STRAIN INCREMENT AND STRESS DIRECTION IN TORSION SHEAR TESTS

A study is described which used a torsion shear apparatus in which there is individual control of vertical normal stress, confining pressure, and shear stress applied to a hollow cylinder specimen. Undrained and drained torsion shear tests on hollow cylinder specimens of Edgar plastic kaolinite clay were performed along vaious stress paths in order to study the relations among the directions of major principal stress axes. The clay prepared by K sub o -consoliation of a slurry was found to exhibit little anisotropy. The major principal strain increment directions coincided with the major pricipal stress directions at failure. Thus isotropic plasticity theory may be applied for modeling the behavior of this clay at failure. The results also showed that the directions of major principal strain increment essentially coincided with the directions of major principal stress increment at small stress levels inside the isotropic yield surface.

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• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Hong, W P
  • Lade, P V
• Publication Date: 1989-10

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 1388-01
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 115
  • Issue Number: 10
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Clay; Kaolinite; Plastic deformation; Principal stresses; Shear tests; Slurry; Strain (Mechanics); Stresses; Torsion tests
• Old TRIS Terms: Principal stress; Shear apparatus; Slurries; Strains
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00489371
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 30 1989 12:00AM