Reduction of vibrations and noise generation by resilient wheels of light rail systems is achieved by inserting of rubber segments between wheel rims and wheel disks. This assembly effectively reduces vibration level of wagons and rolling noise when compared to the conventional solid wheels [1]. The beneficial effect of resilient wheels depends on design parameters namely on radial dynamic stiffness and damping loss factor of rubber [2]. Simultaneously, the problem of endurance of this assembly appears. Mechanical loading of rubber segments in a wheel consists of a pre-load compressive stress resulting from the wheel assembly and from cyclic stresses due to an axle load and wheel rotation. Further components of cyclic load originate from a wheel/rail interaction and traction forces. The high-cycle fatigue behaviour of rubber, particularly the cyclic sagging is decisive for the lifetime of resilient wheels. The aim of this paper is to present an experimental procedure suitable for the experimental determination of the high-cycle fatigue properties of rubber segments and to present results characterizing their high-cycle fatigue behaviour.
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