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Ultrasonic imaging of buried defects in rails

Article dans une revue avec comité de lecture
Author
ccRODRIGUEZ, Samuel
1002421 Institut de Mécanique et d'Ingénierie [I2M]
GAYOUX, Victor
ccDUCASSE, Eric
1002421 Institut de Mécanique et d'Ingénierie [I2M]
CASTAINGS, Michel
1002421 Institut de Mécanique et d'Ingénierie [I2M]
PATTEEUW, Nicolas

URI
http://hdl.handle.net/10985/23365
DOI
10.1016/j.ndteint.2022.102737
Date
2023-01
Journal
NDT&E International

Abstract

The present work addresses the ultrasonic NDT of rails, more precisely of the rail foot. The practical constraint is that transducers must be located on the rail head, whereas the region of interest is the rail foot. Thus, there is no direct acoustic path between the transducers and the region of interest. As classical delay and sum methods cannot be applied to such cases, the goal of the paper is to numerically assess the potentiality of the topological imaging method to investigate the rail foot. Three specific typical rail foot defects are investigated, namely, longitudinal vertical cracks, corrosion pits and rail injuries. Simulating eight transducers with different polarizations, the images obtained show that the detection and approximate location of the various defects are possible.

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