Abstract:The alternation of dry and wet contact can cause severe damage on railway wheels, because ratcheting occurring in dry contact leads to the formation of surface cracks, which can propagate if water is subsequently added, owing to the entrapped fluid pressurization mechanism. In a previous work, damage in alternated dry-wet contact was studied by means of twin-disc tests, aided by an innovative vision system including two devices: one for assessing the surface status by elaborating lights and shadows due to a di… Show more
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