Preform Surface (Dual Domain) dialog

The Preform Surface (Dual Domain) dialog is used to specify the properties of the selected Dual Domain elements or regions of type Preform surface (Dual Domain).

The set of property values defined by the dialog are saved to a property set with the description shown in the Name box. In addition, you may be given the option to also apply the property values to related entities in the model.

Note: Do not assume that there is only one orientation direction for the entire part. Areas such as vertical ribs may require you to specify a different fiber-mat preform orientation to the rest of the part.

Dialog elements

Preform	Allows you to specify the preform (fiber mat) material. If you need to make changes to an existing preform, select the preform and then click Edit.
Thickness	Specifies how the thickness of the selected element(s) in the Dual Domain mesh is to be determined. The following options are available: Auto-determine The analysis establishes the thickness of the element by measuring the gap between the two adjacent Dual Domain mesh skins. Specified The analysis uses the specified thickness. This allows you to vary the thickness values for a Dual Domain mesh without having to modify the part in your CAD system and then re-import and mesh the part.
Dual Domain type	Specifies how the Dual Domain mesh match classification for the selected element(s) in the Dual Domain mesh is to be determined. The following options are available: Auto-determine If this option is selected, the solver automatically classifies the element as "matched", "edge" or "unmatched". Specified Select this option to manually assign a mesh match classification of "edge" or "unmatched" in cases where the automatic classification gives the wrong result, as shown in the Dual Domain Mesh Match diagnostic plot.
Preform orientation	Specifies the principal direction 1 of the fiber mat preform in global coordinates. The following principle direction 1 orientations can be set: Along the x-axis: dx=1, dy=0 dz=0. Along the y-axis: dx=0, dy=1, dz=0. 45° from the x and y-axes: dx=1, dy=1 and dz=0. Note: It is recommended that you specify this orientation because, for an anisotropic fiber mat, the fiber-mat permeability in principal direction 1 is different from the fiber-mat permeability in principal direction 2, and the fiber-mat cross permeability may or may not be zero.
Occurrence numbers	Occurrence numbers are used to specify the number of times that a given flow path is repeated in a model. Enter the required occurrence number. Important: If you intend to proceed with a Cool, Shrink, Warp or Stress analysis, you cannot use occurrence numbers. You must model the part in full.