[Numpy-discussion] ANN: SfePy 2013.3

[Robert Cimrman]

I am pleased to announce release 2013.3 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
--
- implementation of Mesh topology data structures in C
- implementation of regions based on C Mesh (*)
- MultiProblem solver for conjugate solution of subproblems
- new advanced examples (vibro-acoustics, Stokes flow with slip conditions)

(*) Warning: region selection syntax has been changed in a principal way,
see [1]. Besides the simple renaming, all regions meant for boundary conditions
or boundary/surface integrals need to have their kind set explicitly to 'facet'
(or 'edge' in 2D, 'face' in 3D).

[1] http://sfepy.org/doc-devel/users_guide.html#regions

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
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Re: [Numpy-discussion] ANN: SfePy 2013.3

[Robert Cimrman]

Dear Josè,

On 09/18/2013 07:10 PM, Josè Luis Mietta wrote:
 Dear Robert.

 Im intresting in modeling mechanical deformation of magnetorheological
 elastomers (material formed by inorganic chains inserting in a polymeric
 matrix -see figure 2 in the attached file-). The inorganic chais are like
 pearl necklace (are formed by saligned pheres ).

 Can I use this tool (SfePy) for modeling the mechanical deformation (i.e.:
 shape deformation by appling a force in longitudinal and transversal
 direction respect to the inorganic chains)?

I guess so :) You are interested in modeling a single chain, not the whole 
microstructure, right? (BTW. if you are interested in modeling the whole box 
with many chains, check [1]).

 How can I do that?

These are general steps, not particular to sfepy:

First you need to create a FE mesh out of the CT data. There are probably many 
packages that can do that. I am familiar (and know it works) with [2], which 
has been created by Vladimir Lukes, another sfepy developer.

Then you need to define the problem - specify boundary conditions, choose FE 
approximation, apply loads and finally solve and visualize.

 Im a newby user of python and I dont know anything about simple finite
 elements analysis. What documentation (books or other) do yo recommend for
 my introduction in this topic?

Check the wiki page [3] and possibly the references given there.

If you have other questions, we can discuss off-list, or on the sfepy mailing 
list [4].

Best regards,
r.

[1] http://parfe.sourceforge.net/
[2] http://sfepy.org/dicom2fem/
[3] http://en.wikipedia.org/wiki/Finite_element_method
[4] https://groups.google.com/forum/#!forum/sfepy-devel
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