Flexibility of three differential constitutive models evaluated by large amplitude oscillatory shear and Fourier transform rheology
| Autor: | Jana Zelenkova, Petr Filip, Radek Pivokonsky |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010304 chemical physics
Polymers and Plastics Chemistry Organic Chemistry Mathematical analysis Mineralogy 01 natural sciences Signal 010305 fluids & plasmas Exponential function Stress (mechanics) symbols.namesake Amplitude Fourier transform Rheology Harmonics 0103 physical sciences Materials Chemistry symbols Differential (mathematics) |
| Zdroj: | Polymer. 104:171-178 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2016.09.014 |
| Popis: | Using Fourier transform rheology the Giesekus, exponential Phan-Tien and Tanner, and modified eXtended Pom-Pom constitutive models were examined in the non-linear regime represented by large amplitude oscillatory shear (LAOS) measurements. For the experiments a 5 wt% solution of poly(ethylene oxide) (molecular weight 1000 kg/mol) solved in dimethyl sulfoxide was used. The minimal number of harmonics required for an adequate reconstruction of the original raw time-stress signal was shown. An emphasis was paid to simultaneous consideration of the normalised stress magnitudes and the phases of individual harmonics in the fitting procedure adjusting the non-linear parameters of the studied constitutive models. |
| Databáze: | OpenAIRE |
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