Abstract
The paper presents a general concept for fatigue strength assessment in rolling contact between track roller and rail. The multi-axial stress state is analysed using the critical plane method. Depending on the orientation of the section plane, different load cycle combinations result with different stress-amplitude and mean-stress combinations. The Haigh diagram outlines the fatigue strength of the material. The load cycles in all section planes are plotted there and the safety factor can be determined directly. In comparison to other empirical concepts, similar values are obtained for the allowable maximum contact pressure. The advantage of this method is its general applicability, without any restrictions regarding the geometry or material.
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