- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | WANG Ping, WANG Xiaoming, HE Qing, AN Boyang. Analysis of Wheel−Rail Frictional Temperature Rise Considering Temperature-Dependent Material Properties and Damage Discontinuities[J]. Journal of Southwest Jiaotong University, 2026, 61(3): 986-994. doi: 10.3969/j.issn.0258-2724.20260146
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In the calculation of wheel–rail frictional temperature rise, temperature-dependent material properties and surface cracks induce material discontinuities and geometric discontinuities, respectively, which are difficult to handle using traditional analytical and finite element methods based on continuum mechanics. Therefore, based on the nonlocal peridynamic heat conduction theory, a two-dimensional analysis model for wheel–rail frictional temperature rise was established by using a moving heat source method to represent the frictional heat generation boundary in the wheel–rail contact region. First, under identical calculation parameters, the results of the established model were compared with those of the classical analytical method; subsequently, the effects of temperature-dependent material properties and adiabatic crack inclination angle on the rail frictional temperature rise were analyzed. The results indicate that the maximum rail surface temperatures obtained by the established model and the classical analytical method are 364.9 ℃ and 358.7 ℃, respectively, with a relative error of only 1.7%, which verifies the rationality and accuracy of the model. Without considering temperature-dependent material properties, the frictional temperature rise increases linearly with creepage; when considering temperature-dependent material properties, heat more easily accumulates near the rail surface, manifesting as increased surface temperature and decreased internal temperature, and this effect is more pronounced at higher creepage. Under the 15% creepage condition, the local internal temperature when considering temperature-dependent material properties is even lower than that under the 10% creepage condition without considering temperature-dependent material properties. Rail surface cracks significantly alter the local heat flow path and induce heat concentration. When the crack inclination angle is 30°, the peak temperature near the crack reaches 1 014.6 ℃, which is about three times the temperature at the same location in the crack-free condition. The research results provide a new numerical method for analyzing wheel–rail frictional temperature rise under complex conditions.
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