Mailman 3 September 2008 - SfePy

meshpy
by Robert Cimrman Sept. 19, 2008

Sept. 19, 2008

Hi, I have just come around an interesting piece of software: http://mathema.tician.de/software/meshpy Has anybody some experience with it? r.

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dft.c
by osman Sept. 7, 2008

Sept. 7, 2008

Robert, Ondrej, how about f2c to turn dft.f into dft.c you just need f2c.h. I just edited the .f file, moved the integer declaration to above the "data" statement and ran f2c. gcc -o dft.so --shared -fPIC dft.c created the .so file. shroedinger.py still seems to work. br. -osman

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sfepy 0.5 tests on 64 bit ubuntu
by osman Sept. 6, 2008

Sept. 6, 2008

Hi Robert, Ondrej, Finally I was able to re-build numpy/scipy and tried the new version of sfepy. Even during building of scipy, whenever a fortran or f2py based shared lib to be built, I need to manually insert "-shared" to the command (that is after it fails to build an executable! . Same with sfepy physics module. But tests did run and two failed : ... tests/test_lcbc_2d.py --- test_linear_rigid_body_bc: failed! tests/test_lcbc_3d.py --- test_linear_rigid_body_bc: failed! ... expected? Regards, -osman

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ANN: SfePy-00.50.00
by Robert Cimrman Sept. 2, 2008

Sept. 2, 2008

I am pleased announce the release of SfePy 00.50.00. SfePy is a finite element analysis software in Python, based primarily on Numpy and SciPy. Mailing lists, issue tracking, mercurial repository: http://sfepy.org Home page: http://sfepy.kme.zcu.cz People who contributed to this release: Ondrej Certik, Ryan Krauss, Vladimir Lukes. Major improvements: - finite strain elasticity: neo-Hookean, Mooney-Rivlin materials in the total Lagrangian (TL) formulation - solving problems in complex numbers - generalized equations to allow linear combination of terms - run-time type of state term arguments - refactoring to follow Python coding style guidelines - new terms For more information on this release, see http://sfepy.googlecode.com/svn/web/releases/005000_RELEASE_NOTES.txt Best regards, Robert Cimrman

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large deformations
by Robert Cimrman Sept. 1, 2008

Sept. 1, 2008

Hi all, and Ryan in particular, I have started implementing large deformations into the code. Nothing is finished yet, but I have already some proof-of-concept. I will commit relatively soon (i.e. after my holidays) a patch adding the hyperelastic neo-Hookean material. Ultimately, I would like to have in SfePy all the functionality I had in its predecessor (a matlab code called mafest1), but it is a long term goal, as it was more a one-purpose tool than a general FE system. All that the old code can do is nicely summarized in my thesis, that you can find at http://ui505p06-mbs.ntc.zcu.cz/sfe/RobertCimrman at the bottom (thesis.pdf). Ryan, try to look in particular at Section 2.1.2 (TL formulation), Chapter 3 (FE discretization in TL context) and Chapter 6 (FE discretization in a linear problem context), as it may provide you some insight. Appendix A might be also interesting, as the usual constitutive (stress-strain) relations are summarized there, e.g. the neo-Hookean one. r.

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make sfepy usable a'la mathematica using sympy
by Ondrej Certik Sept. 1, 2008

Sept. 1, 2008

Hi, I'd like to be able to do these things with sfepy+sympy together: http://reference.wolfram.com/mathematica/tutorial/NDSolvePDE.html I.e. really just specify the equation in sympy and sfepy should be clever enough to solve it correctly, or say why it cannot solve it. Ondrej

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