Self-intersecting polyhedron - trimming interior surfaces

[Anonymous]

I want to correct the self intersecting planes on my solid body.

I've been playing with self intersecting polyhedron shapes, and I made a "Heptagrammic Trapezohedron". To make the shape, I create each face as its own surface body first, then stitch all those surfaces together to create a solid.

I was surprised to see that Fusion was happy to recognize the resulting shape as a solid body after stitching, but the self intersecting planes are still present.

Here is the link to the design in question: https://a360.co/2St7P3m

Is there a 'best' method for correcting this issue? Preferably it would be something I can implement in the API.

Also, I know 'self-intersecting' can mean other things. Is there a better term to use for this scenario?

Cheers,

Evan

[laughingcreek · Accepted solution]

the stitch tool sometimes creates these Frankenstein objects.  I imagine this form would cause all sorts of modeling grief if left as it.  I can't think of anyway to fix the internal weirdness that results  from stitching this.

I think the better option is to delete the stitch feature and use a boundary fill instead.  see attached.

[TheCADWhisperer]

I didn't quite get a fully parametric/geometric solution - but I am fairly certain it can be done and then controlled with a single dimension (see Attached).

[Anonymous]

Ah yes boundary fill is certainly the better option. Thank you for taking the time the time to answer!

I tried some other operations on the part and it appears to be behaving as expected.

[Anonymous]

That is a clever solution @TheCADWhisperer! I appreciate your input.

I should have been more clear in the original post, but I was hoping for a more generalized method that I could apply to other self-intersecting polyhedron as well.