STP1171

    Influence of Specimen Size on J-, Jm- and δ5-R-Curves for Side-Grooved Compact-Tension Specimens

    Published: Jan 1993


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    Abstract

    The influence of specimen size and geometry on R-curves has been studied for a pressure vessel steel and an aluminum alloy using side-grooved compact-tension specimens. The specimen thickness reduction (necking) was used to quantify changes of constraint in laboratory specimens. The results show that the crack tip opening displacement, δ5, and the modified J-integral Jm, can correlate significantly more stable crack growth than the conventional J-integral.

    Keywords:

    R, -curves, J, -integral, modified , J, -integral, crack tip opening displacement, size dependence, necking of specimens, constraint, validity range


    Author Information:

    Heerens, J
    GKSS-Research Centre Geesthacht, Max-Planck-Strasse, Geesthacht,

    Schwalbe, K-H
    GKSS-Research Centre Geesthacht, Max-Planck-Strasse, Geesthacht,

    Nix, C
    GKSS-Research Centre Geesthacht, Max-Planck-Strasse, Geesthacht,


    Paper ID: STP18040S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP18040S


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