36. A 20-mm-diameter rod made of a ductile material with a yield strength of 350 MPa is subject to a torque of T = 100 N • m and a bending moment of M = 150 N • m. An axial tensile force P is then gradually applied. What is the value of the axial force when yielding of the rod occurs?

Solve the problem in two ways using:

(a) the maximum shear stress theory and

(b) the maxi¬

mum distortional energy theory.

A v Mz T -(L Mz £7-