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New approach of dynamic vibration absorber made from natural fibres composite

Khalid , Amir and Zaman, Izzuddin and Mohd Tobi, Abd Latif and Manshoor, Bukhari (2016) New approach of dynamic vibration absorber made from natural fibres composite. ARPN Journal of Engineering and Applied Sciences, 11 (4). pp. 1-6. ISSN 1819-6608

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With the current trend use of lighter structure and more power-intensive engines in automotive and aircraft manufacturing, vibrations are expected to increase due to its adverse effects on the vibratory behaviour. This could turn out to be a critical problem if the vibration not being controlled through a proper approach. Due to that reason, this paper aims to develop a small-scale and weightless vibration absorber made from natural fibres based polymer epoxy composites. Two types of natural fibres were selected for reinforcement; sugarcane bagasse fibres and kenaf fibres at different fractions 5–20 wt%. In prior to vibration study, the tensile mechanical test was performed in order to determine the optimum fraction of the composites, as well as making comparisons of both composites reinforced by sugarcane bagasse fibres and kenaf fibres. It was found that the 20 wt% of sugarcane bagasse fibres composite achieves the highest Young's Modulus and tensile strength of 0.97 GPa and 21 MPa, respectively compared to epoxy reinforced kenaf fibres. Subsequently, the transmissibility test was carried out to determine the vibration absorption energy by using VCS software. Again, the result indicated that 20 wt% sugarcane bagasse/epoxy composite accomplishes the highest resonance frequencies at 22.9 Hz for 1 mm and 20.6 Hz for 1.5 mm. For the damping properties, it was found that sugarcane bagasse composites increase the damping ratio up to 8%. In the final stage of study, the small-scale vibration absorber was fabricated by using the optimum fraction of composite which determined from both previous testing. The vibration test was performed on a fixed-fixed ends beam and the results showed the resonance amplitude of the beam decreased significantly when it attached with vibration absorber. It concludes that adding more vibration absorbers attached on the beam produce better result in vibration reduction.

Item Type: Article
Uncontrolled Keywords: sugarcane bagasse; kenaf; vibration absorber; mechanical properties; transmissibility
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ255-265 Heat engines
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Energy and Thermofluid Engineering
Depositing User: Dr. Amir Khalid
Date Deposited: 08 Jun 2016 07:14
Last Modified: 08 Jun 2016 07:14
URI: http://eprints.uthm.edu.my/id/eprint/8075
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