I am trying to make a sand model, which captures liquefaction / post-liquefaction recovery around a structure. We have the laboratory results and measurements, but to use them a model stable at large strain is necessary.
I'm thinking of looking at green-strains, but I've never used them before and the complexity at hand is somewhat overwhelming.
Perhaps you have some Matlab (or other code) examples of some finite elements which are more stable than CST or 8 node rectangle?
Trial and error, starting from scratch, can be rather frustrating. Learning from your real life experience in dealing with large strain in FEM models would be most helpful.
Hi
I have never worked on liquefaction but I remember reading about it.
It seems that you can analyze liquefaction using Code Aster (CA), which has a freeware version and executes in Python, i.e. you are quite free to do what you want during execution.
http://code-aster.org/doc/v12/en/man_r/r7/r7.01.23.pdf
http://paginas.fe.up.pt/~eurodyn2014/CD/papers/093_MS02_ABS_1651.pdf
Perhaps it is worth to take a look?
You can download CA here
http://web-code-aster.org/V2/spip.php?article303
and the user community is quite active and helpful so it is worth to register there. Also, you can use CA here https://www.simscale.com/
or download a ready to use runtime DVD from CAELinux
http://caelinux.com/CMS/
Have fun
Claes
Good call, Claes. Our test results are approximately one step ahead of the constitutive law of HUJEUX (we want to include post-liquefaction re-stabilisation, to capture the "healing" process of disturbed soil structure). Very close call. And a solid looking solver.
Once we get the preliminary models going, some commercial grade platform will be necessary indeed. And I was not familiar with Code_Aster, we all got plaxis license here, so people are trying to squeeze the juice out of that one, primarily. That and Matlab.
But plaxis is not accessible on my home computer as. I'm running linux. Given the apparent flexibility and active community Code_Aster looks very appealing. Will be my first option on the list, when the time comes.
Hi Tomas
It is better than this. CA is open source, so if you want, you can open the HUJEUX file and tweak it to your heart's content. Better still, why not get in bed with the CA people and join forces to avoid solving the puzzle twice. You bark up the same technology tree but aim at different applications as far as I can tell.
Last, if you wish to follow updates, try simscale or install linux and run the Salome Meca distribution.
/C
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