FEM Mesh CalculiX

From FreeCAD Documentation

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
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 (S3) CalculiX nodes tria6 (S6) CalculiX nodes
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 (S4) CalculiX nodes quad8 (S8) CalculiX nodes
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 (C3D4) CalculiX nodes tetra10 (C3D10) CalculiX nodes
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 (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
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 (C3D6) CalculiX nodes penta15 (C3D15) CalculiX nodes
FreeCAD --> CalculiX, Nodes
N1, N3, N2, N4, N6, N5 N1, N3, N2, N4, N6, N5, N9, N8, N7, N12, N11, N10, N13, N15, N14
FreeCAD --> CalculiX, Code
(0)(2)(1)(3)(5)(4) (0)(2)(1)(3)(5)(4)(8)(7)(6)(11)(10)(9)(12)(14)(13)