On the special angle of surface cracks propagation in the railway rail heads

Datsyshyn, O. P.; Marchenko, H. P.; Glazov, A.Yu.

doi:10.1016/j.engfracmech.2018.12.017

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…Other works, such as the one developed by Markine et al [23], deal with the track properties to combat RCF. A detailed study of stress intensity factors (SIF) allows considering the effects of the pressurization of lubricating fluid [24] and the angle of surface cracks [25]. Different methodologies assessing RCF were developed considering wear mechanism.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Rolling Contact Fatigue Behavior in Rails Using Crack Initiation and Growth Models along with Multibody Simulations

et al. 2021

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Rolling contact fatigue (RCF) is a common cause of rail failure due to repeated stresses at the wheel-rail contact. This phenomenon is a real problem that greatly affects the safety of train operation. Preventive and corrective maintenance tasks have a big impact on the Life Cycle Cost (LCC) of railway assets, and therefore cutting-edge strategies based on predictive functionalities are needed to reduce it. A methodology based on physical models is proposed to predict the degradation of railway tracks due to RCF. This work merges a crack initiation and a crack growth model along with a fully nonlinear multibody model. From a multibody assessment of the vehicle-track interaction, an energy dissipation method is used to identify points where cracks are expected to appear. At these points, crack propagation is calculated considering the contact conditions as a function of crack depth. The proposed methodology has been validated with field measurements, conducted using Eddy Currents provided by the infrastructure manager Network Rail. Validation results show that RCF behavior can be predicted for track sections with different characteristics without the necessity of previous on-track measurements.

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Section: Introductionmentioning

confidence: 99%

Prediction of Rolling Contact Fatigue Behavior in Rails Using Crack Initiation and Growth Models along with Multibody Simulations

et al. 2021

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“…In the areas of the sharp crack edges a concentration of stresses can appear, consequently the crack will be developing in this direction rather quickly. The value of stresses in areas of concentration can exceed the yield strength, so the rail can be broken down soon [5,6]. Residual stresses appear within the processes of production, welding and installation [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Strain Stress Model of the Rail with Crack in its Head and Estimation of its Operational Lifetime

Муравьев

Tapkov

Volkova

et al. 2019

MSF

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The most common reason of the fatigue crack appearance is the presence of stresses in the rail. The process of stress strain state simulation for the R65 rail is presented in the paper. Values of residual stresses were modeled and chosen to be maximum allowed by GOST (State Standard): -77 MPa in the rail head, -125 MPa in the web and 106 MPa in rail foot. These stresses match the value-77 MPa measured by the acoustoelastic method from the center of the rolling surface of the rail. The influence of the crack at the highest level of the stress strain state was studied in cases of the maximum train load and its absence. According to results of modeling, stresses in the sharp edge of the crack can exceed the lowest acceptable by GOST (State Standard) value of the yield strength by more than 5 times in case of the presence of the train load. In case of the absence of the train load, the crack does not have a significant influence on the stress strain state. The modelling process was also used to study the influence of the installation temperature difference on the operational lifetime of the rail. The paper presents the description of the influence between the installation temperature difference and the crack initiation. According to modeling results and the rail defect catalogue, rails with the lowest acceptable mechanical characteristics are prohibited to be used after 300∙109 kg and higher tonnage.

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Contact Lifetime Estimation Methods for Tribojoint Elements. A Survey

Datsyshyn

Panasyuk

2019

Structural Integrity

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On the special angle of surface cracks propagation in the railway rail heads

Cited by 9 publications

References 21 publications

Prediction of Rolling Contact Fatigue Behavior in Rails Using Crack Initiation and Growth Models along with Multibody Simulations

Prediction of Rolling Contact Fatigue Behavior in Rails Using Crack Initiation and Growth Models along with Multibody Simulations

Strain Stress Model of the Rail with Crack in its Head and Estimation of its Operational Lifetime

Contact Lifetime Estimation Methods for Tribojoint Elements. A Survey

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