It is pointed out that if the 70 percent and 95 percent points are used in fitting, the laboratory curve and the hyperbolic curve will compare vary well in this region but may differ seriously at low stress levels. The best overall fit between laboratory curves and hypergolas is obtained using the 50 percent and 95 percent points but the user should use points appropriate to the stress levels of major interest. Comment is made on the values of R sub f, and compaction conditions, and a linear failure equation. The use is unidacted of the log-log relationship to obtain a single analytic relationship through the stress range from 10 psi-1,000 psi. Both the tangent Poisson ration model and the hyperbolic model work well for samples compocted wet of optimum because they involve essentially constant values of Poissons ratio and thus degenerated into linear models in both cases. It is pointed out that the use of average axial strain and averate radial strain (derived from average values of volumetric and axial strains) is more likely to yield accurate results than the use of an average axial strain with the radial strain measured at a single point.

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  • Accession Number: 00133982
  • Record Type: Publication
  • Report/Paper Numbers: Proc. Paper #10869
  • Files: TRIS
  • Created Date: Jun 5 1976 12:00AM