Example 2. Interlocking rings

The following example is composed of two rings of constant cross-section that can be swept along their axes. The problem here is that the rings overlap, forming a tetrahedral shape which cannot be swept. The key to solving this problem is separating out the region of overlap, explicitly setting the source and target surfaces, and using the tetprimitive scheme on the tetrahedral region.

Suggested webcuts

Webcut	Command
	Coreform Cubit> webcut body 1 plane surface 5
	Coreform Cubit> webcut body 2 sheet extended from surface 4
	Coreform Cubit> webcut body 3 plane surface 12
	Coreform Cubit> webcut body 4 sheet extended from surface 10 Coreform Cubit> imprint all Coreform Cubit> merge all

There are five volumes that result from the webcutting. Two of them are automatically sweepable. Two of them must have their schemes set explicitly, and one of them is meshed using the tetprimitive scheme.

Webcut	Command
	One-to-one Sweepable Source and target are set automatically using autoscheme Coreform Cubit> volume 1 3 scheme auto
	One-to-one Sweepable Must have source and target set explicitly Coreform Cubit> volume 2 scheme sweep source 17 target 7 Coreform Cubit> volume 4 scheme sweep source 29 target 18
	Non-sweepable Use the tetprimitive scheme Coreform Cubit> curve in volume 5 interval 6 Coreform Cubit> volume 5 scheme tetprimitive Coreform Cubit> volume all size 0.5 Coreform Cubit> mesh volume all

Final mesh

The final mesh is created at a size of 0.5 for all volumes.