Symmetric boundary condition help

[matonking]

Hello,

I'm working on a hyperelastic model that consists of a sheet of rubber. It's undergoing uniaxial tension so there are 3 planes of symmetry which allows me to model only 1/8th of the sheet. (The sheet is cut into 4 sections and one of those sections is cut into 4 again)

My question is:

I'm used to modelling linear elastic/general structural problems with fairly simple planes of symmetry. I've not handled hyperelastic simulations before so I don't intuitively see the appropriate boundary conditions for each side when modelling for symmetry.

Can you point me in the right direction? Do I just restrain perpendicular translations but allow rotations or what?

Cheers in advance,

Matonking

 

[IceBreakerSours]

Firstly, you can run a simulation and see if the deformation state is uniaxial.

Secondly, depending on the type of elements you choose, you may/may not have to constrain rotations.



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