Mailman 3 June 2014 - SfePy

Re: Torque
by Robert Cimrman 09 Mar '18

09 Mar '18

In examples/large_deformation/hyperelastic.py a rotation by displacements is applied. By using a similar function the vectors defining the force couples could be defined for dw_surface_ltr (IMHO). Does it make sense? r. ----- Reply message ----- From: "Andre Smit" <freev...(a)gmail.com> To: <sfepy...(a)googlegroups.com> Subject: Torque Date: Sat, Dec 18, 2010 05:10 What is the best way to apply a torque load to a model? -- Andre -- You received this message because you are subscribed to the Google Groups "sfepy-devel" group. To post to this group, send email to sfepy...(a)googlegroups.com. To unsubscribe from this group, send email to sfepy-devel...(a)googlegroups.com. For more options, visit this group at http://groups.google.com/group/sfepy-devel?hl=en.

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1D line elements in SfePy
by Nimish 22 Jan '16

22 Jan '16

I am currrently looking for FEM packages to help me solve a system of beams and columns, basically a collection of 1D bernoulli/timoshenko line elements. I started reading SfePy docs and i am getting the idea that doing the above is not really possible here, am i right? Are only 2D area elements permitted in SfePy? Or is there any direct support for solving 1D line elements too.. Cheers Nimish

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SfePy system-wide installation
by G.L. 27 Oct '14

27 Oct '14

Hi ! First of all, congratulation for this great piece of software ! I was trying to build and install SfePy system-wide (2014.1 or 2014.2), but ran into troubles. I followed the instructions on the website ("python setup.py build", then "python setup.py install"). There was no special error during the build (some warnings from gcc) or the installation. However, when I try to run the tests, nothing is working : > 79 test file(s) executed in 0.55 s, 92 failure(s) of 103 test(s) The errors are due to python that fails to import SfePy modules : ./run_tests.py --debug tests/test_cmesh.py > .... > .... > .... > File "tests/test_cmesh.py", line 96, in test_cmesh_counts > from sfepy.discrete.fem import Mesh > File "/scratch/packages/sfepy-2014.2/sfepy/discrete/__init__.py", line > 8, in <module> > from variables import Variables, Variable, FieldVariable, > create_adof_conns > File "/scratch/packages/sfepy-2014.2/sfepy/discrete/variables.py", line > 12, in <module> > import sfepy.linalg as la > File "/scratch/packages/sfepy-2014.2/sfepy/linalg/__init__.py", line 1, > in <module> > from extmods.crcm import rcm, permute_in_place > ImportError: No module named crcm I don't understant, because everything is installed in my /usr/local/lib/python2.7/ (I run an ubuntu 14.04) If I do an inplace build, everything works fine (but I really want to install SfePy system-wide...) I really don't know how to fix that... any idea ? Thank you very much ! G.

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Python 3 compatibility
by Robert Cimrman 11 Aug '14

11 Aug '14

FYI: As SciPy 0.12.0 is out and one of the release highlights is "Support for Python 2 and Python 3 from the same code base (no more 2to3)", we can think seriously about updating SfePy in this respect as well, cf. [1]. r. [1] https://github.com/sfepy/sfepy/issues/164

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Mac installation instructions
by Robert Cimrman 07 Jul '14

07 Jul '14

Hi, any Mac users here able to help with [1]? r. [1] https://github.com/sfepy/sfepy/issues/264

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k-epsilon turbulence model
by Matthew Dornfeld 28 Jun '14

28 Jun '14

Has anyone ever seen an implementation of the k-epsilon turbulence model in sfepy?

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Displacement Controlled Isotropic Elasticity Examples in 2D and 3D
by David Brough 24 Jun '14

24 Jun '14

Hello, I am using SfePy to compute the strain fields for an isotropic material in both 2D and 3D with displacement boundary conditions in the x boundaries and periodic boundary conditions on the other boundaries. The corners on the x line/plane are also fixed in all directions. Below are links to the files for both simulations. 3D https://github.com/PyMKS/pymks/blob/issue66-3Dexample/pymks/elasticFEModel3… 2D https://github.com/PyMKS/pymks/blob/issue66-3Dexample/pymks/elasticFEModel.… In both of these files, the displacements are currently being returned and not the strain. In both models, the displacements fields should run from 0.0 to 3.0 in the x-direction and be zero in the other direction(s). The 2D example gives the expected values, while the 3D example does not. Below are the displacements of one row of vertices in each of the directions. 2D x - displacement [[ 0. 1. 2. 3.]] y - displacement [[ 0.00000000e+00 -1.87759988e-15 -2.87436852e-15 -3.24740235e-15]] 3D x - displacement [[ 0. 4.2962163 5.88616087 3.]] y - displacement [[ 0. 13.22615623 13.19390252 24.60315355]] z - displacement [[ 0. 11.78213038 11.78213038 16.76530931]] Any thoughts? Do I have the periodic boundary conditions correct or do I need to do something similar to what was suggested in this post https://groups.google.com/forum/#!topic/sfepy-devel/VpVHXS7Jh0Q, but in 3D? Thanks, David

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material_#
by Matthew Dornfeld 23 Jun '14

23 Jun '14

Can someone tell me the difference between the dicts materials and material_1, material_2? I see references to all those in the examples, but I'm not sure what the differences are.

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error from solve_pde(’its2D_2.py’) of running sfepy in interactive mode
by Ouyang 17 Jun '14

17 Jun '14

Hi all, I am new in sfepy. I have installed sfepy in my window 8 with python(x,y) 2.7.6.0 successfully and tested all examples. Everything is fine with that. But, as the subject indicated, I got errors when running solve_pde(’its2D_2.py’) of in interactive mode of ipython(sh). I follow the instructions at http://sfepy.org/doc-devel/installation.html#using-ipython to customize ipython. When I followed the instruction from 4.5.1 Running Sfepy in interactive mode to run "pb, state = solve_pde(’its2D_2.py’)" , I got the error: "ImportError: no module named its2D_2" as shown in the figure below. Any ideas? Thanks very much in advance. My system is window 8 and python(x,y) installed is 2.7.6.0 with packages of pyparsing-2.0.2.win32-py2.7,umfpackpy_0.2 and msysGit-netinstall-1.9.2. I install sfepy at C:/sfepy/ using git bash: git clone git://github.com/sfepy/sfepy.git Ouyang

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Displaced periodic boundary condition
by Daniel Wheeler 13 Jun '14

13 Jun '14

Hi, I'm trying to figure out how to apply a periodic boundary condition with a displacement (or a displaced periodic boundary condition). For example I'd like to have a periodic boundary condition linking the left side of the domain with the right side of the domain so that x_left = x_right + displacement A regular periodic boundary condition would just be "x_left = x_right". Is it as simple as modifying PeriodicBC('periodic_y', [region_up, region_down], {'u.all' : 'u.all'}, match='match_x_line') in some way? Thanks. -- Daniel Wheeler

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IGA code speed-up
by Robert Cimrman 11 Jun '14

11 Jun '14

FYI: I have just (re)implemented some IGA-related routines in C, so the (still preliminary) isogeometric analysis code should be practically usable now - it is merged in our master repository. r.

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