Dear Phuoc,
There is no specific function for that, but you have access to the
Hessian ('Hess_u' for the variable u), so you have to give the
expression of the divergence of the stress tensor with respect to the
Hessian of the variable.
Additionally, for the jumps on normal derivatives on element interfaces
see
http://getfem.org/userdoc/gasm_high.html#evaluating-discontinuities-across-inter-element-edges-faces
Best regards,
Yves
Le 16/01/2018 à 06:08, Huu Phuoc BUI a écrit :
Dear getfem users,
I'd like to compute the divergence of stress tensor of a linear
elasticity problem which is necessary in an a posteriori error estimate.
Do you have any idea how to compute it using generic assembly of GetFEM?
Thank you
in advance for your support.
Best regards,
Phuoc
--
Yves Renard ([email protected]) tel : (33) 04.72.43.87.08
Pole de Mathematiques, INSA-Lyon fax : (33) 04.72.43.85.29
20, rue Albert Einstein
69621 Villeurbanne Cedex, FRANCE
http://math.univ-lyon1.fr/~renard
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