Dear Tetsuo,
It seems that on some distorded quadrilateral elements, the inversion of
the geometric transformation converges well, but outside the element
(you can trace the inversion in the function
geotrans_inv_convex::invert_nonlin in bgeot_geotrans_inv.cc to see it)
which means that there are possibly several solutions to the inversion.
For the moment, I do not see how to solve that. Appart to shift a bit
the tranformation such as
md.add_interpolate_transformation_from_expression("Proj1", mesh1, mesh2,
"[X(1);-X(2)-1e-2]")
Best regards,
Yves
On 13/02/2021 11:04, Tetsuo Koyama wrote:
Dear GetFEM community
I want to solve the contact problem between two cylinders. The mesh is
like the following.
This is a 1/4 model with symmetry conditions on the left and having
Dirichlet condition [0.-0.1] on the top and [0.0, 0.0] on the bottom.
I used this tutorial `Example of wheel in contact (Assembly between
two meshes, transformations, use of fixed size variables)` as a guide
to create a program like the attached script "hertz.py", but an error
occurred:
RuntimeError: (Getfem::InterfaceError) -- Error in
getfem_generic_assembly_compile_and_exec.cc, line 1433 virtual int
getfem::ga_instruction_interpolate_base::exec():
No valid element for the transformation. Probably transformation failed
I think my projection is correct.
md.add_interpolate_transformation_from_expression("Proj1", mesh1,
mesh2, "[X(1);-X(2)]")
Do you have any idea how to solve this problem?
Thanks a lot for reading.
Best regards Tetsuo
mesh.png
--
Yves Renard (yves.ren...@insa-lyon.fr) tel : (33) 04.72.43.87.08
INSA-Lyon
20, rue Albert Einstein
69621 Villeurbanne Cedex, FRANCE
http://math.univ-lyon1.fr/~renard
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