STP969

    Application of the J Concept to Fatigue Crack Growth in Large-Scale Yielding

    Published: Jan 1988


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    Abstract

    Fatigue crack propagation tests were performed on compact tension specimens of AISI 316 steel, in the elastic-plastic and plastic regions. The parameter ΔJ was chosen to characterize propagation. Results show that there is a Paris law type correlation between propagation rate and ΔJ. An effect on propagation rate, which is attributed to the R = Pmin/Pmax ratio, has been noted.

    A numerical verification of the applicability of the ΔJ concept was determined by use of a theoretical equation. These results were compared with experimental results.

    Keywords:

    low-cycle fatigue, fatigue crack growth rate, J, integral, Δ, J, integral, R, -ratio effect, numerical calculation, Eisenberg model, fracture mechanics


    Author Information:

    Lambert, Y
    Research engineers and professor, Université de Compiegne, Groupe Mécanique, Compiegne,

    Saillard, P
    Framatome, Centre de Calcul, Saint Marcel,

    Bathias, C
    Research engineers and professor, Université de Compiegne, Groupe Mécanique, Compiegne,


    Paper ID: STP33081S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP33081S


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