SfePy October 2015

sfepy@python.org

4 participants
9 discussions

Material Parameters of Individual Nodes
by derj...＠web.de 12 Apr '22

12 Apr '22

Hello! It's a great tool you built there! I'd like to use it for some kind of topology optimisation. Is there an "idiomatic" way to set the material parameters of individual nodes? Thank you very much! JonnyB

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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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new interactive example with time stepping
by Robert Cimrman 13 Mar '17

13 Mar '17

Hi, I have just updated the time stepping solvers in sfepy for interactive use, as demonstrated in the new example [1]. For basic use, ignore the probing code - the time stepper can be used as simply as: tss = SimpleTimeSteppingSolver({'t0' : 0.0, 't1' : 100.0, 'n_step' : 11}, problem=problem) tss.init_time() for step, time, state in tss(): pass r. [1] http://sfepy.org/doc-devel/examples/diffusion/time_poisson_interactive.html

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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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cannot set toolkit to wx because it has already been set to qt4
by silesa...＠hotmail.com 16 Dec '15

16 Dec '15

I have made an inline instalation of sfepy-2013.3 on fedora22 , I run the tests and I have only 3 failed, they maybe related to the parallel option since I don't have instaled that option. I have python 2.7.10, mayavi 4.4.3, VTK 6.1.0, Qt 4.8.6 Either on the python or ipython window when I try to import: *from sfepy.postprocess.viewer import Viewe*r I get the following message, *cannot set toolkit to wx because it has already been set to qt4* and of course any postprocessing will fail

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Modelling viscoelasticity
by Patricia Garcia Cañadilla 06 Nov '15

06 Nov '15

Dear Robert, I would like to the model the viscoelastic behavior of active fibers, as you done in the paper: "Modelling heart tissue using a composite muscle model with blood perfusion" or as here: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.488.5795&rep=rep1&… and I was wondering if is easy to implemented in sfepy and/or if there is some predefined term in Sfepy, since for example the term "dw_tl_fib_a" doesn't include the "exp{k min(0;de/dt}}" that appears in the paper. Thank you very much for your help :)

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Ipython, python fails to to import Viewer
by silesa...＠hotmail.com 29 Oct '15

29 Oct '15

I have installed sfepy 2015.3 on python 2.7.10, mayavi 4.4.3, VTK 6.1.0 and Qt 4.8.6 All but three tests not related to viewer have passed. On the python or ipython windows when I try to import: from sfepy.postprocess.viewer import Viewer I get the following message: /usr/lib/python2.7/site-packages/traits/etsconfig/etsconfig.pyc in _set_too lkit(self, toolkit) 211 if self._toolkit and self._toolkit != toolkit: 212 raise ValueError, "cannot set toolkit to %s because it has "\ --> 213 "already been set to %s" % (toolkit, se lf._toolkit) 214 215 self._toolkit = toolkit ValueError: cannot set toolkit to wx because it has already been set to qt4 can somebody help with this problem?. I am new with sfepy.

2 1

Symbolic computation of a finite element
by Enzo Garofalo 05 Oct '15

05 Oct '15

Hello everyone, I desire to implement my own finite element, where I made a semi-analytical integration. Using symbolic computation symbolic expressions were found to determine the components of the stiffness matrix. This analytical integration is much more efficient at run time compared with calculations by numerical integration. However, I have been looking for ways to edit the way to calculate the stiffness matrix is made and find nothing. That is, I do not find how to edit the way that this matrix is evaluated. Immensely grateful if someone could guide me to edit files. Or at least see if I can or can not do that edition. Thanks in advance.

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new example with new linear combination BCs
by Robert Cimrman 01 Oct '15

01 Oct '15

FYI: http://sfepy.org/doc-devel/examples/linear_elasticity/nodal_lcbcs.html Current git master version is required to run it. r.

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SfePy October 2015