PhD Thesis inside the DuMAS departement are within the scope of the four research groups.
Comparative analysis of strategies for qualifying the durability of polymer coatings and glued interfaces
PhD Thesis of Julien Bourbon (since November 2018)
The weight reduction of aeronautical structures is a constant problem. The aim is to significantly reduce fuel consumption and increase mechanical performance. Weight reduction is achieved by introduction of more efficient materials and new assembly technologies. Structural bonding seems to be a promising way to replace traditional methods (riveting, bolting, welding..). This thesis in partnership with ArianeGroup and Safran aims to develop tests (mode I) permitting to study aeronautical adhesives while aging them. DCB test, wedge test (right picture) and blister test (left picture) will be privileged test.
Study of fatigue behaviour at large number of cycles of lattice structures produced by additive manufacturing
PhD thesis of Marie Pirotais (since November 2018)
The objective of this thesis work is to understand the damage mechanisms of periodic porous structures under cyclic loading and to develop fatigue calculation methods.
This work will be based on microstructure characterization and damage characterization (tomography) and on the implementation of a multi-scale approach for the damage of these microstructures (microstructure calculation).
Ageing of bonded joints under combined mechanical loading and agressive environment exposure
Justine Bertrand's PhD thesis (since December 2017)
As we use more and more bonded joints in structural components in the civil engineering field, biomechnaical field as well as the aeronautic field, issues in dimensioning and prediction of the behaviour of those bonded joints need to be assess. Indeed, in order to reduce weight, stress concentrations, to make the assembling process easier, to solve sealing issues and many other reasons, bonded joints are used instead of conventional mechanical fastening. Many studies allows to dimension bonded joints according to mode I testing but mode II (shear) testing is not fully developed for bonded joints yet whereas they show great performances under mode II loading.
The aim of this project is to study shear behaviour of bonded joints under agressive environment exposure. This thesis is a part of a co-joint program between Bordeaux Univeristy and Girona University.