Creating Groups Manually

You can manually select nodes, element edges, element faces, or elements from a mesh to include in a mesh group. You can also select nodes and elements from contributing finite element models.

See Also
About Groups
Group Definition Methods
  1. Do either of the following:
    • To create a mesh group in the Groups container, select the Group section of the action bar and click Manual Group .
    • To create a mesh group under a mesh, right-click the mesh in the tree and select Create Group > Manual Group.
    The Manual Group dialog box and the Select toolbox appear.
  2. Optional: Enter a Name for the group.
  3. Select the type of entity that is stored in the mesh group—nodes, element edges, element faces, or elements. A mesh group can contain only one type of entity.
  4. Select Add Mode to add your selection to the group.
  5. Select entities to add them to the mesh group.

    The Select toolbox enables you to choose a selection method for adding entities.

    Note: The available methods depend on the type of entity chosen in Step 3.

    MethodDescription
    Selects entities manually. This method is the default selection option and the only method for edge selection.
    Selects the entities that are entirely within a bounding polygon.
    Selects the entities that are within a bounding polygon and any entities that are intersected by the polygon.
    Selects the entities that are entirely within a bounding polygon that are visible and non-visible entities.
    Selects the entities that are within a bounding polygon that are visible and non-visible entities.
    Selects the entities that are entirely within a bounding box.
    Selects the entities that are within a bounding box and any entities that are intersected by the box.
    Selects the entities that are entirely within a bounding box that are visible and non-visible entities.
    Selects the entities that are within a bounding box that are visible and non-visible entities.
    Selects a group of element edges by propagation. You can specify the propagation criteria using either of the following methods:
    • Select by edge angle < and specify an angle. When you click Propagate, any edges that are connected to the selected edges by an angle smaller than the specified angle are included in the mesh group.
    • Select by face angle > and specify an angle. When you click Propagate, any edges that are connected to the selected edges by an angle greater than the specified angle are included in the mesh group. This method enables you to select edges around 3D holes and sharp edges.
    Selects a group of 2D elements or a group of faces from 3D elements by propagation. Select entities, specify the propagation angle in the by angle < box, and click Propagate. Any entities that are connected to the selected entities by an angle smaller than the specified angle are included in the mesh group.
    Selects a group of nodes around a 2D hole.
    Selects a group of element edges around a 2D hole.
    Selects a group of elements around a 2D hole. When you click Propagate, any elements that are connected to the selected elements are included as a second layer in the mesh group.
    Selects a neighborhood of elements (a group of elements that border your selected elements). For element faces, the neighborhood includes elements that share an edge with your selection; for elements, the neighborhood includes elements that share a face with your selection.
    Selects elements that are bad according to mesh quality settings so that you can review, edit, or repair them.
    The selected entities are highlighted.
  6. If your selection includes mesh entities that you do not want to include in the group, do the following:
    1. Select Remove Mode.
    2. Select entities to remove from the mesh group.
      Highlighting is removed from the selected entities.
  7. To make the group eligible for use with simulation connections, do not select Include connection elements. This works for both groups in the Groups container and groups under a mesh.

    Note: Connections are defined in the Structural Model Creation app.

  8. Click one of the following:
    • OK to save your selections and to close the dialog box. To generate and visualize the group, you must update it.
    • Update to save your selections, close the dialog box, and update the group.
    • Cancel to cancel the modifications and to close the dialog box.
    If you click OK or Update, the group is created and appears in the tree. In addition, for native solves, the group appears immediately in post-processing. In Physics Results Explorer, the new group can be viewed directly in the model, in the specification tree, and listed in the Display Groups dialog box under the Groups item.

Note: When you use mesh groups as supports, the symbol positioning is intended only to indicate support for the feature. The feature symbols might not cover the mesh region as they do for a similar geometry region.