f153866030
introduced factor to control edge contribution to multiplication;
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dislocation density below a single dislocation per IP considered not significant
2012-09-04 16:56:37 +00:00
d80b45c1d9
added relativistic correction of velocity (maximum velocity given by parameter in material.config); probability of thermal activation in velocity law not allowed to be greater than one.
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output of creation rate for edge jogs now for own system, not collinear.
check for negative densities in dotState now uses absoluteToleranceRho instead of significantRho.
2012-08-30 07:33:13 +00:00
f3e7b3cec8
added separate output of dipole formation rate for edge and screw
2012-08-27 15:57:31 +00:00
9214da4465
added missing labels to list of available outputs
2012-08-27 12:41:57 +00:00
3cd5fa90e8
corrected dislocation multiplication term for special case of zero density
2012-08-24 11:36:46 +00:00
4f67d04c69
new parameter "significantRho" for nonlocal constitutive law ; density below this value will hardly contribute to dislocation glide or any dislocation reaction ; old parameter "absoluteToleranceRho" is now used only for its initial purpose, namely the absolute tolerance in the state integration
2012-08-23 05:48:21 +00:00
222aed9f60
derivative of velocity with respect to resolved stress was flawed; now much better convergence of stress integration for nonlocal constitutive law
2012-08-21 14:40:01 +00:00
b2aacf9ca4
rates in constitutive_results are taken directly from last converged step and not calculated again; added output of rates for annihilation of screws and deposition of edge jogs on collinear system
2012-08-16 11:03:22 +00:00
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
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
a48d180f8c
allow prefactor for self-diffusion to be equal to zero
2012-08-06 09:03:33 +00:00
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
15c5131874
corrected formulation of maximum height of screw dislocation dipoles
2012-07-24 14:50:11 +00:00
c4c00f04f4
no dipole formation by stress decrease;
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dipole dissociation rate proportional to "deltaDipoleLimit / oldDipoleLimit", not "deltaDipoleLimit / newDipoleLimit"
2012-07-24 06:57:37 +00:00
7c6fc121fd
condensed error reporting for constitutive_XYZ_init
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removed erroneous check for structure>3
2012-07-17 17:36:24 +00:00
4d09ef0648
changed variable name "debug_what" to "debug_level"
2012-07-05 09:54:50 +00:00
145d971d7e
added some debug output
2012-05-30 08:05:36 +00:00
5cc73a15a9
small correction in debug output
2012-05-30 07:41:22 +00:00
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
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
4da6907648
moved remobilization of dead dislocations from dotState to deltaState
2012-05-18 13:35:44 +00:00
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
f6d5efeed3
removed arguments Fe and Fp from collectDeltaState function call
2012-05-17 11:04:22 +00:00
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
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
eb8265b914
fixed potential division by zero error discovered by our American friends
2012-05-08 07:16:00 +00:00
5263366615
adding switch in material.config for short range stress correction
2012-03-15 14:58:12 +00:00
7330031579
corrected special treatment of periodic images in calculation of stress correction
2012-03-15 10:08:08 +00:00
70a44fbbdd
constitutive models need to skip new keyword elasticity when reading their arameters
2012-03-15 09:22:24 +00:00
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
6bca2150f2
local stress correction of gradient in dead dislocations and neighboring excess density is additive
2012-03-14 15:24:19 +00:00
06c93435f2
viscosity term in kinetics law proportional to resolvedstress minus forest term
2012-03-14 15:18:36 +00:00
d2652cae47
multiplication only controlled by screws
2012-03-13 14:19:36 +00:00
c9ed989dad
replaced keyword constitution with plasticity in preparation of upcomming generalized elasticity
2012-03-12 14:09:37 +00:00
bd9667bd4b
added new, flexible debugging scheme.
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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
478a6d110c
mixed things up, did not want to commit constitutive_nonlocal.f90 but rather DAMASK_spectral.f90!!!!
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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
a98832100f
introduced itmin parameter for spectral code for defining minimum number of cycles
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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
9bf5b9dc86
dotState=NaN enforces cutback, if evolution rates lead to negative densities
2012-02-22 16:08:22 +00:00
97b2240fe9
take absolute dislocation velocities when testing Courant-Friedrichs-Lewy condition
2012-02-21 13:11:47 +00:00
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
30c55c3142
added check for unknown keywords again (in agreement with Philip ;-)
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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
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.)
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I suggest to kill similar logic from other files if present somewhere...
