any idea why my shell is not working
Hi @581876 ,
- Reduce Complexity: Ensure that the geometry of the body is not overly complex, as excessive complexity can lead to difficulties during the shell operation.
- Wall Thickness: Choose a suitable wall thickness that is appropriate for the size and scale of the body. The thickness should be consistent and feasible within the confines of the geometry.
- Fillets and Chamfers: Be cautious with bodies that have fillets and chamfers, as these features can complicate the shelling process if not handled properly.
- Drafts and Undercuts: Watch out for drafts and undercuts, as they can interfere with shell creation.
I'm not sure if this is something that you are expecting as an outcome.
Hi! Ideally, the Shell should work in this case. However, the imperfect conditions on the body (high curvature, loose tolerance, and asymmetry) prohibit the operation from succeeding. The rudder at the bottom is already very thin, so there isn't much room to hollow. I assume it can be ignored. Here is a solution by omitting the rudder. Although the procedure isn't straight forward, it should be highly doable. The Shell thickness can be achieved up to 2.5".
Many thanks!
Johnson Shiue (johnson.shiue@autodesk.com)
Software Test Engineer
Hi,
If you want such a small wall thickness with all of the detail then maybe
the Tool you want is Surface and the Offset.
For some reason Fusion will get its knickers in a twist with the Shell
command if you go two small but has no issue with the Surface Tools.
To make it a Body to work with just use the Thicken Tool. Offset will
work with very small numbers but Thicken will only go to 0.0001 mm.
Cheers
Andrew
Rather than stitching questionable surfaces ( the fin!) into a solid, I would work with the untrim tool in the surface workspace.
That way, the body of the boat, without the fin and fillet, can be recovered in its original form and easily shelled to high wall thicknesses.
The Fin, on the other hand, has some serious problems.
In general, this model suffers from the use of inappropriate surface modeling techniques.
Mr. @MichaelT_123,
While I would generally agree that such tools would be invaluable - similar features are available in mesh modeling tools such as Blender - I don't think that smoothing alone would be sufficient, as the outcome of such operations would need to be inspected and evaluated by a trained operator to be useful.
Operators with that skill level usually aren't beginners or even intermediate Fusion users.
I tried this in two other CAD applications I have access to. ZW3d 2020 and SolidWorks 2024.
I could get the main body of the boat to shell in all three applications.
Only in SolidWorks was I able to shell the fin to 2mm of 5mm.
Shelling to 5mm would provide pretty bad results.
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