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Abstract
The deformability of a textile fabric (as received, or with in-situ grown carbon nano-fibres, or with a thermal treatment) is studied experimentally using bending, compression, in-plane shear, and friction. These tests reveal that the in-situ grown carbon nano-fibres can significantly deteriorate the fabric deformability, except for a low mass fraction. Therefore, the optimal mass fraction should be chosen for a particular production case, to obtain a compromise between improved strength of a composite part (expected to increase after the nano-fibre growth) and decreased deformability of the preform.
Highlights
IntroductionWhen producing or modelling three-dimensionally shaped textile composites, deformability of the fabric is a crucial is-
When producing or modelling three-dimensionally shaped textile composites, deformability of the fabric is a crucial is-One of these possible treatments applied to carbon-fibre fabrics is the in-situ growth of carbon nanotubes (CNTs) or nanofibres (CNFs) on the surface of microfibres [2]
Due to various types of fabrics, yarns, fibres, as well as their numerous combinations and treatments, this research line seems to be endless
Summary
When producing or modelling three-dimensionally shaped textile composites, deformability of the fabric is a crucial is-. V f 1⁄4 100*W*N =ðt*ρÞ; where W is areal weight (285 g/m2, CNFs are not accounted for), N is the number of plies, t is the gap between the loading plates (corrected for compliance), and ρ is the fibre density (1.78 g/cm3) These figures reveal a consistent decrease of compressibility (or, in other words, increase of the fabric thickness) for a given pressure after grafting. The thickness (and Vf) was measured in-situ and corrected for the compliance measured in-situ at the same testing regime (temperature, displacement rate,..) Since the friction force can be considered proportional to the contact surface, the friction coefficient decreases with the normal load [19]
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