Influence of Operating Parameters on the Temperature Rise of the Wheel Tread of a Freight Wagon When Braking on a Long Downhill Ramp.
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| Title: | Influence of Operating Parameters on the Temperature Rise of the Wheel Tread of a Freight Wagon When Braking on a Long Downhill Ramp. |
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| Authors: | Zhang, Jinyu1 (AUTHOR), Tao, Gongquan1 (AUTHOR), Wen, Zefeng1 (AUTHOR) zfwen@swjtu.edu.cn |
| Source: | Tribology Transactions. Mar/Apr2026, Vol. 69 Issue 2, p394-410. 17p. |
| Subjects: | Temperature, Brake systems, Finite element method, Friction materials |
| Abstract: | Due to geographical constraints, some vehicles operate on long downhill ramps. When the vehicle undergoes prolonged braking, continuous heat accumulation occurs on the wheel tread surface, which increases the likelihood of wheel fatigue damage. This study examines how brake shoe materials, ramp gradients, ramp length, axle weights, and braking speeds influence temperature rise in freight wagon wheels during constant speed braking on long downhill ramps. A coupled thermomechanical finite element model of wheel–brake shoe friction, balancing computational accuracy and efficiency, was developed to simulate the conditions of long downhill ramps. Using a two-dimensional thermomechanical coupled finite element model in a commercial finite element solver, we observed that high-friction synthetic brake materials generated the highest maximum wheel tread temperatures, followed by sintered and cast iron materials. Specifically, a 2‰ increase in ramp gradient results in a 13% rise in maximum tread temperature, and a 3-tonne increase in axle weight causes a 14% increase. Temperature increases linearly with ramp gradient and axle weight. Moreover, the influence of braking speed and ramp length on temperature rise diminishes at higher values, whereas radial temperature decreases nonlinearly with depth. Various vehicle operating parameters significantly affect the evolution of wheel tread temperature during operation on long downhill ramps. These findings offer valuable insights into temperature management and performance optimization of braking systems operating on long downhill ramps. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Due to geographical constraints, some vehicles operate on long downhill ramps. When the vehicle undergoes prolonged braking, continuous heat accumulation occurs on the wheel tread surface, which increases the likelihood of wheel fatigue damage. This study examines how brake shoe materials, ramp gradients, ramp length, axle weights, and braking speeds influence temperature rise in freight wagon wheels during constant speed braking on long downhill ramps. A coupled thermomechanical finite element model of wheel–brake shoe friction, balancing computational accuracy and efficiency, was developed to simulate the conditions of long downhill ramps. Using a two-dimensional thermomechanical coupled finite element model in a commercial finite element solver, we observed that high-friction synthetic brake materials generated the highest maximum wheel tread temperatures, followed by sintered and cast iron materials. Specifically, a 2‰ increase in ramp gradient results in a 13% rise in maximum tread temperature, and a 3-tonne increase in axle weight causes a 14% increase. Temperature increases linearly with ramp gradient and axle weight. Moreover, the influence of braking speed and ramp length on temperature rise diminishes at higher values, whereas radial temperature decreases nonlinearly with depth. Various vehicle operating parameters significantly affect the evolution of wheel tread temperature during operation on long downhill ramps. These findings offer valuable insights into temperature management and performance optimization of braking systems operating on long downhill ramps. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10402004 |
| DOI: | 10.1080/10402004.2025.2488802 |
