Splitting elements by inserting nodes

The Insert Nodes command in the Mesh Tools dialog is used to split an existing triangle or tetrahedral element into smaller elements by inserting a new node either midway along an edge of a triangle, or in the center of a triangle or tetrahedron.

1. Click (Mesh tab > Mesh Repair panel > Insert Nodes).
2. Select whether you want the new node to be inserted midway along a triangle edge, or in the center of a triangle or tetrahedron. Depending on your selection, either two or three of the Node 1/2/3 input boxes are active, or the Tetra to split input box is active.
3. If the mesh nodes are not visible, turn on the relevant layer(s) in the Layers pane.
4. Specify the required number of nodes either by selecting them in the model pane, or by entering their numbers manually, e.g. N123, in the text boxes.
   Note: the Insert Nodes command will only work if the selected nodes all belong to the same element.
5. Click Apply to insert a new node at the specified location. New element edges are automatically created to split the existing element into smaller elements.