New Method of Full-Field Stress Analysis and Measurement Using Photoelasticity

    Volume 33, Issue 6 (November 2010)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 2 September 2010

    Page Count: 13


    Dijkstra, Jelke
    Ir., Geo-Engineering Section, Delft Univ. of Technology, Delft,

    Broere, Wout
    Ir., Geo-Engineering Section, Delft Univ. of Technology, Delft,

    (Received 31 July 2009; accepted 28 July 2010)

    Abstract

    Photoelastic measurements provide a means to obtain a meaningful representation of the stress state in a granular material over the full area of a plane-strain sample without the need to place stress transducers inside the sample. This method uses the property of non-crystalline materials to become optically anisotropic when put under stress. To measure the resultant relative retardation of a light beam transmitted through a model built from glass grains and a liquid with a matching refractive index in the pores, a full-field polariscope has been built. This setup is able to characterize the stress state in the full-field of the sample with only seven intensity measurements. A plane-strain pile penetration test is used as an example.


    Paper ID: GTJ102672

    DOI: 10.1520/GTJ102672

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    Author
    Title New Method of Full-Field Stress Analysis and Measurement Using Photoelasticity
    Symposium , 0000-00-00
    Committee D18