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An experimental study of fibre waviness and its effects on compressive properties of unidirectional NCF composites
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Swerea, Swerea SICOMP AB.
GKN Aerospace Sweden AB, Sweden.
Chalmers University of Technology, Sweden.
2018 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 107, s. 665-674Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this paper a comprehensive experimental study on effects of different fibre waviness characteristics on the compressive properties of unidirectional non-crimp fabrics (NCF) composites is presented. The fibre waviness ranges from periodic to random with medium to large misalignment angles. As expected, fibre waviness is found to strongly impair the compressive mechanical properties of the composite. It is demonstrated that the maximum fibre misalignment alone can be used to accurately predict strength with analytical kinking criteria. Furthermore, there is a direct correlation between waviness and a knock-down factor on stiffness with approximately 5%/degree mean fibre misalignment angle. Analysis of the extension of the misaligned regions (defects) provides additional evidence that defect extension in the transverse direction is more critical than in the longitudinal direction, supporting earlier theoretical predictions in the open literature.

sted, utgiver, år, opplag, sider
2018. Vol. 107, s. 665-674
Emneord [en]
Carbon fibres, Fabrics/textiles, Microstructural analysis, Mechanical testing
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-33797DOI: 10.1016/j.compositesa.2018.02.013Scopus ID: 2-s2.0-85042490888OAI: oai:DiVA.org:ri-33797DiVA, id: diva2:1203941
Tilgjengelig fra: 2018-05-04 Laget: 2018-05-04 Sist oppdatert: 2019-01-07bibliografisk kontrollert

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