A bar having length L and uniform cross-section with area A is subjected to both tensile force P and torque T. If G is the shear modulus and E is the Young’s modulus, the internal strain energy stored in the bar is
1
\(\frac{{{T^2}L}}{{2GJ}} + \frac{{{P^2}L}}{{AE}}\)
2
\(\frac{{{T^2}L}}{{GJ}} + \frac{{{P^2}L}}{{2AE}}\)
3
\(\frac{{{T^2}L}}{{2GJ}} + \frac{{{P^2}L}}{{2AE}}\)
4
\(\frac{{{T^2}L}}{{GJ}} + \frac{{{P^{2L}}}}{{AE}}\)