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SUMMARY:Shocking temperatures. 2: What did we get? - Alyssa Picard\, SMF G
 roup\, Cavendish Laboratory
DTSTART:20150521T153000Z
DTEND:20150521T160000Z
UID:TALK59227@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:The temperature rise associated with shock waves has not been 
 extensively covered in the existing literature. The extreme conditions of 
 a material under shock as well as the very brief window of time available 
 to collect the temperature data mean that successful measurements thus far
  have been few and far between—and those available are in disagreement a
 t higher shock pressures. This year\, we have been working to develop ultr
 a-fast temperature sensors that can be embedded in polymers (in this case 
 PMMA) dynamically compressed to several GPa\, which provide data on the te
 mperature rise within the timeframe of the shock. These sensors consist of
  thin-film thermistors (of gold or tungsten) designed to rapidly thermally
  equilibrate with the embedding polymer under the application of shock. Th
 e resistance data collected from the sensors allows for the calculation of
  the surrounding temperature.\n\nIn this talk I will review the results fr
 om our PMMA shock temperature experiments. These results will be compared 
 with the data already available in the literature\, and help resolve the l
 ongstanding discrepancies. They will also be compared with the polymer tem
 perature predictions derived from group interaction modeling (as covered i
 n David Williamson’s talk earlier this year)\, as well as with the resul
 ts of heat conduction simulations conducted using finite element analysis.
LOCATION:Small Lecture Theatre\, Bragg Building\, Cavendish Laboratory
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