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    Volume 9, Issue 2 (March 1981)

    Comparison of Methods for Fracture Toughness Determination in Steels

    CODEN: JTEOAD

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    Abstract

    This study compares various test methods and estimation procedures that are available for determining the fracture toughness of steels. The ASTM Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399), the energy rate test, and the multiple identical specimen crack growth resistance R curve test for elastic-plastic fracture toughness JIc determination are compared. Various formulations for plane-strain fracture toughness KIc and JIc estimation are also compared. Comparison of the test methods indicates that, for ductile steels, the multiple identical specimen R curve test is the most promising. It is suggested that the total areas be used for calculation of J from Rice's approximate formulation for three-point bend specimens of ductile steels and crack-contributed areas for brittle steel three-point bend specimens.


    Author Information:

    Cobanoglu, MM
    Professional engineer, Atomic Energy of Canada, Ltd., Engineering Co., Reactor Development Branch, Sheridan Park Research Community, Mississauga, Ontario

    Kardos, G
    Professor, Carleton University, Ottawa, Ontario


    Stock #: JTE11649J

    ISSN: 0090-3973

    DOI: 10.1520/JTE11649J

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    Author
    Title Comparison of Methods for Fracture Toughness Determination in Steels
    Symposium , 0000-00-00
    Committee E08