Szukana fraza: [Abstrakt = "In the paper the variability of stresses \(and corresponding longitudinal forces\) observed in continuous welded rail \(CWR\) during service were described. The main sources of stresses are rail temperature changes, train\/track interaction and residual stresses resulted from the manufacturing process. A knowledge of stress distribution in rails is very important for CWR track safety assessment in service and essential for understanding the rail defects development. The different methods of stress \(longitudinal forces\) measurements in rails were also presented"]

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