Torsional Shear Measurements of the Frictional Properties of Westerly Granite
Final rept. 1 Sep 1972-31 Jul 1974
UTAH UNIV SALT LAKE CITY DEPT OF MECHANICAL ENGINEERING
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Laboratory tests were conducted to measure the frictional properties of Westerly granite with ground surfaces. Torsional shear tests were conducted under confining pressure and axial stress. A strong dependency of the coefficient of friction on the state of stress was established, in addition to the usual dependency on normal stress. A three decade increase in the rate of shearing deformation showed no increase in coefficient of friction.
- Geology, Geochemistry and Mineralogy