SfePy December 2020

sfepy@python.org

3 participants
7 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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ANN: SfePy 2020.4
by Robert Cimrman 27 Dec '20

27 Dec '20

I am pleased to announce the release of SfePy 2020.4. Description ----------- SfePy (simple finite elements in Python) is a software for solving systems of coupled partial differential equations by finite element methods. It is distributed under the new BSD license. Home page: https://sfepy.org Mailing list: https://mail.python.org/mm3/mailman3/lists/sfepy.python.org/ Git (source) repository, issue tracker: https://github.com/sfepy/sfepy Highlights of this release -------------------------- - Ogden hyperelastic term - serendipity finite element basis of orders 1-3 For full release notes see [1]. Cheers, Robert Cimrman [1] http://docs.sfepy.org/doc/release_notes.html#id1 --- Contributors to this release in alphabetical order: Robert Cimrman Jan Heczko Vladimir Lukes

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Re: Development help
by Robert Cimrman 12 Dec '20

12 Dec '20

Hi Mike, You need to either generate the mesh using the simple mesh generators that are in the sfepy package (just block or cylinder meshes), or (most often) you need to provide a mesh file, created in advance in an external tool. Many open-source or commercial softwares can be used for meshing. The following formats are supported thanks to meshio package: $ python3 script/convert_mesh.py -l a b sfepy: Supported readable mesh formats: sfepy: -------------------------------- sfepy: abaqus (.inp) sfepy: ansys (.cdb) sfepy: comsol (.txt) sfepy: exodus (['.ex2', '.e', '.exo']) sfepy: gambit (.neu) sfepy: gmsh (.msh) sfepy: gmsh-dg (.msh) sfepy: gmsh2-ascii (.msh) sfepy: gmsh2-binary (.msh) sfepy: gmsh4-ascii (.msh) sfepy: gmsh4-binary (.msh) sfepy: hdf5 (.h5) sfepy: hdf5-xdmf (.h5x) sfepy: hmascii (.hmascii) sfepy: med (.med) sfepy: medit (['.mesh', '.meshb']) sfepy: mesh3d (.mesh3d) sfepy: nastran (['.nas', '.fem', '.bdf']) sfepy: tetgen (['.node', '.ele']) sfepy: vtk (.vtk) sfepy: vtk-ascii (.vtk) sfepy: vtk-binary (.vtk) sfepy: vtu (.vtu) sfepy: xdmf (['.xmf', '.xdmf']) sfepy: xyz (.xyz) sfepy: sfepy: Supported writable mesh formats: sfepy: -------------------------------- sfepy: abaqus (.inp) sfepy: exodus (['.ex2', '.e', '.exo']) sfepy: gmsh (.msh) sfepy: gmsh-dg (.msh) sfepy: gmsh2-ascii (.msh) sfepy: gmsh2-binary (.msh) sfepy: gmsh4-ascii (.msh) sfepy: gmsh4-binary (.msh) sfepy: hdf5 (.h5) sfepy: hdf5-xdmf (.h5x) sfepy: med (.med) sfepy: medit (['.mesh', '.meshb']) sfepy: nastran (['.nas', '.fem', '.bdf']) sfepy: tetgen (['.node', '.ele']) sfepy: vtk (.vtk) sfepy: vtk-ascii (.vtk) sfepy: vtk-binary (.vtk) sfepy: vtu (.vtu) sfepy: xdmf (['.xmf', '.xdmf']) sfepy: xyz (.xyz) Does it help? r. On 10. 12. 20 20:53, Michael Rizzo wrote: > Yea that one managed to work, and I made sure to change to the correct > directory. I fact, it seems I had already done this, but I was unable to > notice the importance of another error, which seems to relate to a mesh > that is no longer available in the standard sfepy build: > [image: image.png] > > I am new to FEA, but I do have some experience using ANSYS, where we > usually start with the geometry and then figure out the mesh. In this case > it seems I am not familiar enough to understand how to setup the mesh at > present. > > Regards, > Mike > > On Wed, 9 Dec 2020 at 16:02, Robert Cimrman <cimrman3(a)ntc.zcu.cz> wrote: > >> OK, so is fish_heart.py in your working directory? And how did you install >> sfepy (which version)? >> >> Anyway, maybe start with the example [1], which is up-to-date and simpler. >> >> r. >> >> [1] >> http://sfepy.org/doc-devel/examples/large_deformation-active_fibres.html >> >> On 09. 12. 20 21:45, Michael Rizzo wrote: >>> Yea I am trying to use a module custom built by this other group for >> now. I >>> am trying the way indicated in the manual: >>> >>> [image: image.png] >>> >>> I can also take a look at some more recent description files. >>> >>> On Wed, 9 Dec 2020 at 15:32, Robert Cimrman <cimrman3(a)ntc.zcu.cz> wrote: >>> >>>> Can you post how you run the example module? >>>> >>>> If it is the file from [1], note that it is already 10 years old, so it >>>> likely >>>> needs updating for current sfepy. >>>> >>>> Regards, >>>> r. >>>> >>>> [1] http://sfepy.org/fish_heart/ >>>> >>>> On 09. 12. 20 18:42, Michael Rizzo wrote: >>>>> Okay. I am working in colaboratory for now. I am able to pip install >>>>> sfepy, but when I try to use a custom module I am running into path >>>> issues. >>>>> >>>>> [image: image.png] >>>>> >>>>> I have been able to append the module to path using sys.append, and I >>>> have >>>>> also added the module to the examples folder. It seems like I may need >> to >>>>> rebuild and run the make again, however. >>>>> >>>>> I appreciated the assistance. >>>>> >>>>> Regards, >>>>> Mike >>>>> >>>>> On Wed, 9 Dec 2020 at 11:44, Robert Cimrman <cimrman3(a)ntc.zcu.cz> >> wrote: >>>>> >>>>>> Hi Mike, >>>>>> >>>>>> On 12/9/20 5:24 PM, Michael Rizzo wrote: >>>>>>> Hello SFE folk, >>>>>>> >>>>>>> I am new to development. Is this the appropriate contact for question >>>>>>> asking? If not, a redirect would be appreciated. >>>>>> >>>>>> Yes, ask here! >>>>>> >>>>>> Cheers, >>>>>> r. >>>>>> >>>>>>> Regards, >>>>>>> Mike >> _______________________________________________ >> SfePy mailing list -- sfepy(a)python.org >> To unsubscribe send an email to sfepy-leave(a)python.org >> https://mail.python.org/mailman3/lists/sfepy.python.org/ >> Member address: mdrizzzoh(a)gmail.com >> >

