Wrinkle patterns in active viscoelastic thin sheets

Statistical Physics and Complexity Group meeting

Wrinkle patterns in active viscoelastic thin sheets

  • Event time: 11:30am until 12:30pm
  • Event date: 22nd April 2020
  • Speaker: Dr Rastko Sknepnek (University of Dundee)
  • Location: Room 2511,

Event details

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. In the regime where active processes are faster than viscoelastic relaxation, wrinkles that are formed due to remodelling are unable to relax to a configuration that minimises the elastic energy and the sheet is inherently out of equilibrium. We argue that this non-equilibrium regime is of particular interest in biology as it allows the system to access morphologies that are unavailable if restricted to the adiabatic evolution between configurations that minimise the elastic energy alone. Here, we introduce activity using the formalism of an evolving target metric and showcase the diversity of wrinkling morphologies arising from out of equilibrium dynamics.