Commit Graph

141 Commits

Author SHA1 Message Date
Pratheek Shanthraj 23e8fcbc51 updated config file with new convergence parameters 2013-08-08 09:12:12 +00:00
Martin Diehl 2dc985f558 set tolerances to useful values and renamed them.
allowed "keyword = value" in numerics.config (simply removing "=" from line)
2013-07-31 15:03:38 +00:00
Franz Roters 4f7cd76b29 renamed texture_rotation into texture_transformation
changed keyword for material.config to axes in line with geom_fromAng.py
former keyword rotation is still recognized for compatibility
2013-07-24 11:09:39 +00:00
Franz Roters 4a291dc372 implementation of twin nucleation criteria according to Davids PhD thesis
applies for fcc crystal structure only
2013-07-01 13:06:01 +00:00
Franz Roters 9a1ad7e089 added third value for slip twin interaction in fcc dislotwin example 2013-06-24 12:53:56 +00:00
Christoph Kords ec2503253e added output of slip direction and slip normal
changed name of fluxdensity outputs
2013-05-23 08:19:36 +00:00
Nader Zaafarani 882c3e155f Adding two titles for accumulated shear due to "slip" and "twin" 2013-05-19 20:34:40 +00:00
Martin Diehl c7ba8a2a9b introduced plain mode (no ping pong) again and added test for MSC.MArc 2012 as prove that its working 2013-05-17 17:52:46 +00:00
Franz Roters d2416abdb4 introduced new keyword 'rotation' to specify texture rotation
ATTENTION: so far it is read but NOT yet applied!!!
waiting for updated code for orientation assignement
2013-05-02 08:35:37 +00:00
Christoph Kords 9b1fd579d4 corrected phase numbering in example material.config 2013-04-10 12:09:09 +00:00
Martin Diehl ddcc795461 allowed arbitrary grid (formerly know as resolution), i.e. any integer>1 in each dimension is possible.
removed square root correction for divergence (doesn't make sense)
fixed FFT debug of spectral solver
2013-04-10 10:19:16 +00:00
Christoph Kords 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
Martin Diehl 5b8257a7f9 added debugging possibility for MSC.Marc, rename parameters to CAPITALS 2013-03-31 13:06:49 +00:00
Christoph Kords 44eb771583 added crystallite output of current ip coordinates 2013-03-27 10:12:28 +00:00
Martin Diehl 15b6242585 set more appropriate default values for spectral solver tolerances (abs stress BC was at huge()) 2013-03-26 16:36:52 +00:00
Pratheek Shanthraj be655ae536 Changed AL solver errors to absolute. Stress boundary error now max of relative and absolute error 2013-03-22 14:46:55 +00:00
Christoph Kords 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
Martin Diehl dd06d07e1c set default number of iteration for spectral solver to 250 instead of 40, abaqus doxygen now does the correct inclusion (everything appeared twice before) 2013-03-14 23:10:02 +00:00
Martin Diehl 1779510dda remove some unused variables, set default value for divergence calculation to 1.e-5 and made calculation independent of dim and res 2013-03-12 18:48:28 +00:00
Pratheek Shanthraj 72bc1df832 forgot in previous commit 2013-02-28 17:37:26 +00:00
Martin Diehl cd0325baf1 introduced atol_twinfrac for dislotwin
set values in material.config example
atol_rho            1.0,
atol_twinFrac       1.0e-7
2013-02-14 09:57:26 +00:00
Martin Diehl 77c0b32af9 removed possible (but not-working) output of schmid_factor_shearband from dislotwin 2013-02-14 08:53:17 +00:00
Philip Eisenlohr c7740b41a5 added possible accumulated shear output request to example list of phenopowerlaw 2013-02-07 11:09:14 +00:00
Pratheek Shanthraj fd94c786f0 moved stiffness tensor calculation to lattice
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
Christoph Kords 8a45a90775 new crystallite output "grainrotationX", "grainrotationY", "grainrotationZ" that gives the deviation of the initial orientation in degrees around the sample reference x/y/z axis, while "grainrotation" still gives the same as axis angle pair in crystal coordinates 2013-01-16 08:45:41 +00:00
Martin Diehl 738f363263 corrected small issues with PETSc debugging 2013-01-03 16:17:23 +00:00
Christoph Kords f14fd45ce1 new material parameter "egdejog": fraction of annihilated screw dipoles that forms edge jogs 2012-12-23 12:56:15 +00:00
Martin Diehl 5c0c7121e7 made PETSc silent by removing -snes_view from default options.
introduced PETSc option for debugging that introduces some debugging options into the petsc options and move PETSc initialization from numerics to DAMASK_spectral_utilities
2012-12-15 18:07:49 +00:00
Martin Diehl b1f28ba5e7 made restart working for all solvers and added corresponding test
corrected error handling for FFT based function in case of odd numbers etc.
