Experimental investigation on the rail residual stress distribution and its influence on the bending fatigue resistance of rails

Kang, Chongjie; Wenner, Marc; Marx, Steffen

doi:10.1016/j.conbuildmat.2021.122856

Cited by 12 publications

(9 citation statements)

References 19 publications

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“…Shingo MITSUI, 1) * Toshihiko SASAKI, 2) Masayoshi SHINYA, 3) Yasuo ARAI 4) and Ryutaro NISHIMURA 5) 1) Data Science and AI Innovation Research Promotion Center, Shiga University, 1-1-1 Banba, Hikone, Shiga, 522-8522 Japan.…”

Section: Anomaly Detection In Rails Using Dimensionality Reductionmentioning

confidence: 99%

“…reported the mechanism of rolling contact fatigue of rails by conducting triaxial stress analysis of rails using residual stresses and the full width at half maximum (FWHM) of the diffraction rings of X-rays. 1) Many systematic studies have been conducted on rail damage, such as residual stress, [2][3][4][5] crack propagation, 6,7) and white etching layer (WEL). [8][9][10][11][12] However, the details of the damage mechanism of rails have not been clarified because of the complex combination of multiple conditions, such as passing tonnage, transit speed, and weather conditions.…”

Section: Anomaly Detection In Rails Using Dimensionality Reductionmentioning

confidence: 99%

“…The log likelihood L(μ, Σ|D) of this function based on D is In the maximum likelihood method, we determine values for μ and Σ that maximize Eq. (2). By performing partial differentiation on each and solving for the equation that is zero, the maximum likelihood solutions, μ µ and Σ Σ , are obtained as follows: This is equivalent to the square of Mahalanobis distance.…”

Section: Multivariate Gaussian Distributionmentioning

confidence: 99%

“…Next, suppose an orthonormal basis U m ≡ [u 1 ,..., u m ] is obtained by PCA of normal data only, which spans an m-dimensional normal subspace with dimensionality reduction by solving the eigenequation. By resolving an arbitrary input x′ into its normal subspace components x′ (1) and orthogonal components x′ (2) , we can express it as follows:…”

Section: Principal Component Analysismentioning

confidence: 99%

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Anomaly Detection in Rails Using Dimensionality Reduction

et al. 2023

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Section: Anomaly Detection In Rails Using Dimensionality Reductionmentioning

confidence: 99%

Section: Anomaly Detection In Rails Using Dimensionality Reductionmentioning

confidence: 99%

Section: Multivariate Gaussian Distributionmentioning

confidence: 99%

Section: Principal Component Analysismentioning

confidence: 99%

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Anomaly Detection in Rails Using Dimensionality Reduction

et al. 2023

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“…In the above research, there are few studies on the vehicle running performance under the condition of fastener failure. During the long-term operation of subway, the rail fastener may be damaged by fatigue and impact [21][22][23][24], and it will lead to the failure of the connecting member (i.e., fastener) between the rail and the track plate. Therefore, the support spacing of the rail will become larger, and it will result in an increase in dynamic rail displacement under vehicle load, which will compromise the vehicle's running comfort and even safety.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fastener Failure on Dynamic Performance of Subway Vehicle

Zhan¹,

Yuan²,

et al. 2022

Applied Sciences

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The track fasteners may be damaged by fatigue and impact load during long-term subway operation, resulting in the failure of the connecting components between the rail and the track plate, and the spacing of rail support becomes larger, resulting in an increase in its dynamic deformation, affecting the subway vehicle’s running performance, and, in severe cases, endangering the vehicle’s running safety. A vehicle-subway track system model was created to study the running performance of subway vehicles when fasteners failed. A multi-rigid, body spring damping system is used to describe the vehicle system. The model for the track system is created using the finite element method (FEM), and the vehicle dynamic performances under various fastener failure scenarios are calculated, as well as the vehicle’s running comfort and safety in various scenarios. The findings show that fastener failure has little impact on the vehicle’s running comfort but it has a significant impact on the vehicle’s wheel unloading ratio.

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Zulässige Schienendruckkräfte für den Nachweis der Gleis‐Tragwerks‐Interaktion bei Fester Fahrbahn

Diers,

Wenner,

Slovák

et al. 2023

Bautechnik

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Beim modernen Oberbau mit lückenlos verschweißter Schiene entstehen auf Brücken durch die Interaktion mit dem Bauwerk höhere axiale Beanspruchungen der Schiene als auf dem Damm. Beim Schotteroberbau gilt es die Druckkräfte in der Schiene zu begrenzen, um Gleisverwerfungen zu vermeiden. Dazu wurden in den 1980er‐Jahren umfangreiche Untersuchungen durchgeführt, woraus ein Grenzwert für die zulässigen zusätzlichen Druckspannungen von 72 MPa definiert wurde. Bei der Festen Fahrbahn liegen jedoch keine Erfahrungen zum Verhalten unter großen Druckkräften vor und der erhöhte Grenzwert von 92 MPa beruht auf keiner wissenschaftlich nachvollziehbaren Basis. Für den Fall der EÜ Itztal auf der Neubaustrecke Ebensfeld–Erfurt konnte der Nachweis der zusätzlichen Druckspannungen mit dem Grenzwert von 92 MPa nicht erbracht werden. Um fallspezifisch einen neuen Grenzwert festlegen zu können, wurden Untersuchungen vorgenommen, die in diesem Aufsatz vorgestellt werden. Das Verhalten des Systems unter großen Druckkräften wurde rechnerisch und experimentell untersucht. Für den Nachweis einer ausreichenden Sicherheit des Systems bei großen Schienendruckkräften wurden Grenzzustände festgelegt und für abgesicherte Einwirkungskombinationen nachgewiesen. Das Fallbeispiel zeigt die Reserven des Systems auf und legt eine mögliche Methode für eine grundsätzliche Überarbeitung des Grenzwerts der Schienendruckspannungen beim System Feste Fahrbahn vor.

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Experimental investigation on the rail residual stress distribution and its influence on the bending fatigue resistance of rails

Cited by 12 publications

References 19 publications

Anomaly Detection in Rails Using Dimensionality Reduction

Anomaly Detection in Rails Using Dimensionality Reduction

Influence of Fastener Failure on Dynamic Performance of Subway Vehicle

Zulässige Schienendruckkräfte für den Nachweis der Gleis‐Tragwerks‐Interaktion bei Fester Fahrbahn

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