A solid shaft is subjected to three forces and a torque as shown below. The diameter of the shaft is 40 mm. Determine (a) The principal planes and principal stresses at point H (shown below) (b) The maximum shear stress at point H (c) Sketch the stress blocks for parts (a) and (b) 350 N.m 0.2 m 0.15 m m 3 kN H 3 kN