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http://dx.doi.org/10.14346/JKOSOS.2012.27.2.001

Evaluation of Multiaxial Fatigue Strength of a Urban Railway Wheel Steel  

Ahn, Jong-Gon (Graduate School of Railroad, Seoul National University of Science and Technology)
You, In-Dong (Graduate School of Railroad, Seoul National University of Science and Technology)
Kwon, Seok-Jin (Korean Railroad Research Institute)
Kim, Ho-Kyung (Department of Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Society of Safety / v.27, no.2, 2012 , pp. 1-6 More about this Journal
Abstract
Uniaxial and biaxial torsional fatigue tests were conducted on the samples extracted from urban railway wheel steel. Ultimate and yield strengths of the steel were 1027.7 MPa and 626 MPa, respectively. The uniaxial fatigue limit was 422.5 MPa, corresponding 67% of the ultimate tensile strength. The ratio of ${\tau}_e/{\sigma}_e$ was 0.63. Fatigue strength coefficient and exponent were 1319.5 MPa and 0.339, respectively. Maximum principal and equivalent strain were found to be adequate parameter to predict fatigue lifetime of the steel under multiaixal fatigue condition.
Keywords
railway wheel; fatigue strength; multiaxial fatigue; fatigue lifetime;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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