Frictionless constraint
Frictionless constraints are applied to prevent surfaces from moving or deforming in the normal direction. You can apply frictionless constraints to both flat and cylindrical surfaces in a part.
When applied to flat surfaces, frictionless constraints mimic the behavior of symmetry boundary conditions. However, unlike symmetry constraints, frictionless constraints do not require the setup of a local coordinate system for surfaces that are not aligned with the global coordinate system. As a result, frictionless constraints provide a quicker solution for establishing symmetry on angled and flat surfaces—especially for larger, more complex models.
Shrink Fit contact types
- Shrink Fit / Sliding is used for a surface contact with initial interference between the contacting parts, where sliding is permitted.
- Shrink Fit / No Sliding behaves like a Separation/No Sliding contact, but with initial interference between the contacting parts. Use this option when the intensity of fit and friction are great enough to prevent relative motion (sliding) between the contacting parts.
For more information, see the "Contact Data" section of the Manual Surface Contacts topic.
Meshing improvements
The meshing process has been made more efficient in 2019.2, especially for shell and solid meshes.