Influence of Temperature and Humidity on Flax Fiber-Reinforced Composites for Helicopter Structures Using Protective Coatings

Lukas Gaugelhofer, Jonas John, Manfred Hajek, Ilkay Yavrucuk

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

Abstract

With the aim of investigating whether sustainable and environmentally friendly flax fiber reinforced composites can meet the high technical requirements of aeronautical structures, this paper presents the influence of temperature and humidity on their structural-mechanical properties using protective coatings. Four coatings, two of which are partially bio-based, are tested on unidirectional flax fibers reinforced with bio-epoxy and polyfurfuryl alcohol resin. To simulate environmental conditions, coated and uncoated test panels are conditioned for two weeks in a climatic chamber at different temperature and humidity levels before their tensile specimens are tested and evaluated for moisture absorption, tensile strength, Young's modulus and fracture strain. The results show that higher temperatures lead to an increased moisture absorption rate and a lower maximum uptake. Higher relative humidity results in an increased maximum moisture uptake. A fossil-based coating could significantly reduce and retard moisture uptake at 30° C and 95 % relative humidity.

OriginalspracheEnglisch
TitelFORUM 2023 - Vertical Flight Society 79th Annual Forum and Technology Display
Herausgeber (Verlag)Vertical Flight Society
ISBN (elektronisch)9781713874799
PublikationsstatusVeröffentlicht - 2023
Veranstaltung79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023 - West Palm Beach, USA/Vereinigte Staaten
Dauer: 16 Mai 202318 Mai 2023

Publikationsreihe

NameFORUM 2023 - Vertical Flight Society 79th Annual Forum and Technology Display

Konferenz

Konferenz79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023
Land/GebietUSA/Vereinigte Staaten
OrtWest Palm Beach
Zeitraum16/05/2318/05/23

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