Flat Ring

The Flat Ring command creates a disc with a hole at its center.

To access this command, go to Draw > Wire Grid / Solid Surface > Flat Ring in the main menu. This action opens the Draw dialog box for the Flat Ring. The dialog box comprises three pages: Flat Ring, Attributes, and Materials, detailed in Fig. 1.

The Flat Ring page

On the Flat Ring page, you can specify the geometrical parameters for the Flat Ring. Here, you’ll find a combo-box offering two options: Curved segments and Straight segments. Choose Curved segments for an exact representation of the flat ring’s curvature. The Straight segments option provides an approximation using linear wires.

The Flat Ring is defined by providing the Center coordinates, Inner Radius (hole radius), Outer Radius, and orientation angles, Theta and Phi. These parameters uniquely define a planar flat ring surface, as illustrated in Fig. 2.

After setting the geometrical parameters on the Flat Ring page, you can move on to the Attributes page. Here, you can specify the number of facets for the Flat Ring and choose whether it should be a wire grid or a solid surface. See Grid/Surface Attributes for additional parameters in the Attributes page and Wire Materials for parameters in the Materials page.