Shift Factor Dependence on Physical Aging and Temperature for Viscoelastic Response of Polymers
Composites Meet Sustainability: Proceedings of the 20th European Conference on Composite Materials (ECCM20). Vol.1: Materials 2022
Stephanie Goncalves Nunes, Sibin Saseendran, Patrik Fernberg, Emami Nazanin, Antonella Esposito, Sandro Amico, Jānis Vārna

As polymeric resins are used as matrix in reinforced composites, understanding of their viscoelastic-viscoplastic response is critical for long-term performance design. However, during service life, thermosets are not in a thermodynamic equilibrium state, resulting in physical aging, which affects failure and viscoelastic (VE) properties, becoming a concern for industries. In this paper, an alternative methodology for testing and parameter determination for aging polymer, at different temperatures (TA) and times (tA), is proposed. The experimental data analysis was performed using a Schapery's type thermo-aging-rheologically simple VE model with constant coefficients in Prony series and the effect of temperature and aging included by two shift factors (aT, aA). Results showed that the shift factor can be presented as the product of shifts aT and aA. Furthermore, for short tA the change rate of the aA with tA does not depend on TA, whereas for long tA at high TA the rate increases.


Atslēgas vārdi
numerical simulations; Physical aging; shift factors; stress relaxation; viscoelasticity
DOI
10.5075/epfl-298799_978-2-9701614-0-0
Hipersaite
https://infoscience.epfl.ch/entities/publication/ceba6a39-6b21-4fb1-9e9c-9c51c63b9a97

Goncalves Nunes, S., Saseendran, S., Fernberg, P., Nazanin, E., Esposito, A., Amico, S., Vārna, J. Shift Factor Dependence on Physical Aging and Temperature for Viscoelastic Response of Polymers. No: Composites Meet Sustainability: Proceedings of the 20th European Conference on Composite Materials (ECCM20). Vol.1: Materials, Šveice, Lausanne, 26.-30. jūnijs, 2022. Lausanne: Composite Construction Laboratory (CCLab), 2022, 431.-438.lpp. ISBN 978-2-9701614-0-0. Pieejams: doi:10.5075/epfl-298799_978-2-9701614-0-0

Publikācijas valoda
English (en)
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