Commit Graph

18 Commits

Author SHA1 Message Date
Denny Tjahjanto 40b1478dac the latest RGC model + corrections for "element homogeneous" feature 2010-03-24 13:20:12 +00:00
Claudio Zambaldi 7526a24a1b now with functionality to output a "JOB.outputHomogenization". This contains size descriptions of all requested output variables to be parsed by a further script to generate meaningful names for user defined vars... (watch out!) 2010-02-19 18:03:16 +00:00
Denny Tjahjanto 043356e8a9 homogenization_RGC.f90 >> just switching-off one of the debugging statement.
crystallite.f90 >> optimizing the perturbation algorithm for local tangent.
2009-12-22 12:28:02 +00:00
Denny Tjahjanto 3ab5cdc770 Additional feature to the RGC scheme: The volumetric consistency constraint. This is implemented by penalizing any volumetric discrepancy which occurs due to severe relaxation. The penalty for volume inconsistency is described using a power-law model. The setting for this function can be done in the numerics.config via three new parameters, i.e., maxvoldiscrepancy_RGC, voldiscrepancymod_RGC and discrepancypower_RGC. For monintoring, an extra output variable in prescribed in the material.config in the RGC section, namely "(output) volumediscrepancy".
IO.f90 and numerics.f90 has been modified accordingly to accommodate these changes
2009-12-16 16:20:53 +00:00
Denny Tjahjanto 59d22d47b2 introduction of a possibility to have homogeneous element (all ips in one element are identical, sort of reduced integration)
and bugs-fixing in crystallite.f90, homogenization_RGC.f90, numerics.f90.
2009-11-24 15:00:25 +00:00
Denny Tjahjanto 6702cb3baa Introduction of a numerical viscosity into the RGC scheme to improve the convergent behavior and the numerical stability of the scheme (see: homogenization_RGC.f90). These changes have been incorporated in all related subroutines (homogenization.f90, IO.f90, numerics.config and numerics.f90). 2009-11-17 13:42:38 +00:00
Denny Tjahjanto f50d3291f9 sorry, back to the previous version. grain deformation output is part of crystallite.f90, no longer done by homogenization. material.config reflects the changes. 2009-10-22 16:59:24 +00:00
Denny Tjahjanto d344aaf3a0 added possibility to output individual grain deformation gradient in homogenization_RGC.f90 and the homogenization.f90 has been modified accordingly. see material.config for the key-words to output the individual grain deformation gradient in the homogenization block. 2009-10-22 09:24:05 +00:00
Philip Eisenlohr 21cad32137 # new interface for Abaqus
# IO has some additional functionality for Abaqus parsing
# ping pong scheme in FE interface now similar (and more human understandable) in both versions
# mesh has better splitting of different tasks, plus operation on database whenever possible
# FEsolver as new global var to indicate FEM solver type
# computation mode reshuffling: 6 is now Marc special case of recycling...
2009-10-12 16:01:49 +00:00
Denny Tjahjanto ec524a1dd2 homogenization_RGC.f90
>> Fixing problems related to the size of homogenization_RGC_state vector.
2009-09-07 15:28:32 +00:00
Denny Tjahjanto 5f7e5b8409 homogenization_RGC.f90
<< correction for a very stupid mistake. replacing stress P with the absolute value of stress abs(P) during convergence check. it should work upon deep-drawing.
2009-09-03 20:26:20 +00:00
Franz Roters 2029b23f98 added version information to all files
do NOT edit text like this:
$Id: constitutive_phenopowerlaw.f90 406 2009-08-31 14:13:10Z MPIE\f.roters $
2009-08-31 15:09:15 +00:00
Denny Tjahjanto b25396374a homogenization_RGC.f90 >>> adding some lines, mostly for debugging purpose. no critical change.
constitutive_phenopowerlaw.f90 >>> adding new parameter: constitutive_phenopowerlaw_w0_slip, i.e., the hardening rate exponent.
homogenization.f90 >>> most important change is to add an if-else statement (line 379-380) to switch crystallite_requeted = .false. for already converged material point iteration (el/ip). the rest of the changes are cosmetics and debugging stuffs.
crystallite.f90 >>> similar to homogenization.f90, the most important change is to add additional if-else statement (line 574) in the jacobian (perturbation) loop. now the jacobian calculation will only be performed when crystallite_requested = .true.. the rest is only cosmetic.
2009-08-27 12:10:06 +00:00
Franz Roters 0ef4ec27b3 there was a lonesome endif that needed a comment 2009-08-13 12:56:07 +00:00
Denny Tjahjanto 86211bf0ce homogenization_RGC.f90: adding comments to improve clarity 2009-08-12 14:13:20 +00:00
Christoph Kords 8ed3ddc03b now with first draft of nonlocal constitutive law
debugging memory leak closed
debugging counters corrected

center of gravity stored in mesh

state updated is now split into a collecting loop and an execution

updateState and updateTemperature fill sequentially separate logicals and evaluate afterwards to converged

added 3x3 transposition function, norm for 3x1 matrix and 33x3 matrix multiplication in math

non-converged crystallite triggers materialpoint cutback (used to respond elastically)

non-converged materialpoint raises terminal illness which in turn renders whole FE increment useless by means of odd stress/stiffness and thus waits for FE cutback
2009-08-11 16:31:57 +00:00
Denny Tjahjanto 4689966c79 correction in homogenization_RGC.f90: in the use of material module
homogenization_typeInstance was included two times in previous version.
2009-08-06 12:47:14 +00:00
Denny Tjahjanto 360fb069ba List of changes/modifications:
* IO.f90 :: Adding error messages for RGC homogenization
* crystallite.f90 :: Modifying convergent criteria in crystalline_updateState and crystalline_updateTemperature
* material.f90 :: Adding IO_lc in homogenization_type(Name)
* debug.f90 :: Adding debbugging statement and counter for material point loop
* homogenization.f90 :: Adding homogenization_RGC blocks
* homogenization_isostrain.f90 :: Modifying argument of homogenization_isostrain_stateInit
* mpie_cpfem_marc.f90 :: Adding homogenization_RGC include
* numerics.f90 :: Adding numerical parameters for RGC scheme
* math.f90 :: Changing function name: math_permut to math_civita
2009-07-31 12:02:20 +00:00