Stress-Strain Response of PMMA as a Function of Strain-Rate and Temperature

  • Paul Moy
  • C. Allan Gunnarsson
  • Tusit Weerasooriya
  • Wayne Chen
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The strain rate response of PMMA was investigated under uniaxial compression at room temperature at strain-rates ranging from 0.0001/sec to about 4300/sec. In addition, the temperature response of PMMA was investigated at strain-rates of 1/sec and 0.001/sec at temperatures ranging from 0°C to 115°C (below Tg). High rate experiments at room temperature (greater than 1/sec rates) were conducted using a split-Hopkinson Pressure bar (SHPB) with pulse-shaping. This is necessary to induce a compressive loading on the specimen at a constant strain rate to achieve dynamic stress equilibrium. Results conducted at room temperature show that PMMA is strain rate sensitive from quasi-static to dynamic loading. Additionally, the stress-strain response exhibits a decrease in the flow stress with an increase in temperature. These experimental data are being used to develop constitutive behavior models of PMMA.

Keywords

Petroleum Polyethylene Epoxy Brittle Tungsten 

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Copyright information

© The Society for Experimental Mechanics, Inc. 2011

Authors and Affiliations

  • Paul Moy
    • 1
  • C. Allan Gunnarsson
    • 1
  • Tusit Weerasooriya
    • 1
  • Wayne Chen
    • 2
  1. 1.Army Research LaboratoryWeapons and Materials Research DirectorateAberdeenUSA
  2. 2.School of Aeronautics and Astronautics and School of Materials EngineeringPurdue UniversityWest LafayetteUSA

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