An analysis method is presented for determining the conventional cyclic material properties from uniaxial strain-life fatigue test data. The method focuses on improving fatigue life predictions for variable amplitude histories when a significant amount of damage is associated with small cycles. Under these conditions, it is necessary to extrapolate the strain-life curve below the constant amplitude endurance limit. This extrapolation requires careful attention to the curve fitting process to avoid the influence of endurance limit affected data. A fitting approach has been developed which identifies structure shifts in the data in order to obtain cyclic material properties not influenced by the endurance limit or other transitions that negatively impact life predictions. This approach has been evaluated by comparing test lives of uniaxial specimens using the SAE log-skidder bending history to life predictions made using a fatigue analysis model based on rainflow counting, Smith-Watson-Topper mean stress, and linear damage. Good correlation of predicted to experimental life was achieved.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Property Fitting Approach for Improved Estimates of Small Cycle Fatigue Damage


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1992



    Publication date :

    1992-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A property fitting approach for improved estimates of small cycle fatigue damage

    Yan,X. / Cordes,T.S. / Vogel,,J.V. et al. | Automotive engineering | 1992


    Improved material property estimates using small sample sizes

    NADOLSKI, L. / DENNIES, D. / MATSON, D. et al. | AIAA | 1991


    Small Cracks and High-Cycle Fatigue

    Ritchie, R. O. | British Library Online Contents | 1996


    Small Cracks and High-Cycle Fatigue

    Ritchie, R. O. / ASME; Aerospace Division | British Library Conference Proceedings | 1996


    A Cycle Counting Algorithm for Fatigue Damage Analysis

    Richards, F. D. / LaPointe, N. R. / Wetzel, R. M. | SAE Technical Papers | 1974