Re: Torque
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
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1 year, 1 month
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
3 years, 2 months
SfePy system-wide installation
by G.L.
Hi !
First of all, congratulation for this great piece of software !
I was trying to build and install SfePy system-wide (2014.1 or 2014.2), but
ran into troubles. I followed the instructions on the website ("python
setup.py build", then "python setup.py install").
There was no special error during the build (some warnings from gcc) or the
installation.
However, when I try to run the tests, nothing is working :
> 79 test file(s) executed in 0.55 s, 92 failure(s) of 103 test(s)
The errors are due to python that fails to import SfePy modules :
./run_tests.py --debug tests/test_cmesh.py
> ....
> ....
> ....
> File "tests/test_cmesh.py", line 96, in test_cmesh_counts
> from sfepy.discrete.fem import Mesh
> File "/scratch/packages/sfepy-2014.2/sfepy/discrete/__init__.py", line
> 8, in <module>
> from variables import Variables, Variable, FieldVariable,
> create_adof_conns
> File "/scratch/packages/sfepy-2014.2/sfepy/discrete/variables.py", line
> 12, in <module>
> import sfepy.linalg as la
> File "/scratch/packages/sfepy-2014.2/sfepy/linalg/__init__.py", line 1,
> in <module>
> from extmods.crcm import rcm, permute_in_place
> ImportError: No module named crcm
I don't understant, because everything is installed in my
/usr/local/lib/python2.7/
(I run an ubuntu 14.04)
If I do an inplace build, everything works fine (but I really want to
install SfePy system-wide...)
I really don't know how to fix that... any idea ?
Thank you very much !
G.
4 years, 5 months
Software for viewing 3d meshes
by Matthew Dornfeld
Anyone know good software for viewing 3d .mesh files? I tried python mesh
viewer, but it only seems to work for 2d examples.
4 years, 7 months
Convective boundary condition
by Geoff Wright
Hi,
I'm trying to use sfepy to model the temperature distribution at steady
state, where theres a heat source, conduction through a solid, and
convection across a solid/liquid interface. Struggling with the convection
part... I've been doing some reading and I think I need to enforce a
convective boundary condition, sometimes known as a robin boundary
condition. This would add a term where you integrate the temperature of
the liquid across the interface surface. Does this sound right? Are there
any examples of doing something like this?
Thanks,
Geoff
4 years, 8 months
How to compute energy density from electric field
by Geoff Wright
Hi Robert,
Me again :) but I think this one is easy... in the previous thread about
flux I was computing electric field from voltage in the post processing
step. I would like to compute energy density also, from electric field. I
believe its something like this, in the post_process hook:
# compute the electric field
electric_field = pb.evaluate('ev_grad.i1.Omega( v )', mode='el_avg')
electric_field *= -1.0
out['electric_field'] = Struct(name='Electric field', mode='cell',
data=electric_field, dofs=None)
# compute the energy density
energy_density = pb.evaluate('dw_volume_dot.i1.Omega(p.sigma, ef, ef)',
ef=electric_field)
out['energy_density'] = Struct(name='Energy density', mode='cell',
data=energy_density, dofs=None)
However, I get an error when its parsing the variables. How do I specify
ef variable properly? I attached the relevant files in case its necessary.
Thank you,
Geoff
4 years, 8 months
