You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Fatigue Endurance Diagram for Materials with Defects

    Published: 0

      Format Pages Price  
    PDF (188K) 12 $25   ADD TO CART
    Complete Source PDF (15M) 584 $139   ADD TO CART


    Engine and turbine components that experience high cycle fatigue should operate under the fatigue threshold stress level to ensure their safe service life. In general, designers have to consider two types of thresholds, i.e. fatigue stress threshold for crack initiation, and fatigue stress intensity factor threshold for crack propagation. These two thresholds overlap for short cracks or materials with defects. A new approach, which is called the fatigue endurance diagram (FED) for the prediction of fatigue threshold of materials with defects, is presented. This approach indicates that the fatigue strength of materials with cracks or defects is determined simultaneously by two parameters, the normalized stress intensity factor range and the normalized stress range. The FED indicates that the fatigue threshold condition is governed mainly by the threshold stress intensity factor and by the fatigue limit for the long and short cracks, respectively.


    fatigue threshold, fatigue limit, small defect, crack, fatigue endurance diagram (FED), load ratio, adjusting parameter

    Author Information:

    Kim, BJ
    Senior Researcher, Hyundai Heavy Industries, Co. Ltd., Ulsan,

    Kujawski, D
    Professor, Western Michigan University, Kalamazoo, MI

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP11502S