Laser ultrasonic study of crack tip diffraction

From National Research Council Canada

Download	View accepted manuscript: Laser ultrasonic study of crack tip diffraction (PDF, 983 KiB)
DOI	Resolve DOI: https://doi.org/10.1063/1.1570306
Author	Search for: Ochiai, M.; Search for: Lévesque, D.¹; Search for: Talbot, R.¹; Search for: Blouin, A.¹; Search for: Fukumoto, A.; Search for: Monchalin, J.-P.¹
Affiliation	National Research Council Canada. NRC Industrial Materials Institute
Format	Text, Article
Conference	29th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), July 14-19, 2002, Bellingham, Washington (USA)
Subject	ultrasonic phenomena; wave mechanics; electronic noise; shear waves; laser ultrasonics; crack initiation and detection
Abstract	Ultrasonic diffraction pattern at a crack tip and crack depth sizing based on the diffraction are studied by using laser‐generated bulk waves. Directivity patterns oriented essentially along the normal for the diffracted longitudinal wave and essentially at 45 (deg) for the diffracted shear wave for any incident angles is obtained. A laser‐ultrasonic system combined with time‐of‐flight (TOFD) analysis is produced and demonstrates accurate crack sizing on an artificial slot having a variable depth from 0 mm to 10 mm. An improvement of signal‐to‐noise ratio by split spectrum processing (SSP) is also suggested.
Publication date	2003
Publisher	AIP
Licence	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing https://publishing.aip.org/resources/researchers/rights-and-permissions/sharing-content-online/
In	AIP Conference Proceedings 657, no. 1 (2003): 1489–1496.
Language	English
Peer reviewed	Yes
NRC number	NRC-IMI2002-95836-G CNRC 45780
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Record identifier	d2ac9fbc-4c4b-47ef-9d4b-e9bc72295c15
Record created	2023-08-31
Record modified	2023-08-31

Date modified:: 2025-12-16