You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 40, Issue 1 (January 2017)

    Adaptation of Broadband Simple Shear Device for Constant Volume and Stress-Controlled Testing

    (Received 16 August 2015; accepted 24 August 2016)

    Published Online: 2017

    CODEN: GTJODJ

      Format Pages Price  
    PDF (2.9M) 14 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    We adapted an existing digitally controlled simple shear device, originally designed for drained testing with strain-control, to perform constant height testing under strain- or stress-controlled conditions. The re-designed system provided PID control of horizontal displacements or loads coupled with either vertical force or displacement control (for drained and constant-volume testing, respectively). The new system had substantially similar horizontal displacement control capabilities as the previous system. The tracking error under stress-controlled loading depends on amplitude and frequency of the load; however, its value was almost the same as errors in strain-controlled tests for common shear strain/stress amplitudes. High-precision vertical control was achieved during constant height testing in two respects: (1) height change was small (less than 0.05 % of the specimen height for large shear-strain tests), even at high frequencies; and (2) top cap rocking was small, with the vertical displacements due to rocking at the specimen edge being half or less than average changes in specimen height.


    Author Information:

    Shafiee, A.
    Shannon & Wilson, Inc., Glendale, CA

    UCLA Dept. of Civil & Environmental Engineering,

    Stewart, J. P.
    Dept. of Civil and Environmental Engineering, Univ. of California, Los AngelesLos Angeles, CA

    Venugopal, R.
    US Technical Services, OPAL-RT Corp., Brighton, MI

    Brandenberg, S. J.
    Dept. of Civil and Environmental Engineering, Univ. of California, Los AngelesLos Angeles, CA


    Stock #: GTJ20150181

    ISSN:0149-6115

    DOI: 10.1520/GTJ20150181

    Author
    Title Adaptation of Broadband Simple Shear Device for Constant Volume and Stress-Controlled Testing
    Symposium ,
    Committee D18