2012-02-13 23:30:59 +00:00
c786336af3
reordered (and partly redistributed) error message identifiers, deleted those which are not in use anymore.
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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
156ec4582a
polishing, adding _pInt etc. where applicable
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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
26b4f886ba
whoops, accidentally removed _pInt in the IO_error calls which where previously added by Martin
2012-02-10 07:58:33 +00:00
ff53b9754b
somewhat better readable format without as much linebreaks
2012-02-10 07:50:29 +00:00
7a23833a39
removed line>132 characters, added _pInt when calling IO_error
2012-02-09 17:28:55 +00:00
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.
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Still testing needed to check whether the current formulation makes sense or not.
2012-02-03 12:50:54 +00:00
c5128e94eb
some f2008 standard related correction i didn't check in last time
2012-02-01 20:20:05 +00:00
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
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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
80583fefb5
added compilation_info.f90, to store compilation date,time and compiler info in each file
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added #include statement at each init() routine
2012-01-31 14:54:49 +00:00
eeda357710
N^2 initialization loop (former spectralPictureMode) rewritten in material.f90
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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
1330576a01
added new math function "math_deviatoric33" which returns the deviatoric part of a 3x3 tensor
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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
df931890e0
corrected typos
2012-01-26 12:50:04 +00:00
5a658d1b82
dislocation velocity output for each dislocation type (edge+,edge-,screw+,screw-)
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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
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.
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Also renamed some of the old parameters.
Unknown constitutive output raises error.
2012-01-25 17:04:37 +00:00
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
860594d9a4
forgot to multiply shearrate with timestep in order to get accumulated shear
2011-11-09 10:26:00 +00:00
6dc8a4d530
check for LFC only if there is any slip activity at all; also increased safety factor from 1.2 to 1.5
2011-11-09 09:55:39 +00:00
7033e84fc7
new outputs "accumulatedshear", "velocity_edge", and "velocity_screw" (the latter two replace the output "dislocationvelocity")
2011-11-09 09:22:52 +00:00
8bc39fcd48
immobile density output keeps its sign
2011-11-07 15:46:40 +00:00
34adec74e8
corrected wrong indices into state array for velocity
2011-11-07 15:17:58 +00:00
7dfb96a3da
constitutive_nonlocal:
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dislocation velocities are stored in the state, so we actually now have three "parts" of the state, the basic states that are updated by "constitutive_dotState" come first, then the dependent states that are calculated by "constitutive_microstructure" follow, and finally we have a last part reserved for other variables that just use the memory reserved by the state array and are updated somewhere else.
constitutive:
LpAndItsTangent does not need the full state, but only the local state, so changed that at least for the nonlocal constitutive law
2011-11-04 13:12:17 +00:00
8ac1891b3c
moved DAMASK_NaN to prec.f90 respectively prec_single.f90 as it is precision dependent
2011-10-20 16:46:11 +00:00
7be2701989
* new output variable "internalstress", which gives the internal stress tensor
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* use "math_invert3x3" instead of "math_inv3x3" for inversion of Fe
* for dislocation stress calculation: first regular case, then special case of dead dislocations in central ip
* "dv_dtau" now given for each dislocation type, so is a (ns,4) array
* deleted unused variables in "_LpAndItsTangent"
* corrected contribution of deads in "_LpAndItsTangent"
* the NaN variables defined in math did not give a proper NaN value, so use 0.0/0.0 again
* neighbors with nonlocal constitution but local properties (i.e. /nonlocal/ flag not set) are also considered for incoming fluxes
2011-09-07 11:30:28 +00:00
380a536b45
homogenization_*, constitutive_*, DAMASK_spectral_interface: did some polishing regarding init output
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makefile: corrected spelling mistake
2011-08-26 13:57:29 +00:00
b300cc7faa
ip volume is now based on the determinant of F. "mesh_ipVolume" represents the initial volume and is multiplied with det(F) wherever the current volume is needed. Since this works for all solver types, the "volume" output in crystallite is now also correct for spectral method and abaqus.
2011-08-19 11:18:56 +00:00
6f859e99de
* internal stress calculation now considers dead dislocations always at the interface, not at the center of the IP volume; used to merge them together with "normal" dislocations for stress calculation.
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* dislocation flux is blocked if we encounter a sign change in the resolved shear stress from the central ip to the neighbor
* do not set density to zero if below certain threshold; this creates an artificial sink term
2011-08-02 11:17:45 +00:00
3adb7ab382
corrected makefile, now working again without giving standard values explicitly.
