ABSTRACT
Solution The failure shear stresses 'if as obtained from the tests are plotted against the normal stresses cr, in Figure Ex 8.2. The shear parameters from the graph are: c = 0, l/J = 37.8 0 •
Example 8.3 A direct shear test, when conducted on a remolded sample of sand, gave the following observations at the time of failure: Normal load = 288 N; shear load = 173 N. The cross sectional area of the sample = 36 cm2•
Determine: (i) the angle of internal friction, (ii) the magnitude and direction of the principal stresses in the zone of failure.
