Commit Graph

27 Commits

Author SHA1 Message Date
Christoph Kords ada92a9b74 added a new module called numerics.f90 which reads in all numerical "parameters" from the file numerics.config (also being added). From now on this file has to be located in the working directory of the FEM-model and has to contain all necessary parameters. 2009-06-15 13:11:21 +00:00
Christoph Kords 3196049496 in crystallite_stressAndItsTangent we now update the state first (explicit integration) and then integrate the stress (implicit integration)
also inside the stress integration, it is now possible to define the frequency of the Jacobian update oin the LpLoop through iJacoLpResiduum. The frequency of the Jacobian update for  the stiffness in the crystallite loop is controlled by the parameter iJacoStiffness. 

also updated the corresponding stuctograms in the documentation
2009-06-09 11:05:29 +00:00
Christoph Kords ab57a40bab restructured stress integration. Double loop for stress integration (Lp and stress) with cutback step in IntegrateStress is replaced by single loop for Lp without cutback. loop counter and limits are accordingly renamed and implemented 2009-05-28 16:38:40 +00:00
Philip Eisenlohr 4f705f524f major restructuring of code.
homogenization as well as constitutive are now free to choose. the runtime got somewhat longer (25% on simple tests) compared to a hardcoded isostrain homogenization. this might be a point of further optimization at a later stage...

please use homogenization_isostrain.f90 as starting point / example for future developments of homog-schemes.

the homogenization scheme now can additionally output certain results. hence, the userdata structure at each integration point now looks like this:
- sizeHomogPostResults
- block of that size containing homogPostResults
then for each grain:
- sizeGrainPostResults
- block of that size containing crystallitePostResults, which consist of:
+ phaseID
+ volFrac
+ Eulers (3)
+ any constitutive post results requested
2009-05-07 16:27:36 +00:00
Franz Roters 51cc6714d0 changed pLongInt to 8 2009-03-31 09:07:30 +00:00
Franz Roters a5a2fdb306 introduced pLongInt for Long Integers 2009-03-31 08:51:14 +00:00
Philip Eisenlohr 9351508ae1 overhaul to allow for multiphase/homogenization setup. 2009-03-04 11:48:54 +00:00
Philip Eisenlohr cdb2dd8808 crystallite:
added full check whether residuum in inner loop is NaN
SingleCrystallite now takes/stores Lp guess

CPFEM_Taylor (missing in GIA!!):
former fully plastic guess for Lp has been exchanged by keeping the last converged Lp (global array CPFEM_Lp) to serve as new best guess for the next time step. This speeds up the inner loop of TimeIntegration.
2008-04-16 17:00:28 +00:00
Denny Tjahjanto 9d2ce61698 A revision for CPFEM_Taylor.f90. 2008-04-10 11:22:17 +00:00
Denny Tjahjanto 12dfbaf6b4 # separated CPFEM_Crystallite from CPFEM. Now in separate module crystallite.f90 as "SingleCrystallite"
# improved SingleCrystallite to advance by true cutbacking (instead of improving guess and integrating always from t_0)
# module "crystal" renamed to "lattice" together with its prefix for variables
# extension of "computationMode" to deal with cutbacks (CPFEM_general).
# cutback and new inc detection for MARC is based on common block variable cptim (and inc), not incsub anymore!
# generalized GrainInterAction as new homogenization scheme

# two symbolic links are required: constitutive.f90 and CPFEM.f90
2008-04-07 14:54:29 +00:00
Philip Eisenlohr 5641cfd477 changed precision assignment to intrinsic (and standardized)
"selected_*_kind"
2008-03-07 15:21:46 +00:00
Philip Eisenlohr c74e071f5e updated constitutive_xxx to reflect new 9x9 dLp_dTstar - used to be 3x3x3x3 2008-02-21 12:50:37 +00:00
Philip Eisenlohr 9707fd0f8f full update, i.e. my development snapshot 2008-02-19 12:58:46 +00:00
Philip Eisenlohr 2b567ad20d CPFEM
changed consistent tangent scheme to D.Tjahjanto Diss version
fixed nasty bug in decision when to calculate new values (CPFEM_general)

prec
precision values should now be on safe side.
2008-02-18 18:11:24 +00:00
Denny Tjahjanto 199c65cdba changed pert_e to new perturbation value pert_Fg 2008-02-18 10:46:18 +00:00
Philip Eisenlohr a41a4a75ef CPFEM:
time integration scheme changed to start from guessing of Lp.
Newton-Raphson algorithm now accelerates as long as residuum improves.

IO:
added error 650 for polar decomposition problems

prec:
some cleanup. Introduced "relevantStrain" for convergence checking in CPFEM
2008-02-15 10:04:49 +00:00
Luc Hantcherli b8b171c95b Introduce debug module, contains distributions of nCutback, nStressLoop, and nStateLoop 2008-01-10 18:53:57 +00:00
Luc Hantcherli fe70a82d6d !!!!! IMPORTANT !!!!!
All subroutines were committed at once:
- constitutive_pheno works
- constitutive_dislo without twinning also works

This release should serve as reference
2007-12-14 13:36:04 +00:00
Philip Eisenlohr ad3ccf22c2 clarified tolerances in prec (abs vs rel)
all units conform to SI now !! (especially MPa --> Pa)

CONSEQUENCE: mattex files need to respect SI
2007-11-15 11:21:37 +00:00
Franz Roters 85df3b95ee changed restriction of dTstar, its now based on the residuum, if it does not improve 0.5*dTstar is used instead 2007-08-07 08:02:31 +00:00
Franz Roters a5f49a0578 changed first elastic guess for small Tstar
changed residuum to only consider deviatoric part of Tstar
changed scaling when dTstar becomes too large to proportionally scaling all components of dTstar
2007-07-20 13:32:44 +00:00
Franz Roters a1c3df84ab changed quite a few things, mainly using last result as initial guess now, thinks work a lot better now but still not perfect 2007-06-06 14:38:06 +00:00
Philip Eisenlohr 9da4b4cf24 name change to reflect State and Stress (was outer,inner)
added nReg for Jacobi regularization attempts
2007-04-11 10:05:08 +00:00
Philip Eisenlohr 35266bd513 added nreg to limit number of Jacobi regularizations 2007-04-10 11:22:06 +00:00
Franz Roters 4e68da3cf1 moved all numerical parameters to prec.f90
removed some unused variables
2007-03-29 07:15:12 +00:00
Philip Eisenlohr 4554df8625 pInz --> pInt 2007-03-20 15:58:53 +00:00
Philip Eisenlohr 80facb8b30 let's see whether this is the thing to do..!?!? 2007-03-20 13:55:22 +00:00