Microscopic Insights into the Thermo-Mechanical behaviour of Glasses
1 : Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]
(LaMCoS)
Institut National des Sciences Appliquées de Lyon, Université de Lyon, Institut National des Sciences Appliquées, Centre National de la Recherche Scientifique : UMR5259
Bâtiment Sophie Germain27b, avenue Jean CapelleF69621 VILLEURBANNE CEDEX -
France
2 : l'Office national d'études et de recherches aérospatiales
(ONERA)
ONERA
University Paris-Saclay, Chemin de la Hunire, BP 80100, 92123 Palaiseau, France -
France
Little is known about the thermo-mechanical couplings taking place within amorphous materials. This is partly due to the fact that the relevant scales involved in these processes are of the order of a few nanometer, therefore very difficult to access experimentally. However, different experimental setups (Raman and Brillouin Spectroscopy, Elastic and Anelastic X-ray scattering, or micromechanical testings) can give partial information on the microscopic mechanisms, as soon as they can be supported by numerical simulations at the atomic scale. In this talk, I will review the microscopic processes that appeared in the last decades to be responsible for the mechanical behaviour as well as thermal transport processes in amorphous materials, at different temperatures. The microscopic basements for the continuum elasto-plastic behaviour of glasses, as well as their effective visco-elastic behaviour, will be discussed in details, together with the behaviour of heat carriers responsible for their low thermal conductivity. This talk will end with a focus on the possibilities offered by materials design at the nanometer scale for the control of thermo-mechanical behaviour of disordered materials.
| Subject : | : | Invited Talk |
| Topics | : | Plenary Lecture |
| Keywords | : | Glasses ; Amorphous materials ; Constitutive laws ; Elasto ; visco ; plastic response ; Thermal conductivity |
| PDF version | : |  PDF version |
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