Christoph Kords
bd754dbefd
corrected debug output of evolution rates; added possibility to change the safety factor for the CFL flux condition via the material.config file; updated the example material.config due to recent changes in nonlocal constitutive
2012-08-16 09:13:38 +00:00
Christoph Kords
f5e7d576f1
introduced annihilation of screw dipoles; so far no thermal activation, but immediate annihilation; each annihilated screw dipole leaves behind an edge jog of same length as the dipole height on the collinear system
2012-08-14 12:26:20 +00:00
Christoph Kords
a48d180f8c
allow prefactor for self-diffusion to be equal to zero
2012-08-06 09:03:33 +00:00
Christoph Kords
e8df3678aa
added possibility to assign the transmissivity of grain boundaries a fixed value by use of the keyword "grainboundaryTransmissivity" in the material.config; grain boundaries are identified as interfaces between areas of different material_texture
2012-08-03 14:32:49 +00:00
Christoph Kords
15c5131874
corrected formulation of maximum height of screw dislocation dipoles
2012-07-24 14:50:11 +00:00
Christoph Kords
c4c00f04f4
no dipole formation by stress decrease;
...
dipole dissociation rate proportional to "deltaDipoleLimit / oldDipoleLimit", not "deltaDipoleLimit / newDipoleLimit"
2012-07-24 06:57:37 +00:00
Philip Eisenlohr
7c6fc121fd
condensed error reporting for constitutive_XYZ_init
...
removed erroneous check for structure>3
2012-07-17 17:36:24 +00:00
Philip Eisenlohr
4d09ef0648
changed variable name "debug_what" to "debug_level"
2012-07-05 09:54:50 +00:00
Christoph Kords
145d971d7e
added some debug output
2012-05-30 08:05:36 +00:00
Christoph Kords
5cc73a15a9
small correction in debug output
2012-05-30 07:41:22 +00:00
Christoph Kords
20f203f799
allow minimum stable dipole height equal to zero; ensure that maximum stable dipole height is not smaller than the minimum value
2012-05-20 13:57:35 +00:00
Christoph Kords
5b02d4e8eb
dipole dissociation and formation by change in stress as new mechanism in deltaState; had to add dipole height to state variables, which is however updated by deltaState instead of microstructure; alternatively microstructure had to know the current stress state
2012-05-18 14:35:52 +00:00
Christoph Kords
4da6907648
moved remobilization of dead dislocations from dotState to deltaState
2012-05-18 13:35:44 +00:00
Christoph Kords
a5c1624648
check for invalid mesh type once in constitutive_init and not every time constitutive_nonlocal_dotState is called
2012-05-18 13:15:23 +00:00
Christoph Kords
f6d5efeed3
removed arguments Fe and Fp from collectDeltaState function call
2012-05-17 11:04:22 +00:00
Christoph Kords
a54439e3b5
dotState does not have to be reset to zero. this is a remnant from older versions when the dotState for the nonlocal model used to be updated by the neighboring integration point
2012-05-16 15:35:14 +00:00
Christoph Kords
84d4652a07
all constitutive modules now contain a new function "deltaState", which in the future allows to have an instantaneous and incremental change of the state (additional to the rate based evolution with dotState).
2012-05-16 14:43:26 +00:00
Franz Roters
eb8265b914
fixed potential division by zero error discovered by our American friends
2012-05-08 07:16:00 +00:00
Christoph Kords
5263366615
adding switch in material.config for short range stress correction
2012-03-15 14:58:12 +00:00
Christoph Kords
7330031579
corrected special treatment of periodic images in calculation of stress correction
2012-03-15 10:08:08 +00:00
Franz Roters
70a44fbbdd
constitutive models need to skip new keyword elasticity when reading their arameters
2012-03-15 09:22:24 +00:00
Christoph Kords
9cbbb7cab5
Dead dislocations are treated the same as mobile dislocations for the flux part though they do not contribute to slip. By that the pileup of dead dislocations is able to diminish with time (kinetics are the same as for the glide part; this is not correct but gives valuable results). Also remobilization of dead dislocations at neighbor is taken into account for flux.
2012-03-14 15:32:50 +00:00
Christoph Kords
6bca2150f2
local stress correction of gradient in dead dislocations and neighboring excess density is additive
2012-03-14 15:24:19 +00:00
Christoph Kords
06c93435f2
viscosity term in kinetics law proportional to resolvedstress minus forest term
2012-03-14 15:18:36 +00:00
Christoph Kords
d2652cae47
multiplication only controlled by screws
2012-03-13 14:19:36 +00:00
Franz Roters
c9ed989dad
replaced keyword constitution with plasticity in preparation of upcomming generalized elasticity
2012-03-12 14:09:37 +00:00
Martin Diehl
bd9667bd4b
added new, flexible debugging scheme.
...
now all modules have their own debug specification.
compiles and runs, I hope nothing is broken
did a lot of polishing
2012-03-08 20:25:28 +00:00
Martin Diehl
478a6d110c
mixed things up, did not want to commit constitutive_nonlocal.f90 but rather DAMASK_spectral.f90!!!!
