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Transverse and longitudinal crack detection in the head of rail tracks using Rayleigh wave-like wideband guided ultrasonic waves
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UNSPECIFIED (2005) Transverse and longitudinal crack detection in the head of rail tracks using Rayleigh wave-like wideband guided ultrasonic waves. In: 4th Conference on Nondestructive Evaluation and Health Monitoring of Aerospace Materials, Composites, and Civil Infrastructure, San Diego, CA, MAR 08-10, 2005. Published in: Nondestructive Evaluation and Health Monitoring of Aerospace Materials, Composites, and Civil Infrastructure IV, 5767 pp. 70-80. ISBN 0-8194-5748-5. doi:10.1117/12.598142 ISSN 0277-786X.
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Official URL: http://dx.doi.org/10.1117/12.598142
Abstract
We have developed a 'pitch-catch' low frequency-wideband Rayleigh wave EMAT system with a centre frequency of approximately 200kHz, extending to around 500kHz and study here its applicability to crack detection in the head of rail tracks. On the head of a rail, the generated waves are strictly speaking a type of guided wave mode as the propagation surface is not a flat halfspace. They propagate along the surface of the rail penetrating down to a depth of several millimetres. We have used this approach to demonstrate detection of gauge corner and longitudinal cracking in the rail head. On samples containing machined slots we have shown that crack depth can be estimated by measuring the proportion of the ultrasonic wave at a particular frequency that passes underneath the crack. The approach that we have used is fundamentally different to and has several advantages over conventional ultrasonic contact methods and should ultimately facilitate testing the rail head more thoroughly at higher speeds.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Series Name: | PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) | ||||
Journal or Publication Title: | Nondestructive Evaluation and Health Monitoring of Aerospace Materials, Composites, and Civil Infrastructure IV | ||||
Publisher: | SPIE-INT SOC OPTICAL ENGINEERING | ||||
ISBN: | 0-8194-5748-5 | ||||
ISSN: | 0277-786X | ||||
Editor: | Shull, PJ and Gyekenyesi, AL and Mufti, AA | ||||
Official Date: | 2005 | ||||
Dates: |
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Volume: | 5767 | ||||
Number of Pages: | 11 | ||||
Page Range: | pp. 70-80 | ||||
DOI: | 10.1117/12.598142 | ||||
Publication Status: | Published | ||||
Title of Event: | 4th Conference on Nondestructive Evaluation and Health Monitoring of Aerospace Materials, Composites, and Civil Infrastructure | ||||
Location of Event: | San Diego, CA | ||||
Date(s) of Event: | MAR 08-10, 2005 |
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