9f071c3e01
Added kink-pair pre-factor for screw dislocation mobilities on non-basal slip systems in hex
2010-08-06 15:53:45 +00:00
298cecbfec
corrected syntax errors (long lines, line continuation by \) and logical mistake in mpie_cpfem_marc / abq_std which went unnoticed in ifort. Using SunStudio f90 surfaced those...
2010-08-03 23:47:00 +00:00
60decea760
Calibration (Prismatic slip) of the new dislocation density based CPFE model for single crystal alpha-Ti (Titanmod). Formulated edge and screw dislocations mobilities in presence of kink pairs. Updated comments. The model shows the plateau in stress evolution in prismatic orientation which is observed in experiments.
2010-07-15 07:16:15 +00:00
49926d5d66
F77 --> F90 polishing/condensation as far as possible.
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next step is change of Re/Im FFT to Re only...
2010-07-13 15:29:26 +00:00
4d110126da
adopted improvements done by Arun Prakash.
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mesh:
elemType identification based on lower case
Abaqus now reports more errors
IO:
new function to inquire whether inputfile contains "parts"
new function to assemble multiply included inputfile into a flat one
awareness of range generation in element numbers
error reporting
2010-07-13 10:26:07 +00:00
eb7830dc8f
New Titanium CPFE model based on dislocation density. Running but calibration and changes needed.
2010-07-13 08:19:25 +00:00
397db06fb3
cpfe_general now returns also Kirchhoff-stress P and dPdF
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added dummy variables P and dPdF to mpie_cpfe_* to be able to call cpfem_general correctly
2010-07-07 09:58:18 +00:00
80016f8429
added P and dPdF for the call to cpfem_general, made some comments in the code, aligned some loops
2010-07-07 09:10:54 +00:00
f9834bc612
changed types of integers and reals in fourier transform, changed some variables and cleaned up code to make it easier to understand
2010-07-05 16:01:36 +00:00
c3e222dbbd
errs added etc.
2010-07-05 11:33:48 +00:00
4f76eada31
started suggestions for F77 --> F90 style
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xkdyad useful..?
looking for error calculation (Ricardo to rescue here)
2010-07-02 17:15:53 +00:00
d6ba9d54b6
changed declaration of two variables from real to int, spectral method is now working.
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started to commend Ricardos code, layoutet loops and removed some redundant variables.
until now, no error calculation is done. at the moment calculations are in an infinite loop
2010-07-02 14:10:36 +00:00
661bb97800
corrected some problems in building mesh
2010-07-01 15:20:39 +00:00
2ec39c936c
added first version of spectral method, changed corrected functions to get correct path to files
2010-07-01 15:20:06 +00:00
c3e51e5330
added functions to read out resolution, dimension and homogenization from mesh file
2010-06-25 11:31:05 +00:00
eb0cc24a8e
no need for material parameter "a" anymore, dislocation stress calculation now works without "core spreading"
2010-06-21 16:01:05 +00:00
7d6e52067b
dislocation stress based on dislocation density gradients
2010-06-21 15:58:56 +00:00
6d874e2c1f
nonlocal stiffness calculation:
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rather perturb all components at once (and optionally decrease the frequency of the Jacobian update with the iJaco parameter) than perturbing only a single component per cycle
2010-06-17 06:32:56 +00:00
1c72439350
first shot at init with CPFEM_general
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better would be to manually read the mesh resolution, set up Spectral solution strategy and call CPFEM_general just during BVP solution.
2010-06-10 15:32:06 +00:00
8ea52ac495
mpie_spectral now can read loadcase data
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adapted error codes
2010-06-10 14:51:10 +00:00
386ca7ebc3
added some basic I/O functions to mpie_spectral.f90
2010-06-10 08:50:04 +00:00
740db98090
- use upwind differences scheme for fluxes instead of central differences
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- introduced possibility to "reflect" fluxes at free surfaces in order to have quasi-periodic fluxes
2010-06-09 08:56:00 +00:00
11b98fbfa6
added ID functionality and correct line endings
2010-06-08 10:10:57 +00:00
82687d31c8
first shot at mpie_spectral wrapper
2010-06-08 10:08:15 +00:00
7e78932976
renamed "mpie_cpfem_init" subroutine within mpie_interface module to more general name "mpie_interface_init"
2010-06-08 09:35:13 +00:00
71c6179ee5
dislocation stress had wrong sign in some components
2010-06-08 09:34:23 +00:00
3ce1882d29
when calculating dislocation stress at grain boundaries, densities are now extrapolated similarly to like it was already done at free surfaces
2010-06-07 16:01:37 +00:00
3989cc2688
dislocation stress now considers dislocation segments of length V^(1/3) and ensures non-singular solution for points that are collinear to the dislocation line by means of a core spreading parameter "a". stress is scaled by a reference cutoff radius "r" to avoid mesh-dependent stress values.
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corrected formula for conversion of anisotropic elastic constants to isotropic Youngs modulus and poissons ratio
2010-06-07 14:32:23 +00:00
5283ba5546
if it is pReal it should be 1.0 not just 1
2010-05-31 07:12:45 +00:00
76b392e12f
dislocation stress calculation in constitutive_nonlocal_microstructure: corrected mapping from lattice to slip system frame and the neighboring dislocation density formulation
2010-05-28 13:12:36 +00:00
bb73a74325
there was a line break missing so that it did not compile
2010-05-26 17:10:26 +00:00
9932c90c73
restoring the crystallite.f90, IO.f90 and material.f90 to the version 575. the version 576 of these files contain some uncleared debugging statements.
2010-05-26 16:34:44 +00:00
d114a600c3
fixed some errors in QuaternionToEuler, RToQuaternion to get the correct texture representation in the output.
2010-05-26 15:52:54 +00:00
e5f0af638e
fixed calculation of dislocation stress for elements with a single ip and no neighbors; used to get segmentation fault
2010-05-26 09:17:10 +00:00
0c5bc83469
in nonlocal_microstructure: at the model surface the excess density is now extrapolated from opposite neighbor instead of assuming zero density; this results in better modeling of the dislocation stress at the surface
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restructured nonlocal_dotstate, to be able to easily switch on and off particular effects in the microstructure evolution
nonlocal_dotstate now enforces a cutback when single density runs the risk of becoming negative; in the case of a state already below the relevantState dotState is set to zero
introduced two new output variables: rho_dot_edge and rho_dot_screw
2010-05-21 08:51:15 +00:00
dba4ae7ef1
new numerics parameter "defgradTolerance" replaces "relevantStrain" in cpfem, since "relevantStrain" is also used in crystallite but in a different context.
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"defgradTolerance" gets the same standard value as "relevantStrain" so calculations should be consistent with older ones
2010-05-20 14:55:11 +00:00
3a23dc4bbd
first call to hypela2 in inc 0 is done with computation mode 2 (=plain calc), but since rev. 539 the second call was done with computation mode 6 (=only return values) instead of 2. This doesnt work, because computation mode 2 might calculate stress and tangent for all materialpoints, but the mapping from lattice to current configuration is only done for the element/IP that triggers the call.
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So switched back to the former order of calls which also works for marc2010:
el 1 IP 1 | el 1 IP 2
|
inc mode lovl | inc mode lovl
------------------ | ------------------
0 2 6 | 0 2 6
1 6 4 | 1 6 4
1 4 6 | 1 3 6
1 6 4 | 1 6 4
1 1 6 | 1 2 6
Still to be checked:
according to Franz the lovl order could be different in contact analysis (e.g. starting with lovl 4 instead of 6)
2010-05-20 09:14:59 +00:00
51da3b6242
sorry, in rev 568 some variables were not declared in crystallite_postResults
2010-05-18 12:36:09 +00:00
472684c30e
make element type 8 (= hex8 reduced integration) available for nonlocal constitutive law
2010-05-18 08:13:23 +00:00
19b6fae88b
added a missing exclamation mark in front of an $OMP directive
2010-05-18 08:07:55 +00:00
d96780967b
added some output variables in crystallite: F, Fe, Fp, Ee, P, S
2010-05-18 07:57:13 +00:00
15328e51cf
Like this Euler angles AND grain rotation should be OK.
2010-05-11 15:06:21 +00:00
483584ceb3
improved version of general I/O functions
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renamed module cpfem_interface to mpie_interface
2010-05-11 06:57:15 +00:00
e810e5cfa1
changed fileopen routines in IO.f90 to use solver dependant functions defined in the interface routines
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DID NOT test ABAQUS versions yet, not shure whether (V)GETOUTDIR returns path with or without terminating slash
2010-05-10 15:02:59 +00:00
0416c9a616
reworked build_ipNeighborhood
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added C3D8R reduced integration hexahedral element
2010-05-10 14:54:59 +00:00
2405a51042
crystallite:
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- grainrotation calculation now is done with symmetryID 0, i.e. without symmetry reduction since we want the absolute misorientation.
- While math has everything in radians, post results eulerangles and axisangle are given in degrees.
And: grain rotation seems OK after the previous changes in math module.
2010-05-07 12:01:46 +00:00
97f206d0bc
new errors regarding Spectral method input file parsing
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mesh setup from Spectral input file
$Id$ in FEsolving activated
2010-05-06 16:40:47 +00:00
e4067f2d26
debugged zoo of rotation operations and transformations
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all angles now in radians
introduced a rudimentary check in math_init to complain (IO_error) about broken transformations (e.g. quat --> R --> quat)
2010-05-06 14:07:21 +00:00
f23b4d16d1
updated section with dislotwin paramters
2010-05-06 09:01:54 +00:00
383a36b226
added comment on reformating to common block files
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added modifications necessary for running the subroutine with Marc/Mentat2010
2010-05-06 08:50:54 +00:00
Alankar Alankar