PhD opportunities

Mechanical behavior of technical composites resin subjected to thermo-hydro-glycol ageing: Microstructure-property relationships

Thesis proposal

Area of expertiseComputational mechanics and Materials
Doctoral SchoolSFA - Sciences Fondamentales et Appliques
SupervisorNolle BILLON
Co-supervisorM. Jean-Luc BOUVARD
Research unitCentre for material forming
KeywordsHydro-glycol ageing, PA66, microstructural characterization, constitutive behavior
AbstractThis work will aim to characterize the evolution of the mechanical behavior of PA 66 matrix in the presence of water and glycol. Indeed, water-glycol mixtures are very often located in the cooling circuits of automotive engines where the reinforced polyamide is also intensively used. The polymer in contact for a long period of time with the water and the glycol can absorb some amount of these elements which then diffuse towards the material volume. These small molecules act as plasticizers, modifying the molecular mobility and therefore the mechanical behavior of the composite resin.

The thesis will have three aspects:
A thermomechanical characterization of the material as a function of its thermo-hydro-glycol ageing state;
An identification of the microstructural evolution with ageing;
Accounting for these evolutions in the VENU material model, developed during DAMOFIP and validated during DURAFIP.

This study will take advantage of SOLVAY's expertise to identify ageing conditions that could have a strong impact on the material. A strong collaboration with the SMART team of LEM3 will allow to propose inputs for the development of numerical models regarding composite.
ProfileSkills in materials science and mechanics. Polymer knowledge is essential.
FundingFinancement d'un ministre hors MESRI