Detection of Defects in a Plate Using Rayleigh-Lamb Waves

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Title: Detection of Defects in a Plate Using Rayleigh-Lamb Waves
Authors: Conry, M. J.
Crane, L. J.
Gilchrist, M. D.
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Date: 18-Mar-2011
Abstract: Nondestructive testing of materials is essential wherever they are used in safety critical applications. Conventional ultrasonic techniques, such as C-scanning, generally use waves propagating normal to the plane surface. While accurate, such methods are slow for structures with large plane areas. The use of longitudinal waves offers the possibility of quicker testing of such structures. This paper considers the reflection of low frequency Rayleigh-Lamb waves by a two dimensional, centrally embedded vertical defect in aluminium plate. A numerical method is used, based on results from dimensionless analytical work. It is shown that such longitudinal ultrasonic waves can successfully detect structural defects.
Type of material: Journal Article
Publisher: Wiley Blackwell (John Wiley & Sons)
Copyright (published version): 2011 Wiley Blackwell (John Wiley & Sons)
Keywords: Rayleigh-Lamb waves;Crack detection;Ultrasonics
DOI: 10.1002/zamm.200008014104
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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