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SUMMARY:The textured response of nematic elastomers and other strange soli
 ds - Professor Mark Warner\, Cavendish Laboratory
DTSTART:20120127T140000Z
DTEND:20120127T150000Z
UID:TALK35725@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:Nematic solids change their order when heated or illuminated a
 nd thereby elongate or contract by between 4 - 400%.  They make interestin
 g responsive cantilevers and\, if they possess topological defects in thei
 r nematic fields\, flat sheets can develop into shells with Gaussian curva
 ture without stretch energy.\nElastomeric nematic solids retain mobility o
 f their ordering direction.  Some large shears and elongations are achieve
 d without energy cost by rotation of this direction.  With boundary constr
 aints\, microstructure development is required to achieve such optimal def
 ormations.  Surprisingly\, large soft deformations of polydomains can be a
 chieved via texture evolution.  We place bounds on their deformation energ
 ies\, even for finite strains.
LOCATION:Oatley Seminar Room\, Department of Engineering
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