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Ultrasonic characterisation of a wheel/rail contact
KTH, Superseded Departments, Machine Design.ORCID iD: 0000-0003-2489-0688
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2004 (English)In: Transient Processes in Tribology, 2004, Vol. 43, 151-158 p.Conference paper, Published paper (Refereed)
Abstract [en]

A quantification of stress in a wheel/rail contact is essential information required in fatigue and wear calculations for determining design life, regrinding and maintenance schedules. The aim of this work was to use ultrasound to non-destructively determine wheel/rail contact pressures. A wheel/rail interface behaves like a spring. If the pressure is high there are few air gaps; so it is very stiff and allows transmission of an ultrasonic wave. If the pressure is low then interface stiffness is lower and most ultrasound is reflected. A spring model was used to determine maps of contact stiffness from wheel/rail contact ultrasonic reflection data. A calibration procedure was then used to determine the pressure. Measured contact pressure contours are compared with those predicted by various contact theories.

Place, publisher, year, edition, pages
2004. Vol. 43, 151-158 p.
Series
Tribology Series, ISSN 0167-8922 ; 43
Keyword [en]
air, calibration, conference paper, mathematical computing, mathematical model, prediction, pressure, railway, rigidity, stress, ultrasound
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-157312ISI: 000228466000015Scopus ID: 2-s2.0-17644391798ISBN: 0-444-51706-5 (print)OAI: oai:DiVA.org:kth-157312DiVA: diva2:770212
Conference
30th Leeds-Lyon Symposium on Tribology, Inst Natl Sci Appl, Lyon, FRANCE, SEP 02-05, 2003
Note

QC 20141210

Available from: 2014-12-10 Created: 2014-12-08 Last updated: 2014-12-10Bibliographically approved

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Olofsson, UlfBjörklund, Stefan

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