Define a Rosette
A reference coordinate system that defines a reference direction for the ply and core orientations.
You must define a layup surface before defining the rosette. To learn how to define the layup surface, see Define the Layup Surface.
You can define multiple rosettes in a Composite feature. The last rosette defined is set as the default rosette and it is identified by 
.
.You can specify how the origin and the direction of the rosette are projected on the layup surface for the draping simulation by selecting the rosette type as Cartesian, Radial, Cylindrical, or Spherical.
• Cartesian—The local zero-degree direction is evaluated at any point on the design surface as a projection of the X-axis of the rosette on the local surface. When the X-axis of the rosette is perpendicular to the local surface, the projection of the Z-axis of the rosette is used as an alternative.
• Radial—The local zero-degree direction is evaluated by calculating a vector that extends from the origin of the rosette to the local point and then projecting the vector on the local surface. When the vector cannot be projected, the projection of the X-axis of the rosette is used as an alternative.
• Cylindrical—The local zero-degree direction is evaluated along the circumference around the Z-axis of a rosette in the clockwise direction, following the left-hand screw rule. When the local zero-degree direction cannot be evaluated, the projection of the X-axis of the rosette is used as an alternative.
• Spherical—The local zero-degree direction is evaluated along the circumference around the Z-axis of a rosette in the anticlockwise direction, following the right-hand screw rule. When the local zero-degree direction cannot be evaluated, the projection of the X-axis of the rosette is used as an alternative.
• Curve-based—The reference direction follows the selected curve. The local zero-degree direction at any point is evaluated by calculating the tangent vector at the nearest point on the curve, and then by projecting that vector on the local surface at the evaluation point. When the local zero-degree direction cannot be evaluated, the projection of the X-axis of the rosette is used as an alternative.
 | • You can create many rosettes with different rosette types, and then select an appropriate rosette when you create a laminate object. Using the appropriate rosette type for the specific ply shape can produce more accurate draping results, eliminating the need for multiple Cartesian rosettes. • You can analyze a composite structure in Creo Simulate and export its analysis model to a Nastran file only when the rosette type of each ply is Cartesian. |
Define a rosette as follows:
1. Click 
Rosette. The Rosette Coordinate System dialog box opens.
Rosette. The Rosette Coordinate System dialog box opens.2. To place the rosette, do one of the following:
◦ Place the rosette on the layup surface as follows:
1. To place the origin of the rosette, click anywhere on the layup surface. A preview of the rosette coordinate system appears in the graphics window.
2. To change the offset type, select a different offset type in the Type box.
3. To select offset references, drag the offset handles to references, or click the Offset references collector and select offset references.
◦ Place the rosette freely as you would a coordinate system by selecting up to three placement references. References can be surfaces, planes, edges, axes, curves, datum points, vertices, or a coordinate system.
3. To orient the rosette, click the Orientation tab, and do one of the following:
◦ References selection—Orients the coordinate system by selecting references for two of the axes.
For each of the direction collectors, select a reference and select a direction name from the list.
a. For the first direction:
i. Click the Use direction collector and select a reference to orient the first direction.
ii. From the to determine list, select the axis to lie along the first direction.
iii. To flip the first direction, click Flip.
| | By default, the first direction of the coordinate system is assumed to be parallel to the first origin reference. If the reference is a straight edge, curve or axis then the coordinate system axis is oriented parallel to that reference. If a plane is selected then the first direction of the coordinate system is oriented normal to the plane. |
b. For the second direction:
i. Click the Use direction collector and select a reference to orient the second direction.
ii. From the to project list, select the axis to lie along the second direction.
iii. To flip the second direction, click Flip.
| | The system calculates the second direction by projecting the second reference to be orthogonal to the first direction. |
◦ Selected CSYS axes—Orients the coordinate system by rotating it around the axes of the coordinate system that is used as a placement reference.
For each axis, perform an action:
▪ Type a value in degrees in the value box.
▪ Right-click the graphics window and choose Orient from the shortcut menu. Use the drag handle to position each axis.
| | Click the drag handle at the center of the coordinate system to rotate the coordinate system about each of the reference coordinate system's axes. To change directions, point to the drag handle and then move the pointer toward one of the axes. As you move the cursor toward the axes, the drag handle changes direction. |
◦ Set Z Normal To Screen—Orients the z-axis perpendicular to the screen.
4. The rosette type is set to Cartesian by default. To change the rosette type, do the following:
a. In the Rosette Coordinate System dialog box, select the Properties tab.
b. In the Type box under Projection on Layup Surface select a different rosette type.
▪ When you select the Curve-based option in the Type box, click in the Curve collector, and then select a curve to define the projection.
5. Click OK.
A rosette feature is created in the Composite Tree and a rosette coordinate system is created under Setup Items.
Change the Default Rosette
The default rosette is automatically selected when you define plies and cores.
Change the default rosette as follows:
1. In the Composite Tree, select the rosette to set it as the default rosette.
2. Click 
.
.Identify a Rosette Based on the Projection Type
In the Composite environment, you can use the Search Tool to identify the rosettes with a specific projection type. This is useful when you create laminate objects or perform a draping simulation on the laminate objects.
1. Click 
Find on the status bar. Alternatively, click > Find. The Search Tool dialog box opens.
Find on the status bar. Alternatively, click > Find. The Search Tool dialog box opens.2. In the Look for box, type or select Rosette.
3. In the Look in box, make sure that the composite feature is selected.
4. In the Attributes tab, select Property.
5. Specify the settings under Criteria as follows:
a. In the Property box, select Projection Type.
b. Select an appropriate option in the Comparison box. To find the rosettes with specific rosette type, make sure to select is equal to. To find the rosettes that does not have the specific rosette type, make sure to select is not equal to.
c. In the Value box, specify the rosette type.
6. Click Find Now.
| | You must click Find Now after you change the settings under Criteria. |