SHIFT FACTOR DEPENDENCE ON PHYSICAL AGING AND TEMPERATURE FOR VISCOELASTIC RESPONSE OF POLYMERSShow others and affiliations
2022 (English)In: ECCM 2022 - Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability, Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL) , 2022, p. 431-438Conference paper, Published paper (Refereed)
Abstract [en]
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.
Place, publisher, year, edition, pages
Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL) , 2022. p. 431-438
Keywords [en]
numerical simulations, Physical aging, shift factors, stress relaxation, viscoelasticity, Polymer matrix composites, Temperature, Long term performance, matrix, Physical temperature, Polymeric resin, Reinforced composites, Viscoelastic response, Viscoelastics, Viscoplastic response
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:ri:diva-64800Scopus ID: 2-s2.0-85149180303ISBN: 9782970161400 (print)OAI: oai:DiVA.org:ri-64800DiVA, id: diva2:1756802
Conference
20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022, 26 June 2022 through 30 June 2022
Note
Funding details: Swedish Foundation for International Cooperation in Research and Higher Education, STINT; Funding details: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES; Funding details: Kempestiftelserna, SMK-1738; Funding details: European Regional Development Fund, ERDF; Funding text 1: The authors would like to thank “Post-doctoral Research Aid” of the Specific Aid Objective of the Operational Programme “Growth and Employment” (project No. 1.1.1.2/VIAA/4/20/641), Higher Education Improvement Coordination (CAPES/Brazil), The Swedish Foundation for International Cooperation in Research and Higher Education (STINT) and Kempestiftelserna with funding reference SMK-1738 and ERDF within the Activity 1.1.1.2 for their financial support.; Funding text 2: Higher Education Improvement Coordination (CAPES/Brazil), The Swedish Foundation for International Cooperation in Research and Higher Education (STINT) and Kempestiftelserna with funding reference SMK-1738 and ERDF within the Activity 1.1.1.2 for their financial support.
2023-05-152023-05-152023-05-15Bibliographically approved