FEM Mesh CalculiX

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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.png Seg3--fc.png
seg2 (B31) CalculiX nodes seg3 (B32) CalculiX nodes
Seg2.png Seg3--ccx.png
FreeCAD --> CalculiX, Nodes
N1, N2 N1, N3, N2
FreeCAD --> CalculiX, Code
(0)(1) (0)(2)(1)



Triangle element

Triangle element from FreeCAD to CalculiX -- node assignment
tria3 FreeCAD nodes tria6 FreeCAD nodes
Tria3--fc.png Tria6--fc.png
tria3 (S3) CalculiX nodes tria6 (S6) CalculiX nodes
Tria3--ccx.png Tria6--ccx.png
FreeCAD --> CalculiX, Nodes
N1, N2, N3 N1, N2, N3, N4, N5, N6
FreeCAD --> CalculiX, Code
(0)(1)(2) (0)(1)(2)(3)(4)(5)


Quadratic element

Quadratic element from FreeCAD to CalculiX -- node assignment
quad4 FreeCAD nodes quad8 FreeCAD nodes
Quad4--fc.png Quad8--fc.png
quad4 (S4) CalculiX nodes quad8 (S8) CalculiX nodes
Quad4--ccx.png Quad8--ccx.png
FreeCAD --> CalculiX, Nodes
N1, N2, N3, N4 N1, N2, N3, N4, N5, N6, N7, N8
FreeCAD --> CalculiX, Code
(0)(1)(2)(3) (0)(1)(2)(3)(4)(5)(6)(7)


Tetrahedron element

this node order is not implemented TODO: verify node order and implement (do not forget getccxVolumesByFace())

Tetrahedron element from FreeCAD to CalculiX -- node assignment
tetra4 FreeCAD nodes tetra10 FreeCAD nodes
Tetra4--fc.png Tetra10--fc.png
tetra4 (C3D4) CalculiX nodes tetra10 (C3D10) CalculiX nodes
Tetra4--ccx.png Tetra10--ccx.png
FreeCAD --> CalculiX, Nodes
N2, N3, N4, N1 N2, N3, N4, N1, N6, N10, N9, N5, N7, N8
FreeCAD --> CalculiX, Code
(1)(2)(3)(0) (1)(2)(3)(0)(5)(9)(8)(4)(6)(7)


Hexahedron element

this node order is not implemented TODO: verify node order and implement

Hexahedron element from FreeCAD to CalculiX -- node assignment
hexa8 FreeCAD nodes hexa20 FreeCAD nodes
Hexa8--fc.png Hexa20--fc.png
hexa8 (C3D8) CalculiX nodes hexa20 (C3D20) CalculiX nodes
Hexa8--ccx.png Hexa20--ccx.png
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
FreeCAD --> CalculiX, Code
(5)(6)(7)(4)(1)(2)(3)(0) (5)(6)(7)(4)(1)(2)(3)(0)(13)(14)(15)(12)(9)(10)(11)(8)(17)(18)(19)(16)


Pentahedron element

this node order is not implemented TODO: verify node order and implement

Pentahedron element from FreeCAD to CalculiX -- node assignment
penta6 FreeCAD nodes penta15 FreeCAD nodes
Penta6--fc.png Penta15--fc.png
penta6 (C3D6) CalculiX nodes penta15 (C3D15) CalculiX nodes
Penta6--ccx.png Penta15--ccx.png
FreeCAD --> CalculiX, Nodes
N5, N6, N4, N2, N3, N1 N5, N6, N4, N2, N3, N1, N11, N12, N10, N8, N9, N7, N14, N15, N13
FreeCAD --> CalculiX, Code
(4)(5)(3)(1)(2)(0) (4)(5)(3)(1)(2)(0)(10)(11)(9)(7)(8)(6)(13)(14)(12)