FEM CalculiX
This page collects all informations about the Solver used by FreeCAD's FEM Module. This also contians the interface between the Solver and FreeCAD in Pre- as well as Postprocessing. At the moment (Mid 2015 and FreeCAD 0.16dev) the only supported Solver by the FEM Module is [CalculiX].
CalculiX
Depending on the operating System you are working with you need to install CalculiX first. Check out [FEM Install].
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.
Preprocessing
The CalculiX uses abaqus input file format.