"Does god play dice with corrugations?": environmental effects on growth

Meehan, P. A., Bellette, P. A. and Horwood, R. J. (2013) "Does god play dice with corrugations?": environmental effects on growth. Wear, 314 1-2: 254-260. doi:10.1016/j.wear.2013.11.027

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Author Meehan, P. A.
Bellette, P. A.
Horwood, R. J.
Title "Does god play dice with corrugations?": environmental effects on growth
Journal name Wear   Check publisher's open access policy
ISSN 0043-1648
Publication date 2013-12-02
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.wear.2013.11.027
Open Access Status
Volume 314
Issue 1-2
Start page 254
End page 260
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
 Corrugation growth has perplexed many researchers for several decades with remaining challenges including its reliable prediction in the field. In the present paper, the effect of environmental variations on corrugation growth is investigated using field measurements and mechanics-based modelling. Statistically significant relationships between average daily rainfall, humidity and the growth of rail corrugation were investigated using meterological and railway site field monitoring of a metropolitan network test site with a recurring rail corrugation of about 95 mm wavelength. Corrugation growth rate (Gr) was determined by systematically measuring the longitudinal rail profile with a Corrugation Analysis Trolley (CAT) on the 240 m radius, narrow gauge, concrete-sleepered curve. Both roughness generated and weld initiated profile growths were investigated. The weather data was obtained from records held by the Bureau of Meteorology. The modelling is developed to provide insight and mechanics based analysis of the field corrugation growth under changes in environmental conditions and vehicle speed variability. Results show a strong correlation between variations in rainfall and corrugation growth that is consistent with changes in steady state wear. Changes in contact patch geometry and the damage mechanism as the corrugation amplitude grows are shown to have substantial but slower effects on growth. The results are used to explain observed changes in corrugation growth rate under variable speed control at the same site.
Keyword Rolling contact mechanics
Wear modelling
Environmental effects
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 2 December 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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Created: Wed, 05 Mar 2014, 12:43:39 EST by Alex Fitzgerald on behalf of School of Mechanical and Mining Engineering