Abstract
Abstract This work is concerned with subcritical crack growth in rail-end bolt hole caused by fatigue. Included in the analysis are the mechanical wheel loads and thermal fluctuations experienced by the rail. The interaction of cyclic loading with the rail geometry is considered to be essential. Finite element stress analysis is coupled with the strain energy density criterion for determining the subcritical crack growth steps. The crack can grow and follow any arbitrary surface in the three-dimensional space depending on the symmetry or antisymmetry conditions of the load and geometry. Results on crack shapes and growth rates compare favorably with those observed experimentally.
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