Energy Analyses for the Imaging Technique of Bonded Regions and Delaminations in a Thin Plate

Hayashi, Takahiro; Nakao, Shogo

Materials Transactions, 2017, 58(9), 1264-1273

Number of Access:411（2025-08-14 04:52 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84554

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Title
Energy Analyses for the Imaging Technique of Bonded Regions and Delaminations in a Thin Plate
Creator
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
CreatorName
Nakao, Shogo
Subject
non-destructive testing
Lamb waves
numerical analysis
scanning laser source technique
Description
Takahiro Hayashi, Shogo Nakao. Energy Analyses for the Imaging Technique of Bonded Regions and Delaminations in a Thin Plate MATERIALS TRANSACTIONS, 2017, 58(9), pp. 1264-1273. https://doi.org/10.2320/matertrans.M2017151.
Abstract
Defect imaging by a scanning laser source technique has been theoretically and experimentally investigated for a notch and a wall thinning in a plate. This study discusses the applicability of the imaging technique to bonding regions and delaminations in a thin plate. The variations of flexural wave energy generated at a laser source close to a plate edge, a junction of two thin plates, a bonded region, and a delamination are discussed using the Kirchhoff–Love plate theory and a semi-analytical finite element method. The numerical analyses reveal that the flexural wave energy generated in the vicinity of the reflection objects are significantly different in such a source type as normal loading and dipole loading modeled for elastic wave generations due to ablation and thermo-elastic effects, respectively. In particular, the numerical analyses reveal that the dipole loading is more effective to the imaging because the generation energy significantly varies at the boundaries between bonded and separated regions. Moreover, the images of a plate with a bonded region are obtained using an experimental system in which the thermo-elastic effect is dominant for generating elastic waves, and they exhibit similar tendencies with calculated results.
Publisher
The Japan Institute of Metals and Materials
Source Title
Materials Transactions
Volume (Issue)
58(9)
Page
1264-1273
Date of Issued
2017-09-01
Language
English
Handle URL
https://hdl.handle.net/11094/84554
PISSN
13459678
eISSN
13475320
NCID
AA1151294X
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2320/matertrans.M2017151
Access Rights
open access
CopyRight
© 2017 The Japan Institute of Metals and Materials
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article