Effects of fibre bundle size and stitch pattern on the static
properties of unidirectional carbon-fibre non-crimp fabric
composites
Abstract: The use of Non-Crimp Fabrics (NCFs) as reinforcement in composites is
relatively new, but the use of this type of materials is expected to
increase a lot in the coming years. NCF-based composites can for example
replace the very costly use of prepreg tapes, but before this will occur,
the effect of stitching parameters, etc., on the performance of NCF-based
composites must be fully understood.
In the present report, the variation in static (tension and compression)
properties of unidirectional carbon-fibre NCF composites was studied as a
function of stitch pattern and fibre bundle size. By studying the effects of
stitch pattern and bundle size on the static properties, the aim was to be
able to determine the most important stitch parameters to obtain good
mechanical properties.
The results from the tests carried out show no big difference in properties
between the NCF-based composites examined. Further investigations are
therefore needed, with other types of fabrics (particularly different bundle
size), before any real conclusions can be made regarding the effect of
stitch pattern and bundle size on the mechanical properties of NCF-based
composites.
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