factor of the plastic. As a result, the exact solution shows that the resonance frequencies of the plastic layer slightly increase with increasing loss factor. Their variation with the loss factor agrees well with the second-order approximation result but is insignificant in the cases of common plastics with relatively low loss factors. The exact results also show that the amplitude at each order resonance depends on the loss factor and has a minimum at a critical loss factor. The obtained critical loss factor decreases with increasing resonance order and is well reproduced by the zeroth-order approximation. Experiments are performed on two types of metal-plastic bonded laminates, demonstrating that the measured reflection spectra are in good agreement with the theoretical predictions. In particular, the amplitude of the measured reflection spectrum decreases significantly at a resonance frequency, which is theoretically predicted to satisfy the critical attenuation condition.
DC.rights	©2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	89873
citation_title	Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates
citation_author	Mori, Naoki
citation_author	Hayashi, Takahiro
citation_publisher	Elsevier
citation_language	英語
citation_date	2022-12-23
citation_journal_title	Journal of Sound and Vibration
citation_volume	547
citation_firstpage	117531
citation_doi	https://doi.org/10.1016/j.jsv.2022.117531
citation_public_url	https://hdl.handle.net/11094/89873

Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates

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