Torsional Shear Measurements of the Frictional Properties of Westerly Granite.

摘要

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. (Author)