Stress Concentration Factor Formulas Useful for All Notch Shapes in a Flat Test Specimen Under Tension and Bending

    Volume 30, Issue 5 (September 2002)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 13


    Noda, NA
    Kyushu Institute of Technology, Tobata, Kitakyusyu,

    Takase, Y
    Kyushu Institute of Technology, Tobata, Kitakyusyu,

    (Received 20 July 2001; accepted 27 April 2002)

    Abstract

    In this work, stress concentration factors Kt for a flat bar with circular-arc or V-shaped notches are considered based on the exact solutions for special cases and accurate numerical results. Then, a set of Kt formulas useful for any notch shape is proposed. The conclusions can be summarized as follows. For the limiting cases of deep (d) and shallow (s) notches, the body force method is used to calculate the Kt values. Then, the formulas are obtained as Ktd and Kts. Next, the notch shape is classified into several groups according to the notch radius and notch depth. Then, the least squares method is applied for calculation of Kt/Ktd and Kt/Kts. Finally, convenient formulas are proposed that are useful for any notch shape in a flat test specimen. The formulas yield stress concentration factors with less than 1% error for any notch shape in a flat test specimen.


    Paper ID: JTE12327J

    DOI: 10.1520/JTE12327J

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    Author
    Title Stress Concentration Factor Formulas Useful for All Notch Shapes in a Flat Test Specimen Under Tension and Bending
    Symposium , 0000-00-00
    Committee D30