Rubber cylinder to hyperboloid

[Davide Recchia]

Hi All,

I have a cylindrical rubber piece that I want to twist into a hyperboloid.
I tried fixing a circular edge, and applying a rotational displacement of 10° to the other edge but
the deformation seems quite unrealistic. I would expect the necking to happen about halfway.
Also the required rotation is 30 deg, but solution won't converge.
Any tips on how to set up this problem is greatly appreciated.

Project files:

https://files.engineering.com/getfi...e-444b-8be9-5a1b4ea046a8&file=Twist_Seal.wbpz

Thanks

 

[Erik Panos Kostson]

And if it does not use transient dynamics (including some stabilisation as you did for the static case), and if that does not do it either then use explicit (quasi static)

 

[Davide Recchia]

Tried many times but found it impossible to get convergence using static structural for more than 30° rotation.

Eventually, I could get to twist 165° using Explicit Dynamics with damping control to remove unwanted dynamic effects.