2012-12-14 17:30:22 +00:00
Christoph Kords 9eb89b0050 made random multiplication switchable via material.config 2012-12-03 12:59:38 +00:00
Christoph Kords 62ddbf26df slightly changed the multiplication term in the nonlocal model for the starvation case 2012-11-29 18:50:25 +00:00
Christoph Kords 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
Christoph Kords 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
Martin Diehl 324dfda5a2 added comments (doxygen conform) to phenopowerlaw, added warning on specifying h0_sliptwin as it has no effect 2012-10-11 14:49:12 +00:00
Christoph Kords 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
Christoph Kords 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
Franz Roters 9fc46b4950 added /echo/ statements 2012-10-02 08:12:53 +00:00
Christoph Kords 8336d0705c new numerics parameter "unitlength" that scales the model size in DAMASK; this enables to use very small models in marc without getting any numerical problems for example with contact which does not seem to work when using very small numbers 2012-09-24 06:13:26 +00:00
Martin Diehl 1cfc467705 added new cut back parameter for spectral solver and instrumented variables for use with doxygen 2012-09-13 09:48:38 +00:00
Christoph Kords f153866030 introduced factor to control edge contribution to multiplication;
dislocation density below a single dislocation per IP considered not significant
2012-09-04 16:56:37 +00:00
Christoph Kords 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.
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
Christoph Kords aa380dcb08 added separate output of dipole formation rate for edge and screw 2012-08-27 15:57:22 +00:00
Christoph Kords 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
Christoph Kords 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
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
Pratheek Shanthraj d0933dad7b added filter option to the spectral solver to mitigate spurious oscillations due to gibb's phenomenon. activate by setting myfilter in config file appropriately (currently only 'none' and 'cosine' options coded). more cleaning up of AL code 2012-08-07 17:23:13 +00:00
Pratheek Shanthraj 32f8c9c6ea moved petsc option string to numerics and added new numerics parameters to config file 2012-08-06 17:27:53 +00:00
Philip Eisenlohr 882c44a61d changed the majority of debugging output to level "extensive" 2012-07-24 15:29:23 +00:00
Philip Eisenlohr 0fdd43b54b minor clarification of file content and its use 2012-07-05 10:02:20 +00:00
Franz Roters 823013d485 new plasticity: none
see material.config for necessary parameters (lattice_structure, elastic constants)
2012-07-03 11:16:38 +00:00
Martin Diehl 1003cfa7f8 added missing space in makefile, made removing of old files in Makefile silent and updated files for tests to current versions 2012-05-23 18:08:34 +00:00
Nan Jia bbf790a0a5 Input parameter 'QedgePerSbSystem' which denotes activation energy for each shear band system is added 2012-05-22 16:10:28 +00:00
Martin Diehl cec3357e8f corrected bug causing wrong element construction when using spectral solver. Also improved error messages for invalid resolution, dimension, and homogenization. 2012-05-21 09:06:02 +00:00
Franz Roters 701cf2e71b replaced duplicated math entry by missing mesh entry 2012-05-15 14:58:47 +00:00
Martin Diehl 9a92d343dc added Onurs modified description for tausat in j2 law.
