Computer modeling of processes of wear and accumulation of rolling contact fatigue damage in railway wheels using combined criterion

Sakalo, Vladimir; Sakalo, A.; Rodikov, Alexander; Tomashevskiy, S.

doi:10.1016/j.wear.2019.05.015

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…The rate qðzÞ of damage accumulation at the depth z is often considered depending on the selected criterion of strength of material, for example, the amplitude values of the principal shear stress Δτ max ðzÞ. 22 The function τ max ðx, y, zÞ is determined by the following formula τ max ðx, y, zÞ ¼ 1 2 ðσ 1 ðx, y, zÞ À σ 3 ðx, y, zÞÞ,…”

Section: Damage Function Calculationmentioning

confidence: 99%

“…The amplitude values of the principal shear stress Δτ max ðzÞ at the fixed depth z 0 are defined as the difference between their largest and smallest values in the cross-section by the plane z ¼ z 0 , parallel to the surface of the half-space. Note, that in the engineering models of rolling contact fatigue, [22][23][24] the fatigue initiation criteria are often based on the equivalent von Mises stress…”

Section: Damage Function Calculationmentioning

confidence: 99%

“…The contact normal and shear stress distributions, calculated taking into account the layer's compliance in normal direction and neglecting it (Figures 3-5), were used to analyze the effect of the layer's normal compliance on the principal shear stress amplitudes (equation (22)) which arise at the plane y ¼ 0: The corresponding dependences are presented in Figure 7 for different values of the dimensionless parameter β τ .…”

Section: Principal Shear Stress Amplitude Analysismentioning

confidence: 99%

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Modelling of rolling contact fatigue under various interface conditions

Goryacheva

Meshcheryakova

2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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This study presents the results of modelling the rolling contact of the elastic sphere and the elastic half-space in the presence of a thin intermediate viscoelastic layer which properties are described by an elastic nonlinear Winkler body in the normal direction and a viscoelastic Maxwell body in the tangential direction. The analytical–numerical approach for the estimation of contact fatigue damage, accumulated in the elastic half-space under rolling friction conditions, is developed. The proposed model can be used, in particular, to study the effect of mechanical properties of the friction modifiers (elastic moduli and relaxation times) and its thickness as well as the relative slippage on the formation of the surface and under surface contact fatigue cracks in rails. The results of the analysis can also be applied for the estimation of efficiency of solid lubricants in rolling contacts under given operating conditions.

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Section: Damage Function Calculationmentioning

confidence: 99%

Section: Damage Function Calculationmentioning

confidence: 99%

Section: Principal Shear Stress Amplitude Analysismentioning

confidence: 99%

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Modelling of rolling contact fatigue under various interface conditions

Goryacheva

Meshcheryakova

2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…When the elastic hysteresis loss coefficient α is introduced (Sakalo et al , 2019), due to the elastic hysteresis, the resistance torque during rolling can be expressed as: …”

Section: Modeling Ideamentioning

confidence: 99%

Analysis of assembly defects in the cam curved groove mechanism

Lan

Fan

2020

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Purpose This paper aims to propose an elementary approach toward the identification of assembly defects of a cam curved groove mechanism. Design/methodology/approach A numerical analysis method for identifying the assembly defects of the cam curved groove mechanism is proposed by resorting to Hertz contact theory. A general mathematical model is established to analyze the kinematic and dynamic characteristics with an interference fit between the main roller and cam curved groove, including the contact points of the external and internal ring. Findings The analysis method of the contact point characteristics of the cam curved groove mechanism is given in this paper, and the kinematic and dynamic characteristics of the main roller can be analyzed. The numerical examples presented in this paper are implemented in MATLAB, feasibility and validity of the above algorithm are verified by the finite element method. Originality/value Regarding the defects of the interference fit, the findings of this paper can serve as a reference for researchers in reducing the defects in the design process of the cam mechanism.

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“…Both the experience 15,16 and laboratory experiments 17,18 showed the detrimental effect of such environmental factor on the fatigue life. The damage in condition of elastic shakedown (e.g., with no cyclic plastic strain) is usually approached in terms of multiaxial fatigue 19,20 or crack propagation 21,22 . The former approach considers fatigue strength an intrinsic material property, neglecting the effect of pre‐existing cracks or defects; the latter presumes the pre‐existence of a crack, which can propagate or not under the applied load.…”

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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Computer modeling of processes of wear and accumulation of rolling contact fatigue damage in railway wheels using combined criterion

Cited by 9 publications

References 9 publications

Modelling of rolling contact fatigue under various interface conditions

Modelling of rolling contact fatigue under various interface conditions

Analysis of assembly defects in the cam curved groove mechanism

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

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