Non-contact imaging for delamination using diffuse field concept

Nakao, Shogo; Hayashi, Takahiro

Japanese Journal of Applied Physics, 2019, 58, SGGB07

Number of Access:350（2025-08-14 18:27 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84494

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Title
Non-contact imaging for delamination using diffuse field concept
Creator
CreatorName
Nakao, Shogo
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
Description
This is the Accepted Manuscript version of an article accepted for publication in Japanese Journal of Applied Physics. IOP Publishing Ltd are not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.7567/1347-4065/ab0ada.
Abstract
The non-contact measurement called scanning laser source (SLS) technique is applied to imaging inspection for subsurface delamination in a metal block and the effect of frequencies used for imaging is discussed with finite element method and experiments for an aluminum alloy block. First, FE formulation for the vibration of a closed structure described the relation between resonances in the whole structure and vibration distributions, and FE calculation provided the resonant frequencies and the resonant patterns of a metal block, which agreed well with experimental results. Next, images were obtained for a specimen with delamination using the SLS technique. When narrowband burst waves were used, the delamination images were largely different due to the resonances. For broadband chirp waves, the clear delamination images could be obtained in the frequency ranges including multiple resonant frequencies because diffuse fields were well established.
Publisher
The Japan Society of Applied Physics
Source Title
Japanese Journal of Applied Physics
Volume (Issue)
58
Page
SGGB07
Date of Issued
2019-06-10
Language
English
Handle URL
https://hdl.handle.net/11094/84494
PISSN
00214922
eISSN
13474065
NCID
AA12295836
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.7567/1347-4065/ab0ada
Access Rights
open access
CopyRight
© 2019 The Japan Society of Applied Physics. This Accepted Manuscript is available for reuse under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License after the 12 month embargo period provided that all the terms of the license are adhered to.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article