Culling nodes

About the development of the FEM module/workbench.

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eranalli
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Joined: Tue Aug 13, 2019 2:03 pm

Culling nodes

Postby eranalli » Tue Aug 13, 2019 2:18 pm

I'm trying to use FreeCad to predict the deflection of mirror surfaces due to loading.
After performing an FEM analysis (using CalculiX) how can you get a listing of node positions and associated offsets/stresses/etc, which correspond to a surface? That is, how can you filter the nodes you care about on a particular surface from those spanning the whole volume?
I'm using FreeCad 0.18
Thanks!
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PrzemoF
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Re: Culling nodes

Postby PrzemoF » Tue Aug 13, 2019 2:26 pm

Welcome to the forum! Please read the red pale banner at the top of the page.
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Kunda1
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Re: Culling nodes

Postby Kunda1 » Tue Aug 13, 2019 8:46 pm

Moved to FEM subforum
Want to contribute back to FC? Checkout:
#lowhangingfruit | Use the Source, Luke. | How to Help FreeCAD | How to report FC bugs and features
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bernd
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Re: Culling nodes

Postby bernd » Wed Aug 14, 2019 8:23 am

use vtk post processing in FreeCAD FEM ...


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eranalli
Posts: 2
Joined: Tue Aug 13, 2019 2:03 pm

Re: Culling nodes

Postby eranalli » Wed Aug 14, 2019 3:43 pm

Thanks!
If I understand things correctly, I can fit a best-fit plane or sphere as an implicit function cut. I'll play around with that. I think this is promising.