A power transmission solid shaft of diameter d, length l and rigidity modulus G is subjected to a pure torque. The maximum allowable shear stress is τmax . The maximum strain energy/unit volume in the shaft is given by:
1
\(\frac {\tau_{max}^2 }{4G}\)
2
\(\frac {\tau_{max}^2 }{2G}\)
3
\(\frac {2\tau_{max}^2 }{3G}\)
4
\(\frac {\tau_{max}^2 }{3G}\)