Volume 2, Issue 3 (March 2005)

    Construction of J-R Curves Using the Common and Concise Formats

    (Received 31 October 2003; accepted 23 March 2004)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    A new method for constructing J-R curves is presented, which directly generates the J-Δa relation in a closed, analytical form. This new method makes use of the Concise Format and the Common Format, both developed by Donoso and Landes. These formats relate load, P, to ligament length, b, and displacement — in the elastic and in the plastic deformation ranges, respectively — and have proved useful in calculations in fracture mechanics. Key to the method is the postulate of a “crack growth law” —a power-law relation between crack extension, Δa, and plastic displacement — used to express Jpl in terms of material properties, size parameters, and crack extension, giving rise to a Jpl-Δa analytical expression, similar to the power law J = CI(Δa)C2 suggested in ASTM Standard Test Method for Measurement of Fracture Toughness (E 1820). A few examples are included to show the use of the method, and comparisons are made with suggested in ASTM Standard Test Method for Measurement of Fracture Toughness (E 1820). A few examples are included to show the use of the method, and comparisons are made with J-Δa curves calculated as per ASTM E 1820.


    Author Information:

    Donoso, JR
    Universidad Técnica Federico Santa María, Valparaíso,

    Zahr, J
    Universidad Técnica Federico Santa María, Valparaíso,

    Landes, JD
    The University of Tennessee, Knoxville, TN


    Stock #: JAI12041

    ISSN: 1546-962X

    DOI: 10.1520/JAI12041

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    Author
    Title Construction of J-R Curves Using the Common and Concise Formats
    Symposium Fatigue and Fracture Mechanics: 34th Volume, 2003-11-21
    Committee E08