Moving needles in moving haystacks: a quest for the microscopic origin of yielding
| Quand ? |
Le 16/11/2021, de 11:00 à 12:00 |
|---|---|
| Où ? | Salle des thèses |
| Participants |
Stefano Aime |
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Yielding and failure of materials under load are widespread, occurring from geological scales, as in earthquakes, to biological and soft-matter systems, with huge implications to everyday life and material science. Despite consistent efforts in this field, failure is very often undesired and unpredicted: surprisingly, or maybe unsurprisingly, it turns out that what is so common in our daily experience is based on profound science that is not yet fully understood. In this talk, I will discuss experiments in which we investigate the microscopic signature of yielding in various soft materials, by simultaneously measuring their mechanical response and microscopic dynamics. I will show that yielding entails qualitative and quantitative changes of the microscopic dynamics, and I will discuss the potential implications of this dynamic transition.