Boundary term involving curvature

[woerthi147]

Hi all,
I have the following set of equations (linear elasticity) which I want to solve in FEniCS.

The problem is that the boundary term is dependent on the local curvature of the boundary (kappa). Any ideas how to handle this kind of boundary condition?

Best
Dennis

[woerthi147]

Dear FEniCs community. I am still not able to find a solution to the above stated boundary condition. I cannot believe that it’s impossible to implement it. Is there anybody who has done similar things and can help me here?

Best
Dennis

[dokken]

A search on the forum reveals for instance: How to compute curvature of a boundary - #2 by dokken