Laser ultrasonic study of crack tip diffraction

Par Conseil national de recherches du Canada

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DOI	Trouver le DOI : https://doi.org/10.1063/1.1570306
Auteur	Rechercher : Ochiai, M.; Rechercher : Lévesque, D.¹; Rechercher : Talbot, R.¹; Rechercher : Blouin, A.¹; Rechercher : Fukumoto, A.; Rechercher : Monchalin, J.-P.¹
Affiliation	Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
Format	Texte, Article
Conférence	29th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), July 14-19, 2002, Bellingham, Washington (USA)
Sujet	ultrasonic phenomena; wave mechanics; electronic noise; shear waves; laser ultrasonics; crack initiation and detection
Résumé	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.
Date de publication	2003
Maison d’édition	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/
Dans	AIP Conference Proceedings 657, nº 1 (2003) : 1489–1496.
Langue	anglais
Publications évaluées par des pairs	Oui
Numéro du CNRC	NRC-IMI2002-95836-G CNRC 45780
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Identificateur de l’enregistrement	d2ac9fbc-4c4b-47ef-9d4b-e9bc72295c15
Enregistrement créé	2023-08-31
Enregistrement modifié	2023-08-31

Date de modification :: 2024-06-30