Numerical Analysis of 3D Cracks Propagating in the Rail-Wheel Contact Zone

Olzak, M.; Stupnicki, Jacek; Wójcik, R.

doi:10.1007/978-94-015-8151-6_31

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…n all the cases that have been investigated so far, with no liquid present in the crack, the amplitude of K II changes (KII ) dominates, while the value of KI remains low exerting only a weak influence on the fatigue crack propagation [2][3][4][5]. The liquid presence in the crack causes a substantial growth of KI value, despite the model considered.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, both the wheel and rail have been modelled as finite, linear elastic solid bodies. The Authors used a unique algorithm that employs the flexibility matrices of the bodies in contact, which were determined using FEM [3]. The algorithm employed allows for solving 2D and 3D problems of the wheel-rail contact taking into account the contact between the crack faces well as introducing many other phenomena, like pressure of the liquid filling the crack, wheel loads acting upon the contact zone, thermal loads, residual stresses in the rail, rail bending, variable friction coefficients over the contact surface and different types of the crack faces interaction [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack

Olzak

Piechna

Pyrzanowski

2017

Frattura Ed Integrità Strutturale

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Numerical investigations of the propagation of rolling contact fatigue crack filled by the liquid have been conducted. Two models of fluidcrack interaction have been considered. In the first model called "hydrostatic" the assumption of incompressible, inviscid and weightless liquid was accepted. It was also assumed that due to the wheel load the trapped liquid could not get outside the crack and its volume remained constant until the rising pressure would open up the crack mouth again. On this assumption the analysis has a steady-state character. In the second model it has been assumed that the crack is filled by the viscous, incompressible fluid and the fluid motion as well as the resulting pressure distribution can be represented by one-dimensional form of the Reynolds equation. The method for solving the problem of the coupled motion of liquid and crack faces has been developed and series of calculation were made. The method has been employed for the predicting of crack deformation in the course of wheel rolling. Citation: Olzak, M., Piechna, J., Pyrzanowski, P., Numerical analysis of the influence of liquid on propagation of a rolling contact fatique crack, Frattura ed Integrità Strutturale, 42 (2017) 46-55.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack

Olzak

Piechna

Pyrzanowski

2017

Frattura Ed Integrità Strutturale

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Simulating fatigue crack growth in spiral bevel gears

Spievak

Wawrzynek

Ingraffea

et al. 2001

Engineering Fracture Mechanics

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Numerical Investigation on Wheel-Rail Dynamic Vibration Excited by Rail Spalling in High-Speed Railway

Wang

Zhai

et al. 2016

Shock and Vibration

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Spalling in contact surface of rail is a typical form of rolling contact fatigue, which is a difficult problem to solve in railway. Once the spalling occurs in the rail, the wheel-rail dynamic interaction will become more severe. The wheel-rail dynamic interaction is investigated based on the theory of vehicle-track coupled dynamics in this paper, where the excitation modes of the rail spalling failure are taken into consideration for high-speed wheel-rail system. A modified excitation model of rail spalling failure is proposed. It can enable the investigations on two kinds of excitation modes in wheel-rail system due to the rail spalling, including the pulse and the harmonic excitation modes. The excitation mode can be determined by the ratio of the spalling length to its critical length. Thus, the characteristics of wheel-rail dynamic vibration excited by two kinds of excitation are simulated in detail. Consequently, the limited value of the spalling length is suggested for high-speed railway.

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Numerical Analysis of 3D Cracks Propagating in the Rail-Wheel Contact Zone

Cited by 3 publications

References 6 publications

Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack

Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack

Simulating fatigue crack growth in spiral bevel gears

Numerical Investigation on Wheel-Rail Dynamic Vibration Excited by Rail Spalling in High-Speed Railway

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