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Periodic Boundary Conditions

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Posts: 17
Topic starter
(@Denials)
Active Member
Joined: 13 years ago

Hello everybody, I could use some help.

I am trying to impose periodic boundary conditions on 2D RVE in Abaqus through *Equation and *Reference Point. This is working, but not completely. Problem is that displacements on opposite sides are same, but mirrored... I am not sure where am I mistaking. Any ideas?

Thanks a lot!

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Posts: 83
(@zhaiys)
Trusted Member
Joined: 17 years ago

[QUOTE=tlesicar,9815]Hello everybody, I could use some help.

I am trying to impose periodic boundary conditions on 2D RVE in Abaqus through *Equation and *Reference Point. This is working, but not completely. Problem is that displacements on opposite sides are same, but mirrored... I am not sure where am I mistaking. Any ideas?

Thanks a lot!

Sounds like a sign error in the constratint equation. If youre using *EQUATION to accomplish this, be advised that all terms are on the lefthand side of the equation, meaning that a constraint A=B should be phrased A-B=0.

Mats

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Posts: 17
Topic starter
(@Denials)
Active Member
Joined: 13 years ago

Thanks matsgd on your reply. The problem was in the equation. I tried to write equations for whole sets of the nodes and not single equation for every pair. Now Im stuck with generalized periodic boundary conditions. Has anybody experience with that?

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