Machine Design

For a circular shaft of diameter $d$ subjected to pure torsion $T$, the maximum shear stress at the outer surface according to the torsion formula is:

Options:

• (A) $\frac{16 T}{\pi d^3}$
• (B) $\frac{32 T}{\pi d^3}$
• (C) $\frac{16 T}{\pi d^4}$
• (D) $\frac{64 T}{\pi d^3}$