Kinetic Shear Strength of Three Rock Types

Abstract

There has been little research into the kinetic friction developed between surfaces of rapidly moving geologic materials. This report documents the results of laboratory friction tests conducted on prepared surfaces of a limestone, a dolomite, and a sandstone. The laboratory tests were conducted in a dynamic friction device in which one hollow cylindrical specimen was rotated while another specimen was pushed into it. The rate of rotation could be varied from 0.15 in./min to greater than 40,000 in./min. The data from tests conducted at the slow speeds are shown to agree with previously documented data. Tests conducted at the fast speeds indicated little difference (within scatter) in the initial values of friction in any of three rock types; however, there were significant differences in what is normally termed the residual value.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1983
Accession Number
ADA132692

Entities

People

  • John Q. Ehrgott

Tags

Communities of Interest

  • Advanced Electronics
  • Cyber

DTIC Thesaurus Topics

  • Chemical Reactions
  • Dynamic Tests
  • Engineering
  • Engineers
  • Friction
  • Instrumentation
  • Load Cells
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Recording Systems
  • Reservoirs
  • Roughness
  • Shear Strength
  • Surface Properties
  • Surface Roughness

Readers

  • Geotechnical Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).