Hmm, I didn't think of that, I would like to give it a go. The issue, though, is that the experimental data that I have is from springs with a square wire so I wouldn't be able to confirm if using a round wire gives the right results or not.
I hope I can get some help with this problem as I've been struggling with it for a long time. I have a helical tension spring with radius R and a square wire cross section and made of orthotropic material. I'm trying to derive an equation for the spring constant k by equating the energy stored...
