STP740

    Stress Path Tests with Controlled Rotation of Principal Stress Directions

    Published: Jan 1981


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    Abstract

    University College London (UCL) has developed a new flexible boundary plane strain shear apparatus for investigating stress-strain-strength anisotropy in sands. Called the Directional Shear Cell (DSC), it has the unique capability of controlling the major principal stress direction by varying the normal stress and shear stress acting on four faces of a cubical sample constrained between two rigid end plattens. The paper describes the device and its use, and presents results from a Massachusetts Institute of Technology (MIT) test program run on dense and loose Leighton Buzzard Sand to independently evaluate the device and for comparison with data obtained at UCL to investigate the effects of induced anisotropy due to prestraining. The DSC has now been used to measure inherent anisotropy in loose sand. These data are presented and MIT's progress in modifying the DSC to enable K0 consolidated-undrained testing of soft clays is described.

    Keywords:

    anisotropy, deformation, drained shear tests, equipment, laboratory test measurement, sand, shear strength, soil structure, strain, strain measurements, stress path, stress strain curve, X-ray


    Author Information:

    Arthur, JRF
    Reader in Soil Mechanics, University College London, London,

    Bekenstein, S
    Research assistant, research assistant, and Professor of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

    Germaine, JT
    Research assistant, research assistant, and Professor of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

    Ladd, CC
    Research assistant, research assistant, and Professor of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Mass.


    Paper ID: STP28768S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP28768S


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