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    STP1020

    Intersection of Surface Flaws with Free Surfaces: An Experimental Study

    Published: 01 January 1989


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    Abstract

    A series of frozen stress experiments was conducted on surface flaws of varying aspect ratios in finite-thickness plates in order to study the practical aspects of the well-known loss of the inverse square-root singularity when the flaw borders intersect the free surface. Optical data are converted into classical stress-intensity factors ignoring and accounting for the above-noted effect and compared with a well-established numerical result. Results are discussed regarding their usefulness to both the research and practicing engineer.

    Keywords:

    linear elastic fracture mechanics (LEFM), stress singularity, stress intensity factor (SIF), frozen stress photoelasticity, free-surface effects, dominant eigenvalues


    Author Information:

    Smith, CW
    Alumni professor, graduate research assistant, and graduate research assistant, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Theiss, TJ
    Alumni professor, graduate research assistant, and graduate research assistant, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Rezvani, M
    Alumni professor, graduate research assistant, and graduate research assistant, Virginia Polytechnic Institute and State University, Blacksburg, VA


    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP18830S