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SUMMARY:Instabilities in Elastic Layers - Dr John Biggins\, TCM Group\, Ca
 vendish Laboratory  / Trinity Hall 
DTSTART:20121018T131500Z
DTEND:20121018T134500Z
UID:TALK41112@talks.cam.ac.uk
CONTACT:Dr G Moller
DESCRIPTION:I will introduce two instabilities that occur in highly\nelast
 ic layers. In the first the layer is confined between and bonded\nto two r
 igid bodies which are then separated. At a critical separation\nfingers of
  air protrude into the elastic layer from its boundary in a\nway reminisce
 nt of Saffman-Taylor fingering in confined viscous\nfluids. In the second 
 the elastic layer is bonded to a rigid substrate\nand then caused to grow 
 (or swell). The growth leads to substantial\ncompression on the free surfa
 ce and\, at a critical degree of\ncompression\, the surface develops sulci
 . I will explore the patterns\nformed by these sulci and explain why the t
 ransition to the sulcal\nstate has so far eluded theoretical explanation.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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