Polishing phenopowerlaw
2012-04-11 14:01:02 +00:00
Martin Diehl f2da887899 added missing ":" in mesh.f90, introduced absolute stress tolerance for spectral solver in numerics.config/numerics.f90 2012-04-11 12:57:25 +00:00
Franz Roters 7947ae36b3 changed default value of err_div_tol 2012-03-22 10:33:54 +00:00
Martin Diehl dbdc7ddfa2 debug.config, debug.f90, DAMASK_abaqus_exp.f, DAMASK_abaqus_std.f: changed to new debug scheme (wasn't working)
lattice.f90, FEsolving.f90: explicitly defined public functions and variables, all others are now private
numerics.f90: changed output format of real numbers, now instead of 0.1eX 1.0e(X-1) is printed to screen
Makefile: now using correct Optimization flags for OPTIMIZATION=AGGRESSIVE
DAMASK_spectral_AL.f90: improved, but still testing. Stress BCs now seem to be handled correctly
2012-03-20 18:01:31 +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 503f6ed040 i think it's elasticity not elaticity, right? 2012-03-15 08:46:51 +00:00
Franz Roters 36edb4dd9f introduced keyword elasticity in material.config
added constitutive_TandItsTangent and special version constitutive_hooke_TandItsTangent
those are however not yet used and need to be tested
2012-03-14 16:16:11 +00:00
Pratheek Shanthraj c2f5cebacb simplified analytic jacobian calculation. removed Lpfrac, time_sensitive. introduced rate_sensitivity flag when calling crystallite_stressAndItsTangent that is currently set to .false. and is to be set according to which dPdF the FE solver is asking for 2012-03-14 13:56:50 +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
Pratheek Shanthraj 17e9698659 added time_sensitive flag to ignore or add time sensitive component to analytic jacobian (should be close to perturbed jacobian when ignored)
now uses sub_dt for analytic jacobian calculations
bug fixes
2012-03-01 19:42:43 +00:00
Nan Jia 211f66a728 added elastic stiffness matrix as crystallite output 2012-03-01 13:06:09 +00:00
Franz Roters 1042ac018f output values used for Lp_frac and analyticJaco
improved comment for Lp_frac on numerics.config
2012-02-24 08:21:18 +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
Franz Roters 989a2b2d39 added default entries for Lp_frac and analyticJaco 2012-02-23 10:53:15 +00:00
Christoph Kords 8dc6e256c0 choose textures and phases of example materials according to what the labels suggest 2012-02-21 13:16:59 +00:00
Christoph Kords 5ddade27fc changed Peierls stress to more realistic values for fcc 2012-02-03 13:12:45 +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
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 4980f57fd5 added total Green-Lagrange strain to crystallite outputs 2012-01-20 10:25:35 +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
Franz Roters 515986c4d6 renamed w0 and w0_slip to a and a_slip 2011-11-23 14:48:39 +00:00
Martin Diehl 5ef73e164a restructured algorithm: moved into loop to reallocate fields and replan FFTW in case resolution changes during runtime ==> regridding
introduced parameters for selective debugging of spectral code and partly introduced the advanced divergence calculation again which is controlled by debug.config
added switch in numerics to control divergence behavior (uncorrected and corrected by phenomenological factor)
added precision directive to all values I found
2011-11-15 17:54:18 +00:00
Christoph Kords 7033e84fc7 new outputs "accumulatedshear", "velocity_edge", and "velocity_screw" (the latter two replace the output "dislocationvelocity") 2011-11-09 09:22:52 +00:00
Franz Roters 58917b5abe corrected error messages
you can now switch of shear banding by seting sb_velocity to zero
stacking fault energy parameters are now read from material.config
2011-09-26 09:55:08 +00:00
Franz Roters 9d091bdc3f added parameters for shear band model 2011-09-14 13:35:28 +00:00
Martin Diehl f527bdcc78 changed standard values according to numerics.f90 2011-08-30 11:21:39 +00:00
Philip Eisenlohr 2e9c605571 somehow forgot to move the numerics.config into the config subdir... 2011-07-21 08:40:45 +00:00
Christoph Kords 9a64f3dd85 * comments are now recognized by IO even when they do not appear at the beginning of the line
* no need for the zero entries in the material.config anymore
2011-05-30 09:09:19 +00:00
Christoph Kords bbf75f3fb5 cannot omit entries for second to fourth slip system family, though they are zero 2011-05-30 07:53:41 +00:00
Franz Roters 08d39342e4 reworked restarting for compatibility with abaqus (not yet fully working)
added new orientation feature for direct simulation:
  component type (random) asigns random orientation to an entire grain
2011-05-28 09:44:43 +00:00
Christoph Kords a910c469df update of nonlocal material parameters 2011-05-20 08:11:22 +00:00
Philip Eisenlohr 1baae024cb added two more <crystallite> examples 2011-05-13 16:54:08 +00:00
Philip Eisenlohr d366a53f4e probably installation is a better place for the abq.env file 2011-05-11 17:10:45 +00:00
Philip Eisenlohr e5a2d829b0 new substructure with 'include' and 'config' directories
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