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The effect of short carbon fibers on viscoelastic behavior of UHMWPE
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. Riga Technical University, Institute of Mechanics and Mechanical Engineering, Latvia.ORCID iD: 0000-0001-6457-4028
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-8676-8819
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Riga Technical University, Institute of Mechanics and Mechanical Engineering, Latvia.ORCID iD: 0000-0001-9649-8621
2022 (English)In: ECCM 2022 - Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability / [ed] Vassilopoulos, Anastasios; Michaud, Véronique, Lausanne: EPFL Lausanne, Composite Construction Laboratory , 2022, Vol. 1, p. 314-321Conference paper, Published paper (Other academic)
Abstract [en]

At service temperatures, ultra-high molecular weight polyethylene (UHMWPE) is a highly viscoelastic (VE) material due to its low glass transition temperature (≈-113 °C). Since the mechanical response changes over time, the ability to predict and improve its performance over lifetime is an engineering concern. Adding short carbon fibers (SCF) as reinforcement (10 wt%) is expected to improve the material instant and long-term properties. VE relaxation functions for UHMWPE and composite at different temperatures (25-100 °C) are obtained from experimental data used to find parameters in a Schapery's type linear VE model. Then, relaxation functions of the SCF (randomly distributed) composite are predicted using the quasi-elastic approach. The results show that fibers affect positively the VE properties of UHMWPE and that the temperature- and time-dependent matrix behavior affects the stress transfer to fibers However, due to uncertainty regarding the input parameters, limiting the applicability of the chosen quasi-elastic approach, the quantitative agreement is not perfect.

Place, publisher, year, edition, pages
Lausanne: EPFL Lausanne, Composite Construction Laboratory , 2022. Vol. 1, p. 314-321
Keywords [en]
quasi-elastic approach, reinforced thermoplastic, stress relaxation, viscoelasticity
National Category
Composite Science and Engineering
Research subject
Machine Elements; Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-95875DOI: 10.5075/epfl-298799_978-2-9701614-0-0Scopus ID: 2-s2.0-85149176225ISBN: 978-2-9701614-0-0 (electronic)OAI: oai:DiVA.org:ltu-95875DiVA, id: diva2:1743332
Conference
20th European Conference on Composite Materials (ECCM20), June 26-30, 2022, Lausanne, Switzerland
Funder
The Kempe Foundations, SMK-1738
Note

Funder: ERDF; "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)

Available from: 2023-03-14 Created: 2023-03-14 Last updated: 2023-03-14Bibliographically approved

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Gonçalves Nunes, StephanieEmami, NazaninVarna, Janis

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