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 <edgar...@cryptolab.net> 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. > > > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmesh-users > _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
