A simply supported beam of span 'L' and flexural rigidity 'El’ is carrying a concentrated load 'W' at the mid span. Strain energy stored in this beam is given by
1
\(\frac{{{{\rm{W}}^2}{{\rm{L}}^2}}}{{96{\rm{EI}}}}\)
2
\(\frac{{{{\rm{W}}^2}{{\rm{L}}^3}}}{{96{\rm{EI}}}}\)
3
\(\frac{{{{\rm{W}}^2}{{\rm{L}}^3}}}{{48{\rm{EI}}}}\)
4
\(\frac{{{{\rm{W}}^2}{{\rm{L}}^2}}}{{48{\rm{EI}}}}\)