Periodic boundary condition type:ERROR

[Bruce Wayne]

Hello FEAP Users,

I am trying to run the input file given in FEAP Wiki : http://feap.berkeley.edu/wiki/index.php?title=Hill-Mandel in Feappv 5.1 and this error is occuring at the end of the outputfile:"Periodic boundary condition type:ERROR" and no other files or plots are produced.

I have tried some other RVE related input files but still getting the same error.

What is happening here? Can somebody help me out.

Thanks in advance and I hope you are safe and healthy.


Regards,
Bruce

[Prof. R.L. Taylor]

Feappv does not support this option, only in feap

[Prof. S. Govindjee]

I think in the most recent release of FEAPpv there is a HILL option but it make not work with all the boundary conditions found in FEAP.  I'll have a look and get back to you.

[Bruce Wayne]

Dear Prof.Taylor and Prof.Govindjee,

Thank you very much for your replies.

I would be very grateful if you could give the options and boundary conditions for fe2 available in feappv.

Thanks in advance.

Regards,
Bruce

[Prof. R.L. Taylor]

The only boundary condition supported is all boundary dofs restrained, there is no LINK available.

[Bruce Wayne]

Dear Professors,

I tried running the file(given in Hill-Mandel Wiki) using feap executable in main and also fe2 in feap version 8.6 this time and still this same error is occuring and no plots are produced.

Thanks.

[Prof. R.L. Taylor]

OK, will check.  Make sure the commands are correct for version 8.6 -- they changed for specifying PERIodic.

[Prof. R.L. Taylor]

If you check your output file "Oxxxxxxx" named file, you will observe it does not read the periodic data. 

The feap user manual describes the changes necessary to read the data correctly.  There is a "bug" that the input of the "mech" option is not written to the output file, but it does seem to run correctly with proper input.

 periodic hill
  file loading.txt            ! File with eps_avg(t)
  mechanical

[Bruce Wayne]

Thank you very much Professor.
It is working now!