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http://dx.doi.org/10.9726/kspse.2016.20.3.029

Estimation of Probability Distribution of Fatigue Lives in Crank Throw Forged Steel  

Kim, Seon-Jin (Department of Mechanical Design Engineering, Pukyong National University)
Ahn, Seok-Hwan (Department of Mechatronics, Jungwon University)
Publication Information
Journal of Power System Engineering / v.20, no.3, 2016 , pp. 29-35 More about this Journal
Abstract
Because of the severe service environment of the large marine vessel, the fatigue strength and its evaluation play an important role in design and maintenance of marine crankshaft. The aim of this work is to investigate the probability distribution of fatigue lives in crank throw forged steel and to develop the methodology for estimation of the probabilistic design fatigue strength. Detailed studies were performed on the constant amplitude axial loading fatigue test. The experiments were controlled by stress ratio of -1 and 15Hz frequency for each stress level. The considerable variability of fatigue life was observed in each stress level under rigidly controlled constant fatigue testing conditions. The fatigue life of crank throw forged steel was well followed the log-normal and Weibull distribution. In addition, it can be used for the estimation of probabilistic design fatigue strength by using the proposed methodology.
Keywords
Crank Throw; Fatigue Life; Variability; Weibull Distribution; Design Fatigue Strength;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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