Re: [Libmesh-users] Adding a force to a boundary through an additional node

[Vikram G. <vik...@gm...>]

You might need a Lagrange multiplier formulation that sets a state variable
in an entire subdomain or boundary to a single unknown scalar. Example 3 in
systems of equations might help, it shows how SCALAR variables can be used.
You could incorporate the scalar variable into the weak form via a penalty
method.

Vikram Garg

vikramvgarg.github.io/


On Sun, Jun 27, 2021 at 6:10 PM edgar <edg...@cr...> wrote:

> On 2021-06-27 23:01, Renato Poli wrote:
> > I'd like to add a force to a whole boundary. The constraint is that the
> > whole boundary must have the same displacement.
> > ---8<--- snip
>
> For the sake of disambiguation: do you want to impose displacement or
> force? The displacement of a boundary is not only dependent on the force
> it receives.
>
> I am guessing that the developers (regular user here! hi!) would like to
> know.
>
>
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