Vibration energy analysis of a plate for defect imaging with a scanning laser source technique

Hayashi, Takahiro; Fukuyama, Misaki

The Journal of the Acoustical Society of America, 2016, 140(4), 2427-2436

Number of Access:408（2025-08-14 15:06 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84489

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
JAcoustSocAm_140_4_2427 pdf None 1.90 MB 180 2021.09.21  

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Vibration energy analysis of a plate for defect imaging with a scanning laser source technique
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
Fukuyama, Misaki
Description
Takahiro Hayashia and Misaki Fukuyama. Vibration energy analysis of a plate for defect imaging with a scanning laser source technique. Journal of the Acoustical Society of America, 2016, 140(4), 2427. https://doi.org/10.1121/1.4964275.
Abstract
Vibration energies generated by laser irradiation to a plate with a crack were calculated by the semi-analytical finite element method to elucidate the principle of defect imaging using a scanning laser source. For normal incidence in the ablation regime, the incident energy increases when the incident source is located in the vicinity of the crack, owing to the effect of the non-propagating A1 modes. For dipole loading in the thermoelastic regime, the vibration energies are completely different, depending on the position of the crack opening. If the crack opening is located opposite the incident source, the vibration energy increases abruptly in the vicinity of the crack, which is affected by the higher-order non-propagating modes as well as the A1 modes. When the crack opening and the incident source are located on the same side, the generated energy approaches zero as the source moves closer to the crack. The energy reduction around the crack is caused by the superposition of the incident wave from dipole loading and the phase-inverted reflected wave. The results of experiments conducted to verify the energy variations in the vicinity of a crack were in good agreement with the numerical results for dipole loading.
Publisher
Acoustical Society of America
Source Title
The Journal of the Acoustical Society of America
Volume (Issue)
140(4)
Page
2427-2436
Date of Issued
2016-10-07
Language
English
Handle URL
https://hdl.handle.net/11094/84489
PISSN
00014966
NCID
AA00253792
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1121/1.4964275
Access Rights
open access
CopyRight
Copyright 2016 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