ENSTA Bretagne : Modélisation

PTR2: Multi-material assemblies

The IRDL’s “Multi-material assemblies” thematic research cluster focuses on innovation with respect to assembly processes, the characterization of their long-term behavior in harsh environments and the development of hybrid techniques.

Research focus

  • Assembling different types of materials to ensure long service life in harsh environments such as the marine environment.
  • Developing innovative means of assembly that take in-service conditions into account and involve the use of new materials, new alloy grades, new surface treatments, etc.
  • Introducing hybrid techniques (bond-welding, etc.) that require extensive studies, to achieve high performance in terms of assembly time or mechanical characteristics.


  • Assembly instrumentation
  • Characterizing the multi-physical properties of materials and the long-term behavior of bonded and welded assemblies
  • Multiscale modeling of physical phenomena during and after assembly, until failure


Assembly, bonding, welding, sintering, additive manufacturing, multi-material

Examples of research programs in which ENSTA Bretagne is involved:

Development of a multi-material bonded structural assembly providing ballistic protection (2018-2021; in collaboration with the PTR3).


Influence of the manufacturing process on the buckling of a cylindrical shell under axial compression (2017-2020; in collaboration with the PTR5).


Instrumentation and durability of bonded multi-material structures of marine renewable energy production systems (2015-2019).


Behavior, modeling and simulation of the structural bonding of bonded composite structures, under a wide range of temperatures and strain rates, taking aging into account, to improve the durability of marine renewable energy production systems (2014-2019).

European H2020 project RAMSSES: for more sustainable and efficient ships

13 areas of innovation have been determined for this European project that brings together 37 partners from 11 countries.

The team leads the work carried out on the durability of bonds between a composite module and a metal structure and on the setting up of a high cycle fatigue design calculation chain for steel thrusters made using additive manufacturing, with large-scale validation testing (2017-2020 with PTR 2 and 5).



David Thévenet
Associate Professor
"Multi-material assemblies" team, IRDL laboratory (UMR CNRS 6027)
+33 (0)2 98 34 88 07