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Investigation of Fibre Volume Fraction as Key Parameter in Cryogenic Hydrogen Tank Development

Appels, Jonas (2024) Investigation of Fibre Volume Fraction as Key Parameter in Cryogenic Hydrogen Tank Development. DLR-Interner Bericht. DLR-IB-SY-SD-2025-4. Masterarbeit. TU Delft. 132 S.

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Kurzfassung

In developing Type V hydrogen tanks for energy storage and propulsion in commercial airliners, the key design criterion is maintaining tightness under cryogenic conditions. A concern is that anomalies in the laminate could cause microcracks which compromise the tightness. This study examined how resin flow, caused by an expanding mould during curing, creates a gradient in the local fibre volume fraction (FVF) across the laminate. The impact of resin system selection, autoclave cycle parameters, mandrel material, and fibre tension on the FVF gradient was investigated. Cylindrical specimens were manufactured in a process replicating automated fibre placement (AFP), with a piezoelectric sensor measuring contact pressure at the mandrel-laminate interface during the autoclave cycle as an indicator of resin flow and FVF spread. Significant correlations were found between resin flow and all parameters except fibre tension. The resin’s viscosity profile and gelation characteristics had the most substantial impact on the FVF spread. Resins with high viscosity and short gelation times lowered the FVF spreads the most. Mandrel materials with lower thermal expansion coefficients (CTE) also reduced FVF gradients, though to a lesser extent. Adjusting the autoclave cycle to lower temperatures for longer periods resulted in the least significant reduction in FVF spread; however, this approach holds high potential for further improvement if more data on resin rheology and cure kinetics are available to optimise the autoclave cycle. These findings provide valuable insights for minimising FVF gradients in the design of carbon fibre-reinforced polymer (CFRP) tanks for liquid hydrogen.

elib-URL des Eintrags:https://elib.dlr.de/212374/
Dokumentart:Berichtsreihe (DLR-Interner Bericht, Masterarbeit)
Zusätzliche Informationen:Betreuer: Philipp Sämann, Dr.-Ing. Daniel Stefaniak
Titel:Investigation of Fibre Volume Fraction as Key Parameter in Cryogenic Hydrogen Tank Development
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Appels, JonasTU DelftNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:3 September 2024
Open Access:Nein
Seitenanzahl:132
Status:veröffentlicht
Stichwörter:Type-V, cryogenic, microcracks, FVF, resin, autoclave, mandrel, piezoelectric, CFRP, hydrogen, Typ-V, kryogen, Mikrorisse, FVA, Harz, Autoklav, Dorn, Piezosensor, CFK, Wasserstoff
Institution:TU Delft
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Umweltschonender Antrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CP - Umweltschonender Antrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Werkstoffe und Herstellverfahren
Standort: Stade
Institute & Einrichtungen:Institut für Systemleichtbau > Produktionstechnologien SD
Hinterlegt von: Schlegel, Linda
Hinterlegt am:29 Jan 2025 15:39
Letzte Änderung:29 Jan 2025 15:39

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