SfePy May 2012

sfepy@python.org

3 participants
7 discussions

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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Modeling an adjustable X-ray optic
by Tom Aldcroft 21 May '13

21 May '13

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 mounts? Thanks in advance for any help! Tom Aldcroft

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ANN: SfePy 2012.2
by Robert Cimrman 29 May '12

29 May '12

I am pleased to announce release 2012.2 of SfePy. Description ----------- 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). Best regards, Robert Cimrman and Contributors (*) (*) Contributors to this release (alphabetical order): Vladimír Lukeš, Andre Smit

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any outstanding issues?
by Robert Cimrman 28 May '12

28 May '12

Hi, I would like to make another regular release soon - are there any outstanding issues, besides those in our issue tracker? r.

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EPD 7.3 full version (Academic use license)
by Md. Golam Rashed 25 May '12

25 May '12

License: "The academic version of EPD is a fully functional installation of the software that can be used indefinitely by students and employees at degree-granting institutions." So I guess we all can use it from the below link- http://download.enthought.com/epd_7.3/

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Python(x,y)-2.7.2.2 installation problem
by Md. Golam Rashed 11 May '12

11 May '12

when giving the final build command, the following error shows- rashed@RASHED-PC /c/sfepy $ python setup.py build_ext --inplace --compiler=mingw32 Traceback (most recent call last): File "setup.py", line 104, in <module> package_check('tables', INFO.PYTABLES_MIN_VERSION) 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.

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SfePy May 2012