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Conry, M. J.
Preferred name
Conry, M. J.
Official Name
Conry, M. J.
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Now showing 1 - 2 of 2
- PublicationRayleigh-Lamb wave detection of two-dimensional defects in metal platesNondestructive testing of engineering structures is essential to ensure safety. Ultrasonic C-scanning uses waves ropagating normal to a plane surface. This is accurate, but slow for planar structures. Longitudinal waves would allow quicker testing of such structtwes. This paper considers the reflection of low to moderate frequency Rayleigh Lamb waves by a through width lozenge-shaped defect in an isotropic plate. A numerical method is used. It is shown that such longitudinal ultrasonic waves can be used with success to detect and locate structural defects if care is exercies in frequency selection.
96 - PublicationDetection of Defects in a Plate Using Rayleigh-Lamb WavesNondestructive 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.
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