A Cleavage Precracking Technique for Sheet Steel Fracture Specimens

    Volume 16, Issue 1 (January 1988)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 5


    Clayton, JQ
    Aeronautical Research Laboratories, G.P.O. Melbourne,

    Rogers, CB
    Aeronautical Research Laboratories, G.P.O. Melbourne,

    (Received 4 August 1986; accepted 22 May 1987)

    Abstract

    A technique is described for the preparation of sheet steel fracture specimens containing a cleavage precrack instead of the usual fatigue precrack. Since the cleavage precrack can provide a high level of stress concentration and is free from cyclic-loading damage, such specimens are useful in the investigation of various fracture processes and mechanisms. The production technique involves low-temperature biaxial loading of a specimen blank to produce a cleavage crack extension, then separation of the specimen from the blank by electrical-discharge-machining (EDM). The stresses used to control the cracking are analyzed and discussed.


    Paper ID: JTE11049J

    DOI: 10.1520/JTE11049J

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    Author
    Title A Cleavage Precracking Technique for Sheet Steel Fracture Specimens
    Symposium , 0000-00-00
    Committee E08