...
did a lot of polishing on constitutive_nonlocal.f90 (mostly checked in at last commit), for changes on DAMASK_spectral.f90 see previous message
2012-02-23 17:20:57 +00:00
Martin Diehl
a98832100f
introduced itmin parameter for spectral code for defining minimum number of cycles
...
removed simplified_algorthim flag because the basic scheme using the polarization field will not be implemented
introduced divergence_correction flag for making divergence criterion resolution-independent (still experimental and not set by default)
corrected output and restart frequency (now modulo on incs of current load case)
2012-02-23 16:43:17 +00:00
Christoph Kords
9bf5b9dc86
dotState=NaN enforces cutback, if evolution rates lead to negative densities
2012-02-22 16:08:22 +00:00
Christoph Kords
97b2240fe9
take absolute dislocation velocities when testing Courant-Friedrichs-Lewy condition
2012-02-21 13:11:47 +00:00
Nan Jia
db06c797cd
store number of outputs for each instance of the constitution in constitutive_[j2/titanmod/...]_Nouput and use this value to loop over all valid outputs when determining the size of the outputs array
2012-02-14 15:19:59 +00:00
Christoph Kords
30c55c3142
added check for unknown keywords again (in agreement with Philip ;-)
...
indeed 'constitution' and '/nonlocal/' are the only keywords which have to be ignored, since they are parsed elsewhere
2012-02-14 09:22:37 +00:00
Philip Eisenlohr
9b73cb3c65
removed parameter check complaining about unknown keyword as default case. there are just too many keywords that do not trigger a variable assignment to cope with them (e.g. /nonlocal/, constitution, etc.)
...
I suggest to kill similar logic from other files if present somewhere...
2012-02-13 23:30:59 +00:00
Christoph Kords
c786336af3
reordered (and partly redistributed) error message identifiers, deleted those which are not in use anymore.
...
all constitutive as well numerics now raises an error, if an unknown keyword is found in the respective config file
2012-02-13 17:41:27 +00:00
Martin Diehl
156ec4582a
polishing, adding _pInt etc. where applicable
...
post_results now handels zero increment different (like FEM, it is always there even if it is not counted)
2012-02-13 14:18:07 +00:00
Christoph Kords
26b4f886ba
whoops, accidentally removed _pInt in the IO_error calls which where previously added by Martin
2012-02-10 07:58:33 +00:00
Christoph Kords
ff53b9754b
somewhat better readable format without as much linebreaks
2012-02-10 07:50:29 +00:00
Martin Diehl
7a23833a39
removed line>132 characters, added _pInt when calling IO_error
2012-02-09 17:28:55 +00:00
Christoph Kords
d62eddc0cd
corrected kinetics law and changed parameters. For solid solution hardening there are 3 parameters: the activation energy, the concentration of obstacles that determines the activation length and meanfreepath, and the obstacle size that determines the activation volume. For the Peierls mechanism there is: the width of doublekinks that determines the activation volume and the Peierls stress for edge and screw.
...
Still testing needed to check whether the current formulation makes sense or not.
2012-02-03 12:50:54 +00:00
Martin Diehl
c5128e94eb
some f2008 standard related correction i didn't check in last time
2012-02-01 20:20:05 +00:00
Martin Diehl
800e291240
made code standard conform to Fortran 2008 (ignoring warning concerning comments beyond character 132). Basically, changing "x" format specifier to "Nx" ("1x") plus removing $ format specifier
...
added compiler switches for gfortran and ifort to check for standard conformity
old gnu compilers <4.4 are not longer supported because they don't provide the c binding for fftw
2012-01-31 19:18:55 +00:00
Martin Diehl
80583fefb5
added compilation_info.f90, to store compilation date,time and compiler info in each file
...
added #include statement at each init() routine
2012-01-31 14:54:49 +00:00
Martin Diehl
eeda357710
N^2 initialization loop (former spectralPictureMode) rewritten in material.f90
...
additional output in DAMASK_spectral_interface.f90
132 character cut off in constitutive_nonlocal.f90
rounding error in math.f90 complex number initialization (1.0_pReal)*2.0_pReal*pi
new $DAMASK_NUM_THREADS warning in numerics.f90 / IO.f90
polishing in DAMASK_spectral.f90
2012-01-30 13:52:41 +00:00
Christoph Kords
1330576a01
added new math function "math_deviatoric33" which returns the deviatoric part of a 3x3 tensor
...
renamed some math functions, so that we have a universal naming scheme: for matrix multiplications use an "x" (e.g. math_mul33x3); don't use the "x" to describe the shape of the tensor that the function is applied to (e.g. math_invert33 instead of math_invert3x3)
2012-01-26 13:50:00 +00:00
Christoph Kords
df931890e0
corrected typos
2012-01-26 12:50:04 +00:00
Christoph Kords
5a658d1b82
dislocation velocity output for each dislocation type (edge+,edge-,screw+,screw-)
...
for fcc constitutive_nonlocal_kinetics is called only once and the result is used for each dislocation type, for all other lattice structures we have one call for each dislocation type
2012-01-26 07:43:36 +00:00
Christoph Kords
e5407894b5
Reworked kinetics. Now there is a universal law which can be used for both fcc and bcc (and probably even hcp). It mainly consists of an athermal forest cutting part , solid solution and peierls as thermally activated processes, and viscous glide. Therefore, lots of new parameters in the material.config. Not sure yet if the values make sense though.
...
Also renamed some of the old parameters.
Unknown constitutive output raises error.
2012-01-25 17:04:37 +00:00
Christoph Kords
8739b9522e
dislocation stress does not add to stress field anymore, but is only available as constitutive output for purposes of postprocessing. instead, we now use a backstress term (which is added to the resolved shear stress) that depends on the gradient of excess density on the same slip system.
2012-01-17 10:26:57 +00:00
Christoph Kords
860594d9a4
forgot to multiply shearrate with timestep in order to get accumulated shear
2011-11-09 10:26:00 +00:00