FEM Mesh CalculiX: Difference between revisions

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<!--T:1-->
== FEM Element Types CalculiX ==
== FEM element types in CalculiX ==
For detailed information about FreeCAD FEM Element Types checkt the [[FEM_Mesh]] and [[FEM_Element_Types]] Wiki pages.
For detailed information on FreeCAD FEM elements see [[FEM Mesh|FEM Mesh]] and [[FEM Element Types|FEM Element Types]]. For CalculiX specific questions you may try the [https://calculix.discourse.group Discourse group] or the [https://discord.gg/yyuQQg5 Discord channel].

=== Segment element === <!--T:2-->


<!--T:12-->
==== Segment element ====
{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Segment element from FreeCAD to CalculiX -- node assignment'''
|+ '''Segment element from FreeCAD to CalculiX -- node assignment'''
|-
|-
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| [[File:Seg2.png|250px]] || [[File:Seg3--ccx.png|250px]]
| [[File:Seg2.png|250px]] || [[File:Seg3--ccx.png|250px]]
|-
|-
||FreeCAD --> CalculiX, Nodes ||
||FreeCAD CalculiX, Nodes ||
|-
|-
|| N1, N2 || N1, N3, N2
|| N1, N2 || N1, N3, N2
|}
|}
<p> <br /> </p>


==== Triangle element ====
=== Triangle element === <!--T:3-->

{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
<!--T:13-->
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Triangle element from FreeCAD to CalculiX -- node assignment'''
|+ '''Triangle element from FreeCAD to CalculiX -- node assignment'''
|-
|-
Line 34: Line 40:
| [[File:Tria3--ccx.png|250px]] || [[File:Tria6--ccx.png|250px]]
| [[File:Tria3--ccx.png|250px]] || [[File:Tria6--ccx.png|250px]]
|-
|-
||FreeCAD --> CalculiX, Nodes ||
||FreeCAD CalculiX, Nodes ||
|-
|-
|| N1, N2, N3 || N1, N2, N3, N4, N5, N6
|| N1, N2, N3 || N1, N2, N3, N4, N5, N6
|}
|}
<p> <br /> </p>


==== Quadratic element ====
=== Quadrangle element === <!--T:4-->


<!--T:5-->
{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Quadratic element from FreeCAD to CalculiX -- node assignment'''
|+ '''Quadrangle element from FreeCAD to CalculiX -- node assignment'''
|-
|-
| quad4 FreeCAD nodes || quad8 FreeCAD nodes
| quad4 FreeCAD nodes || quad8 FreeCAD nodes
Line 53: Line 59:
| [[File:Quad4--ccx.png|250px]] || [[File:Quad8--ccx.png|250px]]
| [[File:Quad4--ccx.png|250px]] || [[File:Quad8--ccx.png|250px]]
|-
|-
||FreeCAD --> CalculiX, Nodes ||
||FreeCAD CalculiX, Nodes ||
|-
|-
|| 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 ====
=== Tetrahedron element === <!--T:6-->


<!--T:7-->
The following node order is not implemented ! TODO: verify node order (do not forget getccxVolumesByFace()).
The following node order is not implemented ! TODO: verify node order (do not forget getccxVolumesByFace()).


<!--T:8-->
{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Tetrahedron element from FreeCAD to CalculiX -- node assignment'''
|+ '''Tetrahedron element from FreeCAD to CalculiX -- node assignment'''
|-
|-
Line 74: Line 81:
| [[File:Tetra4--ccx.png|250px]] || [[File:Tetra10--ccx.png|250px]]
| [[File:Tetra4--ccx.png|250px]] || [[File:Tetra10--ccx.png|250px]]
|-
|-
||FreeCAD --> CalculiX, Nodes ||
||FreeCAD CalculiX, Nodes ||
|-
|-
|| 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 ====
=== Hexahedron element === <!--T:9-->

{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
<!--T:14-->
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Hexahedron element from FreeCAD to CalculiX -- node assignment'''
|+ '''Hexahedron element from FreeCAD to CalculiX -- node assignment'''
|-
|-
Line 92: Line 100:
| [[File:Hexa8--ccx.png|250px]] || [[File:Hexa20--ccx.png|250px]]
| [[File:Hexa8--ccx.png|250px]] || [[File:Hexa20--ccx.png|250px]]
|-
|-
||FreeCAD --> 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
||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 ====
=== Pentahedron element === <!--T:10-->

{| class="wikitable" style="color:green; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
<!--T:15-->
{| class="wikitable" style="color:black; background-color:#eeeeef;" cellpadding="5" cellspacing="0" border="1"
|+ '''Pentahedron element from FreeCAD to CalculiX -- node assignment'''
|+ '''Pentahedron element from FreeCAD to CalculiX -- node assignment'''
|-
|-
Line 110: Line 119:
| [[File:Penta6--ccx.png|250px]] || [[File:Penta15--ccx.png|250px]]
| [[File:Penta6--ccx.png|250px]] || [[File:Penta15--ccx.png|250px]]
|-
|-
||FreeCAD --> CalculiX, Nodes ||
||FreeCAD CalculiX, Nodes ||
|-
|-
|| 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>


== Related == <!--T:16-->


<!--T:17-->
[[Category:Developer]]
* [[FEM_CalculiX|FEM CalculiX]] page
[[Category:Poweruser_Documentation]]
* [[FEM_Preferences#CalculiX|CalculiX preferences]] dialog menu in the FEM Workbench preferences menu




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Latest revision as of 09:18, 30 November 2023

Other languages:

FEM element types in CalculiX

For detailed information on FreeCAD FEM elements see FEM Mesh and FEM Element Types. For CalculiX specific questions you may try the Discourse group or the Discord channel.

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

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

Quadrangle element

Quadrangle 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

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 (C3D4) CalculiX nodes tetra10 (C3D10) CalculiX nodes
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 (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

Pentahedron element

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
N5, N6, N4, N2, N3, N1 N5, N6, N4, N2, N3, N1, N11, N12, N10, N8, N9, N7, N14, N15, N13

Related