Volume 3, Issue 4 (July 1975)

    An Extensometer for Circumferential Strains

    CODEN: JTEOAD

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    Abstract

    An instrument is described for measuring circumferential strains in plastic specimens of circular cross section. It consists of four direct-current differential transformers (DCDTs) suitably mounted on an invar ring. The DCDTs probe the position of the surface of the specimen at opposite ends of two mutually perpendicular diameters. Examples of performance are given for creep of a thin-walled tube of polyurethane.


    Author Information:

    Findley, WN
    Professor of engineering and technical assistant, Division of Engineering, Brown University, Providence, R.I.

    Reed, RM
    Professor of engineering and technical assistant, Division of Engineering, Brown University, Providence, R.I.


    Stock #: JTE10659J

    ISSN: 0090-3973

    DOI: 10.1520/JTE10659J

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    Author
    Title An Extensometer for Circumferential Strains
    Symposium , 0000-00-00
    Committee D20