I have made improvements to the plastic material models, better convergence and results.
Added hencky_stvenant_kirchhoff bi-linear plastic model for large strains, improved bi-linear model for small strains.
Added an orthotopic model, not plasticity, but E can be specified in each direction.
Put all of the models into one MatLIb, description file
Library F90
I did
elmerf90 myUMATLib.f90 -o myUMATLib
then copied myUMATLib to /usr/lib/elmersolver to make it available from any directory, you can also put it in the current directory.
the red and yellow curves overlay.Improvement to plastic material models
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Improvement to plastic material models
Last edited by kevinarden on 26 Dec 2019, 13:13, edited 3 times in total.
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Re: Improvement to plastic material models
Example sif files
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Re: Improvement to plastic material models
Further testing lead to improvements in bi-linear and bi-linear hencky_stvenant_kirchhoff
- Attachments
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- materialLIBS.txt
- (976 Bytes) Downloaded 256 times
Re: Improvement to plastic material models
Dear Kevinarden ,
I just noticed that the hskbi.sif file uses the subroutine "bilinear" instead of "hsk_bi " in the myUMATLib.F90 file.
Yours Sincerely,
Anil Kunwar
Anil Kunwar
Faculty of Mechanical Engineering, Silesian University of Technology, Gliwice
Faculty of Mechanical Engineering, Silesian University of Technology, Gliwice
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Re: Improvement to plastic material models
Thanks I will check it