Scientific advances and innovation

The originality of this project lies in its orientation towards hygromechanical coupling. In the existing work (state of the art), there is a lot of data on the fall of properties after water aging, however there is an interaction between the water absorption and the mechanical in-service stress that can cause hygromechanical couplings, even acceleration of damage and premature failure. Moreover, in real applications, water and mechanical loadings act together, and a faithful prediction of the response of a composite marine structure must take into account the present couplings.

Expected technical and economic impact

The project is expected to provide numerical predictive tools of the lifetime of composite structures for EMR applications. These simulations should reduce the inspection and maintenance of parts in service.

Key project milestones

  • T0 -> T0+36 - Work Package 1. Bibliographic research
  • T0 -> T0+18 - Work Package 2. Identification of creep / damage / diffusion couplings
  • T0+6 -> T0+32 - Work Package 3. Development of a numerical tool for the prediction of the coupling diffusion of water / damage propagation
  • T0+24 -> T0+36 - Work Package 4. Validation


The CEAUCOMP project is based on 2 main axes: water diffusion and the mechanical behaviour of composite materials. Initially, the two phenomena were studied in an uncoupled way (diffusive and mechanical characterizations separated). Indeed, a complete diffusive study has been carried out for over 500 days to understand the diffusive behavior (figure 1a) and the hygroscopic swelling linked to this water absorption (figure 1b).

On the other hand, the mechanical behavior has been analyzed at different aging times (0 to 500 days) in a quasi-static instantaneous way to highlight the influence og the aging on mechanical properties in an uncoupled…

A viscoelastic model was used to represent the creep behaviour of the studied materials and then introduced in a finite element software to perform hygro-viscoelastic simulations (diffusive and viscoelastic coupling) and and analyze local hygro-mechanical fields.


Publications and papers published

Oral communications


Article under review

Q. Dezulier1, A. Clement1, P. Davies2, M. Arhant2, B. Flageul2, F. Jacquemin1 “Water ageing effects on the elastic and viscoelastic behavior of epoxy-based materials used in marine environment”  Accepté par l’éditeur, actuellement en cours de review