Question

For a direct shear test on a dry sand, the following are given:

SPECIMEN SIZE: 75mm x 75mm x 30mm (height)

NORMAL STRESS: 200 kN/m2

SHEAR STRESS AT FAILURE: 180 kN/m2

a) Determine the angle of Internal Friction

b) For a normal stress of 150 kN/m2, what shear force is required to cause failure for the speciment?

Answer 1