#204 Use of python libraries for material property laws compiled with python interfaces

[Rémi Coustal]

Hello Thomas,

I've tried to use python libraries in mfront to get some information from the .so, generated from a material property law.
I think the useful libraries are in tfel.system (in particular ExternalLibraryManager) but i don't find tutorials or any documentation about how to use in python these libraries...
Have you got any examples of these libraries' use ?
Thank you for your future answer and obviously for MFront in general.

Rémi Coustal

Mechanical engineer
Ceramic, Accidental and Modeling
Fuel Framatome

[Helfer Thomas]

Hi Rémi,

Indeed, the class ExternalLibraryManager is the main entry point to read metadata about generated material properties. However, this class is not very handy .

The ExternalMaterialPropertyDescription class can be more usefull in many cases, although far less developped than the ExternalBehaviourDescription class.

Here is an example:

from tfel.system import ExternalMaterialPropertyDescription
mp = ExternalMaterialPropertyDescription('src/libCyranoInconel600.so',
                                         'Inconel600_YoungModulus')
print(mp.arguments)

One may have a look at the C++ implementation to see which feature of the ExternalLibraryManager are used:

      this->tfel_version = elm.getTFELVersion(l, f);
      this->build_id = elm.getBuildId(l, f);
      this->source = elm.getSource(l, f);
      this->mfront_interface = elm.getInterface(l, f);
      this->arguments = elm.getMaterialPropertyVariables(l, f);

Thomas

[Helfer Thomas]

Hi Rémi,
just started this page http://tfel.sourceforge.net/TFELSystem.html
Let us close this ticket when this page is finished, ok ?
Thomas

[Rémi Coustal]

Hi Thomas,
Thank you for the doc page, i'm sure it will be useful !
I let you close the ticket when the page is completed.
Rémi

[Helfer Thomas]

Great, let us this ticket to discuss what is missing/not documented.

[Helfer Thomas]

@rcoustal What shall we do with this ticket ?