Influence of temperature and strain rate on the compressive behavior of PMMA and polycarbonate polymers
- Carl McElhinney
- Mike F.
- George T.
- Deanne J.
- William R.
Compression stress-strain measurements have been made on commercial polymethylmethacrylate (PMMA) and polycarbonate (PC) polymers as a function of tcmperature (-197 C to 220 C) and strain rate. A split-Hopkinson-pressure bar (SJIPU) was used to achieve strain rates of about 2500 s-' and a servohydraulic tester was used for lower strain rate testing (0.001 to 5 s-'). The mechanical response of these transparent polymers is quite different. The strength of PC is weakly dependent on strain rate, only moderately dependent on temperature, and remains ductile to -197OC. In contrast, the strength of PMMA is linearly dependent on temperature and strongly dependent on strain rate. Significantly, PMMA develops cracking and fails in compression with little ductility ( 7 4 % total strain) at either low strain rates and very low temperatures (-197OC) or at high strain rates and temperatures very near ambient.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 975554
- Report Number(s):
- LA-UR-01-3291; TRN: US201018%%742
- Resource Relation:
- Conference: Submitted to: 12th APS Topical Conference on Shock Compression of Condensed Matter, June 24-29, 2001, Atlanta, GA
- Country of Publication:
- United States
- Language:
- English
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