Creating Plies From Zones

	This task shows you how to create plies from zones.
	Open the Plies1.CATPart document.
	Use stack-up file Create plies without staggering Create plies in a new group Create plies from zones with taper Create full plies and ETBS Generate staggering data file
	Click `Plies From Zones` . The `Plies Creation` dialog box is displayed. Select the group of zones from which you want to create plies.
	You can insert plies after a sequence or a plies group (if any): in the specification tree, simply select the sequence or the plies group where you want the plies to be inserted.
	Use stack-up file: If needed, import the stack-up file you may have previously created by selecting the`Use Stack-Up File`check box. The import enables you to manually modify the provided stack-up and create the correct laminate. Please note that you can only modify the plies order. The path is the one you either defined manually or the document's path, it is automatically displayed in the field.
	Importing the stack-up file enables you to modify the default stack-up.
	Create plies without staggering: If needed, select the `Create Plies without staggering` check box to create plies without a staggered geometry. Create plies in a new group: By default, the `Create plies in new group` check box is selected. The plies will be created in a plies group under the stacking. Create plies from zones with taper: If needed, select the `Create plies from Zones with Taper`check box to create plies from zones with a transition zone. Create full plies and ETBS: If needed, select the `Create full plies and ETBS` check box to create plies and the corresponding ETBS (edges to be staggered). The ETBS can be used later on when using the limit contour feature to modify the plies. An ETBS group is created for each zones group.In case you modify the contours of the zone in zones group, the corresponding ETBS group is modified as well and an update icon is displayed on the ETBS's. You should then click `Update` for the changes in the zone group to be propagated to the ETBS's. In addition to the ETBS group, a feature corresponding to the external contour, that is, the edge of part (EOP), of the zone group is generated. The full plies contour is the input geometry of all the plies contours. Therefore, if you modify the contour of zones group, the change is propagated to the full plies contour and the plies contour as shown in the example below. Select `Plane.2` in the geometry. This plane is the one on which `Zones Group.1` is defined. Double-click the plane to open the `Plane Definition` dialog box. Modify the offset value to -100mm. Click `OK` to validate. The contour of the zones group moves, so does the the full plies contour and the plies contour. Select the contour of `ply.1` to check it has been updated as well after modifying the zones group contour.
	The associativity between the EOP of the zones group and the plies exists at the geometrical level, not the laminate. In case there is a change of surface, any modification made on the plies is kept on the new surface.
	In certain cases, when the full plies contour is modified, the user is warned that the ply contour will be modified accordingly. For instance, the CATPart below is made of two zones: You want to modify the contour of `Zone 2` as shown below: When you add the contour to `Zone 2` in the `Zone Definition` dialog box, an information message is displayed: An additional full plies contour is created, as well as another ply contour. If the ply contour has been modified before you create an additional contour to the zone, the ply contour is in last position in the specification tree. For instance, in the CATPart shown below, a limit contour has been created on `Ply.1`. You want to modify the contour of `Zone.2` by creating a contour inside the zone. When you add the contour to `Zone 2` in the `Zone Definition` dialog box, an information message is displayed: An additional full plies contour is created, as well as another ply contour. The limit contour feature is in last position in the specification tree.
	Generate staggering data file: If needed, select the `Generate staggering data file` to create a file containing the values of each ETBS. You can click the `...` button to define the path where to store the staggering data file. If you want to see the staggering data file content after creating the plies, check `Open Staggering Data File after creation`.
	The edges to be staggered are created in an open body. All the created plies share the same EEOP as the Composite part. This data file provides the following information: the shapes, the sets of zones, direction, number of plies for each shape, the names of the plies for each shape, the set of edges to be staggered for each shape, the value, the step and the direction of each edge to be staggered, the InvRelDir column that enables you to change the side of the material that is kept for each shape. The ETBS are sorted in consecutive geometrical order. In our example, `ETBS.1, ETBS.5, ETBS.4, ETBS.3` and `ETBS.7`are consecutive. If there are two sets of ETBS that are to be used to relimit the same set of plies, an empty space is inserted in the ETBS column between the various set of ETBS. Inserting an empty space between each ETBS of the shape will create distinct limit contours. Example: There is no empty space between `ETBS.1` and `ETBS.2`. Their data will be read together and this will create one limit contour. The data of `ETBS.3` and `ETBS.4` will also be read together and will create one limit contour. As there is one space between `ETBS.1/ETBS.2` and `ETBS.3/ETBS.4` the two contours created will be distinct. Click `OK` to create the plies with the default options selected.
	The data contained in the Staggering Data file can then be used to create a limit contour feature for each ply. Refer to the Creating a Limit Contour section for more information. The Stacking node includes the set of sequences (order), and for each sequence, the associated ply (containing the Attributes and the Geometry). Here is the result of the plies creation from both Zones Groups.> Result of the plies creation from Zones Group.1 Result of the plies creation from Zones Group.2
	Plies are displayed in the 3D geometry according to a color code depending on their orientation.
	Right-click `Plies Group.1` and select `Plies Group.1 object`, then `Reorder children`. The sequence of plies are displayed in the `Reorder Children` dialog box. Select `Sequence.5` for instance and use the up and down arrows to modify its place in the stacking. Click `OK`. The specification tree is modified accordingly. Right-click `Ply.1` and select `Ply.1 object`, then `Change Geometrical Set`. The following dialog box is displayed, in which all the elements of the specification tree are available. Select the sequence you would like to move `Ply.1` to. In our example we selected `Sequence.4`. Click `OK`. The specification tree is modified accordingly.
	Note that the `Change Geometrical Set` command enables you to move a ply from one sequence to another, whereas performing a copy/paste of a ply in a sequence creates a new ply. Moving a ply using the `Change Geometrical Set` command is taken into account when synchronizing a manufacturing document. Note that the ply points to the material cache feature stored in the `Composites Parameters`.
	When selecting the ply contour in the specification tree, the ply is highlighted in the model; information is displayed in the status bar.

	To easily locate the ply in the specification tree: select it in the model:
	Make sure the stacking is in pickable mode in `Edit -> Properties -> Graphic` tab.
	right-click it, then select`Center graph`. The ply and its contour are automatically expanded in the specification tree.
	If you need to hide or display the geometry you need to work on (i.e. stacking, sequence or ply), right-click the appropriate node in the specification tree and select `Hide/Show 3D contour`.
	For more information on geometrical sets, refer to Managing Geometrical Sets.