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    An Experimental Investigation of the T Stress Approach

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    Many investigations have identified geometry dependence of Jc at initiation of cleavage fracture and Ji at initiation of fibrous tearing. This geometry dependence is predictable from elastic-plastic finite element analyses, which show that the crack tip stress-strain distribution is not always uniquely defined by J. This paper investigates the ability of the elastic T stress to explain experimentally observed trends in Jc with changes in specimen geometry. Data on mild steel three-point bend and center-cracked tension specimens are presented.


    fracture, J, T, stress, mild steel, three-point bend specimens, center-cracked tension specimen

    Author Information:

    Sumpter, JDG
    Senior principal scientific officer, Admiralty Research Establishment, Dunfermline,

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP18042S