On-surface fibre-free zones and irregularity of piercing pattern in structurally stitched NCF preforms

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Koissin, Vitaly and Ruopp, Andreas and Lomov, Stepan V. and Verpoest, Ignaas and Witzel, Volker and Drechsler, Klaus (2006) On-surface fibre-free zones and irregularity of piercing pattern in structurally stitched NCF preforms. Advanced Composites Letters, 15 (3). pp. 81-88. ISSN 0963-6935

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Abstract:The paper addresses the surface imperfections (openings in fibrous plies) and irregularity of the piercing pattern in structurally stitched multilayer carbon-fibre preforms. Each layer is a multiaxial multiply non-crimp fabric (NCF) with a non-structural stitching. The term “structural” presumes here that the stitching yarn does not only consolidate the plies (as the non-structural one does) but forms also a through-the-thickness (3D) reinforcement. Four stitching methods are studied: ordinary CNC-sewing, tufting, dual-needle, and curved needle techniques with multifilament yarns: aramide (60 or 120 tex) or glass (204 tex). In total, 14 stitching cases are investigated experimentally. It is observed that a non-negligible variability exists in the meso-level geometry of the reinforcement. The geometrical characterization provides important input data for analysis of the permeability and mechanical properties of the preforms.
Item Type:Article
Copyright:© 2006 Woodhead Publishing
Faculty:
Engineering Technology (CTW)
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Link to this item:http://purl.utwente.nl/publications/75506
Official URL:http://www.acletters.org/abstracts/15_3_1.html
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