77e9b80a16
bug fix for calculation of fluxdensity and slipnormal/direction in constitutive_nonlocal_postResults: indices for Fe were missing
2013-05-23 14:52:57 +00:00
41faa60323
fixed bug in backstress calculation for elements with periodic neighbors
2013-05-23 12:36:48 +00:00
3aaf60cffe
polishing
2013-05-23 12:25:56 +00:00
ec2503253e
added output of slip direction and slip normal
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changed name of fluxdensity outputs
2013-05-23 08:19:36 +00:00
e758ee32be
improved accuracy of accumulated shear output: take shear rate from LpAndItsTangent for time integration
2013-05-21 10:04:52 +00:00
3759024b42
forgot to set neighboring_rho (also reverting changes made in rev 2384)
2013-05-19 19:23:31 +00:00
0504fb3b21
reverted changes made in rev2384
2013-05-17 12:54:47 +00:00
6fac7c347c
fixed bug in constitutive_nonlocal_kinetics that was introduced in rev2088 along with the non-Schmid behavior: nonSchmid matrix of last slip system was used for all slip systems; led to extremely bad convergence due to flawed dLp_dT
2013-05-10 22:29:12 +00:00
d9cc42daef
slight change in flux formulation: no flux to neighbor, not only if there is a sign change in the velocity, but also if the neighboring velocity is exactly zero
2013-05-10 08:42:42 +00:00
b2a3c9235b
fixed some warnings issued by gfortran (type conversion, not needed use statements)
2013-05-08 09:23:47 +00:00
6e64b5c476
better not allow for deads to contribute to flux, since not clear at which interface they got stuck
2013-05-07 18:47:17 +00:00
a7706090d2
neighborhood relations were screwed up for some elementtypes as of version 2318, might have caused segmentation faults with nonlocal model, now fixed
2013-04-22 13:35:35 +00:00
ad879ebcf9
forgot to delete all occurrences of obsolete "constitutive_nonlocal_ accumulatedShear" in last commit
2013-04-08 08:51:12 +00:00
10e50bf41d
improved accuracy of "accumulated shear": now added as a state variable, which facilitates integration (dotstate=shearrate); needs absolute tolerance value for state integration in material.config
2013-04-04 13:37:14 +00:00
3c25723139
- make sure that formerly blocked density is not able to move to neighbor until it is remobilized
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- added some explicit indices instead of ":"
2013-04-03 16:29:48 +00:00
6d3f05b387
small changes in nonlocal constitutive model:
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- make sure neighboring density is always greater equal zero
- no extra Bauschinger in postResults
2013-04-03 16:22:55 +00:00
b8f8d66f82
total density used in backstress calculation now based on average of neighborhood
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fixed small bug in state_init: random distribution of density was probably not working correctly, as some variables were not properly initialized
2013-03-27 13:04:01 +00:00
19655c2d92
significantRho check was flawed for dipole density
2013-03-25 17:36:04 +00:00
02f092492e
updated copyright header
2013-03-22 17:35:05 +00:00
cee90bbdb3
simplified dislocation kinetics: dropped relativistic correction of velocity, since the infinite attack frequency already sets a limit for the velocity; dropped second; also dropped the correction term for backward jumps, since it was probably not meaningful
2013-03-21 12:52:29 +00:00
07ff1f7c93
reporting current time for most module inits
2013-02-25 16:34:59 +00:00
c1cf446774
parsing of material.config file now expects adequate number of (slip/twin) family entries according to given lattice type.
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used to read up to maxN, but that caused unnecessary IO_warnings...
2013-02-14 22:24:55 +00:00
f0b4281400
removed unused variables, added pure statements, and declared external functions as external (using gfortrans debug option)
2013-02-11 10:43:45 +00:00
362cbf3359
Made corresponding changes in the constitutive files and DAMASK_spectral_driver and interface files with respect to the changes made to IO.f90
2013-02-06 16:45:34 +00:00
e74b5da19a
changed all remaining routines to fortran-fast arrays (geometry reconstruction etc.)
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changed all remaining routines in f2py to more clever determination of array size (requires f2py >= 2.0)
enabled 3D visualize to work with odd resolution by switching to linear reconstruction
PLEASE NOTE: Redefinition of routines for f2py might cause trouble -> DELETE DAMASK_ROOT/lib/damask/core.so in this case
further changes: added pure statement where possible, polished, unified use of "Q" for "Quaternion" and reordered math to have similar routines together
2013-01-31 16:28:08 +00:00
50e874f887
fixed bug in elasticity matrix calculation
2013-01-22 15:48:47 +00:00
df089b94bd
line break in lines > 132
2013-01-22 11:06:39 +00:00
2b319f02e6
small corrections on changes related to non-schmid systems
2013-01-22 10:04:15 +00:00
f3bd920c23
added non-schmid structure
2013-01-21 23:50:28 +00:00
60fec0e8ec
added code structure for non-schmid mechanics. work in progress…
2013-01-21 23:11:16 +00:00
fd94c786f0
moved stiffness tensor calculation to lattice
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introduced 'isotropic' and 'orthorhombic' lattice types to use corresponding symmetries in stiffness tensor. intended to be used with non-crystal plasticity models (j2, constitutive_none with isotropic, cubic or orthotropic elasticity).
