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Relation between Structural Anisotropy in Natural Fibres and Mechanical Properties in Composites

This chapter will review natural fibres and composite properties, emphasising the co-relation between the structural anisotropy of natural fibres and mechanical properties in composites. The importance and applications of natural fibre composites will also be discussed. As a result of the increasing demand for environmentally friendly materials and the desire to reduce the cost of traditional fibres (carbon, glass and aramid), reinforced petroleum-based composites and new bio-based composites have been developed. The selection of suitable fibres is determined by the required values of stiffness and tensile strength of a composite. Further criteria for the choice of suitable reinforcing fibres include the following: elongation at failure, thermal stability, adhesion of the fibres and matrix, dynamic behaviour, long-term behaviour and price and processing costs. A very important factor to consider is the effect of anisotropy in composites reinforced with natural fibres, i.e., the mechanical properties depend on the direction in which a force is applied. The fibres adopt a particular orientation under loading, which is responsible for the stiffness composites along the direction of flow. The mechanical performance of composites is mainly dependent on the properties of the matrix and reinforcement and the interaction between the matrix and reinforcement.

Publication details

Print publication date
19 Sep 2012
Copyright year
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From the book series:
Green Chemistry Series