For this, we applied the criterion of the elastic plastic fracture mechanics, the J-integral method.
Mathematical models describing crack propagation are proposed. Then, a two-dimensional model of finite elements of the plane deformation was developed to simulate the dynamic characteristics of the white layer cracking. The object of study (rail surface after operation) was examined under a microscope. The paper presents the study results of the morphological characteristics of the white layer on the rail surface. This is due to tensile and shear stresses on the surface of the wheel-rail contact spot.
Cracks are detected in the white layer of rail steel after one thousand test cycles. The paper is devoted to the evaluation of cracking of white layers formed on the surface of the rail while in operation.
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