3-D fibrous assemblies: properties, applications and by Jinlian Hu,Textile Institute (Manchester, England)

By Jinlian Hu,Textile Institute (Manchester, England)

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Additional resources for 3-D fibrous assemblies: properties, applications and modeling of three-dimensional textile structures

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A woven structure in which the multilayer warp moves between the top and bottom of the material, thus providing x and y directions at an angle of 45°, and with weft yarns crossing between the warp providing the z direction, is shown in Fig. 12(b). In general, a variety of 3-D structures can be accomplished. For example, the warp yarns can go only part-way across the whole material (Fig. 13(a)), or one set of warp yarns can be introduced in the axial direction and one set angled, thus providing yarns in four different directions (Fig.

Theoretically, the MWK can be made to as many layers of multiaxial yarns as needed, but current commercially available machines allow four layers (the Mayer system) of 0°, 90°, ±q for insertion yarns, or at most eight layers (the LIBA system) of 0°, 90°, three (±q) insertion yarns, to be stitched together. All layers of insertion yarns are placed in perfect order each on top of the other in the knitting process. Each layer shows the uniformity of the uncrimped parallel © Woodhead Publishing Limited, 2008 Introduction to three-dimensional fibrous assemblies 19 yarns.

20. Multiaxial multi-plies have versatile properties such as drawn thread orientation, different angles between the layers, manifold layer composition and arbitrary mass. A stitch-bonded multiaxial multi-ply consists of several layers of reinforcing threads and a mesh structure – the warp knit. Up to eight layers can be combined with the orientation of the layers arranged as necessary (for example 0°, 90°, +45°, −45°: Fig. 21). 20 Stitch-bonded multiaxial multi-ply. 21 Stitch-bonded quadraxial fabric.

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