STP977

    A Computer Controlled Hydraulic Triaxial Testing System

    Published: Jan 1988


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    Abstract

    A computer controlled hydraulic triaxial testing system is introduced. A desktop computer is linked to a hydraulic triaxial cell via three microprocessor controlled hydraulic actuators and two subsystems, one for the measurement of axial deformation and the other for the measurement of pore pressure. The separate system elements and subsystems are described in detail. The operation of the system is described, and control algorithms are explained with particular reference to K0 consolidation and swelling and automatic testing rate by controlled hydraulic gradient. System performance is illustrated by reference to published data describing K0, stress path, cyclic loading, and triaxial extension tests. The advantages of the system are summarized.

    Keywords:

    computer control, digital controller, saturation ramps, isotropic and anisotropic consolidation, conventional tests, triaxial extension, K, 0, consolidation and swelling, stress paths, cyclic loading, automatic drained testing rate, data presentation, repeatability, software based


    Author Information:

    Menzies, BK
    Director, GDS Instruments Ltd., Egham, Surrey,


    Paper ID: STP29070S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29070S


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