#### 2.1.9.5. Interface Layer Properties

The Interface Layer is defined by two sets of surfaces:

- The first set is the total surface of the open interface. This is the surface along which a crack can propagate. It is defined by an Oriented Selection Set in Interface Layer Properties dialog under the General tab.

  Figure : Interface Layer Properties - General

- The second set is the surface of the open interface. It is defined by an Oriented Selection Set in Interface Layer Properties dialog under the Open Area tab.

  Figure : Interface Layer Properties - Open Area

The Interface Layer can be activated or deactivated with a check box. You can also change the global number of an Interface Layer (Global Ply Number). Interface Layers are only taken into consideration in solid model generation and further processes. All shell based analyses ignore any Interface Layers.

Release 18.2 - © ANSYS, Inc. All rights reserved.