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SUMMARY:Instabilities in kirigami structures  - Dr Marcelo Dias\, Universi
 ty of Edinburgh
DTSTART:20221209T150000Z
DTEND:20221209T160000Z
UID:TALK193402@talks.cam.ac.uk
CONTACT:Jamie Clarkson
DESCRIPTION:Kirigami\, an ancient Japanese art of paper cutting\, inspires
  new ways to tailor the morphology and the mechanics of thin elastic sheet
 s. It has been found to be of special relevance to applications in reconfi
 gurable structures (e.g.\, large deployable structures) and microstructure
 s (e.g.\, stretchable graphene sheets). Indeed\, careful tailoring of cut 
 patterns results in structures with interesting non-linear macroscopic res
 ponses emerging from local instabilities. In this presentation\, we will d
 iscuss local effects in Kirigami by focusing our attention on the study of
  the deformation of a thin sheet with a single cut—i.e.\, the most basic
  and fundamental geometric building block of Kirigami. We will also discus
 s a new phenomenon that arises when kirigami sheets interact with a liquid
  substrate\, namely elastocapillary kirigami. We study the effects of a li
 quid foundation and how it changes the nature of the local instabilities. 
 Our analysis reveals that post-buckling configurations displays two types 
 of a phase transitions: continuous (second order phase transition)\, which
  suggests a uniform phase\; and a discontinuous transition (first order)\,
  leading to a phase propagation through kirigami structures.
LOCATION:CivEng Seminar Room (1-33) (Civil Engineering Building)
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