This paper addresses the lifetime of head-hardened steel rails used in the Vienna metro system. Metro steel rails are subjected to a variety of stresses such as stresses due to rolling contact, thermal stresses due to changing climatic seasonal conditions, residual stresses due to rail manufacturing and straightening and occasionally bending stresses due to improper bedding of the rails. These stresses are responsible for the magnitude of the fracture mechanics related R-value. It is shown that residual stresses and bending stresses can be made responsible for a dramatic increase of the stress variation and the number of cycles. Examples from the Vienna subway lines, Wiener Linien, will be presented.
The effect of the R-value on the lifetime of cracked head-hardened steel rails for subways
2012
16 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen
Conference paper
Storage medium
English
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