%0 Journal Article %1 so75506 %A Koissin, Vitaly %A Ruopp, Andreas %A Lomov, Stepan V. %A Verpoest, Ignaas %A Witzel, Volker %A Drechsler, Klaus %D 2006 %I Woodhead Publishing %J Advanced Composites Letters %K NCF analysis characterisation composite geometrical hlrs quality stitching structural textile %N 3 %P 81--88 %T On-surface fibre-free zones and irregularity of piercing pattern in structurally stitched NCF preforms %U http://doc.utwente.nl/75506/ %V 15 %X 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.

@article{so75506, 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.}, added-at = {2015-11-12T13:51:01.000+0100}, author = {{Koissin}, Vitaly and {Ruopp}, Andreas and {Lomov}, Stepan V. and {Verpoest}, Ignaas and {Witzel}, Volker and {Drechsler}, Klaus}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/21bebbf1e76e2579c7fbb2a9ed78759aa/andreasruopp}, interhash = {bba42fabaa20d63e17e510ab91947d98}, intrahash = {1bebbf1e76e2579c7fbb2a9ed78759aa}, journal = {Advanced Composites Letters}, keywords = {NCF analysis characterisation composite geometrical hlrs quality stitching structural textile}, number = 3, pages = {81--88}, publisher = {Woodhead Publishing}, timestamp = {2015-11-13T10:14:10.000+0100}, title = {On-surface fibre-free zones and irregularity of piercing pattern in structurally stitched NCF preforms}, url = {http://doc.utwente.nl/75506/}, volume = 15, year = 2006 }