A Study On Mechanical Properties Of Hybrid Kenaf/Kevlar Fibre Reinforced Thermoplastic Composites

Ng, Cher Sean (2018) A Study On Mechanical Properties Of Hybrid Kenaf/Kevlar Fibre Reinforced Thermoplastic Composites. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) A Study On Mechanical Properties Of Hybrid Kenaf Kevlar Fibre Reinforced Thermoplastic Composites.pdf - Submitted Version Download (518kB)

Abstract

Nowadays, many applications focus on the cost and the performance of the materials. A material which can be recycled and reused is preferable compared to other. A hybrid composite which consists of two or more different fibres in a single matrix has become an interesting topic in the field of fibre reinforced composite. In this project, the woven kenaf fibre and Kevlar fibre along with thermoplastic matrix polypropylene were used to fabricate hybrid composites. Different stacking sequence of composite laminates structures were introduced, which include kenaf/kenaf/kenaf [K/K/K], kenaf/Kevlar/kenaf [K/KV/K], Kevlar/kenaf/Kevlar [KV/K/KV] and Kevlar/Kevlar/Kevlar [KV/KV/KV]. Tensile, quasi-static indentation and low-velocity impact tests were carried out to investigate the effect of fibre configurations on the mechanical and indentation properties of hybrid kenaf/Kevlar fibre reinforced polypropylene composites. The ultimate tensile strength of [KV/K/KV] was found to be higher than [K/KV/K] by 71% whereas Young’s Modulus of [KV/K/KV] was also higher than [K/KV/K] by 41%. Quasi-static indentation test was conducted and the result showed that [KV/KV/KV] can withstand the highest load followed by [KV/K/KV], [K/KV/K] and lastly [K/K/K]. Moreover, the low-velocity impact test was carried out using Instron drop tower impact system. The specimens were tested at different impact energy levels. The result showed the non-hybrid kenaf composites were weak against impact while hybridizing the kenaf fibre with Kevlar fibre, the result was significantly different.

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