Commit Graph

51 Commits

Author SHA1 Message Date
Haiming Zhang 226381586c compact the code of Yld2004-18p and Karafillis-Boyce, use array instead of components to calculate the partial derivative. 2015-03-16 16:42:26 +00:00
Haiming Zhang a048b2ec15 1. Implement bbc2005 yield criterion (the residum and Jacobian); 2. bbc2005 works 2015-03-13 10:07:23 +00:00
Haiming Zhang 56cf1b53eb add Fourier interplation, anisotropic Vegter yield criterion is okay 2015-03-13 08:50:47 +00:00
Haiming Zhang de29524189 add Vegter criteria, planar isotropy works 2015-03-11 17:42:46 +00:00
Haiming Zhang a62fa5d5dd rewrite class Loadcase
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
Martin Diehl 96a3cb0667 added some ideas regarding the incorporation of the vegter yield criterion 2015-03-09 11:24:06 +00:00
Haiming Zhang 9203b37fbc 1. Implement Hill1979 yield criterion (the residum and Jacobian);
2. Hill1979 works
2015-02-25 17:24:33 +00:00
Haiming Zhang 8b1846e78e 1. Implement Karafillis-Boyce yield criterion (the residum and Jacobian);
2. Karafillis-Boyce works
2015-02-24 16:46:09 +00:00
Haiming Zhang 39e17fc95a 1. add __init__() for the "Class" of each Criterion;
2. Polishing
2015-02-20 20:51:23 +00:00
Haiming Zhang a3e5da0bfd 1. Implement 2D and 3D Cazacu-Barlat yield criteria(the residum and Jacobian);
2. Both work
2015-02-20 20:34:47 +00:00
Haiming Zhang 09c357c70f 1. Fix bug of Yld2004-18p;
2. get deformation rate tensor and Lankford coefficient.
2015-02-20 14:40:24 +00:00
Haiming Zhang 4a63aff1ed 1. Implement Yld2004-18p yield criterion(the residum and Jacobian);
2. Yld2004-18p yield criterion takes effect
2015-02-13 17:22:19 +00:00
Haiming Zhang 77cffd8040 1. fix up Banabic-Balan-Comsa 2003 (BBC2003) yield criterion;
2. add the calculation Jacobian of BBC2003; 
3. Now BBC2003 yield criterion takes effect
2015-02-12 20:48:03 +00:00
Haiming Zhang 69af205721 add the calculation of Jacobian of isotropic and anisotropic Barlat1991, shows better performance. 2015-02-12 11:04:00 +00:00
Haiming Zhang 40f1f3af23 add the calculation of Jacobian of Hill1948 and Drucker family criteria. 2015-02-11 19:06:23 +00:00
Haiming Zhang eed00007f9 Re-write the script:
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
Haiming Zhang f3bab46275 addthe Cazacu–Barlat (CZ) yield criterion (3D and 2D), Banabic–Balan–Comsa (BBC) Yield Criterion. 2015-02-07 16:58:57 +00:00
Haiming Zhang cdb7795956 1. Add default boundary constraint(no constraint) and initial guess to the dictionary
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
Haiming Zhang 0350b1829c 1. Replace curve_fit(see minpack.py) with curve_fit_bound(see damask/util.py), now the boundary constraint can be applied.
2. Transfer the output information into dictionary 'fittingCriteria', compact subroutine 'fit'.
2015-02-06 14:01:04 +00:00
Haiming Zhang ce09e992cc 1. Change yieldStress from 'list' to 'numpy.arrary', thanks to Martin's suggestion (3907);
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
Martin Diehl 0b3205a24b some suggestions how to simplify 2015-02-06 09:29:21 +00:00
Haiming Zhang 4f2c07063b Fix general Hosford! 2015-02-05 20:18:07 +00:00
Haiming Zhang 2b704b3905 Fix: Tresca, von Mises, Drucker, Hill 1948 criteria. 2015-02-04 16:47:35 +00:00
Haiming Zhang 2d568b49f2 add the output of standard deviation errors;
fix Hill 48 and anisotropic Barlat 1991
2015-02-04 13:04:34 +00:00
Haiming Zhang 3845c47e61 complement of 3897: add isotropic and anisotropic Barlat 1991 to the dictionary 2015-02-03 12:57:18 +00:00
Haiming Zhang bef846d294 add isotropic and anisotropic Barlat1991 yield criteria. 2015-02-03 12:54:16 +00:00
Haiming Zhang 55445af9bc 1. add initial guess and weight to the fitting (nonlinear least square regression);
2. extend the dictionary:fittingCriteria
2015-02-03 12:18:53 +00:00
Haiming Zhang cc6138ec41 rewrite "def fit()";
add format output.
2015-02-02 17:41:19 +00:00
Haiming Zhang fd75772a3f Fix the bug of calculating principal stresses. Now the fitting result is better for the criteria which expressed in principal stresses.
Thanks to Martin.
2015-02-02 16:52:28 +00:00
Martin Diehl d86f091026 some small fixes, reporting still needs update 2014-10-06 12:47:52 +00:00
Martin Diehl 2836b2fb35 work in progress, extending to more criteria 2014-10-03 09:27:20 +00:00
Martin Diehl 033a275d82 a bunch of small changes. deleted compiled FFTW libraries 2014-10-02 21:27:03 +00:00
Martin Diehl afb9a2186b removed explicit default setting: type='string' and action='store' 2014-09-12 14:14:55 +00:00
Martin Diehl c6eab9dab7 fixed wrong order in linear interpolation for stress 2014-08-18 20:09:09 +00:00
Martin Diehl 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
Martin Diehl ad7fe1ecbc fixed bug (wrong index in stress tensor for Hill48) and possible deadlock 2014-08-10 21:22:22 +00:00
Martin Diehl c8f16f16fa fixed bug in hill criterion 2014-08-06 20:07:47 +00:00
Martin Diehl 649e637561 added some more post processing tests and improved output 2014-08-06 19:06:33 +00:00
Martin Diehl 96fe818f5d added more options to command line 2014-08-05 14:29:36 +00:00
Martin Diehl b4b9835d18 some work on the yield surface generator 2014-08-04 21:15:56 +00:00
Martin Diehl a804b23b7a bugfixing 2014-07-24 22:02:10 +00:00
Martin Diehl 42032cbc25 started to restructure fitting to criterion 2014-07-22 21:59:58 +00:00
Martin Diehl c8cd775747 added spectral solver grid location and index function to util library 2014-07-21 17:49:45 +00:00
Martin Diehl fd2164b391 von Mises fitting seems to work, still needs polishing (adding options etc) 2014-07-09 09:31:26 +00:00
Martin Diehl 5f638a059a corrected string substitution 2014-07-09 07:17:58 +00:00
Martin Diehl fdb4f2ffea now the program flow is working 2014-07-08 16:09:02 +00:00
Martin Diehl 7a478d646a added call to DAMASK spectral 2014-07-07 14:17:44 +00:00
Martin Diehl a48b4cfc95 improved dummy yield surface generator 2014-07-04 13:40:15 +00:00
Martin Diehl a68fe7c77b first draft of a script to compute yield surfaces with the spectral solver 2014-07-02 10:42:51 +00:00
Martin Diehl 342ca0be47 tested new scripts to update shebang, all files got same shebang (and for python files encoding) 2014-04-01 18:41:14 +00:00