BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:The working of ductile metals and the doctrine of maximum entropy 
 - Mick Brown\, Cavendish Laboratory
DTSTART:20130214T160000Z
DTEND:20130214T170000Z
UID:TALK41448@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:The work-hardening of metals exhibits a precursor phase\, a se
 lf-organised-critical phase\, and an exhaustion phase\; occasionally\, eve
 n a born-again phase. All of these involve intermittent flow and symmetry 
 breaking. One can relate this to coarse-grained engineering variables such
  as plastic strain show an 'infinitesimal' increment large enough to keep 
 the system always in a critical state. A repeated theme in understanding a
 ll of these is the tendency for complex mechanical systems to maximise the
  number of pathways available in response to large external forces. This i
 s the doctrine of maximum entropy defined as a smoothed extensive thermody
 namic quantity. The entropy is maximised subject always to the constraint 
 of what processes are possible according to mechanics and the boundary con
 ditions.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
END:VEVENT
END:VCALENDAR