The Effect of Cone Angle on Penetration Resistance

Abstract

Cone penetrometers offer a relatively quick and simple method of measuring in situ soil strength properties. Despite the wide use of cone penetrometers, only approximate theories are available to evaluate the shear strength parameters from the measured cone penetration resistance or 'cone index'. In this memorandum a theoretical analysis, based on the numerical solution of the differential equations of plasticity, is presented that takes into account correctly both the axial symmetry and the friction at the surface of the cone. The resistance of penetrometers having various cone apex angles is determined by this method for a range of soil properties. The computed cone indices are compared with those measured in the laboratory.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
AD0735788

Entities

People

  • Edward A. Nowatzki
  • Leslie L. Karafiath

Organizations

  • Grumman

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Bearing Capacity
  • Bearings
  • Boundaries
  • Compressive Properties
  • Differential Equations
  • Equations
  • Friction
  • Geometry
  • Internal Friction
  • Materials
  • Mechanical Properties
  • Mechanics
  • Penetrometers
  • Physical Properties
  • Plastic Properties
  • Security
  • Three Dimensional

Readers

  • Fluid Dynamics.
  • Materials Science (Mechanical Engineering).
  • Psychometric Testing or Psychological Assessment.