1. Investigation on friction and wear behavior of wheel material of wheel-rail: a case study of addis ababa light rail transit.
- Author
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Demisie, Leul Fenta, Wolla, Desalegn Wogaso, Zeleke, Fentahun Workie, Lakew, Endalew Tigabie, Ayalew, Yewondwosen Gzate, Mengistu, Nakachew Genet, Kassa, Mequanint Yilak, and Ayaliew, Tesfa Guadie
- Subjects
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STREET railroads , *DRY friction , *MECHANICAL wear , *TRIBOLOGY , *FRICTION - Abstract
This article presents wheel wear in light rail traffic and the friction behavior of wheel material under both dry and lubricated conditions. The main purpose of this research is to study the wheel-rail tribology for the Addis Ababa Light Rail Transit and to evaluate the friction and wear behavior of the wheel material under both dry and lubricated conditions. Composition, hardness, and ring compression tests were conducted to characterize the existing and the developed material. The percentage composition of carbon, manganese, and silicon gained 0.5%, 0.7%, and 0.25%, respectively, for existing and 0.8%, 1.15%, and 0.38% for alloyed wheel steel. It is also shown that the hardness value of the wheel material increased from 98.88 to 99.7 HRC when the existing material is compared with the developed material. The samples with dimensions outer diameter of 42 mm, inner diameter of 21 mm, and height of 14 mm were used for this study, and the dimensional change occurring under ring compression is different depending on the dry and lubricant conditions. Based on experimental analysis, 0.15, 0.13, and 0.09 were the evaluated coefficients of friction for dry, grease, and oil conditions, respectively. It is concluded that 0.09 is a coefficient of friction and oil is a suitable lubricant. To minimize wheel wear in the wheel-rail, proper lubrication and better application, improved wheel material, and revised track alignment for easier cornering and improvement are required. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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