Question

A long shaft of diameter d is subjected to twisting moment T at its ends. The maximum normal stress acting at its cross-section is equal to

• A. Zero
• B. $\frac{16T}{\pi d^3}$
• C. $\frac{32T}{\pi d^3}$
• D. $\frac{64T}{\pi d^3}$

Answer 1

The correct option is A Zero

Cross section of the shaft is the section perpendicular to the longitudinal axis of shaft. In case twisting moment acting at its ends, on the cross section only shear stress acts, normal stress is zero.