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Contact and glue conditions > Nastran and Simcenter 3D Multiphysics contact and glue

Internal edges for source and target regions

When using the Edge-to-Edge Contact command, if you manually create regions where the source edge or target edge is an internal edge, you can select the polygon face that the software associates with the source or target region.

For example, consider the rectangular panel in the following figure:

Lower polygon face (1) Upper polygon face (2)

The underlying polygon geometry for the panel is composed of two polygon faces that share a common edge. The common edge was created using the Split Face command to divide the original rectangular polygon face into two polygon faces.

In the example, if you do not associate the polygon faces with the source and target edges, the elements that the software writes to the solver input file for both the source and target regions include the elements on both sides of the common edge. If you associate the lower polygon face with the source edge definition, the software writes only the elements below the common edge to the solver input file for the source region. Similarly, if you associate the upper polygon face with the target edge definition, the software writes only the elements above the common edge to the solver input file for the target region. Thus, the elements in the source and target regions are distinct from one another.

To associate a source or target edge with a polygon face, in the Region dialog box, use the Select Associated Faces command to select the polygon face.

Note:

The software displays the Select Associated Faces command after you select an internal edge as the source or target edge.

The symbolic display of the Edge-to-Edge Contact simulation object indicates whether the polygon faces are associated with the source and target regions as follows:

Symbolic display when the lower polygon face is associated with the source region and the upper polygon face is associated with the target region. Symbolic display when the polygon faces are not associated with the source and target regions.

Where do I find it?

Application Pre/Post
Prerequisites A Simulation file as the work and display part
Command finder Edge-to-Edge Contact
Location in dialog box Manual Edge to Edge ContactSource Region or Target Region group→Create RegionRegion dialog box→Region Objects group→Region Set (next to Select Object)→select internal edge→Select Associated Faces
How do I

Define surface-to-surface contact

Define surface-to-surface gluing (Simcenter Nastran)

Define edge-to-surface gluing

Create an axisymmetric nonlinear contact

Learn more

Contact and glue overview (Simcenter Nastran, Simcenter 3D Multiphysics)

Defining parameters for contact conditions (Simcenter Nastran)

Defining parameters for glue conditions

Previewing contact and glue element locations (Simcenter Nastran)

Surface-to-Surface Contact (Simcenter Nastran, Simcenter 3D Multiphysics, Abaqus, ANSYS)

Surface-to-surface gluing (Simcenter Nastran, Simcenter 3D Multiphysics)

Edge-to-Edge Contact (Simcenter Nastran, Simcenter 3D Multiphysics)

Edge-to-Surface Gluing (Simcenter Nastran)

Controlling the stiffness of edge-to-surface glue (Simcenter Nastran)

Edge-to-Edge Gluing (Simcenter Nastran, Simcenter 3D Multiphysics)

Advanced nonlinear contact for axisymmetric elements (Simcenter Nastran)

Automatic face pairing

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Internal edges for source and target regions, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/xid1929679 · retrieved 2026-07-17