Question

If a shaft is simultaneously subjected to a torque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is given by

• A. 2M/T
• B. M/T
• C. 2T/M
• D. T/M

Answer 1

The correct option is A 2M/T

$Maximumbendingstress,{\sigma }_b=\frac{32M}{\pi d^3}$

$Maximumshearstress,\tau =\frac{16T}{\pi d^3}$

$\frac{{\sigma }_d}{\tau }=$$\frac{2M}{T}$