Prediction of the Fatigue Limit of Prestrained Carbon Steel Under Tensile Mean Stress

    Volume 5, Issue 3 (March 2008)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 4 March 2008

    Page Count: 13


    Kang, Minwoo
    Department of Mechanical Engineering Science, Kyushu University, Nishi-ku, Fukuoka

    Irisa, Kentaro
    Department of Mechanical Engineering Science, Kyushu University, Nishi-ku, Fukuoka

    Aono, Yuuta
    Department of Mechanical Engineering Science, Kyushu University, Nishi-ku, Fukuoka

    Noguchi, Hiroshi
    Department of Mechanical Engineering Science, Kyushu University, Nishi-ku, Fukuoka

    (Received 7 November 2007; accepted 28 January 2008)

    Abstract

    The effect of tensile mean stress on the fatigue limit of carbon steel was investigated. Annealed 0.1 % and 0.5 % carbon steel specimens were subjected to monotonic tension to produce prestrain. Fatigue tests were performed using a servohydraulic fatigue test machine. The experimental results showed that tensile mean stress degraded the fatigue limit. However, the tensile mean stress did not affect the decrease in the surface hardness as a result of fatigue loading for the specimen without a defect. In the case of the specimen with a defect, the decrease in the hardness was small and did not depend on the mean stress or stress amplitude. Formulae for predicting the fatigue limit of prestrained carbon steel specimens under tensile mean stress were proposed. The results calculated using the formulae showed good agreement with the experimental results.


    Paper ID: JAI101528

    DOI: 10.1520/JAI101528

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    Author
    Title Prediction of the Fatigue Limit of Prestrained Carbon Steel Under Tensile Mean Stress
    Symposium Seventh International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (36th ASTM National Symposium on Fatigue and Fracture Mechanics), 2007-11-16
    Committee E08