I am new to FEA constraining and I can not seem to properly constrain my model. I have a public project with a lot of confusing errors for all the sim runs I have tried for my static nonlinear simulation with Pressure following. The object is basically a pressurized balloon. I have made the geome…

Hi @DaleKramer , there seems so be an issue specific to constraints on single nodes - until it’s fixed I would propose a setup that is similar as in my project - just with an additional symmetry but still with the remote displacement on the node - now only constraining Z. Best, Richard

Thanks Richard. Your constraints still confuse me. You don’t seem to have a symmetry plane boundary condition at all, you simply constrain the faces on what should be a symmetry plane such that the faces can not move off that plane. What is the purpose of the ‘Symmetry plane’ boundary condition i…

Hi @DaleKramer , I try to avoid the symmetry BC as it sometimes can lead to numerical troubles together with other BCs on shared nodes. So as long as the faces which I want to put a symmetry BC on are orthogonal to one of the coordinate axes I tend to use an equivalent fixed value BC and only use t…

SimScale CAE Forum

FEA constraints :(

Using SimScale Solid Mechanics / FEA

DaleKramer February 7, 2019, 5:09pm 5

@rszoeke

I finally got a sim run to finish (‘Run 5’) without errors, but something is still not quite realistic in the constraints:

Any ideas?