Calculix

{{Short description|Finite-element analysis application}}

{{Infobox software

| name = CalculiX

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| screenshot = lav.png

| caption = Compressor of a turbocharger

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| author = Guido Dhondt, Klaus Wittig

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| latest release version = 2.22

| latest release date = {{Start date and age|2024|08|05}}

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| programming language =

| operating system = Linux, Windows

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| genre = Finite element analysis

| license = GPL (free software)

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| website = {{URL|https://www.dhondt.de}}

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CalculiX is a free and open-source finite-element analysis application that uses an input format similar to Abaqus. It has an implicit and explicit solver (CCX) written by Guido Dhondt and a pre- and post-processor (CGX) written by Klaus Wittig.[http://www.calculix.de CalculiX website]. The original software was written for the Linux[http://www.libremechanics.com/?q=node/9 How To Install CalculiX 2.6 multi-thread under Ubuntu 11.04 and later]. operating system. Convergent Mechanical has ported the application to the Windows operating system.[http://www.bConverged.com Convergent Mechanical's website].

The pre-processor component of CalculiX can generate grid data for the computational fluid dynamics programs duns, ISAAC and OpenFOAM. It can also generate input data for the commercial FEM programs Nastran, Ansys and Abaqus.[http://imechanica.org/node/1628 CalculiX Review by iMechanica]. The pre-processor can also generate mesh data from STL files.

[http://bconverged.com/calculix/doc/cgx/html/cgx.html CGX Documentation].

There is an active online community that provides support at Discourse.[https://calculix.discourse.group/ CalculiX Discourse Group]. Convergent Mechanical also provides installation support for their extended version of CalculiX for Windows.

There is a friendly CalculiX Launcher[https://sourceforge.net/projects/calculixforwin/ CalculiX Launcher (SourceForge)]. with CCX wizard for both Windows and Linux.

[http://calculixforwin.blogspot.mx/2015/05/calculix-launcher.html CalculiX Launcher].

Also possible is the Installation in Windows 10 Fall Creator (1709) with the new Linux Subsystem WSL.{{Cite web|url=https://carlomonjaraztec.wordpress.com/2017/07/10/ccx_in_win10/|title=HOW-TO Install CalculiX in Windows 10 with Windows Subsystem for Linux (WSL) from original source|date=July 10, 2017}}

A Python library, pycalculix,[http://justinablack.com/pycalculix/ pycalculix website]. was written to automate the creation of CalculiX models in the Python programming language. The library provides Python access to building, loading, meshing, solving, and querying CalculiX results for 2D models. Pycalculix was written by Justin Black. Examples and tutorials are available on the pycalculix site.

FreeCAD has developed a FEM workbench that automates the creation of CalculiX models.

There is a lot good examples of use of CalculiX[https://github.com/mkraska/CalculiX-Examples/ CalculiX examples]. by Prof. Martin Kraska, Brandenburg University of Applied Sciences.

Official repository at Github is https://github.com/Dhondtguido/CalculiX.