There are currently three different Displacements constraints you can use.
Clamped constraint, which block every degree of freedom
General constraint, where you can define which translational movement you want to block
Axial constraint, where you can choose an axis for which the only the axial movement stays free. If you choose a face, the translational movement in the direction of normal vector stays free
Modelling of a Screw Fixation:
Bilder vom Modellaufbau (Apex?)
A screw fixation can be modelled by using a nondesign around the screw which is fxed in all directions.
To simulate the reality it is also possible to load in an extra volume that’s representing the screw. However the screw will not be inlcuded in the design space because it is just an help for the simulation of the reality and the screw should not be part of the finished optimization result. The screw will be used as a fixation and is considered fixed in all directions. Additionally, there should be a nondesign space around the screw, which will be included in the design space as well, but which will not be used as a fixation in the optimization model. This way the nondesign space does not experience an artificial stiffening, which represents the reality much more accurately.