Metafor

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====== How to build my own FE model? ======

<note important>This page is under construction. Please refer to {{ :teaching:private:tutorial.pdf |}}  for up-to-date information</note>

{{:doc:user:ico-worker.png?40 |Under construction}}
Crushing of a block made of steel by a cylindrical punch

{{:doc:user:tutorials:crushing.png|}}

What is written in the file tutorial1.py ?

  * An input file of Metafor is a python module which contains a function getMetafor(p)
  * This function is supposed to create a Metafor object
  * The Metafor object is the main object containing everything about a FE simulation (geometry, mesh, boundary conditions, materials, integration scheme, etc.)

{{:doc:user:tutorials:getmetafor.png|}}


Main idea:
The input file creates a complete data structure and returns it to the FE code

Data structure of a model

{{:doc:user:tutorials:datastructure.png|}}

First lines – header of the file

<code>
# -*- coding: latin-1; -*-
# $Id: tutorial1.py 1875 2014-01-02 10:10:56Z boman $
########################################
#   tutorial 1                         #
#--------------------------------------#
#   geometrie 2D etat plan defo        #
#   materiau elastoviscoplastique      #
#           a écrouissage isotrope     #
#   definition outil                   #
#   contact rigide-defo collant        #
#   archivage + visu courbes           #
########################################
# Tutorial

from wrap import *
import math
</code>


  * coding:latin1 is required for French accentuated characters
  * miscellaneous comments
  * import the C++/python interface of the program (remember the wrap folder in the installation tree)
  * import the math module of python for later use

<code>
metafor = Metafor()
domain = metafor.getDomain()

def getMetafor(p={}): return metafor
</code>
{{ :doc:user:tutorials:datastr01.png|At that point, the data structure simply looks like this}}
Creation of an instance of the Metafor class
(for now it is almost empty)
We name it metafor

Any Metafor object contains a Domain object.
We retreive the Domain and we name it domain

We define the getMetafor() function (same for all models)