topic Re: Meshing Error!, Surface Meshing, Geometry Error in Fusion Design, Validate & Document Forum

Meshing Error!, Surface Meshing, Geometry Error

Anonymous — Thu, 18 Jun 2020 18:03:03 GMT

I've been working on a model and when I'm trying to do a static simulation study, this error message keeps on popping up. I've tried to solve all the geometric problems, at least whatever I knew of, but still end up doing no good. The exact error message reads:

Meshing error

Phase: Surface Meshing

Description: Geometry error

and points to 2 locations on the model whose screenshots are attached below. Try and help me out here. The link to the model has also been attached for your better understanding. Thanks for the help and Cheers!!

Re: Meshing Error!, Surface Meshing, Geometry Error

TheCADWhisperer — Thu, 18 Jun 2020 18:10:52 GMT

Can you idealize the geometry for FEA by removing the thin webbing features?

Re: Meshing Error!, Surface Meshing, Geometry Error

mcmillr — Thu, 18 Jun 2020 21:29:39 GMT

You could try the geometry repair tool to see if the geometry issues can be fixed.

In the Design environment, right click on the browser root and choose 'Do not capture design history'. Note that this might break load/constraint references in your current study once the model is changed.

Under Inspect you should see a command called Validate. Pick the part that has the issues and check the Repair checkbox, then press OK. Fusion will tell you if it found and fixed any errors.

If one or more faces could not be fixed, they will be unstitched so you can inspect them for issues. You can sometimes just delete these bad faces and then create a boundary patch and then stitch the new face in the Surface tab.

If this doesn't work, you could try to apply a smaller mesh size to the faces that are having issues, using Manage, Local Mesh Control when in the Simulation env.

If that still doesn't work, you might need to simplify the geometry in those areas as the user user suggested.

Hope this helps!

Re: Meshing Error!, Surface Meshing, Geometry Error

Anonymous — Fri, 19 Jun 2020 07:42:37 GMT

The reason behind putting the webbing feature or the generative mesh is to reduce the overall mass while providing the same support structure as would have been with a surface mass. That's why removing this feature would mean lesser structural support and adding a solid surface mass in place of the same would mean an increased overall mass which is kind of undesirable.

Re: Meshing Error!, Surface Meshing, Geometry Error

Anonymous — Fri, 19 Jun 2020 07:45:31 GMT

Will definitely give the repair geometry tool a try. I hope it solves the problem. Coming to the mesh sizing, I've already done that plus also tried applying a local mesh control to the specific faces showing error but the results were pretty much the same.

Re: Meshing Error!, Surface Meshing, Geometry Error

Anonymous — Tue, 23 Jun 2020 08:41:53 GMT

Thank You for the help. The solution provided by you worked pretty well.

Re: Meshing Error!, Surface Meshing, Geometry Error

andyliszewski — Sat, 10 Dec 2022 00:31:02 GMT

I am having the same problem while trying to test a small section of thread until failure in axial tension but I can't get past generating a mesh. I repeatedly get a "Meshing error! Phase: Solid meshing. Description: Face topology." message. I have tried mesh element sizes from 0.04 to 0.8mm with no success. I also tried the above solution (mcmillr) with no success. I appreciate any help anyone can offer.

Re: Meshing Error!, Surface Meshing, Geometry Error

laughingcreek — Sat, 10 Dec 2022 00:47:03 GMT

I think there is something off about this model, where did it come from?

You can see what I mean from this projection of the thread valley-

p.s. it's preferred that you NOT zip your model files, takes several more steps on this end to open and then tidy up after.

Re: Meshing Error!, Surface Meshing, Geometry Error

andyliszewski — Sat, 10 Dec 2022 01:02:46 GMT

OK thank you I won't zip files anymore.

I created it by creating a shaft (diameter 2.5mm) and then applying a thread to it with the thread function. So do you think it is a problem with AutoDesk's thread function?

Re: Meshing Error!, Surface Meshing, Geometry Error

mcmillr — Mon, 12 Dec 2022 15:17:09 GMT

The Validate command does not detect any problems, but the part looks like imported geometry, not something created by Fusion since the timeline contains only a 'base feature'. Can you supply the original file with the thread feature?

Re: Meshing Error!, Surface Meshing, Geometry Error

andyliszewski — Mon, 12 Dec 2022 20:49:27 GMT

Yes please see attached. I had tried the previous solution on that file, which included turning off "design capture history." But I made this file by creating a simple shaft and applying a thread to it with the thread function.

Re: Meshing Error!, Surface Meshing, Geometry Error

mcmillr — Mon, 12 Dec 2022 22:45:06 GMT

Thanks, I have logged a defect and an engineer will be looking into it.

Re: Meshing Error!, Surface Meshing, Geometry Error

andyliszewski — Fri, 16 Dec 2022 00:46:52 GMT

@mcmillr Update: I made an M2.5 thread manually by creating the thread profile and sweeping it along the profile of a coil. I got the same error message when creating a mesh for this shape. Please see the attached file.

Re: Meshing Error!, Surface Meshing, Geometry Error

jesus.rodriguezX55VX — Fri, 16 Dec 2022 16:54:38 GMT

Hello @andyliszewski

Could you please try the following mesh settings?

The model is quite challenging in some areas, hence the meshing failures. By relaxing the Aspect Ratio and not using curved elements, it should mesh and give you meaningful results:

Re: Meshing Error!, Surface Meshing, Geometry Error

andyliszewski — Fri, 16 Dec 2022 18:37:39 GMT

Ah OK, thank you!