A formulation of the cooperative model for the yield stress of amorphous polymers for a wide range of strain rates and temperatures
The mechanical response of solid amorphous polymers is strongly dependent on the temperature and strain rate. More specifically, the yield stress increases dramatically for the low temperatures as well as for the high strain rates. To describe this behavior, we propose a new formulation of the coope...
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| Veröffentlicht in: | Polymer (Guilford) 2005-07, Vol.46 (16), p.6035-6043 |
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| creator | Richeton, J. Ahzi, S. Daridon, L. Rémond, Y. |
| description | The mechanical response of solid amorphous polymers is strongly dependent on the temperature and strain rate. More specifically, the yield stress increases dramatically for the low temperatures as well as for the high strain rates. To describe this behavior, we propose a new formulation of the cooperative model of Fotheringham and Cherry where the final mathematical form of the model is derived according to the strain rate/temperature superposition principle of the yield stress. According to our development, the yield behavior can be correlated to the secondary relaxation and we propose an extension of the model to temperatures above the glass transition temperature. For a wide range of temperatures and strain rates (including the impact strain rates), the predicted compressive yield stresses obtained for the polycarbonate (PC) and the polymethylmethacrylate (PMMA) are in excellent agreement with the experimental data found in the literature. |
| doi_str_mv | 10.1016/j.polymer.2005.05.079 |
| format | Article |
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| ispartof | Polymer (Guilford), 2005-07, Vol.46 (16), p.6035-6043 |
| issn | 0032-3861 1873-2291 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Amorphous polymers Applied sciences Exact sciences and technology Mathematical Physics Mechanical properties Mechanics Mechanics of materials Modeling Organic polymers Physicochemistry of polymers Physics Properties and characterization Yield stress |
| title | A formulation of the cooperative model for the yield stress of amorphous polymers for a wide range of strain rates and temperatures |
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