2013-01-21 21:57:26 +00:00
093cf92338
remove omp statements during initialization, "line" for reading in from material.config now has a default (empty) value to prevent conditional jump depend on this value
2013-01-08 22:11:59 +00:00
f14fd45ce1
new material parameter "egdejog": fraction of annihilated screw dipoles that forms edge jogs
2012-12-23 12:56:15 +00:00
03a88d4798
fixed timesyncing for special case of ip that synchronizes its time step, but does not have a neighbor
2012-12-11 13:38:36 +00:00
37028455e9
always use the current state for leaving flux calculation when no neighbor is present
2012-12-09 12:24:32 +00:00
149c747688
use non-corrected densities for rate check in dotState
2012-12-06 17:14:35 +00:00
1f5a30d6f0
corrected typo in random multiplication term
2012-12-06 14:04:18 +00:00
20f7053ad3
correction of interaction coefficients due to line tension effect only applies to coefficients 3, 4 and 5
2012-12-04 18:23:46 +00:00
9eb89b0050
made random multiplication switchable via material.config
2012-12-03 12:59:38 +00:00
62ddbf26df
slightly changed the multiplication term in the nonlocal model for the starvation case
2012-11-29 18:50:25 +00:00
f92d34dd22
removed some unused variables
2012-11-29 18:44:00 +00:00
29618df550
annihilate only part of the screw dipoles (specified by minimumDipoleHeight), not all; moved annihilation of screws from deltaState back to dotState
2012-11-28 12:09:48 +00:00
e10000a338
Introduced an alternative cutback scheme for the nonlocal model, that allows to keep the results of most of the ips that immediately converged, and only do cutbacks in regions where some ips are in big trouble. Only works for nonlocal model and state integrator 2.
2012-11-27 18:36:55 +00:00
4195d53d11
message of last commit was incomplete: moved annihilation of screw dipoles from dotstate to deltaState, since it is not a rate
2012-11-17 13:54:22 +00:00
467c186f0f
annihilation of screws
2012-11-17 13:50:20 +00:00
d9a98417ca
switched element library to geomType based.
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saves to copy same geometry description for different elements that are essentially similar regarding the IP number but differ in total node count.
introduced quadratic tetrahedron (Marc element 127 -- element 157 might also work, but did not perform well in fully elastic calc so far)
2012-11-15 22:45:20 +00:00
5b6baa7c0d
introduced distinction between ip coordinates and cell center coordinates; the former can be globally calculated by subroutine mesh_build_ipCoordinates, the latter locally by the function mesh_cellCenterCoordinates; renamed mesh_ipCenterOfGravity to mesh_ipCordinates
2012-11-06 14:37:13 +00:00
55dc286be2
corrected limit for upper stable dipole distance; fixed a bug in the postResults where division by zero might happen
2012-10-29 13:02:01 +00:00
f666f8dcf3
added possibility to scale the plastic shearrate by the ratio of mobile to total density; keyword in material.config is "deadZone"
2012-10-29 12:49:28 +00:00
0980920b66
In crystallite: for state integrators 2 and 3 the deltaState always has to be done at the beginning of the integration, not at the end; otherwise the stiffness calculation can be completely wrong, when the state is changed after the stress integration for the central solution.
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Also changed some debugging levels in crystallite and mainly in constitutive_nonlocal
2012-10-22 07:59:35 +00:00
3ecaa9e371
modified multiplication term in order to mimic a discrete distribution of dislocation sources; namely, at high resolution, when there is (on average) less than one source per integration point, a random generator decides whether there is a source in the finite volume or not; if there is one, then the multiplication turns independent of the density and depends only on the velocity/volume times a scalar factor; recovers density*velocity/lambda for large finite volumes
2012-10-19 11:40:17 +00:00
e4054c116d
fixed problem with gnu compiler: allocation of variables in constitutive_nonlocal_stateInit was not safe when not using any nonlocal constitution
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put header of debugging output in constitutive_init at the start of the function in order to make debugging easier
2012-10-09 12:34:57 +00:00
a84e0529c3
make correction of hardening coefficients thread safe
2012-10-05 16:05:51 +00:00
40a2e652e7
introduced material parameter "linetension", which indicates how strong the effect of the line tension on the hardening coefficients is
2012-10-05 14:42:41 +00:00
7cc6108a04
hardening coefficients for fcc are density dependent (line tension effect, Devincre, Kubin, Hoc; 2006; Physical analyses of crystal plasticity by DD simulations)
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fixed bug with thermal annihilation producing negative density in case of very small dipole density and high climb velocity
2012-10-04 18:08:40 +00:00
bce8012c89
random distribution of initial dislocation density now really independent of meshsize
2012-10-02 15:26:58 +00:00
91b7883c2a
random distribution of initial dislocation density now independent of mesh size
2012-10-02 13:35:34 +00:00
1502a71f0c
added possibility to start with an initial random distribution of dislocation segments with specific overall density
2012-10-02 12:57:24 +00:00
29023cea3c
minor correction of debugging output
2012-09-05 11:19:46 +00:00
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
Christoph Kords