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Torsion - applying as to change length of part!


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I'm struggling with a concept we are trying to run.

We have created a spring, cut from a cylindrical pipe and we wish to apply torsion so as to tighten it up, therefore reducing its diameter and increasing it's length BUT maintaining the same pitch.

The profile is a 1" wide rectangle and our aim is to ensure it maintains its pitch so that, in our application, we essentially wind it up to fit onto a smaller diameter and need to represent the two states.

Can this be done? I tried to figure it out using adaptive springs to give me the sizes I need but couldn't quite get it to work, so hopefully someone can shed some light on this for me!


I hope the image helps to show what I'm aiming to do.


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