By Jinlian Hu,Textile Institute (Manchester, England)
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Extra info for 3-D fibrous assemblies: properties, applications and modeling of three-dimensional textile structures
In many cases, the tool will have only one side to produce a nice finish on the outside of the part. Hand lay-up can also be used to produce very large parts. As long as there are © Woodhead Publishing Limited, 2008 Applications of three-dimensional textiles 39 enough people to apply the resin to the fabric before it cures, there are really no limitations on the size of the part. Hand lay-up is currently the most utilized method of manufacture for large wind turbine blades. Unfortunately, there are also many disadvantages to hand lay-up.
They are often made balanced (equal weight on all axes) but can also be tailored to suit a particular load case, such as for a typical boat-bottom panel where bending occurs mostly in the transverse direction. In this case quads are designed with more 90° fibre than the other axis. The 0° orientation is called the warp system and corresponds to the work direction. , 2003). Stitch-bonded fabrics offer greater range and flexibility compared to woven fabrics, especially in the field of multiaxial (three plies or more).
25, the yarns are looped over a selvedge yarn at the bottom of the fibre array, which effectively binds the preform together. By changing the base plate, various 3-D shapes can be formed. , 2006). , 1994). 25 Non-woven fibre architecture. 26 Structure of Napco® 3-D non-woven fabric: 1 – top layer; 2 – bottom layer; 3 – connecting layer (bridge fibres from 1); 4 – bridge fibres from 2; 5 – needle stitch; 6 – distance between bridge fibres depending on stitch depth; 7 – distance between bridge fibres depending on needle density; 8 – take-out direction; 9 – product thickness depending on the spacer’s width.
3-D fibrous assemblies: properties, applications and modeling of three-dimensional textile structures by Jinlian Hu,Textile Institute (Manchester, England)