FEM Mesh CalculiX

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FEM Element Types

Segment element


Triangle element

Triangle element from FreeCAD to CalculiX -- node assignment
tria3 FreeCAD nodes tria6 FreeCAD nodes
Tria3--fc.png Tria6--fc.png
tria3 FreeCAD nodes element rotated tria6 FreeCAD nodes element rotated
250px 250px
tria3 (S3) CalculiX nodes tria6 (S6) CalculiX nodes
Tria3--ccx.png Tria6--ccx.png
FreeCAD
N1, N2, N3 N1, N2, N3, N4, N5, N6
CalculiX
N1, N3, N2 N1, N3, N2, N6, N5, N4



Quadratic element

Quadratic element from FreeCAD to CalculiX -- node assignment
quad4 FreeCAD nodes tria6 FreeCAD nodes
Quad4--fc.png Quad8--fc.png
quad4 FreeCAD nodes element rotated quad8 FreeCAD nodes element rotated
Quad4--fc rotated.png Quad8--fc rotated.png
quad4 (S4) CalculiX nodes quad8 (S8) CalculiX nodes
Quad4--ccx.png Quad8--ccx.png
FreeCAD
N1, N2, N3, N4 N1, N2, N3, N4, N5, N6, N7, N8
CalculiX
N1, N4, N3, N2 N1, N4, N3, N2, N8, N7, N6, N5



Tetrahedron element

Tetrahedron element from FreeCAD to CalculiX -- node assignment
tetra4 FreeCAD nodes tetra10 FreeCAD nodes
Tetra4--fc.png Tetra10--fc.png
tetra4 FreeCAD nodes element rotated tetra10 FreeCAD nodes element rotated
Tetra4--fc rotated.png Tetra10--fc rotated.png
tetra4 (C3D4) CalculiX nodes tetra10 (C3D10) CalculiX nodes
Tetra4--ccx.png Tetra10--ccx.png
FreeCAD
N1, N2, N3, N4 N1, N2, N3, N4, N5, N6, N7, N8, N9, N10
CalculiX
N1, N3, N2, N4 N1, N3, N2, N4, N7, N6, N5, N8, N10, N9


Hexahedron element

Hexahedron element from FreeCAD to CalculiX -- node assignment
hex8 FreeCAD nodes hex20 FreeCAD nodes
Hexa8--fc.png Hexa20--fc.png
hex8 FreeCAD nodes element rotated hex20 FreeCAD nodes element rotated
Hexa8--fc rotated.png Hexa20--fc rotated.png
hex8 (C3D8) CalculiX nodes hex20 (C3D20) CalculiX nodes
Hexa8--ccx.png Hexa20--ccx.png
FreeCAD
N1, N2, N3, N4, N5, N6, N7, N8 N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15, N16, N17, N18, N19, N20
CalculiX
N1, N4, N3, N2, N5, N8, N7, N6 N1, N4, N3, N2, N5, N8, N7, N6, N12, N11, N10, N9 , N16, N15, N14, N13, N17, N20, N19, N18


Pentahedron element

Pentahedron element from FreeCAD to CalculiX -- node assignment
penta6 FreeCAD nodes penta15 FreeCAD nodes
Penta6--fc.png Penta15--fc.png
penta6 FreeCAD nodes element rotated penta15 FreeCAD nodes element rotated
Penta6--fc rotated.png Penta15--fc rotated.png
penta6 (C3D6) CalculiX nodes penta15 (C3D15) CalculiX nodes
Penta6--ccx.png Penta15--ccx.png
FreeCAD
N1, N2, N3, N4, N5, N6 N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15
CalculiX
N1, N3, N2, N4, N6, N5 N1, N3, N2, N4, N6, N5, N9, N8, N7, N12, N11, N10, N13, N15, N14