Volume 20, Issue 6 (November 1992)

    Effects of Notch Length on the Ductile Fracture of a Center-Notched Low Carbon Steel Plate

    (Received 20 June 1991; accepted 20 March 1992)

    CODEN: JTEOAD

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    Abstract

    Ductile fracture of a thin-notched specimen deformed to plastic collapse was investigated by observing crack growth on the specimen surface. A correlation between the ductile crack growth and the initial notch length was obtained. It was found that: (1) the crack growth rate, da/dε, for the strain increment depends on the crack length, a, and the nondimensionalized crack growth rate, (da/dε)/a, is faster for short notch lengths; (2) crack opening displacement, δ, measured in the vicinity of the crack tip was also dependent on the crack length and the notch length; (3) the crack opening rate, dδ/da, was inversely proportional to the crack length. Thus, the variation of crack opening displacement was found to have a good correlation with the crack growth rate.


    Author Information:

    Makabe, C
    Associate professor and professor, University of the Ryukyus, Nishihara, Okinawa,

    Kaneshiro, H
    Associate professor and professor, University of the Ryukyus, Nishihara, Okinawa,


    Stock #: JTE11934J

    ISSN: 0090-3973

    DOI: 10.1520/JTE11934J

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    Author
    Title Effects of Notch Length on the Ductile Fracture of a Center-Notched Low Carbon Steel Plate
    Symposium , 0000-00-00
    Committee E08