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by EkaitzEsteban
Mon Dec 24, 2018 11:59 am
Forum: FEM
Topic: Display principal stresses
Replies: 39
Views: 3626

Re: Display principal stresses

To sum up, are sxz and syz components exchanged? I think you are right that components are written in a different order. I don't exactly recall where it was discussed, if somewhere on this forum or on the ccx mailing list. Response from cxx mailing group https://groups.yahoo.com/neo/groups/calculix...
by EkaitzEsteban
Sat Dec 22, 2018 10:03 pm
Forum: FEM
Topic: Principal Stress Plots
Replies: 37
Views: 2535

Re: Principal Stress Plots

Thanks @EkaitzEsteban. I calculate eigenvectors in src/Mod/Fem/feminout/importToolsFem.py and export them to VTK in src/Mod/Fem/App/FemVTKTools.cpp so that they are available in ParaView for plotting. The white arrows are indeed the maximum principal stress vectors and the colors the von Mises stre...
by EkaitzEsteban
Sat Dec 22, 2018 9:37 pm
Forum: FEM
Topic: Display principal stresses
Replies: 39
Views: 3626

Re: Display principal stresses

fandaL wrote:
Sat Dec 22, 2018 9:27 pm
EkaitzEsteban wrote:
Sat Dec 22, 2018 8:56 am
To sum up, are sxz and syz components exchanged?
I think you are right that components are written in a different order.
I don't exactly recall where it was discussed, if somewhere on this forum or on the ccx mailing list.
Thank you FandaL!
by EkaitzEsteban
Sat Dec 22, 2018 8:56 am
Forum: FEM
Topic: Display principal stresses
Replies: 39
Views: 3626

Re: Display principal stresses

Hello, I have a doubt regarding the stresses and their posterior calculation like principal stresses.... Taking a row vector from calculix .frd and .dat files... Are the indexes of stress values sorted in the same manner? I check that in the .dat file the stress for each element integration point is...
by EkaitzEsteban
Sat Dec 22, 2018 8:28 am
Forum: FEM
Topic: Principal Stress Plots
Replies: 37
Views: 2535

Re: Principal Stress Plots

Thomas, all the credit goes to FreeCAD, Calculix and Paraview !! An amazing trio :D Hi Harry! Awesome work! I also use the same trio and I like your perforated plate example from here https://forum.freecadweb.org/viewtopic.php?f=18&t=29381&start=10#p240856 How do you get it? I guess that, the "stre...
by EkaitzEsteban
Sat Dec 22, 2018 6:12 am
Forum: FEM
Topic: [Solved] - Error in frequency analysis (Calculix has its limitations)
Replies: 18
Views: 930

Re: [Help] - Error in frequency analysis

bernd wrote:
Thu Dec 20, 2018 4:48 pm
git commit f77c605
Thank you bernd, +1
by EkaitzEsteban
Sat Dec 22, 2018 6:11 am
Forum: FEM
Topic: [Solved] - Error in frequency analysis (Calculix has its limitations)
Replies: 18
Views: 930

Re: [Help] - Error in frequency analysis

In short: Try to calculate less frequencies, or use 2nd order elements / finer mesh. In more details: I looked at the last example only (with C3D4 elements). This example works for me (ccx packed with Calculix Launcher) for up to 8 frequencies. When asking for 9 or more ccx gives the error *ERROR i...
by EkaitzEsteban
Fri Dec 14, 2018 5:33 pm
Forum: FEM
Topic: [Solved] - Error in frequency analysis (Calculix has its limitations)
Replies: 18
Views: 930

Re: [Help] - Error in frequency analysis

I'd be really interested in the FreeCAD file because there is nothing useful in the frd file except the mesh. Attached is the file. Have a look. Neverless FreeCAD should not have problems with the file. cube_C3D4.frd.txt It is a frequency analysis in a free-free conditions. The .dat file has inform...
by EkaitzEsteban
Fri Dec 14, 2018 5:29 pm
Forum: FEM
Topic: [Solved] - Error in frequency analysis (Calculix has its limitations)
Replies: 18
Views: 930

Re: [Help] - Error in frequency analysis

I'd be really interested in the FreeCAD file because there is nothing useful in the frd file except the mesh. Attached is the file. Have a look. Neverless FreeCAD should not have problems with the file. cube_C3D4.frd.txt Hi bernd, Thank you for your time!. Yes I send you the FreeCAD file. best rega...
by EkaitzEsteban
Tue Dec 11, 2018 3:08 pm
Forum: FEM
Topic: [Solved] - Error in frequency analysis (Calculix has its limitations)
Replies: 18
Views: 930

Re: [Help] - Error in frequency analysis

would it be possible to sent the FreeCAD file. Just clear the mesh (clear the mesh, do not delete it !) Do you get the same error if you use 3D FEM example from Start WB and use your solver adjustments ? Hello bernd, Thank you for your fast response. I send you the input file of a very simple cube....

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