Investigation on the creep behavior of PA6 film based on the fractional differential model
| Autor: | Liu Yi, Guangkai Liao, Yu Dong, Xiaochao Liu, Rao Fu, Yuejun Liu, Shuhong Fan, Xianggang Li |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics 02 engineering and technology Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Creep Polyamide Materials Chemistry Composite material Fractional differential 0210 nano-technology |
| Zdroj: | Journal of Elastomers & Plastics. 53:599-611 |
| ISSN: | 1530-8006 0095-2443 |
| Popis: | A fractional Burgers model was proposed to investigate the creep behavior of Polyamide 6 (PA6) film. The creep tests at various conditions were conducted on dynamic mechanical analysis (DMA) tester, and the strain-time ( ∊- t) curves of deformation were analyzed by the derived model. The results indicated that the fractional Burgers model had a better performance than the classical integer-order model in simulating the deformation of PA6 film. Parameters analysis showed that the stress facilitated the transformation from viscoelastic deformation to the viscoplastic one under ambient condition. Whereas, at the state of higher temperature, the deformation could be directly activated as the viscoplastic deformation. The softening effect of PA6 film was found to be related to the expansion of viscoplastic units during stretching. Also, the fluidity of the viscoelastic units was greater than that of the viscoplastic units. Through the analysis of dynamic rheological parameters, we speculated that the variation of loss factor may come from the evolution of viscoelastic units. |
| Databáze: | OpenAIRE |
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