(Received 1 April 2013; accepted 27 June 2013)
Published Online: 2013
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This paper reexamines a multiaxial fatigue failure criterion in the presence of small defects. The criterion is based on the assumption that a Mode-I crack on a specified plane, termed a critical plane, plays a dominant role in the determination of fatigue strength. The present study extends previous research to propose a modified failure criterion in conjunction with a systematic computational scheme, and to conduct a detailed analysis of its predictive capability. Using the proposed computational scheme, the applied stress level for the multiaxial fatigue failure can be efficiently predicted for both in-phase and out-of-phase loadings. Additionally, a series of parametric studies was conducted to examine the material's sensitivity to the biaxial stress state with respect to the fatigue strength.
Associate Professor, Dept. of Mechanical Engineering, Institute of Materials Science & Technology, Fukuoka Univ., Fukuoka City, Fukuoka
Stock #: MPC20130013