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Understanding Wheel/Rail Interface Problems: The Unique Contributions and Legacy of Ken Johnson.

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Title: Understanding Wheel/Rail Interface Problems: The Unique Contributions and Legacy of Ken Johnson.
Authors: Grassie, Stuart L.1 (AUTHOR) stuart@stuartgrassie.com
Source: Tribology Letters. Jun2026, Vol. 74 Issue 2, p1-11. 11p.
Abstract: Ken Johnson's work in several areas of railway research is explored and placed in the context of both the time that this took place and within previous and more especially subsequent developments. Ken's contributions on corrugation, shakedown, and rail damage are considered, in particular a rolling contact fatigue (RCF) defect known as a squat. Shakedown theory, which was used to propose a mechanism for initiation of squats, is used to demonstrate not only why squats were a consequence of very specific circumstances but also why they ceased to be a widespread problem in the mid-1990s. The work on shakedown undertaken by Ken and his colleagues is relevant not only to understanding modern-day rail defects but also to determining conditions that could help to avoid rail damage. [ABSTRACT FROM AUTHOR]
Copyright of Tribology Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Understanding Wheel/Rail Interface Problems: The Unique Contributions and Legacy of Ken Johnson.
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  Data: Ken Johnson's work in several areas of railway research is explored and placed in the context of both the time that this took place and within previous and more especially subsequent developments. Ken's contributions on corrugation, shakedown, and rail damage are considered, in particular a rolling contact fatigue (RCF) defect known as a squat. Shakedown theory, which was used to propose a mechanism for initiation of squats, is used to demonstrate not only why squats were a consequence of very specific circumstances but also why they ceased to be a widespread problem in the mid-1990s. The work on shakedown undertaken by Ken and his colleagues is relevant not only to understanding modern-day rail defects but also to determining conditions that could help to avoid rail damage. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Tribology Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Jun2026
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