In this line of research, I am interested in modeling the third body already present in a contact interface. If we think in terms of flows, we can consider the cases where the internal flow is zero through academic examples, but also through more or less exotic applications. We can also introduce the concept of source flow by taking into account degradation phenomena.
Local behavior law and macroscopic friction
As part of the modeling of third body flows, I essentially work to understand the differences present in the literature concerning macroscopic friction measurements, obtained on an elementary cell, using different approaches. This activity proves to be a real bridge between my activities carried out in the two laboratories since I can couple tribological and granular considerations and their associated characterization tools.When shearing a discrete medium, the impact of the stiffness of local interactions on the macroscopic behavior was studied. We thus showed that the characteristic curve macroscopic friction versus internal cohesion is strongly dependent on this stiffness, especially for cohesion strength value (cf Fig. 1), in showing that a low value can lead to a misinterpretation of macroscopic results (see HDR).