Anisotropy and rolling contact fatigue of railway wheels

Ekberg, Anders; Sotkovszki, Peter

doi:10.1016/s0142-1123(00)00070-0

Cited by 89 publications

(62 citation statements)

References 12 publications

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“…A similar effect is also studied in the fatigue of metals (Ekberg 2000, Papadopoulos 1994. As already mentioned, the in-phase (IP) cycles satisfy (5), whereas the out-of-phase (OOP) cycles do not, for example an OOP strain cycle can be given by the function…”

Section: Out-of-phase Cyclesmentioning

confidence: 88%

Explicit accumulation model for cyclic loading

Niemunis¹,

Wichtmann²

2004

Cyclic Behaviour of Soils and Liquefaction Phenomena

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The essential elements of an explicit model for the accumulation of strain due to cyclic loading are presented. This publication is closely related to the information in two companion papers by Wichtmann et al. (2004b,c). Actually the presented model comprises most of the experimental data given in the above mentioned companion papers. Remarks on the FE implementation and an example of a FE analysis of a strip foundation under cyclic axial load are enclosed.

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Section: Out-of-phase Cyclesmentioning

confidence: 88%

Explicit accumulation model for cyclic loading

Niemunis¹,

Wichtmann²

2004

Cyclic Behaviour of Soils and Liquefaction Phenomena

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“…According to the authors of [20,21], the prediction of surface initiated RCF is in direct relation to the wheel-rail rolling contact behavior, e.g., the normal and tangential wheel-rail contact stresses, wheel-rail contact patch positions and shapes etc. In this section, firstly, the prediction model of surface initiated RCF based on the Shakedown theory is introduced.…”

Section: Simulation Of Rail Surface Initiated Rcfmentioning

confidence: 99%

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Wang

et al. 2018

Applied Sciences

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Surface initiated rolling contact fatigue (RCF), mainly characterized by cracks and material stripping, is a common type of damage to turnout rails, which can not only shorten service life of turnout but also lead to poor running safety of vehicle. The rail surface initiated RCF of turnouts is caused by a long-term accumulation, the size and distribution of which are related to the dynamic parameters of the complicated vehicle-turnout system. In order to simulate the accumulation of rail damage, some random samples of dynamic parameters significantly influencing it should be input. Based on the three-level unreplicated saturated factorial design, according to the evaluation methods of H, P and B statistic values, six dynamic parameters that influence the rail surface initiated RCF in turnouts, namely running speed of vehicle, axle load, wheel-rail profiles, integral vertical track stiffness and wheel-rail friction coefficient, are obtained by selecting 13 dynamic parameters significantly influencing the dynamic vehicle-turnout interaction as the analysis factors, considering four dynamic response results, i.e., the normal wheel-rail contact force, longitudinal creep force, lateral creep force and wheel-rail contact patch area as the observed parameters. In addition, the rail surface initiated RCF behavior in turnouts under different wheel-rail creep conditions is analyzed, considering the relative motion of stock/switch rails. The results show that the rail surface initiated RCF is mainly caused by the tangential stress being high under small creep conditions, the normal and tangential stresses being high under large creep conditions, and the normal stress being high under pure spin creep conditions.

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“…A fatigue limit is assumed to occur if and only if the initially plastically deforming grains recover an elastic response after cycling. Ekberg and Sotkovski [17] proposed to account for anisotropic fatigue behaviour by extending the Dang Van criterion [4]. Cano et al [16] proposed an anisotropic extension for high cycle fatigue criteria based on a two scale approach involving a macro-meso passage.…”

Section: Review Of Different Anisotropic Fatigue Criteriamentioning

confidence: 99%

Modelling the role of non-metallic inclusions on the anisotropic fatigue behaviour of forged steel

Pessard

Morel

et al. 2011

International Journal of Fatigue

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractForged components are known to show high cyclic and monotonic mechanical properties. This is mainly due to a better compactness and a finer microstructure introduced by the forming process. However, this good mechanical behaviour is sometimes a source of anisotropy especially when the microstructural heterogeneities are not randomly distributed and/or oriented. This study aims at describing the high cycle fatigue response of a forged bainitic steel. This material contains a lot of elongated manganese sulphide (MnS) inclusions, oriented as a function of the rolling or forging direction. Specimens with different orientations relative to the rolling direction are tested in fatigue under push-pull uniaxial and torsion loads.The influence of "inclusion clusters" is clearly demonstrated via the observation of the failure surfaces. Experiments show that the anisotropic fatigue behaviour is due to a change in the crack initiation mechanism. At 0°, when the inclusions are parallel to the applied stress, micro-crack initiation is controlled by the material matrix. At 45° and 90°, elongated manganese-sulfide inclusion clusters are the origin of crack initiation and the fatigue strength drops significantly.A statistical approach based on the competition between two different crack initiation mechanisms is proposed. One mechanism is modelled by local elastic shakedown concepts and the other by linear elastic fracture mechanics. This approach leads to a Kitagawa type diagram and explains the anisotropy in the material. The approach developed in this study demonstrates a framework using both the elastic shakedown concept and the weakest link theory to account for the loading mode, loading path and data scatter in High Cycle Fatigue.

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Anisotropy and rolling contact fatigue of railway wheels

Cited by 89 publications

References 12 publications

Explicit accumulation model for cyclic loading

Explicit accumulation model for cyclic loading

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Modelling the role of non-metallic inclusions on the anisotropic fatigue behaviour of forged steel

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