Comparisons of Fracture Toughness Measurements by the Short Rod and ASTM Standard Method of Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399-78)

    Volume 8, Issue 3 (May 1980)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 6


    Barker, LM
    Senior staff consultant, Terra Tek, Inc., Salt Lake City, Utah.

    Baratta, FI
    Research mechanical engineer, Army Materials and Mechanics Research Center, Watertown, Mass.

    Abstract

    A multilaboratory blind comparison testing program evaluated the accuracy of the short rod method of measuring the fracture toughness of metallic materials. Valid comparisons between values measured according to ASTM Standard Method of Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399-78) and values of the plane-strain critical stress intensity factor as measured by the short rod method of fracture toughness measurement (KIcSR) were obtained for several steels, aluminum alloys, and titanium. The KIcSR values measured by the short rod method were consistently low, averaging 6% below the measurements according to ASTM Standard Method E 399. A 4% adjustment in the short rod calibration constant that had been previously evaluated only to ±7% brings the two sets of measurements into very good agreement. The short rod method thus appears to be a viable alternative for measuring the fracture toughness of metallic materials.


    Paper ID: JTE10604J

    DOI: 10.1520/JTE10604J

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    Author
    Title Comparisons of Fracture Toughness Measurements by the Short Rod and ASTM Standard Method of Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399-78)
    Symposium , 0000-00-00
    Committee E08