PrePoMax & CalculiX - Edit CalculiX Keywords: Plasticity

A tutorial for how to use CalculiX keyword editor to add *PLASTICITY keyword (currently unsupported by the GUI in the PrePoMax pre and post-processor) to CalculiX analysis.
PrePoMax can import solid *.unv meshes created by Salome open-source platform, prepare the finite-element model and run the simulation using CalculiX finite-element solver. The results can be post-processed in PrePoMax package.
Download link and installation instructions for PrePoMax: lace.fs.uni-mb....
Notes:
1) From the PrePoMax version v0.5.0 the number of processes in the analysis is set in Tools - Settings - CalculiX.
2) From the PrePoMax version v0.4.7 the keyword editing isn't required any more, as the material editor now supports *PLASTIC keyword.

[@4pingenieria81]

The new CCX keyword editor is just awesome... it create a clear tree structure in realtime! Very very good feature and program.

[@user-vv1pj5gv7q]

Спасибо

[@syont]

some regulation recommended to limit the plastic strain about 4% at ultimate loads, looking the documentation itself is linearized not based on peak values. hope this missing feature will be available in the next future release. thx u

[@MatejBorovinsek]

This is a little bit trickier to do in CalculiX since the results file .frd only contains averaged extrapolated nodal values. At the moment a history output (using S) can be created for stresses for selected element-sets but then the results contain stress values in integration points without extrapolation (if the mesh is good enough in the important region the extrapolation and averaging do not affect the result).

[@syont]

​@@MatejBorovinsek sorry, may i did not ask clearly. it's not about averaging and extrapolated nodes were are common in FE. i mean linearized along failure lines by curve fitting a straight line using the method of least squares. using Paraview it can be access trough PlotOverLine and PlotChartView.

[@MatejBorovinsek]

@@syont Ok, I understand now. This feature is on the to-do list but will probably miss the next version.

[@syont]

@@MatejBorovinsek many thanks for interested in, not really a problems even it's out of the first five next plan priority.

[@veng.8526]

That is a very very useful program! Thank you for that!
Is it possible to set the increments? So that I can set each increment +0,1mm or can I do this only with the step function?

[@MatejBorovinsek]

At the moment you can do that only using multiple steps if you have a linear analysis. If you have a non-linear analysis you can set up the step incrementation inside a single step.
The alternative is probably the amplitude feature, which is not jet supported.

[@adilcharhia9577]

how can we get the CalculiX Keywords file?

[@MatejBorovinsek]

You can use File -> Export.