Rotation Corrections in Three-Point Single Edge Notch Bend Specimens

    Volume 17, Issue 6 (November 1989)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 13


    Perez Ipiña, JE
    Adjunct Professor, Universidad Nacional del Comahue, Neuquen,

    Santarelli, EL
    Assistant Researcher, Universidad Nacional del Comahue, Neuquen,

    (Received 21 March 1988; accepted 11 April 1989)

    Abstract

    In elastic-plastic fracture toughness tests of three-point single edge notch bend (3P-SENB) specimens, very ductile materials suffer significant distortions from their initial geometrical configuration, producing large rotation angles of the arms and causing the rollers to move out and detach themselves. These effects should be taken into account when the Unloading Compliance Method is employed to obtain the slow stable crack growth, because the equations are calculated for the initial condition of null rotation angles.

    Experimental measurements of the span change for 3P-SENB specimens with different rotation angles and under several conditions were obtained. The results were compared with other authors' results and with those corresponding to CT specimens. Expressions for the corrected values of span and compliance were deduced, and the errors for not using the corrections were estimated. Conditions that give minimal errors were also documented.


    Paper ID: JTE11145J

    DOI: 10.1520/JTE11145J

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    Author
    Title Rotation Corrections in Three-Point Single Edge Notch Bend Specimens
    Symposium , 0000-00-00
    Committee E08