Numerical study on the ratcheting performance of heavy haul rails in curved tracks

Hang Su, Chung Lun Pun, Peter Mutton, Qianhua Kan, Wenyi Yan

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The ratcheting performance of heavy haul rails in curved tracks under different in-service loading conditions was numerically evaluated by using a recently developed approach. The wheel-high rail cyclic rolling contact was simulated by translating the non-Hertzian contact pressure distribution and the estimated longitudinal tangential traction repeatedly on the running surface of the high rail. The maximum ratcheting strain rate of the rail target section was obtained in each loading cycle. Based on the known ductility limit of the rail steel and the obtained maximum stabilized ratcheting strain rate, the crack initiation life of the rail was predicted in each case. The results indicate that the crack initiation life for all the three rail steels investigated decreases with the increase of the normalized tangential traction, the friction coefficient, the ratio of lateral/axle load and the axle load. The hypereutectoid steel with a lower carbon content always shows the best ratcheting performance and is likely to be the best choice for the high rails in curved tracks. The results can provide valuable information to assist rail operators in the selection of rail steel grades and the development of rail maintenance strategies.

Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018
EditorsAlfredo Nunez, Zili Li
PublisherTU Delft
Pages938-947
Number of pages10
ISBN (Electronic)9789461869630
Publication statusPublished - 1 Jan 2018
EventInternational Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018 - Delft, Netherlands
Duration: 24 Sep 201827 Sep 2018
Conference number: 11th

Publication series

NameProceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018

Conference

ConferenceInternational Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018
Abbreviated titleCM 2018
CountryNetherlands
CityDelft
Period24/09/1827/09/18

Keywords

  • Crack initiation life
  • Curved tracks
  • Finite element analysis.
  • Ratcheting performance
  • Two-point cyclic rolling contact

Cite this

Su, H., Pun, C. L., Mutton, P., Kan, Q., & Yan, W. (2018). Numerical study on the ratcheting performance of heavy haul rails in curved tracks. In A. Nunez, & Z. Li (Eds.), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018 (pp. 938-947). (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018). TU Delft.
Su, Hang ; Pun, Chung Lun ; Mutton, Peter ; Kan, Qianhua ; Yan, Wenyi. / Numerical study on the ratcheting performance of heavy haul rails in curved tracks. Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. editor / Alfredo Nunez ; Zili Li. TU Delft, 2018. pp. 938-947 (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).
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title = "Numerical study on the ratcheting performance of heavy haul rails in curved tracks",
abstract = "The ratcheting performance of heavy haul rails in curved tracks under different in-service loading conditions was numerically evaluated by using a recently developed approach. The wheel-high rail cyclic rolling contact was simulated by translating the non-Hertzian contact pressure distribution and the estimated longitudinal tangential traction repeatedly on the running surface of the high rail. The maximum ratcheting strain rate of the rail target section was obtained in each loading cycle. Based on the known ductility limit of the rail steel and the obtained maximum stabilized ratcheting strain rate, the crack initiation life of the rail was predicted in each case. The results indicate that the crack initiation life for all the three rail steels investigated decreases with the increase of the normalized tangential traction, the friction coefficient, the ratio of lateral/axle load and the axle load. The hypereutectoid steel with a lower carbon content always shows the best ratcheting performance and is likely to be the best choice for the high rails in curved tracks. The results can provide valuable information to assist rail operators in the selection of rail steel grades and the development of rail maintenance strategies.",
keywords = "Crack initiation life, Curved tracks, Finite element analysis., Ratcheting performance, Two-point cyclic rolling contact",
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Su, H, Pun, CL, Mutton, P, Kan, Q & Yan, W 2018, Numerical study on the ratcheting performance of heavy haul rails in curved tracks. in A Nunez & Z Li (eds), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018, TU Delft, pp. 938-947, International Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018, Delft, Netherlands, 24/09/18.

Numerical study on the ratcheting performance of heavy haul rails in curved tracks. / Su, Hang; Pun, Chung Lun; Mutton, Peter; Kan, Qianhua; Yan, Wenyi.

Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. ed. / Alfredo Nunez; Zili Li. TU Delft, 2018. p. 938-947 (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

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N2 - The ratcheting performance of heavy haul rails in curved tracks under different in-service loading conditions was numerically evaluated by using a recently developed approach. The wheel-high rail cyclic rolling contact was simulated by translating the non-Hertzian contact pressure distribution and the estimated longitudinal tangential traction repeatedly on the running surface of the high rail. The maximum ratcheting strain rate of the rail target section was obtained in each loading cycle. Based on the known ductility limit of the rail steel and the obtained maximum stabilized ratcheting strain rate, the crack initiation life of the rail was predicted in each case. The results indicate that the crack initiation life for all the three rail steels investigated decreases with the increase of the normalized tangential traction, the friction coefficient, the ratio of lateral/axle load and the axle load. The hypereutectoid steel with a lower carbon content always shows the best ratcheting performance and is likely to be the best choice for the high rails in curved tracks. The results can provide valuable information to assist rail operators in the selection of rail steel grades and the development of rail maintenance strategies.

AB - The ratcheting performance of heavy haul rails in curved tracks under different in-service loading conditions was numerically evaluated by using a recently developed approach. The wheel-high rail cyclic rolling contact was simulated by translating the non-Hertzian contact pressure distribution and the estimated longitudinal tangential traction repeatedly on the running surface of the high rail. The maximum ratcheting strain rate of the rail target section was obtained in each loading cycle. Based on the known ductility limit of the rail steel and the obtained maximum stabilized ratcheting strain rate, the crack initiation life of the rail was predicted in each case. The results indicate that the crack initiation life for all the three rail steels investigated decreases with the increase of the normalized tangential traction, the friction coefficient, the ratio of lateral/axle load and the axle load. The hypereutectoid steel with a lower carbon content always shows the best ratcheting performance and is likely to be the best choice for the high rails in curved tracks. The results can provide valuable information to assist rail operators in the selection of rail steel grades and the development of rail maintenance strategies.

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PB - TU Delft

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Su H, Pun CL, Mutton P, Kan Q, Yan W. Numerical study on the ratcheting performance of heavy haul rails in curved tracks. In Nunez A, Li Z, editors, Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. TU Delft. 2018. p. 938-947. (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).