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A field test study ...
A field test study of leaf contamination on railhead surfaces
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- Zhu, Yi (författare)
- KTH,Maskinkonstruktion (Avd.)
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- Olofsson, Ulf, 1962- (författare)
- KTH,Materialvetenskap
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- Nilsson, R. (författare)
- Stockholm Public Transport AB, Stockholm, Sweden
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KTH Maskinkonstruktion (Avd) (creator_code:org_t)
- Stirlingshire, UK : Civil-Comp Press, 2012
- 2012
- Engelska.
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Ingår i: Civil-Comp Proceedings. - Stirlingshire, UK : Civil-Comp Press. - 1759-3433. ; 98
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.4...
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Abstract
Ämnesord
Stäng
- Leaves on train tracks cause low adhesion between wheels and rails, especially in the autumn. A Stockholm local traffic track with a long history of adhesion problems was subject to field tests of railhead contamination. Over a year, on five occasions under different conditions, the friction coefficient was measured using a hand-push tribometer and rail samples were taken. ESCA and GD-OES analyses were conducted to determine the composition of the top layer of rail contaminants. The blackish layer contains much higher contents of calcium, carbon, and nitrogen than other samples indicating a chemical reaction occurring from the surface to a depth of several microns. The thickness of the friction-reducing oxide layer predicts the friction coefficient and leaf contamination extent.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- Blackish layer
- Chemical reaction
- Field test
- Friction coefficient
- Leaf
- Surface analysis
- Wheel/rail
- Adhesion
- Chemical analysis
- Chemical reactions
- Contamination
- Lunar surface analysis
- Rails
- Surface reactions
- Wheels
- Friction coefficients
- Friction
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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