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== Introduction ==

<div class="mw-translate-fuzzy">
=== Prefață ===
=== Prefață ===
Această pagină colectează toate informațiile despre solver CalculiX [[http://www.calculix.de/ CalculiX]], cel mai utilizat și cel mai bine dezvoltat solver din modulul FEM. În funcție de sistemul de operare pe care îl lucrați cu dvs., trebuie să instalați mai întâi CalculiX. Verificați [[FEM_Install | FEM Install]].
Această pagină colectează toate informațiile despre solver CalculiX [[http://www.calculix.de/ CalculiX]], cel mai utilizat și cel mai bine dezvoltat solver din modulul FEM. În funcție de sistemul de operare pe care îl lucrați cu dvs., trebuie să instalați mai întâi CalculiX. Verificați [[FEM_Install | FEM Install]].
</div>


The solver is able to do linear and non-linear calculations, for static, dynamic, and thermal problems. The solver operates on an Abaqus input file ({{incode|.inp}}), which means it can be used with different pre-processors that support this format. The program includes its own graphical preprocessor which, however, is not used by FreeCAD, only the solver itself.
=== Interface ===
Interaction between FEM Module and CalculiX is done by text files. The FEM Module writes a CalculiX input file, starts CalculiX, logs the output of CalculiX and read the output files of CalculiX if they are available. The [[FEM SolverControl|FEM Control Solver]] tool manages the whole process. User interaction in the process is possible.


CalculiX is designed to run on Unix platforms like Linux and Irix computers but also on MS-Windows. CalculiX was developed by engineers from MTU Aero Engines, Munich, Germany, to assist them in designing machinery such as jet turbines. The software is currently released to the public on the terms of the GPL version 2.
==== Preprocessing interface ====

CalculiX uses abaqus input file format. The input file could be edited before the solver is started. The units used in the CalculiX input file are independet from the units used in FreeCAD. They will be mm and N. (ToDo: check this. What happens with the mesh if inch is used in FreeCAD. Density was introduced. With this we have kg and s and no longer N?! how about this !?!)
== Integration with FreeCAD ==

<div class="mw-translate-fuzzy">
=== Interfața ===
Interacțiunea dintre modulul FEM și CalculiX se face prin fișiere text. Modulul FEM scrie un fișier de intrare CalculiX, pornește CalculiX, înregistrează ieșirea CalculiX și citește fișierele de ieșire ale CalculiX dacă acestea sunt disponibile. Instrumentul [[FEM SolverControl | FEM Control Solver]] gestionează întregul proces. Interacțiunea cu utilizatorul în acest proces este posibilă.
</div>

# A CalculiX input file is created with details required to run the simulation
# The CalculiX solver is started with this input file
# The output from the solver is logged
# The output files from the solver are read, if they are available

The [[FEM_SolverControl|FEM Control Solver]] tool manages the whole process. User interaction in the process is possible.

== Preprocessing interface ==

The input file that CalculiX uses can be prepared and edited before the solver is started. The units used in the input file are independent of the units set in FreeCAD; they will always be millimeters (mm) and Newton (N).

{{Emphasis|(ToDo: check this. What happens with the mesh if inch is used in FreeCAD? As density was introduced, with this we have kg and s and no longer N?! how about this?!)}}

The CalculiX interface supports the following objects:

=== FEM Elements ===


The FEM Module - CalculiX interface supports the following objects:
===== FEM Elements =====
* Tet4 and Tet10
* Tet4 and Tet10
* S3 and S6
* S3 and S6
* B31 and B32
* B31 and B32
* and a few more ... [[FEM_Mesh_CalculiX|FEM Mesh CalculiX]]
* and those described in [[FEM_Mesh_CalculiX|FEM Mesh CalculiX]]


===== Analysis =====
=== Analysis ===

* linear static analysis
* Linear and nonlinear static analysis
* Frequency analysis
* Frequency analysis
* Coupled thermal structural analysis
* Linear buckling analysis
* Coupled thermal-structural analysis

=== Materials ===

* Linear elastic isotropic materials (uniformity in all directions)
* Plasticity with isotropic hardening

== Postprocessing interface ==

<div class="mw-translate-fuzzy">
==== Interfață postprocesare ====
citiți stresul rezultat (Von Mises) și toate deplasările
</div>

Reaction forces can be found in ccx_dat_file which contains reaction force components (fx, fy, fz) for each fixed boundary condition and for each displacement boundary condition which constrains translation degrees of freedom.


===== Materials =====
== Related ==
* one linear elastic isotropic (uniformity in all directions) material
* multiple material is in development


* [[FEM_Mesh_CalculiX|FEM Mesh CalculiX]]
==== Postprocessing interface ====
* [[FEM_Preferences#CalculiX|CalculiX preferences]] dialog menu in the FEM Workbench preferences menu
read resulting stress (Von Mises) and all displacement




{{FEM Tools navi{{#translation:}}}}
[[Category:Poweruser_Documentation]]
[[Category:Developer]]
[[Category:Poweruser_Documentation{{#translation:}}]]
[[Category:Developer{{#translation:}}]]
{{clear}}

Latest revision as of 18:46, 7 December 2023

Introduction

Prefață

Această pagină colectează toate informațiile despre solver CalculiX [CalculiX], cel mai utilizat și cel mai bine dezvoltat solver din modulul FEM. În funcție de sistemul de operare pe care îl lucrați cu dvs., trebuie să instalați mai întâi CalculiX. Verificați FEM Install.

The solver is able to do linear and non-linear calculations, for static, dynamic, and thermal problems. The solver operates on an Abaqus input file (.inp), which means it can be used with different pre-processors that support this format. The program includes its own graphical preprocessor which, however, is not used by FreeCAD, only the solver itself.

CalculiX is designed to run on Unix platforms like Linux and Irix computers but also on MS-Windows. CalculiX was developed by engineers from MTU Aero Engines, Munich, Germany, to assist them in designing machinery such as jet turbines. The software is currently released to the public on the terms of the GPL version 2.

Integration with FreeCAD

Interfața

Interacțiunea dintre modulul FEM și CalculiX se face prin fișiere text. Modulul FEM scrie un fișier de intrare CalculiX, pornește CalculiX, înregistrează ieșirea CalculiX și citește fișierele de ieșire ale CalculiX dacă acestea sunt disponibile. Instrumentul FEM Control Solver gestionează întregul proces. Interacțiunea cu utilizatorul în acest proces este posibilă.

  1. A CalculiX input file is created with details required to run the simulation
  2. The CalculiX solver is started with this input file
  3. The output from the solver is logged
  4. The output files from the solver are read, if they are available

The FEM Control Solver tool manages the whole process. User interaction in the process is possible.

Preprocessing interface

The input file that CalculiX uses can be prepared and edited before the solver is started. The units used in the input file are independent of the units set in FreeCAD; they will always be millimeters (mm) and Newton (N).

(ToDo: check this. What happens with the mesh if inch is used in FreeCAD? As density was introduced, with this we have kg and s and no longer N?! how about this?!)

The CalculiX interface supports the following objects:

FEM Elements

Analysis

  • Linear and nonlinear static analysis
  • Frequency analysis
  • Linear buckling analysis
  • Coupled thermal-structural analysis

Materials

  • Linear elastic isotropic materials (uniformity in all directions)
  • Plasticity with isotropic hardening

Postprocessing interface

Interfață postprocesare

citiți stresul rezultat (Von Mises) și toate deplasările

Reaction forces can be found in ccx_dat_file which contains reaction force components (fx, fy, fz) for each fixed boundary condition and for each displacement boundary condition which constrains translation degrees of freedom.

Related