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Prediction of forming effects in UD-NCF by macroscopic forming simulation – Capabilities and limitations

Kärger, Luise; Galkin, Siegfried ORCID iD icon; Kunze, Eckart; Gude, Maik; Schäfer, Bastian

Abstract (englisch):
Unidirectional non-crimp fabrics (UD-NCF) provide the highest lightweight potential among dry textile materials. Compared to multiaxial NCF, the fabric layers in UD-NCF enable a more targeted tailoring. Compared to woven fabrics, the fibres of UD-NCF are straight without weakening undulations. However, the formability of UD-NCF is more challenging compared to woven fabrics. The yarns are bonded by a stitching and the deformation behaviour highly depends on this stitching and on the slippage between the stitching and the fibre yarns. Moreover, distinct local draping effects occur, like gapping and fibre waviness, which can have a considerable impact on the mechanical performance. Such local effects are particularly challenging or even impossible to be predicted by macroscopic forming simulation. The present work applies a previously published macroscopic UD-NCF modelling approach to perform numerical forming analyses and evaluate the prediction accuracy of forming effects. In addition to fibre orientations and shear angles, as investigated in previous work, the present work also provides indication for fibre area ratios, gapping, transverse compaction and fibre waviness. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000133747
Veröffentlicht am 10.06.2021
Originalveröffentlichung
DOI: 10.25518/esaform21.355
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Proceedingsbeitrag
Publikationsmonat/-jahr 04.2021
Sprache Englisch
Identifikator ISBN: 978-2-87019-002-9
KITopen-ID: 1000133747
Erschienen in ESAFORM 2021 - 24th International Conference on Material Forming
Veranstaltung 24th International Conference on Material Forming (ESAFORM 2021), Online, 14.04.2021 – 16.04.2021
Verlag ULiège Library
Bemerkung zur Veröffentlichung "The 24th International ESAFORM Conference on Material Forming - ESAFORM 2021 - is organized by Anne-Marie Habraken from University of Liège, Belgium, between 14th and 16th April, 2021 as a digital event." -
Vorab online veröffentlicht am 29.03.2021
Schlagwörter non-orthogonal material modelling; non-crimp fabrics; draping effects; gapping; waviness;
Nachgewiesen in Dimensions
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