THE INFLUENCE OF BOUNDARIES ON THE VOLUMETRIC BEHAVIOR OF SOLID AND HOLLOW CYLINDRICAL SPECIMENS OF GLASS BEADS

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概要

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• Laboratory shear tests were conducted on moderately dense assemblies of large and small glass beads in both solid and hollow cylindrical triaxial devices using either stress-controlled or strain-controlled lateral boundaries. The specimens were sheared in triaxial compression and extension, maintaining the mean stress constant, and volume strains were monitored. The results indicated that the mold used in preparing the specimen created a strong but localized ordering of particles at the boundary and that this type of initial fabric had an important effect on the volumetric behavior of the hollow cylinder specimens. There were also indications that the strain-controlled and the stress-controlled boundaries produced significantly different volume strains at the initial stage of shearing and that increasing the degree of strain-control decreased the amount of initial contraction. In order to compliment these observations, additional triaxial compression and extension tests were carried out with a series of solid cylindrical specimens of different diameters using the small glass bead assembly. The mean stress was again fixed and care was taken to eliminate friction at the top and bottom boundaries. In triaxial extension, the smaller diameter specimens exhibited densification greater than that of the larger diameter specimens. In triaxial compression, the volume change was approximately the same for all diameter specimens. These results support the presence of an initial local anisotropy associated with the mold and indicate that specimens should be at least 150 particle diameters in thickness in order that this anisotropy be negligible.

• 社団法人地盤工学会の論文
• 1996-06-15

著者

• Jenkins James

  Department Of Theoretical And Applied Mechanics Cornell University

• Parker Iv

  Respectivery Department Of Civil And Environmental Engineering Old Dominion University

• Ishibashi I

  Respectivery Department Of Civil And Environmental Engineering Old Dominion University

• Jenkins James

  Department Of Mathematics Washington University

• Choi Jong

  Respectivery Department Of Civil And Environmental Engineering Old Dominion University

• ISHIBASHI ISAO

  respectivery, Department of Civil and Environmental Engineering, Old Dominion University

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• Stress and Strain in Flat Piling of Disks (Condensed Matter : Structure, Mechanical and Thermal Properties)
• THE INFLUENCE OF BOUNDARIES ON THE VOLUMETRIC BEHAVIOR OF SOLID AND HOLLOW CYLINDRICAL SPECIMENS OF GLASS BEADS
• On the existence of certain general extremal metrics II
• On the local behavior of certain homeomorphisms

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