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by fandaL
Sat Nov 02, 2019 9:12 pm
Forum: FEM
Topic: CalculiX contact surfaces
Replies: 2
Views: 391

Re: CalculiX contact surfaces

I need to solve a contact problem having slightly more complicated geometry than in this problem, but is essentially quite similar. Here I have made a corner out of three fixed blocks. The fourth block is supposed to move into the corner and stop. Here's my CalculiX input file. What should it be so...
by fandaL
Fri Oct 18, 2019 1:52 pm
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

There was a bug related to FC0.18. Now it should be fixed, so you can download updated file https://github.com/fandaL/beso/blob/master/beso_fc_gui.py Just a note to be sure: If you create new materials and have beso gui already opened, you should click "Update domains". But be sure to also recreate ...
by fandaL
Thu Oct 17, 2019 9:50 pm
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

Hi All, Can anyone describe how exactly should I prepare model and mesh if I ahve a regions which i don't want to optimize ? I am trying with boolean operatons but it seems to not work. Hi Blaze, Ordinary FreeCAD way for multiple materials (instead of booleans like cut, union, and intersection) is ...
by fandaL
Thu Oct 10, 2019 9:16 pm
Forum: FEM
Topic: 2D axisymmetric
Replies: 1
Views: 245

Re: 2D axisymmetric

CalculiX can do it so after modifying inp file from FreeCAD, you could get it working. Maybe this can help for the beginning: Create a 2D model in xy plane where y is the axis of symmetry, as if you are making shell analysis, but do not constraint nodal rotations. Write inp file, modify element type...
by fandaL
Thu Oct 03, 2019 8:18 pm
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

When error is made by the GUI, FC0.18 crashes. https://github.com/fandaL/beso/issues/5 A bit annoying is that CalculiX opens everytime in foreground. https://github.com/fandaL/beso/issues/6 It should work with updated code. somehow I can no longer use my keyboard in FreeCAD after BESO is finished. ...
by fandaL
Mon Sep 30, 2019 9:19 pm
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

That means I need a model with at least two materials but if I try to add a different material to a surface, CalculiX shows me this error "it is not possible to have different reference shape types for material objects at the moment". I’m not sure if it is intended workbenchworkflow but dirty way c...
by fandaL
Mon Sep 30, 2019 11:07 am
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

CalculiX uses all CPU threads (not whole time it is running). BESO inside does not use more threads. Second note is that if you would run larger and larger tasks you would notice that CalculiX takes smaller and smaller portion of the optimization time. This is due to data structure which gets rapidl...
by fandaL
Tue Sep 24, 2019 8:44 pm
Forum: FEM
Topic: Topology optimization
Replies: 83
Views: 22878

Re: Topology optimization

Good news: Initial version of GUI for FreeCAD is available with old-new example https://github.com/fandaL/beso/wiki/Example-4:-GUI-in-FreeCAD It should work with the FC0.19 and FC0.18 (python 3). When error is made by the GUI, FC0.18 crashes. https://github.com/fandaL/beso/issues/5 A bit annoying is...
by fandaL
Mon Aug 19, 2019 12:09 pm
Forum: FEM
Topic: Error in reading results file from eigenvalue frequency analysis with solid elements
Replies: 5
Views: 462

Re: Error in reading results file from eigenvalue frequency analysis with solid elements

I don’t know how FreeCAD gets error message from Calculix, but if I rerun your file, there is no "error" explicitly printed in the ccx output. True is that ccx terminated without results. But this is caused by *MPC card, i.e. FemConstraintPlaneRotation. If you delete it, Calculix will make job done.
by fandaL
Thu Aug 15, 2019 11:52 am
Forum: FEM
Topic: FreeCAD CalculiX Fails to write .frd file
Replies: 4
Views: 312

Re: FreeCAD CalculiX Fails to write .frd file

A follow up question: is it possible to load a .frd file created externally into FreeCAD for post processing? Yes, it should work in the same way as if it is loaded automatically. Just drag and drop .frd file. Error message looks similar to this thread https://forum.freecadweb.org/viewtopic.php?f=1...

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