AudiLab Software CalculiX is developed
primarily by Guido Dhondt and Klaus Wittig, employees of MTU Munich.
It runs under *n*x and Microsoft Windows, and is distributed under the
GNU GPL licence. It uses the Abaqus file format and does linear and
non-linear calculations. It consists of ccx, the solver,
and cgx, the pre- and post-processor.
Our Fad finite-element preprocessor can export models in Abaqus format. Currently the export works only for thin-shell (Sap type 6) elements and for tetrahedral elements (Sap type 13).
Extensive documentation is available on the CalculiX Web site.
The following are links to local copies (restricted access) of original documentation as of 2010 Jan:
There is also a CalculiX group