The objective of this project is to continue the work of Corentin Humeau (PhD thesis of the University of Nantes, 2017), within the framework of an ONR (Office of Naval Research) project, in order to develop predictive models for composite materials in coupled conditions. The coupling here results in the exposure of the composite to immersion in water under mechanical loading. These conditions accelerate the development of the damage compared to uncoupled conditions usually taken into account (water aging followed by mechanical loading). However, the EMR structures in service undergo coupled conditions, and it is therefore essential to develop predictive tools that take them into account.
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
Publications and papers published
This work will be published in peer-reviewed international journals (eg Composite Structures), and in national (eg Journées Nationales des Composites) and international conferences (eg European Conference on Composite Structures).