Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios
Thermal loading from wheel-rail frictional heat accelerates wear, plastic deformation, and fatigue, especially at high contact temperatures. Accurate wheel-rail contact temperature measurements, especially under operational conditions, are essential to understand and prevent thermal damage. Existing...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25009025 |
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| _version_ | 1849702585108267008 |
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| author | Chunyan He Pan Zhang Zhen Yang Rolf Dollevoet Zili Li |
| author_facet | Chunyan He Pan Zhang Zhen Yang Rolf Dollevoet Zili Li |
| author_sort | Chunyan He |
| collection | DOAJ |
| description | Thermal loading from wheel-rail frictional heat accelerates wear, plastic deformation, and fatigue, especially at high contact temperatures. Accurate wheel-rail contact temperature measurements, especially under operational conditions, are essential to understand and prevent thermal damage. Existing studies have mostly focused on lower temperatures (below 200 °C), leaving higher, damage-causing temperatures underexplored. To address this limitation, this work utilizes a unique V-Track test rig and a novel high-precision infrared thermal measurement system to generate and continuously measure the high temperatures (maximum 1200 °C) induced by wheel-rail dynamic contact. A wheel braking process was simulated by applying a controllable negative wheel torque, generating slip ratios from 2 % to 99 %. Emissivity calibration of the V-Track rail samples was conducted to ensure measurement accuracy. Test results revealed that the wheel-rail contact temperature generally rose with slip ratios, reaching up to 1000 °C at a slip ratio of 99 %. At a slip ratio of 40 %, a “wheel flat” formed with a contact temperature of approximately 624 °C, followed by a rapid drop as the “wheel flat” exited the contact area. This advanced testing system is capable of both generating and precisely measuring high temperatures at the rolling interface, offering insights into thermal damage mechanisms and demonstrating the potential for calibrating and validating thermal contact and damage numerical models. |
| format | Article |
| id | doaj-art-5b44ca5eec37406b93da3a2b58057096 |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-5b44ca5eec37406b93da3a2b580570962025-08-20T03:17:35ZengElsevierCase Studies in Thermal Engineering2214-157X2025-09-017310664210.1016/j.csite.2025.106642Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratiosChunyan He0Pan Zhang1Zhen Yang2Rolf Dollevoet3Zili Li4Delft University of Technology, Section of Railway Engineering, Stevinweg 1, 2628 CN, Delft, the NetherlandsCorresponding author.; Delft University of Technology, Section of Railway Engineering, Stevinweg 1, 2628 CN, Delft, the NetherlandsDelft University of Technology, Section of Railway Engineering, Stevinweg 1, 2628 CN, Delft, the NetherlandsDelft University of Technology, Section of Railway Engineering, Stevinweg 1, 2628 CN, Delft, the NetherlandsDelft University of Technology, Section of Railway Engineering, Stevinweg 1, 2628 CN, Delft, the NetherlandsThermal loading from wheel-rail frictional heat accelerates wear, plastic deformation, and fatigue, especially at high contact temperatures. Accurate wheel-rail contact temperature measurements, especially under operational conditions, are essential to understand and prevent thermal damage. Existing studies have mostly focused on lower temperatures (below 200 °C), leaving higher, damage-causing temperatures underexplored. To address this limitation, this work utilizes a unique V-Track test rig and a novel high-precision infrared thermal measurement system to generate and continuously measure the high temperatures (maximum 1200 °C) induced by wheel-rail dynamic contact. A wheel braking process was simulated by applying a controllable negative wheel torque, generating slip ratios from 2 % to 99 %. Emissivity calibration of the V-Track rail samples was conducted to ensure measurement accuracy. Test results revealed that the wheel-rail contact temperature generally rose with slip ratios, reaching up to 1000 °C at a slip ratio of 99 %. At a slip ratio of 40 %, a “wheel flat” formed with a contact temperature of approximately 624 °C, followed by a rapid drop as the “wheel flat” exited the contact area. This advanced testing system is capable of both generating and precisely measuring high temperatures at the rolling interface, offering insights into thermal damage mechanisms and demonstrating the potential for calibrating and validating thermal contact and damage numerical models.http://www.sciencedirect.com/science/article/pii/S2214157X25009025Temperature measurementWheel-rail frictional rolling contactHigh-precision infrared thermal cameraSlip ratiosThermal effectV-track test rig |
| spellingShingle | Chunyan He Pan Zhang Zhen Yang Rolf Dollevoet Zili Li Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios Case Studies in Thermal Engineering Temperature measurement Wheel-rail frictional rolling contact High-precision infrared thermal camera Slip ratios Thermal effect V-track test rig |
| title | Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios |
| title_full | Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios |
| title_fullStr | Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios |
| title_full_unstemmed | Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios |
| title_short | Infrared temperature measurement of wheel-rail frictional rolling contact with high slip ratios |
| title_sort | infrared temperature measurement of wheel rail frictional rolling contact with high slip ratios |
| topic | Temperature measurement Wheel-rail frictional rolling contact High-precision infrared thermal camera Slip ratios Thermal effect V-track test rig |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25009025 |
| work_keys_str_mv | AT chunyanhe infraredtemperaturemeasurementofwheelrailfrictionalrollingcontactwithhighslipratios AT panzhang infraredtemperaturemeasurementofwheelrailfrictionalrollingcontactwithhighslipratios AT zhenyang infraredtemperaturemeasurementofwheelrailfrictionalrollingcontactwithhighslipratios AT rolfdollevoet infraredtemperaturemeasurementofwheelrailfrictionalrollingcontactwithhighslipratios AT zilili infraredtemperaturemeasurementofwheelrailfrictionalrollingcontactwithhighslipratios |