FEM Mesh CalculiX

FEM Element Types CalculiX

For detailed information about FreeCAD FEM Element Types checkt the FEM_Mesh and FEM_Element_Types Wiki pages.

Segment element

Segment element from FreeCAD to CalculiX -- node assignment

seg2 FreeCAD nodes	seg3 FreeCAD nodes
seg2 (B31) CalculiX nodes	seg3 (B32) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N1, N2	N1, N3, N2

Triangle element

Triangle element from FreeCAD to CalculiX -- node assignment

tria3 FreeCAD nodes	tria6 FreeCAD nodes
tria3 (S3) CalculiX nodes	tria6 (S6) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N1, N2, N3	N1, N2, N3, N4, N5, N6

Quadratic element

Quadratic element from FreeCAD to CalculiX -- node assignment

quad4 FreeCAD nodes	quad8 FreeCAD nodes
quad4 (S4) CalculiX nodes	quad8 (S8) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N1, N2, N3, N4	N1, N2, N3, N4, N5, N6, N7, N8

Tetrahedron element

The following node order is not implemented ! TODO: verify node order (do not forget getccxVolumesByFace()).

Tetrahedron element from FreeCAD to CalculiX -- node assignment

tetra4 FreeCAD nodes	tetra10 FreeCAD nodes
tetra4 (C3D4) CalculiX nodes	tetra10 (C3D10) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N2, N3, N4, N1	N2, N3, N4, N1, N6, N10, N9, N5, N7, N8

Hexahedron element

Hexahedron element from FreeCAD to CalculiX -- node assignment

hexa8 FreeCAD nodes	hexa20 FreeCAD nodes
hexa8 (C3D8) CalculiX nodes	hexa20 (C3D20) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N6, N7, N8, N5, N2, N3, N4, N1	N6, N7, N8, N5, N2, N3, N4, N1 , N14, N15, N16, N13, N10, N11, N12, N9, N18, N19, N20, N17

Pentahedron element

Pentahedron element from FreeCAD to CalculiX -- node assignment

penta6 FreeCAD nodes	penta15 FreeCAD nodes
penta6 (C3D6) CalculiX nodes	penta15 (C3D15) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N5, N6, N4, N2, N3, N1	N5, N6, N4, N2, N3, N1, N11, N12, N10, N8, N9, N7, N14, N15, N13