Abstract
While many railway engineers are exploring the benefits of the latest lubrication technologies, bogie types and metallurgies, the wheel/rail (w/r) contact mechanics are often overlooked or poorly controlled. But the geometry of the w/r contact permeates every facet of the w/r interaction, having profound effects on wear, fatigue, corrugation, stability and derailment potential. A pummelling model is being developed at the NRC Centre for Surface Transportation Technology to quantify the performance of rail profiles when loaded by a large number of measured new and worn wheels. Typical results are shown for the RE136-10″, UIC60 and RE141 rail profiles. Contact mechanics principles are further applied in a discussion of several aspects of rail grinding, including surface roughness, facet width and rail grinding interval.
Published Version
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