Mailman 3 July 2020 - SfePy

Material Parameters of Individual Nodes
by derj...＠web.de 11 Apr '22

11 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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Query on sfepy for Finite element analysis
by Aanchal Jasuja 03 Aug '20

03 Aug '20

Hello, We are trying to use sfepy for FEM analysis. However, we have a couple of queries about sfepy. 1. We couldn't find any examples for 1-D line element modelling, although it says so in the description. Can sfepy be used for it or just for plates & shells? 2. According to the manual, the outputs are in the form of stresses & strains. Is there any possible way to directly get results in the form of bending moment, shear force, reactions etc. ? We would really appreciate your support response at the earliest convenience. Thank you Regards Aanchal Jasuja

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trying to create animation (following documentation)
by francoisbrest＠hotmail.fr 05 Jul '20

05 Jul '20

Hello, I am trying to reproduce an example from the documentation to create an animation. (Windows10, Anaconda python 3.6.10 h9f7ef89_2, sfepy 2020.2 py36h7725771_0 conda-forge) Inside a Jupyter-notebook, I have done: !copy c:\ProgramData\Anaconda3\lib\site-packages\sfepy\examples\diffusion\time_poisson.py . !c:\ProgramData\Anaconda3\python.exe c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\simple.py time_poisson.py -s #everything OK #I can view each individual vtk #But I cannot create the animation !c:\ProgramData\Anaconda3\python.exe c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py c:\ProgramData\Anaconda3\Scripts\NOTEBOOKS\cylinder.??.vtk -a mov Traceback (most recent call last): File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py", line 513, in <module> main() File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py", line 503, in main view = view_file(filenames, filter_names, options) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py", line 281, in view_file domain_specific=options.domain_specific) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\postprocess\viewer.py", line 919, in call_mlab offscreen=self.offscreen) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\postprocess\sources.py", line 68, in create_file_source return GenericFileSource(filename, **kwargs) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\postprocess\sources.py", line 212, in __init__ self.read_common(self.filename) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\postprocess\sources.py", line 218, in read_common self.mesh = Mesh.from_file(filename) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\discrete\fem\mesh.py", line 220, in from_file mesh = io.read(mesh, omit_facets=omit_facets) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\discrete\fem\meshio.py", line 535, in read fd = open(self.filename, 'r') OSError: [Errno 22] Invalid argument: 'c:\\ProgramData\\Anaconda3\\Scripts\\NOTEBOOKS\\cylinder.??.vtk' #Same problem with (remplacing ?? by *) !c:\ProgramData\Anaconda3\python.exe c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py c:\ProgramData\Anaconda3\Scripts\NOTEBOOKS\cylinder.*.vtk -a mov #N.B. Python has no problem to find ffmpeg !ffmpeg -help #is OK #same problem when I run the command from the terminal (cmd window) c:\ProgramData\Anaconda3\python.exe c:\ProgramData\Anaconda3\lib\site-packages\sfepy\script\postproc.py c:\ProgramData\Anaconda3\Scripts\NOTEBOOKS\cylinder.*.vtk -a mov *meshio.py, line 535, fd = open(self.filename, 'r') does not want to open self.filename; there is a problem with the generic filename extraction ?* Any help appreciated. F.K. P.S. Of course, when I run python postproc.py -a mov on a specific file (say cylinder.00.vtk), I get an error: File "postproc.py", line 508, in main view.save_animation(options.filename) File "c:\ProgramData\Anaconda3\lib\site-packages\sfepy\postprocess\viewer.py", line 345, in save_animation self.set_step.step = step AttributeError: 'Viewer' object has no attribute 'set_step'

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