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    STP1060

    Analysis of Optical Measurements of Free-Surface Effects on Natural Surface and Through Cracks

    Published: 01 January 1990


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    Abstract

    After briefly reviewing the algorithms used to convert experimental data into fracture parameters, experimental results are presented from experimental studies conducted on both compact bending specimens containing mutually grown “thumbnailed” cracks through the thickness and naturally grown surface flaws in wide plates. Results are compared with analytical results and are used to explain certain phenomena observed with both thumb-nailing of cracks in compact bending specimen and in the analyzing of surface flaws.

    Keywords:

    fracture mechanics, optical stress analysis, crack border-free surface intersection effects, experimental stress-intensity factors, dominant eigenvalues


    Author Information:

    Smith, CW
    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

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


    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP23429S