FEM ConstraintContact: Difference between revisions

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==Description== <!--T:2-->
==Description== <!--T:2-->

Creates a FEM constraint for contact between 2 surfaces.
Creates a FEM constraint for contact between 2 surfaces.


==Use== <!--T:3-->
==How to use== <!--T:3-->

#Click on [[Image:FEM ConstraintContact.png|32px]] or choose {{KEY|Model}} → '''Mechanical Constraints''' → {{KEY|[[Image:FEM ConstraintContact.png|32px]] Constraint contact}} from the top menu.
#Click on [[Image:FEM ConstraintContact.png|32px]] or choose {{KEY|Model}} → '''Mechanical Constraints''' → {{KEY|[[Image:FEM ConstraintContact.png|32px]] Constraint contact}} from the top menu.
#Select the master face.
#Select the master face.
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==Limitations== <!--T:4-->
==Limitations== <!--T:4-->

#The contact constraint can only be applied to two faces.
#The contact constraint can only be applied to two faces.


==Notes== <!--T:5-->
==Notes== <!--T:5-->

#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.
#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.

Revision as of 09:10, 4 March 2018

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.

Notes

  1. 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.
  2. The slave face is the face which penetrates into the master face, and therefore experiences more deformation.
  3. 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