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SUMMARY:Swelling and Shaping of Soft Structures - Douglas Holmes (Boston U
 niversity)
DTSTART:20170919T135000Z
DTEND:20170919T141000Z
UID:TALK80161@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Swelling-induced   deformations of slender structures occur in
  many biological and industrial   environments\, and the shapes and patter
 ns that emerge can vary across many   length scales. The dynamics of fluid
  movement within elastic networks\, and   the interplay between a structur
 e&#39\;s geometry and its boundary conditions\,   play a crucial role in t
 he morphology of growing tissues\, the shrinkage of   mud and moss\, and t
 he curling of cartilage\, leaves\, and pine cones. We aim to   utilize swe
 lling-induced deformations of soft mechanical structures to   dynamically 
 shape materials. Adaptive structures that can bend and fold in an   origam
 i-like manner provide advanced engineering opportunities for deployable   
 structures\, soft robotic arms\, mechanical sensors\, and rapid-prototypin
 g of   3D elastomers. Swelling is a robust approach to structural change a
 s it   occurs naturally in humid environments and can easily be adapted in
 to   industrial design. Small volumes of fluid that interact favorably wit
 h a   material can induce large\, dramatic\, and geometrically nonlinear  
  deformations. This talk will examine the geometric nonlinearities that oc
 cur   as slender structures are swollen &ndash\; surfaces will crease\, be
 ams will bend and   snap\, circular plates will warp and twist\, and fiber
 s will coalesce and   detach. I will describe the intricate connection bet
 ween materials and   geometry\, and present a straightforward means to per
 manently morph 2D sheets   into 3D shapes.
LOCATION:Seminar Room 1\, Newton Institute
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