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SUMMARY:Pressure\, Rate\, and Temperature Effects on Mechanical Properties
  in Polymethylmethacrylate (PMMA) - Jennifer Jordan\, Editor-in-Chief\, Jo
 urnal of Dynamic Behavior of Materials
DTSTART:20230929T140000Z
DTEND:20230929T150000Z
UID:TALK203287@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:Polymer mechanics depend on the superposition of pressure\, te
 mperature\, and strain rate\; underlying polymer structure\; and processin
 g and aging.  The objective of this research is to understand the pressure
 \, temperature\, and rate effects on mechanical properties in polymethylme
 thacrylate (PMMA).  Time-temperature-pressure effects are investigated usi
 ng dynamic mechanical analysis (DMA)\, quasi-static compression\, split Ho
 pkinson pressure bar (SHPB)\, and large volume press.  These techniques al
 low for independent variation of pressure\, strain rate\, and temperature.
  The results of these experiments are compared using time-temperature-rate
  superposition.  Additionally\, a study by Bat’kov\, et al. revealed a d
 ramatic decrease in PMMA shear strength above 6 GPa under shock loading.  
 Planar shock loading  using gas gun drive was used to understand this phen
 omenon\, in contrast to Bat’kov\, et al. who used explosive loading.  Th
 e first lateral manganin gauge experiment over 6 GPa using gas gun loading
  revealed a similar trend to that observed by Bat’kov.  
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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