I'm quite new to FreeCAD. I tried to import .stl from blender and run FEM analysis on it, but every time I get error similar to this (when running CalculiX):
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*ERROR in solidsections: *SOLID SECTION can
not be used for beam or shell elements
Faulty element: 46228
Created FEM mesh looks weird. (see pic2) It looks like some faces between edges are missing. (Part of mesh not shown on picture looks good.)
I have tried Part / Refine shape, and change some random settings I found in forums. Nothing worked.
Picture 1 shows another result. I can see yellow faces from inside of "cabin" (it's hard to see in picture).
It would be great, if there are some steps, which could automagically transform mesh to same looking, but correctly working mesh.
(I have tried same steps with simple extruded cube (also imported from Blender), and everything worked, so I guess I have CalculiX and Netgen properly installed.)
I attached .stl with low face count, so operations are bit faster.
Please help. I'm trying to fix it for few days. Also, if you find solution, please share also debugging tips how you found it.
Here is info about my instance of freecad (I'm using newest from PPA):
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OS: Linux Mint 18.1 Serena
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.16.6707 (Git)
Build type: None
Branch: releases/FreeCAD-0-16
Hash: 5465bc47c95db45e0be85dc0e2872419efadce0f
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17