This beam having a circular cross section is given a mo

This beam having a circular cross section is given a moment M and Torque T . Small elements on the surface of the beam is taken as shown (ABCD) D is on the opposite of B. The direction of stresses ( normal and sheer) are shown for that of A. Show the diagrams for B and D.
A
B
C
(sheer)
(normal)
For A
For C
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