The strain energy stored in a solid circular shaft subjected to shear stress ($$\tau $$), is:
(Where, G = Modulus of rigidity for the shaft material)
A. $$\frac{{{\tau ^2}}}{{2G}}$$ × Volume of shaft
B. $$\frac{\tau }{{2{\text{G}}}}$$ × Volume of shaft
C. $$\frac{{{\tau ^2}}}{{4G}}$$ × Volume of shaft
D. $$\frac{\tau }{{4{\text{G}}}}$$ × Volume of shaft
Answer: Option A
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