Performances of axial energy absorptions of cylindrical woven kenaf fiber reinforced polyester composites

Abdullah, Noorhaslinda (2017) Performances of axial energy absorptions of cylindrical woven kenaf fiber reinforced polyester composites. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Natural fibers more affordable than synthetic fibers and can be replaced in many applications in which its cost efficiency outweighs the high composite performance requirements. Nowadays, researchers usually use natural fibers in their research to investigate whether natural fibers can be used to replace non-biodegrable materials. This work presents an investigation on a composite that was reinforced with Kenaf fiber, also known as Kenaf Fibre Reinforced Polyester (KFRP), which capable of absorbing energy. This research focuses on the method of fabricating cylindrical composite tubes reinforced with polyester using kenaf. Four different fiber orientations such as 0ᵒ, 15ᵒ, 30ᵒ, and 45ᵒ were used. The numbers of layers used were two, three and four layers. Later, the cylindrical tubes were compressed quasi-statically using a constant cross-head vs. displacement at 5 mm/min. The force versus displacement curves were obtained and the areas under the curve representing the energy absorption performance were determined. The observations of the crushing mechanism were viewed in three stages, the first stage was the pre-crush response of the specimen terminated by the initiation of failure in the material. In the second stage, which is the post-crush stage, failure spreaded across the entire specimen, which was characterised by the average crush load. During the final stage, the specimen became compact and the load increased sharply until the end of the test. In conclusion, the ideal number of layers was four layer whereas 15ᵒ was shown to be the optimum fiber orientation for KFRP to be used for energy absorption.

Item Type:Thesis (Masters)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:9902
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:27 Mar 2018 11:54
Last Modified:27 Mar 2018 11:54

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