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Rolling contact fat...
Rolling contact fatigue assessment of repair rail welds
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- Kabo, Elena, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ekberg, Anders, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Maglio, Michele, 1993 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2019
- 2019
- Engelska.
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Ingår i: Wear. - : Elsevier BV. - 0043-1648. ; 436-437
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Abstract
Ämnesord
Stäng
- A repair welding procedure is numerically simulated. To validate the numerical model, analyses of the temperature evolution in a repaired rail are compared to existing full-scale test results. Thermomechanical simulations are carried out to evaluate the residual stress formation during welding and how the residual stress field is influenced by subsequent wheel passages during operations. The risk of rolling contact fatigue (RCF) is analysed and results discussed. It is found that tensile stress magnitudes resulting from welding decrease substantially during rolling contact loading. The influence of the residual stresses on RCF is found to be minor on the surface and somewhat more severe in a layer at the bottom of the repair weld. In addition to residual stresses, there is also a risk that welding introduces material defects and alters material properties. The influence of these factors on the risk of RCF is discussed.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- FE simulations
- Residual stresses
- Stress redistribution
- Rolling contact fatigue
- Rail repair welding
- Thermomechanical analysis
Publikations- och innehållstyp
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- ref (ämneskategori)
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