Tangential bond stiffness evaluation of adhesive lap joints by spectral interference of the low-frequency A0 lamb wave

Mori, Naoki; Wakabayashi, Daichi; Hayashi, Takahiro

International Journal of Adhesion and Adhesives, 2022, 113, 103071

Number of Access:404（2025-08-14 15:06 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/87652

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Title
Tangential bond stiffness evaluation of adhesive lap joints by spectral interference of the low-frequency A0 lamb wave
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
CreatorName
Wakabayashi, Daichi
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
Non-destructive testing
Interfaces
Guided wave
Ultrasonic spectroscopy
Description
Naoki Mori, Daichi Wakabayashi, Takahiro Hayashi, Tangential bond stiffness evaluation of adhesive lap joints by spectral interference of the low-frequency A0 lamb wave, International Journal of Adhesion and Adhesives, Volume 113, 2022, 103071, https://doi.org/10.1016/j.ijadhadh.2021.103071.
Abstract
Transmission spectra of the lowest-order antisymmetric (A0) Lamb wave for adhesively bonded single lap joints are experimentally investigated in a frequency range below 0.4 MHz. Based on the theoretical results of the wave interference, a tangential bond stiffness evaluation method is proposed for the lap joints. Aluminum alloy plates bonded with epoxy adhesive on different conditions were prepared as bonded specimens. An air-coupled ultrasonic transducer was used to generate the A0 mode in the specimens, and the signals of the transmitted waves across the joints were measured with a pin-type piezoelectric transducer. Spectral analysis was performed for the measured waveforms, and the transmission coefficient was calculated for each specimen as a function of frequency. The experimental results showed that the transmission coefficient has local maxima and minima at multiple frequencies, called peak and notch frequencies, respectively. The sets of the peak and notch frequencies were different among the bonded specimens. Based on the peak and notch frequencies, the tangential bond stiffness was estimated for each bonded specimen. As a result, the bond stiffnesses obtained for the specimens with the same nominal bond thickness and adherend pretreatment were almost equal even if the bond lengths were different. Furthermore, the evaluation results showed that pretreatments such as sanding and contamination of adherend surfaces affect the bond stiffness due to the change in the interfacial stiffness.
Publisher
Elsevier
Source Title
International Journal of Adhesion and Adhesives
Volume (Issue)
113
Page
103071
Date of Issued
2022-03
Language
English
Handle URL
https://hdl.handle.net/11094/87652
PISSN
01437496
NCID
AA10623253
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.ijadhadh.2021.103071
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article