A methodology to predict thermomechanical cracking of railway wheel treads: From experiments to numerical predictions

Esmaeili, Ali; Walia, Mandeep Singh; Handa, Kazuyuki; Ikeuchi, Katsuyoshi; Ekh, Magnus; Vernersson, Tore V; Ahlström, Johan

doi:10.1016/j.ijfatigue.2017.08.003

Cited by 24 publications

(8 citation statements)

References 30 publications

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“…Esmaeili et al [20] presented a comprehensive methodology to predict cracking and estimate the lifespan of railway wheel which is subject to thermomechanical load related to braking and rolling contact (this study is a further development of the work presented in [9]). In general, three braking cases were analysed in the study, namely stop brake applications from the initial velocity of 160 km/h and 130 km/h with sintered brake shoe and stop brake application from 160 km/h with composite organic brake shoe.…”

Section: Temperature Calculations In Railway Tread Brakementioning

confidence: 94%

Frictional Heating in Railway Brakes: A Review of Numerical Models

Wasilewski

2018

Arch Computat Methods Eng

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In the design process of a railway vehicle it is crucial to determine the operating temperature of the brake friction elements. The thermal load related to braking depends on both the design of the vehicle and its braking system but also on the operating conditions in service. It is therefore justified to model frictional heating of the friction elements in the design phase. As railway braking differs substantially from automotive or aircraft braking, current review article is focused on the published literature concerning specifically modelling of railway tread and disc brakes. However, to present the complete picture of the state-of-the-art, studies undertaking related topics concerning frictional heating are also discussed. It is concluded that the existing models should be further developed to account for mutual coupling of operation conditions and the coefficient of friction.

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Section: Temperature Calculations In Railway Tread Brakementioning

confidence: 94%

Frictional Heating in Railway Brakes: A Review of Numerical Models

Wasilewski

2018

Arch Computat Methods Eng

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“…Isotropic hardening will be neglected here, since it is known to be insignificant in pearlitic steels [26]. Hence, no evolution equation is introduced for the drag stress D.…”

Section: Flow Rule and Kinematic Hardeningmentioning

confidence: 99%

“…Only a few studies have so far been devoted to modeling the cyclic, time-and temperature-dependent behavior of pearlitic steels [25,26]. In [25], a model is presented to describe temperature-dependent creep and stress relaxation of pearlitic steels at finite strains.…”

Section: Introductionmentioning

confidence: 99%

“…It, however, cannot properly describe the cyclic behavior since it includes isotropic hardening only, which does not account for the presence of back-stress effects emerging from the ferrite-cementite deformation incompatibilities in pearlite [20]. The model presented in [26] takes into account temperature effects and kinematic hardening, however, time-dependent effects are not addressed. Motivated by the literature, a new model will be presented here to describe the cyclic, thermal and time-dependent (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Scale Modeling of the Thermo-Mechanical Behavior of Cast Iron

Mohammadpour

Geers

Kouznetsova

2022

Multiscale Sci. Eng.

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This work presents a multi-scale modelling framework for thermo-mechanical behaviour of Compacted Graphite Iron cast iron. A general thermo-elasto-visco-plastic model is developed to describe the matrix (pearlite) behavior under thermo-mechanical cyclic loading, for which the parameters are identified from tests on pearlitic steel. The pearlite model takes into account the temperature dependent rate-dependency and kinematic hardening. The importance of properly accounting for the graphite anisotropy is emphasised, for which a numerical procedure for estimating the local anisotropy directions from the graphite particle geometry and experimental observations is proposed. A high quality conforming finite element mesh is generated on a representative volume element using discrete voxelized microstructural data in combination with signed distance functions from the interfaces. For fully constraint thermal cyclic loading conditions with different holding times, the capabilities of the developed multi-scale model are demonstrated at both scales: the macroscale, where the simulation results are in very good agreement with the experimental data, and the microscale, providing the evolution of local fields.

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“…Many models were proposed to predict the plastic strain accumulation, mainly based on the critical strain approach 10 : Starting from the calculation of the plastic strain increment at each load cycle, they assume that a crack will be generated once the accumulative plastic strain will reach a critical value, which is a property of the material. Examples of application of such models, taking into account the wheel‐rail contact and/or the wheel‐brake block contact, can be found in previous studies 11–13 …”

Section: Introductionmentioning

confidence: 99%

Application of the Failure Assessment Diagram approach for contact fatigue damage evaluation in railway wheel steels

Donzella

Danesi

Mazzù

et al. 2021

Fatigue Fract Eng Mat Struct

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A Failure Assessment Diagram (FAD), developed for rolling contact, was specifically formulated for railway wheel steels. The FAD allows combining a multiaxial fatigue criterion with the linear elastic fracture mechanics concept; in particular, it was used to assess the fatigue failure in wet contact, related to the pressurization of the fluid entrapped in surface cracks. The approach was applied to the results of previous bi‐disc tests carried out on three railway wheel steels, subjected first to a dry rolling‐sliding contact step, then to a wet contact step. The crack size distribution after the dry contact step was evaluated by a statistical approach; subsequently, the stress intensity factor during the wet contact step was estimated by finite elements. The results of the FAD agreed with the damage observed on the cross section of the specimens at the end of the tests. Furthermore, the FAD was used to determine the maximum allowable crack to prevent rolling contact fatigue, this way showing its potential as a damage tolerant approach.

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A methodology to predict thermomechanical cracking of railway wheel treads: From experiments to numerical predictions

Cited by 24 publications

References 30 publications

Frictional Heating in Railway Brakes: A Review of Numerical Models

Frictional Heating in Railway Brakes: A Review of Numerical Models

Multi-Scale Modeling of the Thermo-Mechanical Behavior of Cast Iron

Application of the Failure Assessment Diagram approach for contact fatigue damage evaluation in railway wheel steels

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