Premature failures of railway axles after repeated pressing

Schmidová, Eva; Paščenko, Petr; Culek, Bohumil; Schmid, Michal

doi:10.1016/j.engfailanal.2021.105253

Cited by 15 publications

(4 citation statements)

References 22 publications

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“…Railway axles are critical components, and their design assessment procedure, as well as the maintenance program, require special attention. The design route must consider the deterioration of the axles during service that can be promoted by (i) surface damage from ballast impacts [1][2][3], (ii) pitting from corrosion [4], and (iii) surface scars in press-fits [5][6][7]. All these types of damages can lead to fatigue crack growth under a sufficient level of local cyclic stresses.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Fatigue Crack Growth in Full-Scale Railway Axles Subjected to Service Load Spectra: Experiments and Predictive Models

Pourheidar

Patriarca

Beretta

et al. 2021

Metals

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In this paper, a series of experimental investigations was performed on full-scale railway axles to analyze the fatigue crack growth behavior of EA4T steel under load spectrum derived from real operating conditions. The experimental results were compared to life predictions carried out adopting two models: (i) the conventional Nasgro equation and (ii) the cyclic R-curve concept implemented in the Modified Nasgro equation for describing the crack growth behavior of an arbitrary crack length. The results show that the life predictions performed by means of the Modified Nasgro equation coincide well with the experimental results with an underestimation of the residual lifetime less than 32%, while the traditional Nasgro equation leads to significant overestimation (≈120%) of the residual lifetime for load spectra close to the in service scenario.

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Section: Introductionmentioning

confidence: 99%

Investigation of Fatigue Crack Growth in Full-Scale Railway Axles Subjected to Service Load Spectra: Experiments and Predictive Models

Pourheidar

Patriarca

Beretta

et al. 2021

Metals

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“…The ball head seat of the ball hinge is connected with the threaded hole of the suspension cross arm through the thread; the ball joint forms a spherical motion pair between the ball seat and the ball bowl, which can rotate in the circumferential direction around the ball center 13,14 ; the ball pin passes through the taper hole of the steering knuckle and is connected with it, which is fastened by nuts and split pins. The ball joint structure is shown in Figure 7(a).…”

Section: Failure Analysis Of the Ball Hingementioning

confidence: 99%

Analysis of multiple failure behaviors of steering knuckle ball hinge of multi-axle heavy vehicle

Wang

Wei

Bao³

et al. 2021

Advances in Mechanical Engineering

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The ball hinge is a key component of the vehicle chassis that connects the steering knuckle and the control arm. The study analyzed the multiple failure behaviors of the chassis ball hinge. Firstly, according to the macroscopic failure characteristics of the ball hinge, the fault tree analysis method was adopted to identify the possible cause of the failure. Then, the axial load and radial load on the ball joint were obtained by simulating the force of the vehicle under the typical extreme conditions. The stress distribution of the ball pin was obtained by finite element analysis of the ball joint. The calculation results are consistent with the fatigue crack position of the ball hinge. Finally, the macro morphology and microstructure of the ball joint seat, ball bowl, dust cover and other parts matched with the ball hinge were analyzed to further verify the failure mode of the ball hinge. The results showed that the dust cover of the ball hinge was firstly aged and cracked, and the external dust and particles enter into the friction contact area of the ball hinge, which caused the ball pin and ball bowl to be stuck. During the operating of the vehicle, the ball pin undergoes unidirectional bending fatigue fracture in the stress concentration area at the root of the conical surface.

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“…The fretting mechanism on railway axles has been investigated [5]. Fatigue cracks are initiated at the weakest point located in the vicinity of the wheelseat edge [6] [7]. At a certain size, these defects can initiate the appearance of fatigue cracks.…”

Section: Introductionmentioning

confidence: 99%

Residual Life Prediction of Railway Axle: A Review

Maulana,

Gunawan

2023

JPI

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Meskipun dirancang untuk beroperasi selama lebih dari 30 tahun, poros roda kereta api sering mengalami kerusakan selama masa penggunaannya. Kerusakan dapat terjadi akibat pengaruh lingkungan, benturan benda asing, atau ketidaksempurnaan material. Makalah ini memberikan gambaran tentang kerusakan umum yang sering terjadi pada poros roda kereta api dan membahas model perhitungan pertumbuhan retakan kelelahan yang digunakan untuk menganalisis umur sisa, serta parameter yang mempengaruhi kegagalan kelelahan pada poros roda kereta api. Kemudian, studi terkait prediksi umur kelelahan yang telah dilakukan oleh beberapa peneliti telah ditinjau. Studi-studi tersebut menunjukkan bahwa penting mempertimbangkan berbagai variasi data saat melakukan perhitungan untuk menghasilkan hasil yang akurat dan dapat diandalkan. Kata Kunci: fatigue poros roda kereta api, Prediksi umur sisa, Perambatan retak

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Premature failures of railway axles after repeated pressing

Cited by 15 publications

References 22 publications

Investigation of Fatigue Crack Growth in Full-Scale Railway Axles Subjected to Service Load Spectra: Experiments and Predictive Models

Investigation of Fatigue Crack Growth in Full-Scale Railway Axles Subjected to Service Load Spectra: Experiments and Predictive Models

Analysis of multiple failure behaviors of steering knuckle ball hinge of multi-axle heavy vehicle

Residual Life Prediction of Railway Axle: A Review

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