Loads and Constraints

The FEA Editor always keeps separate vertices (duplicate vertices) at the boundaries between different parts. Two or more vertices exist at the same coordinate: one for each part. If duplicate vertices are selected - such as with a rectangle drawn around the nodes on both adjacent parts - and a nodal load or constraint is added, the duplicate vertices are treated as follows:

• The count of selected vertices in the title bar does include the duplicate vertices.
• The load or constraint is applied at all vertices, including the duplicates. If it is inappropriate, then hide the other parts before selecting the vertices.
• If the parts have some type of bonding at the node, then both duplicate loads will be applied to the one node that is created when the Check Model or analysis is performed.
• If the parts have some type of contact, the duplicate vertices will create two nodes, each with one load.

If the type of contact is changed after the nodal load or constraint is applied, then the load or constraint at the common vertices should be inspected for proper behavior and redone if necessary. Duplicate loads or missing loads can occur, depending on the situation.

If using the point selection method at a duplicate vertex and the intent is to pick only one of the vertices, it is suggested to hide all other parts except for the one that is to be loaded or restrained.