topic Re: Create Nesting Shapes in Fusion Design, Validate & Document Forum

Create Nesting Shapes

ant_9EMCL — Thu, 27 Feb 2025 09:08:42 GMT

I have a polygonal shape that is hollow with some wall thickness. I want to split this shape into 2 separate bodies. The 2nd body should be created by 1) splitting at the midplane between each of the inner and outer faces and 2) then "carving out" or extracting the resulting inner shape. The result should be 2 polygonal shapes, both still hollow and the new smaller body that fits and aligns with the interior edges and faces of the bigger polygonal shape, similar to the Russian nesting dolls.

See pic for base template. File is attached.

Additional Notes:

I created midplanes (where the split should be) between the inner and outer faces in hopes to create points at their intersections and then carve the new body from there. But I'm not sure how to do that.
There is a reason why I need the body to be internally carved out in this way instead of just creating a scaled down version of the original body.

Thank you!

Tips from @jhackney1972 or other are appreciated 🙏

Re: Create Nesting Shapes

jhackney1972 — Thu, 27 Feb 2025 13:35:07 GMT

You are not real clear on the final result. Do you have a picture or sketch showing close to what you want?

Re: Create Nesting Shapes

ant_9EMCL — Thu, 27 Feb 2025 14:54:18 GMT

The best example of the final result that I can give is Russian Nesting Dolls, except I want to do that polygonal shapes. I do not want to create this by simply copying the original shape and scaling down to make a new smaller one. Instead I want to "split" the original shape to make the new smaller inner shape.

3 sketches are attached here.

Sketch 1: In the section analysis view, this is what the original object shape looks like with the red construction line showing where the splitting of the body should be. It's an internal split.

Sketch 2: After the body is split or "carved out", there should be 2 bodies. The inner shape should nest perfectly inside the original outer shape.

Sketch 3: When section analysis view is turned off, then we should be able to separate the bodies from one another like Russian nesting dolls can be separated.

Re: Create Nesting Shapes

evanp4509U4JZ — Thu, 27 Feb 2025 15:19:57 GMT

I didn't use any specific dimensions but is this what you're looking for? Offset faces in surface environment, thicken offset surfaces, Use thickened surfaces as tool in Combine/Cut operation. No idea why it wouldn't thicken as a single piece after turning off Section analysis.

Re: Create Nesting Shapes

TrippyLighting — Thu, 27 Feb 2025 15:51:27 GMT

Here's my version:

No sketches, not construction geometry.

Re: Create Nesting Shapes

ant_9EMCL — Thu, 27 Feb 2025 15:52:50 GMT

This is very close! 🙂 The only additional change to make is instead of creating a separate splitting body in between the inner and outer bodies as you've done...your splitting body and your inner body should be combined as a single body. So there will only be 2 bodies as the final result. In a section analysis view, here is a rough edit what would look like inside (see attached pic). The exterior faces of the inner body and the interior faces of the outer body are practically touching each other with no gapes in between.

I'll try using your Offset faces method, but without thickening them before the Combine/Cut operation

Re: Create Nesting Shapes

ant_9EMCL — Thu, 27 Feb 2025 16:10:02 GMT

Ahh okay, I see what you did there. You made the shape into a solid in the beginning and just continued to shell out the interior in intervals. I can definitely adopt this approach as well. This will work. Thank you! 🙂

Re: Create Nesting Shapes

ant_9EMCL — Thu, 27 Feb 2025 16:11:48 GMT

So I used your approach and Combined/Joined the splitting body and interior body into which is basically what I need. Thank you so much for your help! 🙂