Prestressed natural fibre spun yarn reinforced polymer-matrix composites

We report that a prestressing technique similar to that traditionally used in prestressed concrete can improve the mechanical performance of flax fibre spun yarn reinforced polymer-matrix composites. Prestressing a low twist yarn not only introduces tension to the constituent fibres and compressive...

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Bibliographic Details
Published in:Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2015-08, Vol.75, p.68-76
Main Authors: Zaidi, Badar Munir, Magniez, Kevin, Miao, Menghe
Format: Article
Language:English
Subjects:
A. Polymer-matrix composites (PMCs)
B. Internal friction/damping
B. Porosity
Compressive properties
E. Cure
Fibers
Fibre
Fibres
Mechanical properties
Prestressing
Straightening
Yarns
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Summary:We report that a prestressing technique similar to that traditionally used in prestressed concrete can improve the mechanical performance of flax fibre spun yarn reinforced polymer-matrix composites. Prestressing a low twist yarn not only introduces tension to the constituent fibres and compressive stress to the matrix similar as in prestressed concretes, but also causes changes to the yarn structure that lead to the rearrangement of fibres within the yarn. Prestressing increases the fibre packing density in yarn, causes fibre straightening, and reduces fibre obliquity in yarn (improved fibre alignment along yarn axis). All these changes contribute positively to the mechanical properties of the natural fibre yarn reinforced composites.
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2015.04.021