Chasing the magic wear rate

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Proceedings titleProceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance
Series titleCivil-Comp Proceedings; no. 104
ConferenceSecond International Conference on Railway Technology: Research, Development and Maintenance, 8-11 April 2014, Ajaccio, Corsica, France
Article number116
Subjectmagic wear rate; rolling contact fatigue; rail grinding
AbstractThe magic wear rate (MWR) is the rate of wear at which any rolling contact fatigue cracks that are in initial stages of development are removed either by natural or a combination of natural and artificial wear. It is a simple concept which recognizes that when there is little or no wear, the rail will usually fail as a result of contact fatigue, but when there is excessive wear, the life is unnecessarily wasted. The concept has direct application to rail maintenance practices, in particular rail grinding. This paper details the basic theory of the magic wear rate and includes a discussion about the impact of various influencing factors including wheel load, friction, track curvature and metallurgy. Application is made chiefly to rail grinding, although it is acknowledged that the principle also extends to wheel wear. Examples of current practices are given and a new approach to rail grinding is presented that would better target the magic wear rate.
Publication date
PublisherComputational and Technology Resources
AffiliationNational Research Council Canada; Automotive and Surface Transportation; NRC Centre for Surface Transportation Technology
Peer reviewedYes
NPARC number23000156
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Record identifieraf279b2d-0658-4767-b4ad-de8d98b9b6ca
Record created2016-06-14
Record modified2016-06-14
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