FEAP User Forum
FEAP => Input File Issues => Topic started by: Lukas_Poggenpohl on May 12, 2020, 06:12:11 AM
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Dear FEAP Forum,
I am currently trying to load an RVE with different deformations, sequentially. (E.g. first tension- then shear load as specified in the example attatched)
I am facing the problem, that the geometry is not loaded using PERIodic CAUChy. If I specify BCs via CDIS (Instead of PERIodic CAUChy), it works.
According to the O-File, load sets 1 and 2 are generated but the geometry is not loaded. (Warning for zero RHS.)
The example Input and Output files are attatched, I am using FEAP 8.4.
Thanks for the help and stay healthy,
Lukas Poggenpohl
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You have ELINK before the END of mesh command. Thus, no linking is performed. THe ver8.4 is known to have problems with load groups so it may not work, I am not sure you can load two periodic cauchy definitons, check which one is used -- probably the last one.
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Dear Prof. Taylor,
the ELINk does work now. Thank you for the fast response.
As you expected, only the last CAUCHY is used (for both PROP commands). I now tried FEAP 8.5 which shows the same issue.
Is there a possibility, to circumvent/solve this problem?
Kind regards,
Lukas Poggenpohl
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It could be done. It would require tracking where the arrays are used, adding a loop around them for the number that are defined and accumulating the result. I am not sure how many changes are required -- it is something we would possibly do in a future release as it involves changes in multiple modules.
You can do by starting with the inputs which will be done in 'pmesh.f' in ./program directory and follow all the uses of the arrays. I suppose it would be necessaary to limit to a few arrays as my memory is that none are allocated.
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Dear Prof. Govindjee,
Thanks for your reply
I enclose 3 pictures showing nodes needed to be linked and an input file in which I used commands: LINK and PERIODIC. Could you please let me know whether I exactly followed your instructions?
Thank you so much
Sincerely yours,
Nam Do