Culling nodes

About the development of the FEM module/workbench.

Moderator: bernd

Post Reply
eranalli
Posts: 2
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!
Top
User avatar
PrzemoF
Posts: 2655
Joined: Fri Jul 25, 2014 4:52 pm
Contact:
Contact PrzemoF

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.
Top
User avatar
Kunda1
Posts: 5913
Joined: Thu Jan 05, 2017 9:03 pm

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
Top
User avatar
bernd
Posts: 8468
Joined: Sun Sep 08, 2013 8:07 pm
Location: Zürich, Switzerland

Re: Culling nodes

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

use vtk post processing in FreeCAD FEM ...


post.FCStd
(119.47 KiB) Downloaded 15 times

screen.jpg
screen.jpg (425.26 KiB) Viewed 283 times
Top
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.
Top
Post Reply
Powered by phpBB® Forum Software © phpBB Limited