*PRE-TENSION SECTION on tetrahedral mesh

1

It seems to be impossible to define a valid surface on a general tet mesh because of this requirement:

“the surface does not contain edges or vertices of elements which do not
have a face in common with the surface”

Is there any way around this or just don’t use *PRE-TENSION SECTION on tet meshes that aren’t carefully hand-made to satisfy it?

2

In case of tets, there is a workaround of extruding (with very little thikness) the faces to get wedges, and then use the face of this wedges in place of the tets.

3

Great idea Sergio. Thin layers to the rescue again!