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Re: Development help
by Robert Cimrman 09 Dec '20

09 Dec '20

OK, so is fish_heart.py in your working directory? And how did you install sfepy (which version)? Anyway, maybe start with the example [1], which is up-to-date and simpler. r. [1] http://sfepy.org/doc-devel/examples/large_deformation-active_fibres.html On 09. 12. 20 21:45, Michael Rizzo wrote: > Yea I am trying to use a module custom built by this other group for now. I > am trying the way indicated in the manual: > > [image: image.png] > > I can also take a look at some more recent description files. > > On Wed, 9 Dec 2020 at 15:32, Robert Cimrman <cimrman3(a)ntc.zcu.cz> wrote: > >> Can you post how you run the example module? >> >> If it is the file from [1], note that it is already 10 years old, so it >> likely >> needs updating for current sfepy. >> >> Regards, >> r. >> >> [1] http://sfepy.org/fish_heart/ >> >> On 09. 12. 20 18:42, Michael Rizzo wrote: >>> Okay. I am working in colaboratory for now. I am able to pip install >>> sfepy, but when I try to use a custom module I am running into path >> issues. >>> >>> [image: image.png] >>> >>> I have been able to append the module to path using sys.append, and I >> have >>> also added the module to the examples folder. It seems like I may need to >>> rebuild and run the make again, however. >>> >>> I appreciated the assistance. >>> >>> Regards, >>> Mike >>> >>> On Wed, 9 Dec 2020 at 11:44, Robert Cimrman <cimrman3(a)ntc.zcu.cz> wrote: >>> >>>> Hi Mike, >>>> >>>> On 12/9/20 5:24 PM, Michael Rizzo wrote: >>>>> Hello SFE folk, >>>>> >>>>> I am new to development. Is this the appropriate contact for question >>>>> asking? If not, a redirect would be appreciated. >>>> >>>> Yes, ask here! >>>> >>>> Cheers, >>>> r. >>>> >>>>> Regards, >>>>> Mike

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Re: Development help
by Robert Cimrman 09 Dec '20

09 Dec '20

Can you post how you run the example module? If it is the file from [1], note that it is already 10 years old, so it likely needs updating for current sfepy. Regards, r. [1] http://sfepy.org/fish_heart/ On 09. 12. 20 18:42, Michael Rizzo wrote: > Okay. I am working in colaboratory for now. I am able to pip install > sfepy, but when I try to use a custom module I am running into path issues. > > [image: image.png] > > I have been able to append the module to path using sys.append, and I have > also added the module to the examples folder. It seems like I may need to > rebuild and run the make again, however. > > I appreciated the assistance. > > Regards, > Mike > > On Wed, 9 Dec 2020 at 11:44, Robert Cimrman <cimrman3(a)ntc.zcu.cz> wrote: > >> Hi Mike, >> >> On 12/9/20 5:24 PM, Michael Rizzo wrote: >>> Hello SFE folk, >>> >>> I am new to development. Is this the appropriate contact for question >>> asking? If not, a redirect would be appreciated. >> >> Yes, ask here! >> >> Cheers, >> r. >> >>> Regards, >>> Mike >> _______________________________________________ >> SfePy mailing list -- sfepy(a)python.org >> To unsubscribe send an email to sfepy-leave(a)python.org >> https://mail.python.org/mailman3/lists/sfepy.python.org/ >> Member address: mdrizzzoh(a)gmail.com >> >

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Development help
by Michael Rizzo 09 Dec '20

09 Dec '20

Hello SFE folk, I am new to development. Is this the appropriate contact for question asking? If not, a redirect would be appreciated. Regards, Mike

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export as audio soundfile (vtk to audiofile for instance)
by Olivier Pasquet 09 Dec '20

09 Dec '20

Hello ! Is there a way to export data as a audio sound-file ? At least the kind that could Work ? For instance, acoustics3d.py or vibro_acoustic3d.py could export vtk file that could then be converted into a wav or aiff one ? Is there any example somewhere ? Thanks !! O.

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SfePy December 2020