I have a question about the elastic energy of a torsion coil spring.
If the energy stored when twisting a metal rod is τ = kθ, then U = 1/2kθ^2, but in the case of the compression spring with the same expression M = kθ, is it okay to express its elastic energy U = 1/2kθ^2?
I am confused because the torsional moment and the bending moment in the compression spring cannot be distinguished.
It would be very helpful if you could tell me.
Thank you for your question, Spring Newbie!
The formula of elastic energy is as you wrote in your post.
The following are examples of springs that generate torsional and bending moments.
Torsional moment: Compression coil spring
Bending moment: Torsion coil springs
A compression coil spring is a straight wire wound in a spiral shape. When compressed, a twisting force acts on the wire, causing a torsional moment.
A torsion coil spring has a bending moment that bends the arm if we consider the force from the wire part.
If you have any other questions, please contact us!
