Influence of Dimensions of the Center-cracked Tension Specimen on Kc

    Published: Jan 1972

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    The fracture resistance of three high strength aluminum alloys, two titanium, and one steel alloy has been investigated with a center-cracked tension specimen. Specimen geometric dimensions such as width, thickness, and crack length, together with yield strength were studied to ascertain their influence on the Kc parameter. The specimen thicknesses ranged from 1/16 to 1/18 in., width from 3 to 12 in., and crack length from 0.5 to 7 in.

    The Kc parameter has been found to be unaffected by specimen width and crack length provided the width dimension is sufficient and the crack length/width ratio is within the range of 0.15 to 0.5. The fracture resistance is dependent upon sheet thickness and inversely proportional to yield strength.


    fracture (materials), failure (materials), stresses, fracture strength, toughness, crack initiation, yield strength, crack propagation, tension tests, alloy steels, aluminum alloys, titanium alloys

    Author Information:

    Freed, CN
    Naval Research Laboratory, Washington, D.C.

    Sullivan, AM
    Naval Research Laboratory, Washington, D.C.

    Stoop, J
    Naval Research Laboratory, Washington, D.C.

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP38821S

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