Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates

Mori, Naoki; Hayashi, Takahiro

Journal of Sound and Vibration, 2022, 547, 117531

Number of Access:476（2025-11-20 04:39 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89873

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Title
Ultrasonic interference and critical attenuation in metal-plastic bilayer laminates
Creator
NRID
1000000802092 1000000802092
researchmap permalink
7000020478 7000020478
Scopus Author ID
55614094500 55614094500
ORCID
0000-0002-0707-3443 0000-0002-0707-3443
CreatorName
Mori, Naoki
NRID
1000030324479 1000030324479
ORCID
0000-0001-6064-4658 0000-0001-6064-4658
researchmap permalink
takahiro_hayashi takahiro_hayashi
Scopus Author ID
37064150200 37064150200
CreatorName
Hayashi, Takahiro
Subject
Layered structure
Interference
Critical attenuation
Reflection
Viscoelasticity
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.
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.
Publisher
Elsevier
Source Title
Journal of Sound and Vibration
Volume (Issue)
547
Page
117531
Date of Issued
2022-12-23
Language
English
Handle URL
https://hdl.handle.net/11094/89873
PISSN
0022460X
eISSN
10958568
NCID
AA00253704
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.jsv.2022.117531
Access Rights
open access
CopyRight
©2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article