STP1131: Comparison of Mixed-Mode Stress-Intensity Factors Obtained Through Displacement Correlation, J-lntegral Formulation, and Modified Crack-Closure Integral

    Bittencourt, TN
    Graduate students and professor of Structural Engineering, School of Civil and Environmental Engineering and Program of Computer Graphics Fracture Group, Cornell University, Ithaca, NY

    Barry, A
    Graduate students and professor of Structural Engineering, School of Civil and Environmental Engineering and Program of Computer Graphics Fracture Group, Cornell University, Ithaca, NY

    Ingraffea, AR
    Graduate students and professor of Structural Engineering, School of Civil and Environmental Engineering and Program of Computer Graphics Fracture Group, Cornell University, Ithaca, NY

    Pages: 14    Published: Jan 1992


    Abstract

    This paper presents a comparison among stress-intensity factors for mixed-mode two-dimensional problems obtained through three different approaches: displacement correlation, J-integral, and modified crack-closure integral. All mentioned procedures involve only one analysis step and are incorporated in the post-processor page of a finite element computer code for fracture mechanics analysis (FRANC). Results are presented for a closed-form solution problem under mixed-mode conditions. The accuracy of these described methods then is discussed and analyzed in the framework of the their numerical results. The influence of the differences among the three methods on the predicted crack trajectory of general problems is also discussed.

    Keywords:

    stress-intensity factors, linear elastic fracture mechanics, displacement correlation, J, -integral, modified crack closure, local mesh refinement, crack trajectory, history of stress-intensity factors, fracture mechanics, fatigue (materials)


    Paper ID: STP23698S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP23698S


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