Question

Strain energy in torsion of a shaft per unit volume is given by (q is maximum shear stress, E-modulus of Elasticity and G is modulus of rigidity)

• A. $\frac{q^2}{2G}$
• B. $\frac{q^2}{2E}$
• C. $\frac{q^2}{4G}$
• D. $\frac{q^2}{4E}$

Answer 1

The correct option is C $\frac{q^2}{4G}$

Strain energy per unit volume for solid shaft

$=\frac{q_{max}^2}{4G}$