The interface with solid condition establishes continuity between two sides of the intersection between different elastic sub-tasks. For the elastic momentum equation, the interface with solid condition guarantees continuity of the displacement field and of the contact forces. The interface with solid condition is available only for the boundary section that is defined by an intersection with an adjacent subdomain.

If you define an interface with solid condition for one sub-task, you must also define this condition for the sub-task on the other side of the boundary section. To define an interface with solid condition between two elastic sub-tasks, choose Interface with solid from the list of boundary conditions.

  Interface with solid