Enhanced multiaxial fatigue criterion that considers stress gradient effects

Niels Saabye Ottosen, Matti Ristinmaa, Reijo Kouhia

    Research output: Contribution to journalArticleScientificpeer-review

    24 Citations (Scopus)

    Abstract

    Modification of a fatigue criterion valid for homogeneous multiaxial stress states to account for the beneficial effect of stress gradients is traditionally performed by modifying the stress terms in the fatigue criterion and thereby introducing new parameters that need to be calibrated. Here the stress terms are left unchanged and, instead, the parameters in the fatigue criterion are modified. This modification is performed, in principle, along the lines of Siebel and Stieler and it introduces Neuber's parameter as the only new parameter; however, as soon as the ultimate strength of the material is known, also Neuber's parameter is known. Therefore, the methodology introduced implies that no new calibration process is needed. Here a specific fatigue criterion valid for homogeneous multiaxial stress states is enhanced by this procedure and predictions of this simple approach are compared with a broad range of experimental data and good accuracy is achieved. Moreover, the approach adopted can be applied to other fatigue criteria than the one considered here.

    Original languageEnglish
    Pages (from-to)128-139
    Number of pages12
    JournalInternational Journal of Fatigue
    Volume116
    DOIs
    Publication statusPublished - 1 Nov 2018
    Publication typeA1 Journal article-refereed

    Keywords

    • Fatigue
    • Gradient effects
    • Multiaxial fatigue

    Publication forum classification

    • Publication forum level 2

    ASJC Scopus subject areas

    • Modelling and Simulation
    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering
    • Industrial and Manufacturing Engineering

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