### 3.4.1. Solid CAD Geometry

An external core geometry can be used to define the variable core thickness. The 3-D shape of the core is modeled in a CAD tool as a 3-D solid or a closed shell. This CAD Geometry can be imported directly into ACP or via Workbench.

Figure : Imported Core Geometry

In the Thickness tab of the Modeling Ply Properties dialog, the thickness definition can be changed from Nominal to From Geometry. In this case, ACP samples through the geometry in the normal direction and evaluates the thickness of the core for each element. The original thickness defined in the Fabric definition becomes obsolete. This method is used in the Class40 example..

Figure : Modeling Ply Thickness Definition

Figure : Section with Variable Core Thickness

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