FEM ConstraintContact: Difference between revisions

From FreeCAD Documentation
(Marked this version for translation)
No edit summary
(5 intermediate revisions by 3 users not shown)
Line 2: Line 2:
<translate>
<translate>
<!--T:11-->
<!--T:11-->
{{docnav|[[FEM_ConstraintPlaneRotation|Constraint plane rotation]]|[[FEM_ConstraintTransform|Constraint transform]]|[[FEM_Module|FEM_Module]]}}
{{Docnav|[[FEM_ConstraintPlaneRotation|Constraint plane rotation]]|[[FEM_ConstraintTransform|Constraint transform]]|[[FEM_Module|FEM]]|IconL=FEM_ConstraintPlaneRotation.png|IconC=Workbench_FEM.svg|IconR=FEM_ConstraintTransform.png}}


<!--T:1-->
<!--T:1-->
Line 25: Line 25:
<!--T:8-->
<!--T:8-->
#The contact constraint can only be applied to two faces.
#The contact constraint can only be applied to two faces.
#development for multiple contact at once: https://forum.freecadweb.org/viewtopic.php?f=18&t=15699&start=130#p303275


==Notes== <!--T:5-->
==Notes== <!--T:5-->
=== Some tipps how to model? ===
* from https://forum.freecadweb.org/viewtopic.php?f=18&p=340874#p340494
* Better use linear elements otherwise calculations are very time consuming
* master/slave assignment:
** The larger of the two surfaces should act as the master surface.
** If the surfaces are of comparable size, the surface on the stiffer body should act as the master surface.
** If the surfaces are of comparable size and stiffness, the surface with the coarser mesh should act as the master surface.



=== CalculiX === <!--T:9-->
=== CalculiX === <!--T:9-->
Line 42: Line 51:
* A very detailed CalculiX contact example:
* A very detailed CalculiX contact example:
** http://dip28p.web.fc2.com/calculix/netgen2calculix/index.html
** http://dip28p.web.fc2.com/calculix/netgen2calculix/index.html

<!--T:15-->
* A very cool example too. In German supforum.
** https://forum.freecadweb.org/viewtopic.php?f=13&t=39663&start=10#p337254


<!--T:12-->
<!--T:12-->
{{docnav|[[FEM_ConstraintPlaneRotation|Constraint plane rotation]]|[[FEM_ConstraintTransform|Constraint transform]]|[[FEM_Module|FEM_Module]]}}
{{Docnav|[[FEM_ConstraintPlaneRotation|Constraint plane rotation]]|[[FEM_ConstraintTransform|Constraint transform]]|[[FEM_Module|FEM]]|IconL=FEM_ConstraintPlaneRotation.png|IconC=Workbench_FEM.svg|IconR=FEM_ConstraintTransform.png}}

<!--T:13-->
{{FEM Tools navi}}
{{FEM Tools navi}}

<!--T:14-->
{{Userdocnavi}}
{{Userdocnavi}}
</translate>
</translate>

Revision as of 08:13, 14 October 2019

FEM ConstraintContact

Menu location
Model → Mechanical Constraints → Constraint contact
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

Creates a FEM constraint for contact between 2 surfaces.

How to use

  1. Click on or choose ModelMechanical Constraints Constraint contact from the top menu.
  2. Select the master face.
  3. Select the slave face.
  4. Enter a contact stiffness.
  5. Enter a friction coefficient.

Limitations

  1. The contact constraint can only be applied to two faces.
  2. development for multiple contact at once: https://forum.freecadweb.org/viewtopic.php?f=18&t=15699&start=130#p303275

Notes

Some tipps how to model?

  • from https://forum.freecadweb.org/viewtopic.php?f=18&p=340874#p340494
  • Better use linear elements otherwise calculations are very time consuming
  • master/slave assignment:
    • The larger of the two surfaces should act as the master surface.
    • If the surfaces are of comparable size, the surface on the stiffer body should act as the master surface.
    • If the surfaces are of comparable size and stiffness, the surface with the coarser mesh should act as the master surface.


CalculiX