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Accueil > Evénements > Séminaires > Archives 2016 > Elasticity and dynamics
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Séminaire général de l’INSP

Elasticity and dynamics of filaments and their networks - Eugene Terentjev - Jeudi 8 septembre 2016 à 16 h 30

INSP - UPMC - 4 place Jussieu - 75005 Paris - Barre 22-23, 3e étage, salle 317

Eugene Terentjev - Cavendish Laboratory, Cambridge (UK)

Abstract

From the cytoskeleton to connective tissues, fibrous networks are ubiquitous in metazoan life as the key promoters of mechanical strength, support and integrity. There has been much progress in discovering and explaining the striking mechanical phenomena observed in such networks (such as strain-stiffening, power-law rheology and fluidisation – all key to the biological function). In this seminar we will start with the physics of individual filaments, and how tensegrity determines the stability and modulus of their networks. We then discuss the case of breakable crosslinks and the response of transient filament networks to strain step (relaxation) or strain ramp (yield and plasticity). If things go really well, we may have time to touch on how to « deal » with systems characterised by power-law (or stretched-exp) relaxation : where it comes from, how to solve mechanical problems, and how to define the « relaxation time » and « equilibrium » when the practical experiment never reaches one.