SfePy October 2015

sfepy@python.org

4 participants
8 discussions

by Robert Cimrman

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.

3 years, 10 months

new interactive example with time stepping

by Robert Cimrman

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

4 years, 10 months

1D line elements in SfePy

by Nimish

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

6 years

cannot set toolkit to wx because it has already been set to qt4

by silesa...＠hotmail.com

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

6 years, 1 month

Modelling viscoelasticity

by Patricia Garcia Cañadilla

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 :)

6 years, 2 months

Ipython, python fails to to import Viewer

by silesa...＠hotmail.com

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.

6 years, 3 months

Symbolic computation of a finite element

by Enzo Garofalo

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.

6 years, 3 months

new example with new linear combination BCs

by Robert Cimrman

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

6 years, 4 months

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SfePy October 2015