STP977

    Effects of Height-to-Diameter Ratio in Triaxial Specimens on the Behavior of Cross-Anisotropic Sand

    Published: Jan 1988


      Format Pages Price  
    PDF Version (192K) 9 $25   ADD TO CART
    Complete Source PDF (16M) 9 $132   ADD TO CART


    Abstract

    The drained stress-strain, volume change, and strength behaviors of sand with cross-anisotropic fabric were studied in triaxial compression tests. Dense specimens with square cross-sections, height-to-diameter (H/D) ratios of 1.0 and 2.5, and lubricated ends were employed. Specimens consisting of relatively long, flat sand grains were prepared with cross-anisotropic grain structure, whose axis of rotation was inclined at various orientations from vertical to horizontal. The specimen boundary conditions (flexible membrane and lubricated, rigid end plates) had different effects on the results for specimens with H/D = 1.0 and 2.5. The specimens with H/D = 2.5 exhibited distinct, but temporary drops in their prefailure stress-strain curves, and the friction angles changed in a consistent pattern over a range of 5.5°. In comparison, the specimens with H/D = 1.0 showed more smooth stress-strain behavior, and their friction angles were essentially constant with very little effect of orientation.

    Keywords:

    anisotropic, boundary condition, dilation, failure, laboratory test, mechanical properties, sands, shear strength, soil mechanics, stress-strain curve, triaxial test


    Author Information:

    Lade, PV
    Professor and former graduate student, School of Engineering and Applied Science, University of California, Los AngelesCA,

    Wasif, U
    Professor and former graduate student, School of Engineering and Applied Science, University of California, Los AngelesCA,


    Paper ID: STP29109S

    Committee/Subcommittee: D18.09

    DOI: 10.1520/STP29109S


    CrossRef ASTM International is a member of CrossRef.