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Applying a robin boundary in hyperlelasticity

+2 votes

Is this correct way to apply robin boundary condition in a hypereleasticity problem in FEniCS?

Robin boundary is

P.n = ku

In Ufl form, I have 

k = some_number
Pi = psi*dx - k*inner(u, u)*ds(2)
asked Oct 13, 2014 by gennadiy FEniCS Novice (590 points)
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