EDF guarantees the technical and economical capabilities of its electricity production means, from the conception to the end of operational life. The safety and availability requirements infer the need to verify the correct operation, maintenance and replacements conditions of machines through numerical simulation. The analysis of real behaviour and the risks associated with mechanical and civil engineering structures require knowledge over non linear models of mechanical and thermal phenomena. Code_Aster has been developed to satisfy these needs.

With Whom?

The main team is responsible for the coherence and quality (from the architecture to the exploitation) of the code. A development network provides models adapted to different materials and mechanical components found in electrical industry equipment. Led by EDF-R&D, this network contains industrial and university researchers as well as project coordinators. It aims at giving on time the results of the innovations that are essential to evaluate the problems of the system under use and of new projects. The Code_Aster Users’ Day shows the vitality of the network.


The industrialisation of models, the adaptation of achievements and the qualification take advantage of 23 years of development. The configuration management tool allows the involved researchers to verify the coherence of new modifications, their conformity with the rules and non-regression policy of the modified code (over 3,000 tests performed in configuration). prior to their integration within the code. The architecture of Code_Aster (a FORTRAN base associated to object language) depends on a memory/disk image manager, a command “supervisor” and a finite element calculation engine (the algorithms are built independently from the elements formulation).

Attached documents:

Free software for computational mechanics : EDF’s choice
Code_Aster presentation