Commit Graph

12 Commits

Author SHA1 Message Date
Philip Eisenlohr 48e642bb15 twin resistance evolution did not use magnitude of shear rate (dot gamma) but the signed quantity... leads to non-physical oscillations of twin resistance. 2009-10-20 12:15:37 +00:00
Philip Eisenlohr 7914f80931 stiffness calculation for structure > 3 was missing: "case(3)" --> now "case(3:)" as in all other constitutive_xyz..! 2009-10-19 14:47:52 +00:00
Philip Eisenlohr 974116808b fixed a potential memory leak for hexagonal structures. added some status output to constitutive_xx 2009-10-15 20:02:52 +00:00
Christoph Kords b09b2b17f3 convergence of state in crystallite is now tested as follows:
(state < relevant state) or (residuum < relative tolerance * state)
since the relevant value for the state variables depend on their nature and can vary by large scales (e.g. volume fraction: 1e-10, dislocation density: 1e5) it is not possible to set a unique value. instead the constitutive law has to decide what is relevant. therefore, all constitutive laws now read in parameters from the material.config that determine the values for relevantState [@luc: in dislobased law relevant State is for the moment generally set to 1e-200, so no additional parameters necessary in material.config. if you also want this feature, we can still implement it, no big deal]

- added sanity checks in constitutive_nonlocal.f90

- corrected coordinate transformation for backstress calculation in constitutive_nonlocal.f90

- corrected equations for evolution of dipole dislocation densities (athermal annihilation and formation by glide)
2009-09-18 15:37:14 +00:00
Franz Roters bb0840ecb2 constitutive_phenopowerlaw.f90: check for non-zero w0_slip
IO.f90: added respecteive error message

constitutive_phenopowerlaw.f90: first test with automatic file Id
2009-08-31 14:13:10 +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 387195e036 that was tooo quick, now it works hopefully 2009-08-13 13:32:17 +00:00
Franz Roters f400cdac5b corrected paramter check for phenopowerlaw 2009-08-13 13:27:14 +00:00
Christoph Kords 1a7eb3158b wrapped lines in order to ensure maximum number of allowed characters per line = 132 2009-08-03 06:37:37 +00:00
Philip Eisenlohr 53cff7458c polishing of constitutive output size determination in _init() 2009-07-24 15:23:45 +00:00
Philip Eisenlohr 97d8a321e0 some cosmetics... 2009-07-23 13:33:53 +00:00
Philip Eisenlohr f337847f35 quite some changes:
# non-greedy memory allocation
# generation of outputConstitutive to allow for script-based T16 extraction
# exchange of phenomenological by more general phenopowerlaw
# lattice is based on slip and twin families which can be treated as individual entities (switched on/off, separate hardening, etc.)
# nicer debugging output
# changed some error/warning codes
# plus potentially some minor additional brushes here and there
2009-07-22 16:07:19 +00:00