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Monolateral constraint

Dear all,


how can I set a monolateral constraint in a model? for example an object supported by the ground is constrainted only in one direction. I would set this constraint for nodes.


Best regards



Re: Monolateral constraint

Valued Contributor
Valued Contributor

Hi Stefano,


Can you elaborate a bit more about what you are trying to do. If you just want to contrain nodes in one direction you can simply set up a nodal constraint in the desired direction.


If you are looking at a more complex model you can try using gap elements.





Re: Monolateral constraint

Valued Contributor
Valued Contributor

There is no such option in any standard linear static FE theory. The direction assymetry breaks the linearity.

In Femap you can still use linear statics by adding gap elements. Or you could move to a non-linear analysis and use either gap elements or contact regions (not sure right now, contact regions might work with linear statics also?).