A metal hollow shaft is subject to a tensile load of 58kN

and a positive torsional moment (right hand rule) of 309Nm.

It has an outside diameter of 29mm, and a wall thickness of 6mm.

Sign Convention: Assume polor coordinates and positive shear acts anticlockwise on the torsion plane.

For a stress element on the outside surface of the tube, determine:

the Maximium in-plane Principal Stress (Answer in MPa).

the Minimum in-plane Principal Stress (Answer in MPa ).

the Principal Angle (Answer in degress).

the Maximum in-plane Shear (Answer in Pa).

Select the 4 correct answers from the list below/: