Obtain a formula for the strain energy U of the statically indeterminate circular bar shown in the

Question:

Obtain a formula for the strain energy U of the statically indeterminate circular bar shown in the figure. The bar has fixed supports at ends A and B and is loaded by torques 2T0 and T0 at points C and D, respectively.
Use Eqs. 3-46 a and b of Example 3-9, Section 3.8, to obtain the reactive torques.