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did some small modification in order to make it possible to compile with gfortran. Changed NaN=0.0/0.0 to bitwise representation (3 different ways)
2011-08-01 10:11:32 +00:00
e39445ee7a
dead dislocations now exert a backstress on their "home" MP
2011-05-26 09:35:42 +00:00
cac45cff96
ip coordinates are now updated every cycle; this is needed for the nonlocal internal stress fields
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* Marc: node displacements are added to initial node coordinates (mesh_node0) to get current node positions (mesh_node), then ip coordinates are deduced
* Abaqus: ip coordinates are directly updated, no update of node coordinates!
* Spectral: for the moment no update of either ip or node coordinates! passing only dummy values with initial ip coordinates
2011-05-24 15:57:59 +00:00
e5a2d829b0
new substructure with 'include' and 'config' directories
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renaming of mpie_... to DAMASK for main usersubroutines
extension of element outputs from 5 to 8 digits (FFT!!!)
2011-05-11 16:38:45 +00:00
7d84a0911e
removed unused variables
2011-04-13 14:16:22 +00:00
c1b8391110
changed enconding of all source files to UTF-8 without BOM (signature) Codepage 65001
2011-04-07 07:20:28 +00:00
4d0fefd231
security factor of 1.2 for CFL condition in constitutive_nonlocal_dotState
2011-04-06 11:47:24 +00:00
4ea1fe436b
added check for CFL condition in constitutive_nonlocal_dotState
2011-04-06 09:07:36 +00:00
fcdb805225
added copyright text to all f90 (free) format files
2011-04-04 14:09:54 +00:00
790dbed1e4
* removed last remnants of old debugger
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* replaced "dble" intrinsic function by "real" with pReal kind in constitutive_nonlocal.f90
* removed useless line breaks in output of state in CPFEM.f90
2011-04-04 08:34:52 +00:00
c36968fc68
distance for periodic images in internal stress calculation was incorrect
2011-03-30 11:57:41 +00:00
314ca3fe7f
Internal stress calculation in nonlocal model: instead of integration of excess gradients (->Bayley) we now sum up contributions from adjacent superdislocations within a certain radius R. When periodicity is used, also periodic images are considered in stress evaluation.
2011-03-29 07:34:33 +00:00
3d51dd36fa
* Introduced preprocessor directives in order to suppress compilation of most write statements when using openmp. This tremendously improves efficiency of parallelization.
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* Also added some more openmp directives to increase percentage of parallelized code.
* "implicit none" was missing in two subroutines of homogenization and constitutive.
2011-03-29 07:27:19 +00:00
b8b75edd7d
no changes to previous version, just wanted to add some comment to the previous commit:
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subroutine "constitutive_nonlocal_dotState" only affects the current dotState, so no need to pass the whole array as argument
2011-03-21 15:23:36 +00:00
9b1e1e35ea
dotState
2011-03-21 15:18:09 +00:00
11138e3ee2
debugging output is now controlled by the "verbosity" parameter in the debug.config ranging from 0 (=almost no output) to 8 (=very detailed output)
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0 : only version infos and all from "hypela2"/"umat"
1 : basic outputs from "CPFEM.f90", basic output from initialization routines, debug_info
2 : extensive outputs from "CPFEM.f90", extensive output from initialization routines
3 : basic outputs from "homogenization.f90"
4 : extensive outputs from "homogenization.f90"
5 : basic outputs from "crystallite.f90"
6 : extensive outputs from "crystallite.f90"
7 : basic outputs from the constitutive files
8 : extensive outputs from the constitutive files
If verbosity is equal to zero, all counters in debug are not set during calculation (e.g. debug_StressLoopDistribution or debug_cumDotStateTicks). This might speed up parallel calculation, because all these need critical statements which extremely slow down parallel computation.
2011-03-21 10:31:17 +00:00
235266b169
openmp parallelization working again (at least for j2 and nonlocal constitutive model).
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In order to keep it like that, please follow these simple rules:
DON'T use implicit array subscripts:
example: real, dimension(3,3) :: A,B
A(:,2) = B(:,1) <--- DON'T USE
A(1:3,2) = B(1:3,1) <--- BETTER USE
In many cases the use of explicit array subscripts is inevitable for parallelization. Additionally, it is an easy means to prevent memory leaks.
