Professeur Patrick Le Tallec
Directeur du LMS
Solid Mechanics Laboratory
The general objective of Solid Mechanics Laboratory is to propose, build, analyze and validate thermodynamically consistent models in a multiscale, multiphysics framework. In particular, the laboratory aims to be a major player in the design, manufacture, calculation and analysis of reliability for environments and heterogeneous materials- micro or nanostructured thin films, nano-objects, or biological tissues. This is to study and understand the aspects of manufacturing and long-term mechanical behavior of these objects, aspects that are increasingly closely linked. The approach combines experimental implementation, mathematical modeling and calculation, as explained in the different presentations on site.
To achieve this goal, the first priority is to attract and recruit top international researchers, teachers and creative research engineers with strong potential. The laboratory is immersed in a very dynamic environment with its growing global power and development of the Saclay plateau. This environment fosters multidisciplinary research and industrial collaboration through long term collaboration contracts or through the implementation of industrial chairs.
Experimental support for research on the interfaces on microarchitectures, on new polymers, on fine scale mircrostructures or on biological materials requires the development of complex tests at various scales, usually in situ with several simultaneous loading axis and real-time interaction with the deformation analysis by imaging at increasingly small scales. In an experimental park that develops by its own action and cooperation in the framework of Équipex Matmeca, it is necessary to develop sample preparation techniques on a very small scale, improve the quality of sensors and more generally to develop a multiphysics micromechanics characterization platform for in-situ tests. This project complements the PLATINE platform developed jointly with LPICM and IFSSTAR for the analysis and qualification of nano objects under environmental tests.
The other priority in terms of equipment concerns additive manufacturing techniques. It is indeed necessary to be able to imagine, develop and manufacture its own materials and microstructure of the samples. This includes multi-material polymers printers for the design and manufacture of flexible and active microarchitectures materials under ERC MAGNETO and a more recent effort tuned towards nanoscale photolithography technologies. But as the major issues remain on additive manufacturing and repair metal alloys, the lab has installed for research purposes a 3D metallic printer together with ENSTA, as part of a project supported by the DGA. This first machine studies the mechanical impact and potential of additive manufacturing based on cladding. On the other hand, the lab participates to a joined regional project organized around powder bed processes.
The laboratory will finally remain present on aspects of underground storage in particular with the study of behavior in the long term and low load geomaterials. This axis is very important in the energy sector both for the waste storage, CO2 sinks, and gas storage.