Digital Image Correlation to Evaluate Shear Banding in Dilative Sands

    Volume 27, Issue 1 (January 2004)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 17 December 2003

    Page Count: 10


    Rechenmacher, AL
    Assistant Professor, The Johns Hopkins University, Baltimore, MD

    Finno, RJ
    Professor, Northwestern University, Evanston, IL

    (Received 24 October 2001; accepted 10 February 2003)

    Abstract

    Experimental results are presented of plane strain compression experiments on dense sands, in which the technique of Digital Image Correlation (DIC) was used to quantify localized displacements. The technique is described in detail. Results of accuracy tests of the DIC technique indicated that localized displacements were measured to an accuracy of ±0.008 mm. Typical DIC analyses produced approximately 250 displacement points within a shear band, which served as input for regression based strain computation, yielding highly accurate volumetric strain data for determining evolutions to critical state. Displacement data also were used to investigate volume changes outside the shear band. The DIC technique also enabled measurement of shear band inclination and thickness throughout the deformation process.


    Paper ID: GTJ11263J

    DOI: 10.1520/GTJ11263J

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    Author
    Title Digital Image Correlation to Evaluate Shear Banding in Dilative Sands
    Symposium , 0000-00-00
    Committee D18