Universiteit Leiden

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Lezing

Joan van der Waals colloquium - online

Datum
vrijdag 13 november 2020
Tijd
Locatie
Huygens
Niels Bohrweg 2
2333 CA Leiden
Zaal
Online, virtual borrel afterwards

Mechanical Pathways, Hysterons and Metamaterials.

A central goal of condensed matter is to understand the response of materials to external driving. While in some cases the response can be captured by bulk parameters, e.g., elastic moduli, the nonlinear response of a wide range of complex, frustrated materials - granular media, disordered magnets, soft glasses - escape such an approach. Frustration prevents relaxation to equilibrium, and these materials are stuck in one of many minima in a rough energy landscape.  When the driving overcomes the shallow barriers, the ensuing nonlinear response consists of smooth reversible stretches punctuated by irreversible hopping between the different mesostates: we refer to this sequence of steps as a pathway.

Here I discuss our current work in probing, understanding and designing such pathways in crumpled sheets, models of so-called hysterons, and mechanical metamaterials.

Zoom link:

https://us02web.zoom.us/j/85449906697?pwd=bEMzVVFkMU1yWEdkUEtVMStkQ1dPQT09

Meeting ID: 854 4990 6697

Passcode: 822762

Preact is Vitaly Fedoseev, title will follow soon.

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