Aircraft engine structures can contain small cracks, which have developed from defects induced during material processing. Advanced structural materials such as nickel-based superalloys undergo extensive plastic deformation prior to failure, therefore, these small cracks can be subjected to localized damage with significant amount of plasticity. We have conducted a combined computational/experimental study of fatigue crack growth at room temperature and at 260 degree C. The experimental results have been correlated with three-dimensional finite element calculations. Material constitutive equations and a computational procedure to calculate energy release rate along the crack front are developed. It is shown that the fatigue crack growth rate is related to a power function of Jmax.


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    Titel :

    Three-dimensional fatigue cracking under elastic-plastic deformation


    Beteiligte:
    Staroselsky, A. (Autor:in) / Vestergaard, L. (Autor:in) / Annigeri, B. (Autor:in) / Favrow, L. (Autor:in) / Walls, D. (Autor:in)

    Erschienen in:

    International Journal of Fatigue ; 23 , SUPPL. 1 ; S65-S70


    Erscheinungsdatum :

    2001


    Format / Umfang :

    6 Seiten, 10 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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