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- W4287081622 abstract "Fractional calculus has been proved to be very effective in representing the visco-elastic relaxation response of materials with memory such as polymers. Moreover, in modelling the temperature dependency of the material functions in thermo-visco-elasticity, the standard time-temperature superposition principle is known to be ineffective in most of the cases (thermo-rehological complexity). In this work, a novel finite element formulation and numerical implementation is proposed for the simulation of transient thermal analysis in thermo-rehologically complex materials. The parameters of the visco-elastic fractional constitutive law are assumed to be temperature dependent functions and an internal history variable is introduced to track the changes in temperature which are responsible for the phase transition of the material. The numerical approximation of the fractional derivative is employed via the so called Grunwald-Letnikov approximation. The proposed model is used to numerically solve some test cases related to relaxation and creep tests conducted on a real polymer (Etylene Vynil Acetate), which is used as the major encapsulant of solar cells in photovoltaics." @default.
- W4287081622 created "2022-07-25" @default.
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- W4287081622 date "2021-07-09" @default.
- W4287081622 modified "2023-09-27" @default.
- W4287081622 title "A computational framework for rheologically complex thermo-visco-elastic materials" @default.
- W4287081622 doi "https://doi.org/10.48550/arxiv.2107.08796" @default.
- W4287081622 hasPublicationYear "2021" @default.
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