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Impact strength of woven kenaf fibre reinforced polyester composite plates

Khalid, Siti Nor Azila (2017) Impact strength of woven kenaf fibre reinforced polyester composite plates. PhD thesis, Universiti Tun Hussein Onn Malaysia.


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Natural fibre composition is a brilliant option for the most widely applied fibre in the composite innovation such as covers; car doors panel and car roofs. The advantages of natural fibre composites are renewable, low cost, low density and tend to decompose (biodegradability). In the recent years, there have been many researchers involved in the field of natural fibre reinforced plastic. Most of them studied based on composite reinforced with short and non-woven fibres related to issues such as poor fire resistance, variable quality and lower strength properties. This study focused on the composite woven structure from the woven kenaf fibre based on their higher capability to absorb energy. This method using Taguchi for optimization which can reduce the time consumed rather than using experimental approach. Composites were prepared using the hand lay-up method with three different weaving patterns, namely plain, twill, and basket. The hardened composites were cured for 24 hours before it was shaped according to specific dimensions ASTM D3763 and D3039 for impact and tensile tests. The highest energy absorption for plain, twill, and basket were 30.412, 36.026 and 32.509 Joule respectively. The effect of weave patterns and orientations was significant on energy absorption performance. Although, from three woven weaving patterns the twill types showed an improvement on impact strength of energy absorption compared to the plain and basket woven in all orientations among the others composites. After optimization, the value of energy absorption with percentage ratio of plain, twill and basket woven was 27.681 (9.86%), 32.770 (8.26%) and 29.893 (8.75%) Joule respectively. The result was still under acceptable range since it was below 10% deviate value from actual result which was due to material yarn size under control and sensitivity to dynamic loading. Result on tensile test shows the highest mechanical behaviour after using new orientation which is increasing 3.77%. It indicated that, the natural fibre was very sensitive with impact loading.

Item Type: Thesis (PhD)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 24 Jun 2018 01:32
Last Modified: 24 Jun 2018 01:32
URI: http://eprints.uthm.edu.my/id/eprint/10189
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