question_answer

Which one of the following gives the correct expression for strain energy stored in a beam of length L and of uniform cross-section having moment of inertia I and subjected to constant bending moment M?

A) \[\frac{ML}{EI}\]                                  

B) \[\frac{ML}{2EI}\]

C) \[\frac{{{M}^{2}}L}{EI}\]                   

D) \[\frac{{{M}^{2}}L}{2EI}\]