Flexural behaviour of uni-directional kenaf composites using experimental and simulation methods

Research output: Contribution to journalArticle

Abstract

The use of natural fibres as reinforcement materials in composites has increased significantly due to the various advantages they offer. This paper focuses on the flexural characteristics of kenaf/polyester composites that have a uni-directional fibre orientation. The scope of this research is based on the use of kenaf fibres as reinforcement materials. The reason for the selection of kenaf fibres is because they are biodegradable and allow for the ease of availability as kenaf is cultivated locally. The specimens used in the test are in the cylindrical shape with 200 mm length and 10 mm diameter. The composite specimens are prepared using a pultrusion method with uni-directional long kenaf fibres as reinforcement and polyester resin as the matrix. The specimens are tested using ASTM D790-71 standard at four different temperatures of 27°C, 60°C, 100°C and 160°C. 2 different cross-head speed used, 2mm/min and 10mm/min each. Parameters measured in these studies are stress vs. strain, displacement vs. time and displacement vs. temperature. The research findings show that the failure patterns and deformations when compared between numerical analysis and experimental works are practically the same but with minor discrepancies in the values obtained due to different surroundings. The results also reveal that the percentage between the fibres and matrixes plays a vital role in the quality. As the ratio of fibres increases, the ultimate tensile strength of the composites also escalates together with its brittleness. The failure mode and deformation observed from the experimental data have shown that kenaf/polyester composites have good energy absorption capability at room temperature of 27°C, where the strength decreases as the temperature rises.

Original languageEnglish
Pages (from-to)57-64
Number of pages8
JournalInternational Journal of Mechanical and Mechatronics Engineering
Volume16
Issue number4
Publication statusPublished - 2016

Fingerprint

Kenaf fibers
Composite materials
Reinforcement
Polyesters
Pultrusion
Temperature
Polyester resins
Natural fibers
Fibers
Energy absorption
Brittleness
Fiber reinforced materials
Failure modes
Numerical analysis
Tensile strength
Availability

Keywords

  • Kenaf fibres
  • Mechanical properties
  • Polymer matrix composites
  • Pultrusion process
  • Uni-directional orientation

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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title = "Flexural behaviour of uni-directional kenaf composites using experimental and simulation methods",
abstract = "The use of natural fibres as reinforcement materials in composites has increased significantly due to the various advantages they offer. This paper focuses on the flexural characteristics of kenaf/polyester composites that have a uni-directional fibre orientation. The scope of this research is based on the use of kenaf fibres as reinforcement materials. The reason for the selection of kenaf fibres is because they are biodegradable and allow for the ease of availability as kenaf is cultivated locally. The specimens used in the test are in the cylindrical shape with 200 mm length and 10 mm diameter. The composite specimens are prepared using a pultrusion method with uni-directional long kenaf fibres as reinforcement and polyester resin as the matrix. The specimens are tested using ASTM D790-71 standard at four different temperatures of 27°C, 60°C, 100°C and 160°C. 2 different cross-head speed used, 2mm/min and 10mm/min each. Parameters measured in these studies are stress vs. strain, displacement vs. time and displacement vs. temperature. The research findings show that the failure patterns and deformations when compared between numerical analysis and experimental works are practically the same but with minor discrepancies in the values obtained due to different surroundings. The results also reveal that the percentage between the fibres and matrixes plays a vital role in the quality. As the ratio of fibres increases, the ultimate tensile strength of the composites also escalates together with its brittleness. The failure mode and deformation observed from the experimental data have shown that kenaf/polyester composites have good energy absorption capability at room temperature of 27°C, where the strength decreases as the temperature rises.",
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author = "Yassin, {B. M.} and Rozli Zulkifli and {Wan Daud}, {Wan Ramli} and Shahrum Abdullah",
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N2 - The use of natural fibres as reinforcement materials in composites has increased significantly due to the various advantages they offer. This paper focuses on the flexural characteristics of kenaf/polyester composites that have a uni-directional fibre orientation. The scope of this research is based on the use of kenaf fibres as reinforcement materials. The reason for the selection of kenaf fibres is because they are biodegradable and allow for the ease of availability as kenaf is cultivated locally. The specimens used in the test are in the cylindrical shape with 200 mm length and 10 mm diameter. The composite specimens are prepared using a pultrusion method with uni-directional long kenaf fibres as reinforcement and polyester resin as the matrix. The specimens are tested using ASTM D790-71 standard at four different temperatures of 27°C, 60°C, 100°C and 160°C. 2 different cross-head speed used, 2mm/min and 10mm/min each. Parameters measured in these studies are stress vs. strain, displacement vs. time and displacement vs. temperature. The research findings show that the failure patterns and deformations when compared between numerical analysis and experimental works are practically the same but with minor discrepancies in the values obtained due to different surroundings. The results also reveal that the percentage between the fibres and matrixes plays a vital role in the quality. As the ratio of fibres increases, the ultimate tensile strength of the composites also escalates together with its brittleness. The failure mode and deformation observed from the experimental data have shown that kenaf/polyester composites have good energy absorption capability at room temperature of 27°C, where the strength decreases as the temperature rises.

AB - The use of natural fibres as reinforcement materials in composites has increased significantly due to the various advantages they offer. This paper focuses on the flexural characteristics of kenaf/polyester composites that have a uni-directional fibre orientation. The scope of this research is based on the use of kenaf fibres as reinforcement materials. The reason for the selection of kenaf fibres is because they are biodegradable and allow for the ease of availability as kenaf is cultivated locally. The specimens used in the test are in the cylindrical shape with 200 mm length and 10 mm diameter. The composite specimens are prepared using a pultrusion method with uni-directional long kenaf fibres as reinforcement and polyester resin as the matrix. The specimens are tested using ASTM D790-71 standard at four different temperatures of 27°C, 60°C, 100°C and 160°C. 2 different cross-head speed used, 2mm/min and 10mm/min each. Parameters measured in these studies are stress vs. strain, displacement vs. time and displacement vs. temperature. The research findings show that the failure patterns and deformations when compared between numerical analysis and experimental works are practically the same but with minor discrepancies in the values obtained due to different surroundings. The results also reveal that the percentage between the fibres and matrixes plays a vital role in the quality. As the ratio of fibres increases, the ultimate tensile strength of the composites also escalates together with its brittleness. The failure mode and deformation observed from the experimental data have shown that kenaf/polyester composites have good energy absorption capability at room temperature of 27°C, where the strength decreases as the temperature rises.

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