FEM ConstraintDisplacement

From FreeCAD Documentation
Revision as of 08:15, 29 February 2020 by Kunda1 (talk | contribs) (Linted templates + added link)
Jump to navigation Jump to search

FEM ConstraintDisplacement.svg FEM ConstraintDisplacement

Menu location
Model → Mechanical Constraints → Constraint displacement
Default shortcut
Introduced in version
See also
FEM tutorial


Creates a FEM constraint for a prescribed displacement of a selected object for a specified degree of freedom.


  1. Click on FEM ConstraintDisplacement.png or choose ModelMechanical ConstraintsFEM ConstraintDisplacement.png Constraint displacement from the top menu.
  2. Select in the 3D view the object the constraint should be applied to, which can be
    1. vertices (corners)
    2. edges
    3. faces
  3. Choose a degree of freedom to fix or prescribe a displacement to.



  1. The constraint uses the *BOUNDARY card in CalculiX. Fixing a degree of freedom is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node164.html and prescribing a displacement for a degree of freedom is explained at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node165.html