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Railseamlesslineraillongitudinalforcetestingdevice

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Registration number：G20250479

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Key words： Rail temperature stress

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Publisher：管理人员

Release time：2025-08-09 08:53:58.0

  • Essential information
Name of achievement： Railseamlesslineraillongitudinalforcetestingdevice
Result registration number： G20250479 Subject classification：
Green classification： Item keywords： Rail temperature stress        
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Tongji University

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Countries/regions： China Intellectual property rights：
Introduction： Click to view
In seamless railway tracks, changes in temperature generate significant longitudinal forces within the steel rails, known as rail temperature stress. Due to the uneven distribution of fastener clamping pressure and the influence of train loads, the temperature stress inside the rail is unevenly distributed along its length. Therefore, it is difficult to calculate the temperature stress in the rail using computational methods. This uneven distribution of longitudinal forces is the fundamental cause of rail expansion during summer and rail breakage during winter in seamless lines, severely affecting the safe operation of trains.
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