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?
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From: "Andre Smit" <freev...(a)gmail.com>
Date: Sat, Dec 18, 2010 05:10
What is the best way to apply a torque load to a model?
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I am currrently looking for FEM packages to help me solve a system of
beams and columns, basically a collection of 1D bernoulli/timoshenko
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..
I'm working on modeling a next-generation X-ray mirror for which the
shape can be actively controlled by use of many thin piezo-electric
actuators mounted on the mirror surface. The mirror is basically a
glass conical paraboloid with a 1 meter radius and 200 micron
thickness (e.g. http://en.wikipedia.org/wiki/X-ray_optics). Our
project is currently using a proprietary FEA package, but the model
setup and turnaround time is slow, in part because there is only one
part-time engineer who can run it.
SfePy looks like a great package and we're hoping that it could be
used to automate running a large number of different cases. I've
spent some time reading the documentation but I have a few questions
that I hope can be answered before going too much further. I want to
apologize in advance if some of my wording is imprecise, I have a
physics background but this topic is a bit outside my realm...
- Is SfePy appropriate for this problem?
- If a specify a grid with about 800 x 400 points (azimuthal, axial)
and about 10 boundary conditions (corresponding to mount points), what
is the rough order of magnitude of time to compute the solution? Is
it seconds, minutes, hours, or days?
- The linear elastic examples show a problem with a specified
displacement. How do I specify an input force? The piezo essentially
provides a tensile force along the surface.
- Is there a way to specify the problem and solve in cylindrical
coordinates? This is the natural coordinate system.
- How do I specify 6-DOF constraints which correspond to the mirror
Thanks in advance for any help!
I am pleased to announce release 2012.2 of SfePy.
SfePy (simple finite elements in Python) is a software for solving
systems of coupled partial differential equations by the finite element
method. The code is based on NumPy and SciPy packages. It is distributed
under the new BSD license.
Home page: http://sfepy.org
Downloads, mailing list, wiki: http://code.google.com/p/sfepy/
Git (source) repository, issue tracker: http://github.com/sfepy
Highlights of this release
- reimplemented acoustic band gaps code using the homogenization engine
- high order quadrature rules
- unified dot product and mass terms, lots of other term updates/fixes,
- updated the PDE solver application
For full release notes see http://docs.sfepy.org/doc/release_notes.html#id1
(rather long and technical).
Robert Cimrman and Contributors (*)
(*) Contributors to this release (alphabetical order):
Vladimír Lukeš, Andre Smit
License: "The academic version of EPD is a fully functional installation of
the software that can be used indefinitely by students and employees at
So I guess we all can use it from the below link-
when giving the final build command, the following error shows-
$ python setup.py build_ext --inplace --compiler=mingw32
Traceback (most recent call last):
File "setup.py", line 104, in <module>
File "c:\sfepy\build_helpers.py", line 311, in package_check
raise RuntimeError(msgs['missing'] % pkg_name)
RuntimeError: Cannot import package "tables" - is it installed?
But pytable is installed.