Accession Number:

AD0735788

Title:

The Effect of Cone Angle on Penetration Resistance

Descriptive Note:

Research memo.

Corporate Author:

GRUMMAN AEROSPACE CORP BETHPAGE NY RESEARCH DEPT

Personal Author(s):

• Nowatzki, Edward A.
• Karafiath, Leslie L.

Report Date:

1972-01-01

Pagination or Media Count:

31.0

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.

Descriptors:

• *CONICAL BODIES
• *SOIL MECHANICS
• *TEST EQUIPMENT
• INTERNAL FRICTION
• NUMERICAL ANALYSIS
• PENETRATION
• SHEAR STRESSES
• SOILS
• TEST METHODS
• TRAFFICABILITY

Subject Categories:

• Soil Mechanics
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE