a048b2ec15
1. Implement bbc2005 yield criterion (the residum and Jacobian); 2. bbc2005 works
2015-03-13 10:07:23 +00:00
56cf1b53eb
add Fourier interplation, anisotropic Vegter yield criterion is okay
2015-03-13 08:50:47 +00:00
de29524189
add Vegter criteria, planar isotropy works
2015-03-11 17:42:46 +00:00
a62fa5d5dd
rewrite class Loadcase
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1. add 2 dimension random load case generator
2. add Vegter load case generator(typical stress points in 2D)
2015-03-09 21:57:22 +00:00
96a3cb0667
added some ideas regarding the incorporation of the vegter yield criterion
2015-03-09 11:24:06 +00:00
9203b37fbc
1. Implement Hill1979 yield criterion (the residum and Jacobian);
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2. Hill1979 works
2015-02-25 17:24:33 +00:00
8b1846e78e
1. Implement Karafillis-Boyce yield criterion (the residum and Jacobian);
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2. Karafillis-Boyce works
2015-02-24 16:46:09 +00:00
39e17fc95a
1. add __init__() for the "Class" of each Criterion;
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2. Polishing
2015-02-20 20:51:23 +00:00
a3e5da0bfd
1. Implement 2D and 3D Cazacu-Barlat yield criteria(the residum and Jacobian);
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2. Both work
2015-02-20 20:34:47 +00:00
09c357c70f
1. Fix bug of Yld2004-18p;
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2. get deformation rate tensor and Lankford coefficient.
2015-02-20 14:40:24 +00:00
4a63aff1ed
1. Implement Yld2004-18p yield criterion(the residum and Jacobian);
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2. Yld2004-18p yield criterion takes effect
2015-02-13 17:22:19 +00:00
77cffd8040
1. fix up Banabic-Balan-Comsa 2003 (BBC2003) yield criterion;
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2. add the calculation Jacobian of BBC2003;
3. Now BBC2003 yield criterion takes effect
2015-02-12 20:48:03 +00:00
69af205721
add the calculation of Jacobian of isotropic and anisotropic Barlat1991, shows better performance.
2015-02-12 11:04:00 +00:00
40f1f3af23
add the calculation of Jacobian of Hill1948 and Drucker family criteria.
2015-02-11 19:06:23 +00:00
eed00007f9
Re-write the script:
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1. replace curve_fit with leastsq, which supports the analytical Jacobian
2. specify a "class" (contains both residum and jacobian) for each criterion.
3. add the calculation of Jacobian
2015-02-11 16:49:40 +00:00
f3bab46275
addthe Cazacu–Barlat (CZ) yield criterion (3D and 2D), Banabic–Balan–Comsa (BBC) Yield Criterion.
2015-02-07 16:58:57 +00:00
cdb7795956
1. Add default boundary constraint(no constraint) and initial guess to the dictionary
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2. With the boundary constraint of exponential term, now non-quadratic yield criteria (isotropic Barlat 1991, anisotropic Barlar 1991, Hosford) take effect.
2015-02-07 11:07:45 +00:00
0350b1829c
1. Replace curve_fit(see minpack.py) with curve_fit_bound(see damask/util.py), now the boundary constraint can be applied.
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2. Transfer the output information into dictionary 'fittingCriteria', compact subroutine 'fit'.
2015-02-06 14:01:04 +00:00
ce09e992cc
1. Change yieldStress from 'list' to 'numpy.arrary', thanks to Martin's suggestion (3907);
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2. Change '3*3' Cauchy stress tensor to '1*6', now the number of input 'xdata' for fitting is 6*Points, which is less than the former 9*Points.
2015-02-06 13:48:14 +00:00
0b3205a24b
some suggestions how to simplify
2015-02-06 09:29:21 +00:00
4f2c07063b
Fix general Hosford!
2015-02-05 20:18:07 +00:00
2b704b3905
Fix: Tresca, von Mises, Drucker, Hill 1948 criteria.
2015-02-04 16:47:35 +00:00
2d568b49f2
add the output of standard deviation errors;
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fix Hill 48 and anisotropic Barlat 1991
2015-02-04 13:04:34 +00:00
3845c47e61
complement of 3897: add isotropic and anisotropic Barlat 1991 to the dictionary
2015-02-03 12:57:18 +00:00
bef846d294
add isotropic and anisotropic Barlat1991 yield criteria.
2015-02-03 12:54:16 +00:00
55445af9bc
1. add initial guess and weight to the fitting (nonlinear least square regression);
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2. extend the dictionary:fittingCriteria
2015-02-03 12:18:53 +00:00
cc6138ec41
rewrite "def fit()";
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add format output.
2015-02-02 17:41:19 +00:00
fd75772a3f
Fix the bug of calculating principal stresses. Now the fitting result is better for the criteria which expressed in principal stresses.
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Thanks to Martin.
2015-02-02 16:52:28 +00:00
d86f091026
some small fixes, reporting still needs update
2014-10-06 12:47:52 +00:00
2836b2fb35
work in progress, extending to more criteria
2014-10-03 09:27:20 +00:00
033a275d82
a bunch of small changes. deleted compiled FFTW libraries
2014-10-02 21:27:03 +00:00
afb9a2186b
removed explicit default setting: type='string' and action='store'
2014-09-12 14:14:55 +00:00
c6eab9dab7
fixed wrong order in linear interpolation for stress
2014-08-18 20:09:09 +00:00
e637f6344c
added possibility to fit to more than one yield point, now using linear interpolation between around given threshold value
2014-08-18 18:21:36 +00:00
ad7fe1ecbc
fixed bug (wrong index in stress tensor for Hill48) and possible deadlock
2014-08-10 21:22:22 +00:00
c8f16f16fa
fixed bug in hill criterion
2014-08-06 20:07:47 +00:00
649e637561
added some more post processing tests and improved output
2014-08-06 19:06:33 +00:00
96fe818f5d
added more options to command line
2014-08-05 14:29:36 +00:00
b4b9835d18
some work on the yield surface generator
2014-08-04 21:15:56 +00:00
a804b23b7a
bugfixing
2014-07-24 22:02:10 +00:00
42032cbc25
started to restructure fitting to criterion
2014-07-22 21:59:58 +00:00
c8cd775747
added spectral solver grid location and index function to util library
2014-07-21 17:49:45 +00:00
fd2164b391
von Mises fitting seems to work, still needs polishing (adding options etc)
2014-07-09 09:31:26 +00:00
5f638a059a
corrected string substitution
2014-07-09 07:17:58 +00:00
fdb4f2ffea
now the program flow is working
2014-07-08 16:09:02 +00:00
7a478d646a
added call to DAMASK spectral
2014-07-07 14:17:44 +00:00
a48b4cfc95
improved dummy yield surface generator
2014-07-04 13:40:15 +00:00
a68fe7c77b
first draft of a script to compute yield surfaces with the spectral solver
2014-07-02 10:42:51 +00:00
Haiming Zhang