Failure of railway axles, although infrequent, can lead to derailments and possibly serious crashes. Failures are by fatigue crack growth. Periodic axle inspection by various techniques has been used to detect the cracks before they reach dangerous levels. The period of the inspection is based on the sensitivity and reliability of the inspection techniques, generally expressed in terms of a probability of detection (POD) curve. Typically the POD curves used for axle inspection periodicity are based on empirical knowledge and work in other industries. However, as part of the EC project WIDEM (Wheelset Integrated Design and Maintenance), experimental work to determine POD curves for various situations has been carried out. This paper describes the work carried out to determine POD curves for ultrasonics on a set of fatigue cracked axles. The range of validity of the results and the application to other situations will be considered.
Investigation of inspection performance on cracked railway axles
Untersuchung der Prüfmöglichkeiten an Eisenbahnachsen mit Rissen
2006
11 Seiten, 12 Bilder, 1 Tabelle, 3 Quellen
Conference paper
Storage medium
English
Recent advances in ultrasonic inspection of railway axles and wheels
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