STP601

    Derivation of a Low-Cycle Fatigue Relationship Employing the J-Integral Approach to Crack Growth

    Published: Jan 1976


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    Abstract

    Some recent results from investigations in nonlinear fracture mechanics centering about the J-integral are utilized to derive a low-cycle fatigue relationship. The derived relationship has the form of the well-known Coffin-Manson equation, but differs from it in that the controlling variable is predicted to be applied strain energy density rather than plastic strain range. This predicted controlling variable appears to closely parallel several energy-related functions proposed during the past 15 year period.

    Keywords:

    crack propagation, fractures (materials), stresses, cracks, plastic properties


    Author Information:

    Mowbray, DF
    Manager, Mechanics of Materials, Materials and Processes Laboratory, General Electric Company, Schenectady, N.Y.


    Paper ID: STP28636S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP28636S


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