FEM ConstraintTie

    From FreeCAD Documentation

    FEM ConstraintTie.svg FEM ConstraintTie

    Menu location
    Model → Mechanical Constraints → Constraint tie
    Default shortcut
    Introduced in version
    See also
    FEM Constraint pressure


    Defines a tie constraint that connects the two selected surfaces in such a way that (as opposed to how contact works) they can't separate or slide on each other throughout the analysis. Thus, the surfaces remain permanently bonded all the time.


    1. There are several ways to invoke the command:
      • Press the FEM ConstraintTie.svg FEM ConstraintTie button.
      • Select the Model → Mechanical Constraints → FEM ConstraintTie.svg Constraint tie option from the menu.
    2. Press the Add button in the task panel and then click on the face you want to add to tie constraint definition. Exactly two faces have to be added, one after the other.
    3. Optionally, define Tolerance - tie constraint will be applied only to nodes separated from the opposite surface by the distance not larger than the one specified here.