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Title: Kinetic shear strength of three rock types
Authors: Ehrgott, John Q., Jr. (John Qua), 1970-
Keywords: Kinetics
Shear strength
Soil mechanics
Surface roughness
Dynamic testing
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-83-3.
Description: Technical Report
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 the three rock types; however, there were significant differences in what is normally termed the residual value.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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