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DTSTART:19700329T010000
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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Making Faces: Universal Inverse Design of Thin Nem
atic Elastomer Surfaces - Hillel Aharoni (Weizmann
Institute of Science)
DTSTART;TZID=Europe/London:20190513T133000
DTEND;TZID=Europe/London:20190513T141000
UID:TALK124273AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/124273
DESCRIPTION:Thin nematic elastomer sheets can be programmed\,
via the nematic director field embedded into them\
, to take different shapes in different environmen
ts. Recent experiments from various groups demonst
rate excellent control over the director field\, t
hus opening a door for achieving accurate and vers
atile designs of shape-shifting surfaces. At the c
rux of any effort to implement this design mechani
sm lies the inverse design problem -- given an arb
itrary surface geometry\, constructing the directo
r field that would induce it. In this talk I descr
ibe several aspects of this inverse problem. I pre
sent a numerical algorithm for finding global appr
oximate solutions for any 2D geometry. I also show
that many exact solutions always exist locally an
d can be readily integrated\, and classify the set
of all director fields that deform into an arbitr
ary given geometry. These results allow optimizing
the resultant director fields for different purpo
ses\, e.g. maximizing the domain of a global solut
ion\, increasing its robustness\, reducing residua
l stresses\, or controlling the entire shape-shift
ing path.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:info@newton.ac.uk
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