FEM tutorial/ro: Difference between revisions
(Created page with "=== Introducere === Acest tutorial are rolul de a introduce cititorul în fluxul de lucru de bază al Atelierului MEF, precum și majoritatea instrumentelor disponibile pentru...") |
(Created page with "=== Cerințe === * FreeCAD version 0.16.6700 sau mai modernă * [http://sourceforge.net/projects/netgen-mesher/ Netgen] and/or [http://geuz.org/gmsh/ GMSH] este instalat în s...") |
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=== |
=== Cerințe === |
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* FreeCAD version 0.16.6700 |
* FreeCAD version 0.16.6700 sau mai modernă |
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* [http://sourceforge.net/projects/netgen-mesher/ Netgen] and/or [http://geuz.org/gmsh/ GMSH] |
* [http://sourceforge.net/projects/netgen-mesher/ Netgen] and/or [http://geuz.org/gmsh/ GMSH] este instalat în sistem |
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* In |
* In cazul GMSH, instalarea este recomandată [https://github.com/psicofil/Macros_FreeCAD psicofil's macro] |
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* [http://www.calculix.de/ Calculix] |
* [http://www.calculix.de/ Calculix] este instalat în sistem |
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* |
* Cititorul are cunoștințele de bază pentru a utiliza Atelierele Piese (Part) PartDesign |
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=== Procedure === |
=== Procedure === |
Revision as of 12:57, 9 September 2018
Tutorial |
Topic |
---|
Finite Element Analysis |
Level |
Beginner |
Time to complete |
10 minutes + Solver time |
Authors |
Drei |
FreeCAD version |
0.16.6700 or above |
Example files |
See also |
None |
Introducere
Acest tutorial are rolul de a introduce cititorul în fluxul de lucru de bază al Atelierului MEF, precum și majoritatea instrumentelor disponibile pentru a efectua o analiză statică.
Cerințe
- FreeCAD version 0.16.6700 sau mai modernă
- Netgen and/or GMSH este instalat în sistem
- In cazul GMSH, instalarea este recomandată psicofil's macro
- Calculix este instalat în sistem
- Cititorul are cunoștințele de bază pentru a utiliza Atelierele Piese (Part) PartDesign
Procedure
Modeling
In this example a Cube is used as the study object, but models created in the Part or PartDesign Workbenches can be used instead.
- Create a new document
- Activate the Part Workbench
- Create a Cube
- Change its Dimensions to the following:
- Height: 1.000 mm
- Length: 8.000 mm
- Width: 1.000 mm
Now we have a model with which to work with.
Creating the Analysis
Netgen
- Select the model
- Click New mechanical analysis from the menu to create an analysis from the object that was selected
- 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.
- Activate the macro
- Select the object you wish to use, in this case our Cube
- Check the box Create Mechanical Analysis from mesh
- Click OK
We have now meshed our object and are ready to add constraints and forces.
Constraints and Forces
- Hide the mesh from the Tree View.
- Show the original model
- Select Create FEM fixed constraint
- Select the back face of the Cube (face on the YZ axis) and click OK
- Select Create FEM force constraint
- Select the front face of the Cube (the face parallel to the back face) and set the Area load value to 9000000.00
- Set the Direction to -Z by selecting one of the face edges parallel to that direction.
- Click OK
We now have established the restrictions and forces for our static study.
Final preparations
- Select Mechanical material... and choose Calculix as the material
- Click OK
Running the Solver
Standard Procedure
- Select the solver object contained in the Mechanical Analysis
- Select Start calculation from the menu
- Select Write Calculix Input File
- Select Run Calculix
- Click Close
Quick Procedure
- Select the solver object contained in the Mechanical Analysis
- Click on Quick Analysis.
Analyzing Results
- From the Object Tree, select the Results object
- Select Show result
- Choose among the different Result types to view the results
- 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.
- To remove the results select Purge results
If you select the Z displacement result type, you can see that the obtained value is almost identical to the test example provided by FreeCAD. Differences may occur due to the quality of the mesh and the number of nodes it possesses.
We are now finished with the basic workflow for the FEM Module.