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SUMMARY:Towards rationally designed active metamaterials - Jorn Dunkel (Ma
 ssachusetts Institute of Technology)
DTSTART:20190514T084000Z
DTEND:20190514T092000Z
UID:TALK124369@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Recent advances in 3D printing and lithography have spurred ra
 pid progress in the development of passive metamaterials. By interweaving 
 simple subunits in intricate geometric arrangements\, metamaterials can be
  custom designed to have many remarkable response features\, from acoustic
  and photonic band gaps to auxetic behavior and topological robustness. In
  parallel\, the last few years have seen the introduction of new classes o
 f artificial and bio-inspired active materials based on colloidal and micr
 obial suspensions or internally actuated gels. These non-equilibrium syste
 ms show great promise as components in autonomous soft robotic and microfl
 uidic devices\, and have reached a level of understanding where these appl
 ications can now be fruitfully developed. In this talk\, I will discuss ou
 r recent work that aims to implement a computational framework for the inv
 erse design of discrete active metamaterials. Building a network-based des
 cription\, we will illustrate how optimized material structures can be use
 d to harvest energy from correlated fluctuations [1\,2]\, and outline basi
 c design principles for active topolectrical circuits [3].  [1] Woodhouse 
 et al\, Phys Rev Lett 121: 178001\, 2018       [2] Ronellenfitsch et al\, 
 Phys Rev Lett 121: 208301\, 2018        [3] Kotwal et al\, arXiv:1903.1013
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LOCATION:Seminar Room 1\, Newton Institute
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