Reference problem
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Geometry and meshes
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We consider a horizontal and circular cable contained in concrete. The mesh of the concrete part is the same for each model. But the cable mesh is changing.

**Modeling A:** the cable was constructed from the equation of the circle; it has 100 meshes of type SEG2. It is very regular, spline interpolation is correct. This modeling serves as a reference for the other two.

**Modeling B:** the cable (like concrete) comes from a mesh of the Vercors enclosure. Cable discretization is identical to modeling A (100 meshes).

**Modeling C:** the cable (like concrete) comes from a finer mesh of the Vercors enclosure, it has 302 meshes.