Appel à projets "post-doctorants" n°1

• Sujet encadré par Joel MARTHELOT (IUSTI), Cédric BELLIS & Stéphane BOURGEOIS (LMA)

Elastic sheets with mesoscale architecture obtained by folding or cutting have recently drawn considerable interest in the mechanics and engineering community. The cuts and features can be tailored to allow the sheets to morph into complex three dimensional shapes with unusual mechanical characteristics such as auxeticity, deployability and programmable non-linear properties.The main objective of the project is twofold: to identify and build a fundamental understanding of the ​mechanical response of hyperelastic membranes with architected cut patterns on the one hand and to transfer the resulting tunable mechanisms to prototypes for more reliable compliant medical devices​ on the other hand (…)

• Sujet encadré par Emilie FRANCESCHINI (LMA) & Laurence BERGOUGNOUX (IUSTI)

Complex fluids are ubiquitous in nature and in industry: biological fluids (blood, mucus), erosion sludge or industrial pastes. From a theoretical point of view, the characterization of these media is confronted firstly to the huge variety of particle size and shape that compose them, and secondly to the coupling between the macroscopic and microscopic scales: the flow is controlled by the spatial distribution of the particles (i.e., the microstructure of the suspension), but the macroscopic flow back-acts and modifies this microstructure. From an experimental point of view, it is crucial to develop tools to investigate the microstructure of concentrated suspensions. The use of optical methods is limited to diluted suspensions or transparent concentrated suspensions (by using an iso-index technique) that are not representative of natural or industrial conditions (…)