Difference between revisions of "FEM Mesh CalculiX"

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For detailed information on FreeCAD FEM elements see [[FEM Mesh|FEM Mes]] and [[FEM Element Types|FEM Element Types]].
 
For detailed information on FreeCAD FEM elements see [[FEM Mesh|FEM Mes]] and [[FEM Element Types|FEM Element Types]].
  
==== Segment element ==== <!--T:2-->
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=== Segment element === <!--T:2-->
  
 
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|| N1, N2 || N1, N3, N2
 
|| N1, N2 || N1, N3, N2
 
|}
 
|}
<p>  <br />  </p>
 
  
==== Triangle element ==== <!--T:3-->
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=== Triangle element === <!--T:3-->
  
 
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|| N1, N2, N3  || N1, N2, N3, N4, N5, N6
 
|| N1, N2, N3  || N1, N2, N3, N4, N5, N6
 
|}
 
|}
<p>  <br />  </p>
 
  
==== Quadratic element ==== <!--T:4-->  
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=== Quadratic element === <!--T:4-->  
  
 
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|| N1, N2, N3, N4 || N1, N2, N3, N4, N5, N6, N7, N8
 
|| N1, N2, N3, N4 || N1, N2, N3, N4, N5, N6, N7, N8
 
|}
 
|}
<p>  <br />  </p>
 
  
==== Tetrahedron element ==== <!--T:6-->  
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=== Tetrahedron element === <!--T:6-->  
  
 
<!--T:7-->
 
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|| N2, N3, N4, N1 || N2, N3, N4, N1, N6, N10, N9, N5, N7, N8
 
|| N2, N3, N4, N1 || N2, N3, N4, N1, N6, N10, N9, N5, N7, N8
 
|}
 
|}
<p>  <br />  </p>
 
  
==== Hexahedron element ==== <!--T:9-->
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=== Hexahedron element === <!--T:9-->
  
 
<!--T:14-->
 
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||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
 
||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
 
|}
 
|}
<p>  <br />  </p>
 
  
==== Pentahedron element ==== <!--T:10-->
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=== Pentahedron element === <!--T:10-->
  
 
<!--T:15-->
 
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|| N5, N6, N4, N2, N3, N1 ||  N5, N6, N4, N2, N3, N1, N11, N12, N10, N8, N9, N7, N14, N15, N13
 
|| N5, N6, N4, N2, N3, N1 ||  N5, N6, N4, N2, N3, N1, N11, N12, N10, N8, N9, N7, N14, N15, N13
 
|}
 
|}
<p>  <br />  </p>
 
 
  
 
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<!--T:11-->
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[[Category:Developer]]
 
[[Category:Developer]]
 
[[Category:Poweruser_Documentation]]
 
[[Category:Poweruser_Documentation]]
 
  
 
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Revision as of 23:21, 6 April 2019

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FEM element types in CalculiX

For detailed information on FreeCAD FEM elements see FEM Mes and FEM Element Types.

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

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

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

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--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

Hexahedron element

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

Pentahedron element

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