DIFFERENCE IN TRIAXIAL AND PLAIN STRAIN SHEAR STRENGTH

The influence of the intermediate principal stress on the shear strength of cohesionless soils is treated by Leussink and Wittke, who present an investigation of the difference of triaxial and plane-strain shear strength of ball packings to simulate the behavior of granular materials. Theoretical solutions are obtained for the principal stress ratio and eformation of equal rough spheres in either quadratic or hexagonal packing of various densities. Experiments with glass balls give some qualitative support of the theoretical strength relationships, which indicate that the plane-strain compressive strength is greater than the triaxial strength, but the observed strengths are only about one-half of the estimates for the same porosity and roughness of the balls. This difference appears to be largely due to inadequate allowance for volumetric strains in the theory, as shown by the much greater experimental specimen deformations before failure is reached compared with the theoretical values, especially for greater densities of packing.

  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Leussink, H
    • Wittke, W
  • Publication Date: 1963-9

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Filing Info

  • Accession Number: 00095094
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 7 1975 12:00AM