Rolling contact fatigue analysis of rails inculding numerical simulations of the rail manufacturing process and repeated wheel-rail contact loads

Ringsberg, Jonas W.; Lindbäck, Torbjörn

doi:10.1016/s0142-1123(02)00147-0

Cited by 71 publications

(64 citation statements)

References 15 publications

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“…J is a load and material-dependent parameter, equal to 0.25 for bainitic alloy or 0.3 manganese steel. Here, to illustrate that is a material constant, we use 0.2 to take the place of J (Ringsberg and Lindbäck, 2003). Figure 10 shows the contour plot of maximum fatigue parameter under different material plane.…”

Section: Critical Plane Approachmentioning

confidence: 99%

Rail surface crack initiation analysis using multi-scale coupling approach

Ma¹,

Markine²,

Mashal³

2016

The Dynamics of Vehicles on Roads and Tracks

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Section: Critical Plane Approachmentioning

confidence: 99%

Rail surface crack initiation analysis using multi-scale coupling approach

Ma¹,

Markine²,

Mashal³

2016

The Dynamics of Vehicles on Roads and Tracks

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“…Elastoplastic calculations of stresses and deformations in rails are often performed using contact stresses that have been obtained from elastic calculations, see [30], [31] and [32]. In [33] contact stresses on the railhead and in the rail gauge corner are evaluated using Hertzian contact, the CONTACT software and an elastoplastic FE model.…”

Section: Elastoplastic Contactsmentioning

confidence: 99%

“…After straightening there are tensile residual stresses in the head and in the centre of the foot and compressive residual stresses in the web and at the foot ends, see, e.g. [43][44][45][46][47]. After a few wheel passages the residual stresses in the surface layer of the rail head change to compressive stresses due to plastic deformation ( Figure 21) to a depth of 4 to 10 mm [48] (see also [47,50].…”

Section: Residual Stressesmentioning

confidence: 99%

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Introduction to the damage tolerance behaviour of railway rails – a review

Zerbst¹,

Lundén

Edel

et al. 2009

Engineering Fracture Mechanics

174

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Despite substantial advantages in material development and in periodic non-destructive inspection together with periodic grinding and other measures in order to guarantee safe service, fatigue crack propagation and fracture is still in great demand as emphasised by the present special issue. Rails, as the heart of the railway system, are subjected to very high service loads and harsh environmental conditions. Since any potential rail breakage includes the risk of catastrophic derailment of vehicles, it is of paramount interest to avoid such a scenario. The aim of the present paper is to introduce the most important questions regarding crack propagation and fracture of rails. These include the loading conditions: contact forces from the wheel and thermal stresses due to restrained elongation of continuously welded rails together with residual stresses from manufacturing and welding in the field, which is discussed in Section 2. Section 3 provides an overview of crack-type rail defects and potential failure scenarios. Finally the stages of crack propagation from initiation up to final breakage are discussed.

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“…Furthermore, it has been reported by many authors that residual stresses influence the mechanical behaviour of structural material and, consequently, lead to the propagation of cracks in the case of rails [2][3][4][5][6][7] . Residual stresses in rails can cause plastic deformation around the rail-wheel contact surface and modify the stress field near the running line and internally in the railhead causing railway failures [8] .…”

Section: Introductionmentioning

confidence: 99%

Analysis of rail cooling strategies through numerical simulation with instant calculation of thermal expansion coefficient

et al. 2010

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This article describes a new methodology to simulate the cooling process for an asymmetrical Ri60 grooved rail, designed for city tramways, in a more realistic manner than that conducted previously by other authors for long steel sections. The approach considers the phase transformation of the steel and the forced convection cooling. The process is modelled as an uncoupled thermo-mechanical problem. First, the rail's temperature history is obtained from a computer fluid dynamic model and subsequently introduced in the finite element model, in order to model the stresses and displacements. This second stage involves the calculation of the thermal expansion coefficient, for each element and at each iteration. The calculation is made according to the continuous cooling transformation diagram. These results lead to the extremely reliable determination of residual stresses as proved by the comparison with experimental data obtained in the industrial plant. The methodology allows for an accurate study of two types of cooling strategies for the Ri60 and the selection of the more suitable one. KeywordsResidual stresses; Section manufacturing; Thermal expansion coefficient. Análisis de estrategias de enfriamiento de raíles mediante simulación numérica con cálculo instantáneo del coeficiente de expansión térmica ResumenEn este artículo se describe una nueva metodología para simular el proceso de enfriamiento de un rail asimétrico Ri60, diseñado para tranvías, de una forma mucho más realista que lo realizado hasta ahora para perfiles largos de acero. La propuesta considera los efectos de la transformación de fases del acero y el enfriamiento por convección forzada. El proceso es simulado como un proceso termo-mecánico desacoplado. Primero, las curvas de enfriamiento del rail son obtenidas a partir de un modelo basado en dinámica de fluidos computacional y posteriormente introducidas en el modelo de elementos finitos para calcular las tensiones y desplazamientos. En esta segunda fase se calcula, para cada elemento finito y en cada iteración, el coeficiente de dilatación térmica lineal según el diagrama de curvas de enfriamiento continuo. Estos resultados permiten determinar las tensiones residuales al final del proceso con muy buena fidelidad respecto a los datos experimentales obtenidos en la planta industrial. La metodología permite estudiar con precisión dos tipos de estrategias de enfriamiento del Ri60 y seleccionar la más conveniente. Palabras claveTensiones residuales; Fabricación de perfiles; Coeficiente de dilatación térmica lineal.

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Rolling contact fatigue analysis of rails inculding numerical simulations of the rail manufacturing process and repeated wheel-rail contact loads

Cited by 71 publications

References 15 publications

Rail surface crack initiation analysis using multi-scale coupling approach

Rail surface crack initiation analysis using multi-scale coupling approach

Introduction to the damage tolerance behaviour of railway rails – a review

Analysis of rail cooling strategies through numerical simulation with instant calculation of thermal expansion coefficient

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