About Volume Regions in Topology Optimization
You can use a volume region to divide a part into multiple volumes. Volume regions are primarily useful for:
• Facilitating mesh refinement.
• Adding heat loads to internal surfaces of a parent volume. In this case, you apply the heat load to one or more of the surfaces created by the volume region.
• Applying different material properties to different volumes. In this case, you apply one material property to your part, and another material to the defining surface for the volume region. The system propagates the material property throughout the volume region.
Creo Topology Optimization uses the
Creo Parametric user interface to create volume regions. Click
Home and then click the arrow next to
Volume Region. Select one of the following methods to create a volume region:
• Extrude—Extrudes a single section. The user interface and the creation method is the same as in
Creo Parametric, but the
Solid/
Surface and the
Remove Material commands are not available.
• 
Revolve—Revolves a single section. The user interface and the creation method is the same as in
Creo Parametric, but the
Solid/
Surface and the
Remove Material commands are not available.
• 
Sweep—Sweeps a section along a trajectory.
• 
Helical Sweep—Creates a volume region based on a sweep along the trajectory defined by profile and pitch.
• 
Blend—Creates a volume region from several blend sections that are created on the same sketching plane and then projected normal to the sketching plane.
• 
Rotational Blend—Creates a volume region from sections that are rotated about the y-axis.
Swept Blend—Creates a volume region based on a swept blend from sections at different points on the trajectory of sweep. The user interface and creation method is the same as in
Creo Parametric, but the
Solid/
Surface and the
Remove Material commands are not available.
The procedure for creating volume region geometry using these options is almost identical to the procedure you use to create similar features in Creo Parametric.
Volume regions are shown in the Model Tree. The Model Tree shows both internal and external sketches used to create volume regions using the Extrude and Revolve methods. After you create the volume region, the system treats the volume region geometry as a region boundary, in effect splitting the bounded area from the parent volume.
For details about base features, see the Creo Parametric Part Modeling help.
For details about surface regions, see the Creo Simulate help.