The influence of rail surface irregularities on contact forces and local stresses
Journal article, 2014

The effect of initial rail surface irregularities on promoting further surface degradation is investi- gated. The study concerns rolling contact fatigue formation, in particular in the form of the so-called squats. The impact of surface irregularities in the form of dimples is quantified by peak magnitudes of dynamic contact stresses and contact forces. To this end simulations of two-dimensional (later extended to three-dimensional) vertical dynamic vehicle–track interaction are employed. The most influencing parameters are identified. It is shown that even very shallow dimples might have a large impact on local contact stresses. Peak magnitudes of contact forces and stresses due to the influence of rail dimples are shown to exceed those due to rail corrugation.

RCF

squats

rail surface irregularities

rail corrugation

Author

Robin Andersson

Chalmers, Applied Mechanics, Material and Computational Mechanics

Peter Torstensson

Dynamics

Elena Kabo

Chalmers, Applied Mechanics, Material and Computational Mechanics

Fredrik Larsson

Chalmers, Applied Mechanics, Material and Computational Mechanics

Vehicle System Dynamics

0042-3114 (ISSN)

Vol. 53 1 68-87

Subject Categories

Tribology

Computational Mathematics

Vehicle Engineering

Areas of Advance

Transport

DOI

10.1080/00423114.2014.982890

More information

Created

10/7/2017