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SUMMARY:Odd elasticity in soft active solids - Anton  Souslov (University 
 of Bath)
DTSTART:20190514T142000Z
DTEND:20190514T150000Z
UID:TALK124405@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:An active material is either a solid or a fluid in which micro
 scopic constituents convert energy into motion. These microscopic engines 
 can be organised to output collective macroscopic work. For active solids\
 , we show that the theory of elasticity can be modified to describe this w
 ork-extraction process. This talk focuses on the specific example of how a
 n antisymmetric (or odd) component of the elastic tensor leads to the extr
 action (or injection) of work during quasi-static cycles of elastic deform
 ations. Such materials can be designed based on active mechanical componen
 ts that include sensors and actuators. Inside the material\, work-extracti
 on cycles manifest themselves in signal propagation: in an overdamped acti
 ve solid\, elastic waves propagate via a balance between energy injection 
 and dissipation. In addition\, activity can be measured via static deforma
 tions\, including activity-induced auxetic behaviour. This theory of odd e
 lasticity suggests design principles for emergent autonomous materials in 
 which work is locally injected\, transported\, and then extracted.
LOCATION:Seminar Room 1\, Newton Institute
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