Begging for help regarding temperature FEM analysis

About the development of the FEM module/workbench.

Moderator: bernd

UR_
Posts: 1188
Joined: Tue Jan 03, 2017 8:42 pm

Re: Begging for help regarding temperature FEM analysis

Postby UR_ » Tue Apr 07, 2020 1:21 pm

lighting_freak wrote:
Sun Apr 05, 2020 8:43 pm
There seems to be no chance to select the inner solid with current FreeCAD version.
There is an easy workaround to circumvent this difficulty. ;)

Please see this example:
Here we have three nested cubes made from three different materials (copper, aluminium and steel)

Screenshot 002.png
Screenshot 002.png (7.8 KiB) Viewed 96 times

It's designed by using PartWB->BooleanFragments, which is referenced for meshing as usual.

But for material assignment, "BooleanFragments" is exploded using PartWB->ExplodeCompound:

Screenshot 001.png
Screenshot 001.png (25.17 KiB) Viewed 96 times

to get these three solids:

ExplodedBooleanFragments.png
ExplodedBooleanFragments.png (11.02 KiB) Viewed 96 times




Selecting correct solids is no magic, if visibility is set carefully before invoking dialog of material assignment.

Screenshot 003.png
Screenshot 003.png (31.46 KiB) Viewed 96 times

References for meshing, material assignment and other constrains needs to be equal but not the same. ;)

CubeInCube.FCStd
(21.48 KiB) Downloaded 5 times

version:
OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.20415 (Git)
Build type: Release
Branch: master
Hash: 7a0606715045a255ef0774e835b0091eef300ac9
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: German/Germany (de_DE)
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bernd
Posts: 10698
Joined: Sun Sep 08, 2013 8:07 pm
Location: Zürich, Switzerland

Re: Begging for help regarding temperature FEM analysis

Postby bernd » Wed Apr 08, 2020 9:05 pm

this is a good find :D