The normal and shear stresses acting on one plane passing through a point in a soil mass are 120 psi compression and 25 psi, respectively. On an orthogonal plane, the respective stresses are 40 psi...

The normal and shear stresses acting on one plane passing through a point in a soil mass are 120 psi compression and 25 psi, respectively. On an orthogonal plane, the respective stresses are 40 psi compression and 25 psi.

(a) Draw the Mohr’s circle for this stress condition.

(b) What are the principal stresses?

(c) Determine the angle between the plane on which the 120 psi stress acts and the major principal plane.

(d) What is the maximum shear stress acting at the point?