# 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

 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

 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

 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())

 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

 hexa8 FreeCAD nodes hexa20 FreeCAD nodes hexa8 (C3D8) CalculiX nodes hexa20 (C3D20) CalculiX nodes FreeCAD --> CalculiX, Nodes 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 FreeCAD --> CalculiX, Code (0)(3)(2)(1)(4)(7)(6)(5) (0)(3)(2)(1)(4)(7)(6)(5)(11)(10)(9)(8)(15)(14)(13)(12)(16)(19)(18)(17)

#### Pentahedron element

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

 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)