FEM tutorial/es

Introducción
Este tutorial tiene como propósito el introducir al lector a la forma de trabajo básica del módulo FEM, así como a la mayoría de las herramientas disponibles para realizar un análisis estático.



Requisitos

 * FreeCAD versión 0.16 superior
 * Netgen y/o GMSH está instalado en el sistema
 * Para el caso de GMSH, se recomienda instalar el macro de psicofil's macro
 * Calculix está instalado en el sistema
 * El lector tiene el conocimiento básico para utilizar los módulo Part y PartDesign

Modelado
En este ejemplo un Cubo es utilizado como objeto de estudio, pero modelos creados en los bancos de trabajo Parte y Diseño de Parte pueden ser utilizados en su lugar.


 * 1) Crear un nuevo documento
 * 2) Activar el módulo Part
 * 3) Crear un Cubo
 * 4) Cambiar sus Dimensiones a las siguientes:
 * 5) Altura:  1.000 mm
 * 6) Longitud: 8.000 mm
 * 7) Ancho: 1.000 mm

Ahora tenemos un modelo con el que se puede trabajar.

Netgen

 * 1) Select the model
 * 2) Click [[Image:Fem_Analysis.svg|32px]] New mechanical analysis from the menu to create an analysis from the object that was selected
 * 3) In the meshing dialog, click OK

You can also drag and drop a mesh to a Mechanical Analysis that does not have a mesh within the Tree View.

GMSH
The usage of psicofil's macro is recommended, and is used for this example.
 * 1) Activate the macro
 * 2) Select the object you wish to use, in this case our Cube
 * 3) Check the box Create Mechanical Analysis from mesh
 * 4) Click OK

We have now meshed our object and are ready to add constraints and forces.

Constraints and Forces

 * 1) Hide the mesh from the Tree View.
 * 2) Show the original model
 * 3) Select [[Image:Fem_ConstraintFixed.svg|32px]] Create FEM fixed constraint
 * 4) Select the back face of the Cube (face on the YZ axis) and click OK
 * 5) Select  [[Image:Fem_ConstraintForce.svg|32px]] Create FEM force constraint
 * 6) Select the front face of the Cube (the face parallel to the back face) and set the Area load  value to 9000000.00
 * 7) Set the Direction to -Z by selecting one of the face edges parallel to that direction.
 * 8) Click OK

We now have established the restrictions and forces for our static study.

Final preparations

 * 1) Select [[Image:Fem_Material.svg|32px]] Mechanical material... and choose Calculix as the material
 * 2) Click OK

Standard Procedure

 * 1) Select the solver object [[Image:Fem_Solver.svg|32px]] contained in the Mechanical Analysis
 * 2) Select [[Image:Fem_NewAnalysis.svg|32px]] Start calculation from the menu
 * 3) Select Write Calculix Input File
 * 4) Select Run Calculix
 * 5) Click Close

Quick Procedure

 * 1) Select the solver object [[Image:Fem_Solver.svg|32px]] contained in the Mechanical Analysis
 * 2) Click on [[Image:Fem_QuickAnalysis.svg|32px]] Quick Analysis.

Analyzing Results

 * 1) From the Object Tree, select the Results object
 * 2) Select [[Image:Fem_Result.svg|32px]] Show result
 * 3) Choose among the different Result types to view the results
 * 4) The slider at the bottom can be used to alter the mesh visualization. This allows us to visualize the deformation experienced by  the object, keep in mind that this is an approximation.
 * 5) To remove the results select [[Image:Fem_PurgeResults.png|32px]] Purge results

We are now finished with the basic workflow for the FEM Module.