I have done it by volume density method, I found out volume density by 1/2(stress)(strain) and multiplied by volume, but if you all have any sort of different method then please share.
Not by volume density but energy density.
Is the answer \pi D^2Yx^2/20l?
Yes, is it by a different method or the energy density method?
I converted them to springs using K=AY/L for easy calculation? It was a 4 line calculation. Is that what you call energy density method?
Show the working please.
Thanks, was a lot shorter than mine.
Can anyone try like finding force as a function of elongation X and then finding work, I will try that later but too lazy to try now.