Abstract
A non-linear viscoelastic model comprised of two components, a rubber-like hyperelastic component and a viscoelastic time-dependent relaxation spectrum was used to model the behavior of semi-crystalline PP at rates and temperatures close to that found in the thermoforming process. Temperature dependence was introduced through time-temperature-superposition (TTS) using WLF. The hyperelastic constants were identified from equibiaxial tensile experimental tests while the time-dependent relaxation spectrum was characterized through a temperature-frequency sweep analysis from a strain controlled DMTA test. Results show that the developed model is capable of simulating the behavior of semi-crystalline PP fairly well.
Original language | English |
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Pages | 785-790 |
Number of pages | 6 |
Publication status | Published (in print/issue) - 14 Oct 2003 |
Event | 61st Annual Technical Conference ANTEC 2003 - Nashville, TN, United States Duration: 4 May 2003 → 8 May 2003 |
Conference
Conference | 61st Annual Technical Conference ANTEC 2003 |
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Country/Territory | United States |
City | Nashville, TN |
Period | 4/05/03 → 8/05/03 |
Keywords
- Biaxial
- Polypropylene
- Thermoforming
- Viscoelastic