STP791

    Influence of Specimen Size and Shape on the Singularity-Dominated Zone

    Published: Jan 1983


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    Abstract

    Improved computational methods have been used to determine, from photoelastic fracture patterns, those stress field parameters (in addition to the stress-intensity factor) that are associated with different fracture test specimen geometries. The variations with crack tip position of these nonsingular terms in modified-compact-tension and rectangular-double-cantilever-beam specimens have been studied. The results have been utilized to formulate criteria that can be used to quantify the concept of the singularity-dominated zone around a crack tip in specimens of finite dimensions.

    Keywords:

    fracture mechanics, photoelastic fracture patterns, stress-intensity factor determination, singularity-dominated zones, generalized Westergaard equations, test specimen geometries, specimen size requirements, nonsingular terms


    Author Information:

    Chona, R
    Instructor, visiting professor, and associate professor, University of Maryland, College Park, Md.

    Irwin, GR
    Instructor, visiting professor, and associate professor, University of Maryland, College Park, Md.

    Sanford, RJ
    Instructor, visiting professor, and associate professor, University of Maryland, College Park, Md.


    Paper ID: STP37084S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP37084S


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