Europlexus (EPX) is a simulation software dedicated to the analysis of fast transient phenomena involving structures and fluids in interaction. The program is co-owned by the Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA) and the Joint Research Centre of the European Commission (EC/JRC). Its development is carried out through a Consortium involving the co-owners and so-called major partners who are granted a complete access to the source code and development tools (see CEA and JRC (2016)).

Time integration is achieved through a conditionally stable explicit scheme.

Description of the interface

The following features are currently available:

Example of generated input file fragment

The following listing gives an example of generated input file fragment for an axisymmetric modelling hypothesis:

LIB ''
LAW 'LogarithmicStrainNortonCreep'
!! material properties
MATP 'YoungModulus' ???
MATP 'PoissonRatio' ???
MATP 'A' ???
MATP 'E' ???
!! internal state variables
!! by default, internal state variables are set to zero
!! IVAR 'ElasticStrain'  ??? ??? ??? ???
!! IVAR 'EquivalentViscoplasticStrain'  ???
!! external state variables
EVAR 'Temperature' 293.15

The user must replace each occurrences of ‘??’ by appropriate values.


CEA, and JRC. 2016. “Europlexus Web Site.” 2016.

EDF. 2013. “Loi de Comportement Hyperélastique : Matériau Presque Incompressible.” Référence du Code Aster R5.03.19. EDF-R&D/MITI/MMN.

Miehe, C., N. Apel, and M. Lambrecht. 2002. “Anisotropic Additive Plasticity in the Logarithmic Strain Space: Modular Kinematic Formulation and Implementation Based on Incremental Minimization Principles for Standard Materials.” Computer Methods in Applied Mechanics and Engineering 191 (47–48):5383–5425.