SIGNIFICANCE OF CYCLIC CONFINING STRESS IN REPEATED-LOAD TRIAXIAL TESTING OF GRANULAR MATERIAL

A number of research projects have been concerned with determining the nonlinear stress-strain characteristics of granular materials by using repeated-load triaxial tests. Improvements in materials testing equipment have lead to experiments in which the confining stress and the vertical stress were applied cyclically. There is an apparent difference in the resilient Poisson's ration determined under constant and under variable confining stresses. This difference is best explained by considering the behavior of granular materials in terms of volumetric stress-strain and shear stress-strain relationships. By doing this, one can show that Poisson's ratio is a function of the ratio of volumetric strain to shear strain. Resilient strains were investigated separetely from permanent strain because the permanent strain developed depended on the loading history of the sample and because the resilient behavior was not affected by any previous subfailure stress applications. To keep materials testing techniques simple, a constant confining stress equal to the mean value of a cyclic confining stress can be considered to be equal to the cyclic confining stress for determining the resilient modulus and permanent deformation.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/537/537-005.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=SIGNIFICANCE+OF+CYCLIC+CONFINING+STRESS+IN+REPEATED-LOAD+TRIAXIAL+TESTING+OF+GRANULAR+MATERIAL&author=S.+BROWN&author=A.+HYDE&publication_year=1975
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Strength and Deformation Characteristics of Pavement Sections. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • BROWN, S F
  • HYDE, AFL
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 49-58
• Monograph Title: Pavement and soil characteristics
• Serial:
  • Transportation Research Record
  • Issue Number: 537
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Deformation curve; Granular materials; Materials tests; Modulus of elasticity; Poisson ratio; Repeated loads; Resilience (Materials); Shear stress; Strain (Mechanics); Stresses; Triaxial shear tests
• Old TRIS Terms: Poissons ratio; Strains
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00126819
• Record Type: Publication
• ISBN: 0309023882
• Files: TRIS, TRB
• Created Date: Dec 16 1975 12:00AM