Enclose all write statements with the following:
!$OMP CRITICAL (write2out)
<your write statement>
!$OMP END CRITICAL (write2out)
Whenever you change something in the code and are not sure if it affects parallelization and leads to nonconforming behavior, please ask me and/or Franz to check this.
2011-03-17 10:46:17 +00:00
ad4706673b
* removed calculations for dipole formation/dissociation by stress change, since it is not used anyways; also removed associated constitutive outputs from material.config
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* removed input variables in constitutive_collectDotState and constitutive_postResults that are not needed anymore (because of recent changes in constitutive_nonlocal)
2011-02-25 09:53:20 +00:00
cd5407b08b
removed all math functions only for double precision by the more flexible counterpart, e.g. "dsqrt --> sqrt", "dsin --> sin". Should not cause any harm, as long as "implicit none" is used.
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Now it is possible to compile a single precision spectral solver/crystal plasticity by replacing mesh.f90 and prec.f90 with mesh_single.f90 and prec_single.f90.
For the spectral method, just call "make precision=single" instead of "make". Use "make clean" evertime you switch precision
2011-02-25 09:25:53 +00:00
e022810e66
fixed problem in internal stress calculation for periodic neighborhood
2011-02-25 08:10:11 +00:00
e49e5e13af
* in flux calculation: take care of special case for single element model
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* do not overwrite "constitutive_nonlocal_rhoDotFlux" when doing a state perturbation, so we can use it for output
2011-02-24 10:01:41 +00:00
96d3682d5e
* new global integer variable "numerics_integrationMode" (1 indicating integration of central solution, 2 indicating integration of perturbed state)
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* combined "integrator" and "integratorStiffness" in new global variable "numerics_integrator"
2011-02-23 08:29:51 +00:00
d835380bc0
* "constitutive_nonlocal_flux" is set to zero in "constitutive_nonlocal_dotState", not in "constitutive_nonlocal_microstructure"
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* dislocation flux and internal stress calculation now consistent with new definition of slip system lattice according to paper (polarity of screws inverted)
2011-02-23 08:08:06 +00:00
b21c153761
restructured constitutive_nonlocal_compatibility and incorporated the "surfaceTransmissivity" in the compatibility calculation
2011-02-16 16:38:18 +00:00
24d33bf2ff
* added a new material parameter "surfaceTransmissivity" (default value 1.0) which allows to change the transmissivity of the material surface between 0 and 1
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* now complaining when encountering an unknown nonlocal parameter in material.config
* use same error ID for all material parameters out of bounds
* symmetric flux calculation in side dotState can now be omitted (because of new treatment of periodicity)
* switching back to "local flux balance" (add leaving and entering fluxes at central MP, don't touch neighbor) instead of "flux distribution" (subtract leaving fluxes from central MP and add them at neighboring MP). This has the advantage that there is almost no need for CRITICAL statements in parallelization, so hopefully this results in some speed up.
2011-02-16 16:35:38 +00:00
171f5375f1
shearrate output now with sign (no |abs| as before)
2011-02-11 10:19:41 +00:00
803e1a8c05
In order to help preventing further memory leaks all array sections now have an explicit instead of assumed shape, e.g. Fe(1:3,1:3) instead of Fe(:,:).
2011-02-09 13:12:46 +00:00
921967c2ba
* found memory leak in nonlocal model! "constitutive_nonlocal_rhoDotFlux" has to have upper index bound of 10 for second dimension, not 8.
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* need to recalculate dislocation velocity in postResults, otherwise we take values of last perturbed state! So the following outputs were up to now showing the perturbed state: shearrate, dislocation velocity, all density rates!
2011-02-09 08:28:47 +00:00
17a6c0e59b
enhanced comment on dislocation kinetics
2011-02-08 12:48:50 +00:00
faba13f7fd
* now able to introduce some scatter in the initial single dislocation density (only for nonlocal model!) ; setting the parameter "rhoSglScatter" to a positive value generates a gauss distribution for the dislocation density with standard deviation equal to "rhoSglScatter"
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* dislocation stress calculation is only done for nonlocal constitution ("/nonlocal/" keyword is present in material.config)
2011-02-04 15:41:32 +00:00
b72d75ed05
corrected indices in flux density output
2011-01-28 12:49:58 +00:00
05d4d5fef2
* kinetics now according to Mohles; enables solid solution hardening
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* changed example in material.config accordingly
2011-01-26 10:17:42 +00:00
Christoph Kords