[Getfem-users] Dirichlet BC in vectorial problems

[Andriy Andreykiv]

Dear Yves and Jullien,

  Would you please advice me on the following.

        If I have a vectorial problem like liniear elasticity, how can I 
prescribe 
only one component of the displacement vector on a given boundary?
I don't see how I can do this with Dirichlet Brick or 
assembling_Dirichlet_condition, as they both with prescribe the value of all 
the components of the displacement.

        Another question if I may. Is there a possibility to prescribe a 
Dirichlet 
boundary condition on a node, not a face of the element. Somtimes it is 
necessary to prevent rigid body modes in mechanical problems, while 
constraining a face will change the physics of the problem.

Thanks in advance,
                                Andriy


__________________________________________
Andriy Andreykiv
Delft University of Technology
Faculty of Mechanical Engineering 
Fundamentals of Microsystems
Mekelweg 2
2628 CD  Delft
The Netherlands

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