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A Study on the Fatigue Damage of a Railway Disc Brake Surface Due to Thermal Stress During Braking Using FEM Analysis  

Joo, Se-Min (서울산업대학교, NID융합기술대학원)
Kwon, Yong-Sang (서울산업대학교 자동차공학과)
Kim, Ho-Kyung (서울산업대학교 자동차공학과)
Publication Information
Journal of the Korean Society for Railway / v.12, no.2, 2009 , pp. 212-218 More about this Journal
Abstract
In order to investigate the thermal cracking of the rolling stock brake disc, finite element analysis was conducted on the temperature distribution and thermal stress of the disc during braking. In case of initial vehicle speed of 90, 106, 120km/h, the maximum temperature on the disk surface due to braking was $135.9^{\circ}C,\;157.9^{\circ}C,\;178.7^{\circ}C$, respectively. And, the maximum von-Mises stress at the disc surface was 42.4, 50.3, 57.1MPa at a speed of 90, 105, 120km/h, respectively, indicating that the stress increases with an increment in the speed. Damage fraction due to braking during one year running on the Seoul - Busan line was determined as 14.6%.
Keywords
Brake disc; Finite Element Analysis; Thermal stress; Fatigue damage;
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Times Cited By KSCI : 2  (Citation Analysis)
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