Principal Stress Plots
Moderator: bernd
Forum rules
and Helpful information for the FEM forum
and Helpful information for the FEM forum
Principal Stress Plots
As a step towards plotting stress trajectories (see https://forum.freecadweb.org/viewtopic. ... 85#p237229) I managed to export principal stress directions to Paraview VTK. Here the example of a block under pure shear conditions:
-
-
As can be seen from the Paraview plot, the principal stress directions (+/- 45 degrees) and values (+/- 1000MPa) agree with the applied shear stresses.
To be continued...
-
-
As can be seen from the Paraview plot, the principal stress directions (+/- 45 degrees) and values (+/- 1000MPa) agree with the applied shear stresses.
To be continued...
Re: Principal Stress Plots
... and here the results for a cantilever beam
-
-
Re: Principal Stress Plots
... and a knee joint:
-
-
-
To be continued ...
-
-
-
To be continued ...
Re: Principal Stress Plots
Are you trying to implement the results also in FC or just the calculation method?
Re: Principal Stress Plots
Hi @Jee-Bee. Paraview is a very strong and versatile tool and the link with FC is quite simple. So I am not sure that trying to replicate and maintain Paraview capability inside FreeCAD is the best use of our time. What is your view?
Re: Principal Stress Plots
I don't have used it. so i don't know what the possebilities are and or how it's working
Re: Principal Stress Plots
Ah ok. It's well worth a try. Simply export a VTK file from the result object. Paraview is very easy to use. I didn't read any manuals or guides - just Googled a bit and watched some videos
-
- Veteran
- Posts: 3156
- Joined: Sat May 20, 2017 12:06 pm
- Location: Germany
Re: Principal Stress Plots
Harry, amazing work.
My wish is to see your plots in FC-pipeline results.
"Paraview is very easy to use"
Re: Principal Stress Plots
I will give it a try when I find the time Thomas. It is difficult to choose standard settings though. It takes quite a bit of playing with scale factors, colors, line thicknesses, etc. to get an acceptable result. That flexibility is available to the user in Paraview, but not in the FC VTK pipeline. So I fear that the plots will look clunky, driving people towards Paraview anyway.
Priorities for me at the moment are as follows:
1) leave this and the concrete reinforcement ratios in an orderly state on github, so people can compile and test it
2) try to finish my routine for stress trajectories. I am quite excited about it, because I believe FC would be the first post-processor to have this functionality
3) finish my own 3D elastoplastic collapse solver. This will read regular INP and produce regular FRD) so can simply be called as alternative to CCX
Just too many ideas and too few hours in a day
Re: Principal Stress Plots
A concrete wall 4.00x2.00x0.15m on 0.50x2.00x0.15m columns, loaded by self weight and 1MN distributed load on top ...
-
Red = Major Principal Stress
Blue = Minor Principal Stress
Green = Intermediate Principal Stress
-
Red = Major Principal Stress
Blue = Minor Principal Stress
Green = Intermediate Principal Stress