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Wrinkle Patterns in Active Viscoelastic Thin Sheets
Published on Jan 21, 202026 Views
We show that a viscoelastic thin sheet driven out of equilibrium by active structural remodelling develops a rich variety of shapes as a result of a competition between viscous relaxation and activity
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Chapter list
Wrinkle Patterns in Active Viscoelastic Thin Sheets00:00
Belgrade airport yesterday afternoon…01:05
Gastrulation movements in chick embryo02:21
Early embryonic development:03:02
3D view of the process:04:52
Bacillus subtilis biofilm formation05:35
Radial wrinkles result from growth06:32
Expansion in confinement (wet paper)06:50
Viscoelastic behaviour – depending on the scale material behaves either as an elastic solid or as a liquid.09:02
Model: viscolelastic non-Educlidean plate09:42
Model: elastic theory of non-Euclidean plate - 111:01
Model: elastic theory of non-Euclidean plate - 214:12
Discretisation of thin-sheet elasticity16:37
Discrete mode - continued18:08
Viscoelasticity (in a nutshell)20:33
Modelling Viscosity21:36
Dynamics:23:09
What happens if active remodelling is faster than elastic relaxation and viscous dissipation? 27:34
active remodelling speed31:04
NON-Equilibrium Dynamics and form32:45
Non-Equilibrium Dynamics and form33:10
How much does it cost for form a fold pattern?34:23
Wrinkle evolution in the Fourier space35:46
How much does it cost?36:52
What we have learnt about out of equilibrium wrinkling?38:00
Fully funded PhD positions available!38:54