Rapid thickness measurements using guided waves from a scanning laser source

Hayashi, Takahiro; Murase, Morimasa; Salim, Muhammad Nor

The Journal of the Acoustical Society of America, 2009, 126(3), 1101-1106

Number of Access:352（2025-08-14 07:54 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84503

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Title
Rapid thickness measurements using guided waves from a scanning laser source
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
Murase, Morimasa
CreatorName
Salim, Muhammad Nor
Description
Takahiro Hayashia, Morimasa Murase and Muhammad Nor Salim. Rapid thickness measurements using guided waves from a scanning laser source. Journal of the Acoustical Society of America, 2009, 126(3), 1101. https://doi.org/10.1121/1.3177268.
Abstract
Guided waves have been effectively used for rapid inspections of plates and pipes. However, the guided-wave technique is not generally used for measuring the remaining thickness in a plate and a pipe due to the difficulties in guided-wave motion. Instead, time-consuming and costly direct contact thickness measurements are still used in practice. This study describes a thickness measurement technique using the A0 mode of a Lamb wave generated by a laser source. A finite element analysis of Lamb wave revealed that this mode propagates with small reflections and mode conversions at a rounded shallow defect and has larger amplitude at thinner regions. Using these characteristics, it is experimentally demonstrated that the distributions of plate thickness were obtained from the amplitude of A0 mode generated by a scanning laser source and received by an angle-beam transducer. The resulting distribution images were obtained at extremely high speed compared to the conventional thickness measurements.
Publisher
Acoustical Society of America
Source Title
The Journal of the Acoustical Society of America
Volume (Issue)
126(3)
Page
1101-1106
Date of Issued
2009-09
Language
English
Handle URL
https://hdl.handle.net/11094/84503
PISSN
00014966
NCID
AA00253792
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1121/1.3177268
Access Rights
open access
CopyRight
Copyright 2009 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article