RVE level field variables for FE2FEAP (FEAP 8.6)

[Bruce Wayne]

Hello FEAP Users,

Is there anyway to get RVE level field variables(stresses and strains) as output while doing FE2 analysis.?

I am trying to generate stresses for a number of different strains on an RVE.

Using HILL option and PERIodic file input ,I think the current strain acts on previous strain's deformed state.

Thanks

[JStorm]

Do you perform real FE2 simulations or are you just interested in the results of your RVE for some macro strains?

[Bruce Wayne]

I am interested in results of RVE for some macro strains.

[Prof. R.L. Taylor]

There is really nothing currently in the program.  A start was made using the command 'RVE,,n_pt' but never used or finished.  You can look at the routine pfe2rve.f in the fe2 directory.  Possibly you can modify to suit your needs.

[JStorm]

Isn't it possible to perform a single scale simulation, i.e. micro scale FEM model via PERIodic,HILL?
FE2 is not involved in such a pure RVE simulation and the standard result output, e.g. via DISP,ALL, STRE,ALL, PVIE,TIME etc., can be used.

[Prof. S. Govindjee]

The tricky part of this would be if you are interested to visualize the micro state corresponding to a macro state that was arrived at via an inelastic process.  One would have to save the macro strain time history of the particular Gauss points of interest, then feed those into a regular FEAP computations on a mesh with periodic BCs.  This is certainly doable, but also will take a small amount of effort.