Titel
Solid epoxy resin systems for automated composite manufacturing
Anthony D. Evans
Composites Research Group, Faculty of Engineering, University of Nottingham
... show all
Abstract
Thermosetting resins were formulated by mixing solid epoxy components, hardener and accelerator at elevated temperature. These mixtures were ground into uncured, solid resin powders and dispensed onto carbon fibres using a powder printer prior to vacuum curing. Using accelerators reduced curing time from 8 h to 16 min. Manufactured cross-ply carbon fibre laminates (0°/90°/0°) had comparable mechanical properties to composites manufactured using a liquid resin system. Tack behaviour of solid epoxy resin formulations was investigated and results compared to a conventional liquid resin system. Master curves of the storage and loss moduli of both solid and liquid resin formulations were generated by applying time-temperature superposition to shear moduli between 1 and 100 rad/s at multiple temperatures. This approach was used to determine optimum processing parameters to enable resin tack for automated fibre placement, demonstrating the importance of temperature control with respect to deposition rates.
Stichwort
Laminates (A)Carbon fibres (A)Structural composites (A)Cure behaviour (B)
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1218063
Erschienen in
Titel
Composites Part A: Applied Science and Manufacturing
Band
142
ISSN
1359-835X
Erscheinungsdatum
2021
Publication
Elsevier BV
Erscheinungsdatum
2021
Zugänglichkeit
Rechte
Rechteangabe
© 2020 The Author(s)
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