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[Chong Luo <luo.chong@xxxxxxxxx>]

Hi,

I implemented 3D incompressible nonlinear elasticity (for neo-Hookean materials) using FEniCS. 
However, the iteration didn't converge.
The finite element spaces I chose are Lagrange element of degree 1 in tetrahedron.

I saw in P.Le Tallec's book (Handbook of Numerical Analysis, Vol III) that some 
finite element spaces are stable (like Ruas finite element), while others are not.
But it seems that Ruas finite element is not available in FEniCS.

My question is, what are the possible choices of finite element spaces in FEniCS
that would make 3D incompressible nonlinear elasticity stable? 

Thank you!

Best,
Chong Luo



      




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