Abstract
Wide gage—a fatigue failure of the track to maintain the nominal lateral distance between rail heads—is one of several modes of track failure on which the AAR-FRA-RPI-TDA Track Train Dynamics Program has focused attention. To investigate the generation of wide gage on tangent track, experiments were conducted to measure track dynamic response and long-term fatigue life of track sections on the Union Pacific Rail-road in Idaho. Results of these experiments have defined the important factors in this mode of track fatigue.
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