A Constant Force System for Delayed Fracture Experiments

    Volume 9, Issue 5 (September 1981)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 4


    Wycherley, GW
    Experimental officer and senior technical officer, Materials Research Laboratories, Department of Defense, Ascot Vale, Victoria

    Henshall, SG
    Experimental officer and senior technical officer, Materials Research Laboratories, Department of Defense, Ascot Vale, Victoria

    Abstract

    A loading system has been developed to apply constant tensile forces to test pieces for delayed fracture investigations. The basic element of the system is a high compliance ring in which the test piece is loaded across the ring diameter after precompressing the ring in a universal testing machine. Details of ring compliance and forces achievable for rings cut from readily available pipes are given and simple techniques for monitoring the applied force are described. A reduction in cross-sectional area of 30 to 40%, consequent upon effective crack growth during testing, would result in about a 1% decrease in force for a ratio of compliances of ring to test piece of 5.5 to 1.


    Paper ID: JTE11518J

    DOI: 10.1520/JTE11518J

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    Author
    Title A Constant Force System for Delayed Fracture Experiments
    Symposium , 0000-00-00
    Committee E08