STP977

    True Triaxial Test of Rock Under Stress and Strain Rate Control

    Published: Jan 1988


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    Abstract

    The significance of true triaxial tests instead of conventional tests has been enhanced because of the need for generalized constitutive laws for geomaterials. To investigate the behavior of rock masses having restricted conditions for strains, tests of marble under strain rate control as well as stress rate control were performed using a specially designed true triaxial apparatus with rigid platens. As an example of a set of restricted conditions, the condition of the mean principal strain being constant was adopted when the octahedral shear strain was increased. The direction of stress paths obtained under these conditions is discussed, along with the elastic, dilatant, and contractile behavior of marble as clarified by stress controlled tests.

    Keywords:

    true triaxial tests, rock, stress rate control, strain rate control, mean principal strain, mean principal stress, octahedral shear strain, octahedral shear stress, stress path, constitutive laws, rigid platens, flexible membranes


    Author Information:

    Esaki, T
    Associate professor and professor of Faculty of Engineering, Kyushu University, Fukuoka,

    Kimura, T
    Research associate of Department of Mining, Kyushu University, Fukuoka,

    Aoki, K
    Senior research officer of National Research Institute for Pollution and Resources, MITI, Tsukuba,

    Nishida, T
    Associate professor and professor of Faculty of Engineering, Kyushu University, Fukuoka,


    Paper ID: STP29118S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29118S


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