FEM ConstraintContact: Difference between revisions
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==Notes== <!--T:5--> |
==Notes== <!--T:5--> |
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=== CalculiX === <!--T:9--> |
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=== CalculiX === |
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* The contact stiffness should be 10 times the young's modulus of the material for hard contact. The higher the value for contact stiffness, the harder the contact between surfaces. |
* The contact stiffness should be 10 times the young's modulus of the material for hard contact. The higher the value for contact stiffness, the harder the contact between surfaces. |
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* The slave face is the face which penetrates into the master face, and therefore experiences more deformation. |
* The slave face is the face which penetrates into the master face, and therefore experiences more deformation. |
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Revision as of 19:02, 18 September 2018
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| 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
- Click on
or choose Model → Mechanical Constraints → Constraint contact from the top menu. - Select the master face.
- Select the slave face.
- Enter a contact stiffness.
- Enter a friction coefficient.
Limitations
- The contact constraint can only be applied to two faces.
Notes
CalculiX
- The contact stiffness should be 10 times the young's modulus of the material for hard contact. The higher the value for contact stiffness, the harder the contact between surfaces.
- The slave face is the face which penetrates into the master face, and therefore experiences more deformation.
- The *CONTACT PAIR card is used for modeling contact in CalculiX. The constraint uses Face-to-Face penalty contact and the contact formulation is explained in detail at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node112.html
- Overview for different contact types: https://forum.freecadweb.org/viewtopic.php?f=18&t=15699&start=90#p188736
- Further interesting informations: