Mechanical properties of laminated composites reinforced by natural fibers of ‎cotton, wool and kenaf under tensile, flexural and shear loadings

Moradi, Elham; Zeinedini, Afshin; Heidari-shahmaleki, Ehsan

doi:10.22068/jstc.2018.89462.1456

Document Type : Research Paper

Authors

Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

10.22068/jstc.2018.89462.1456

Abstract

The increasing need for manufacturing of eco-friendly products has led researchers to explore the possibility of using of natural fibers in ‎the fabricating of composites. In the current study, plain-woven plant fibers of cotton and kenaf, and animal fiber of wool with were used ‎as the reinforcement of epoxy-based laminated composites. Moreover, in order to evaluate the mechanical properties of the natural fibers ‎reinforced laminated composites, plain-woven E-glass/epoxy composites were also manufactured. The mechanical properties of the ‎samples subjected to tensile, shear and flexural loadings were determined. The results showed that the fraction of the specific tensile ‎strength of the cotton/epoxy laminates to laminates reinforced by kenaf or wool fiber is equal to 1.71 and 4.47, respectively. Under shear ‎loading, the specific strength of the samples was also 1.24 and 2.45 times greater by changing the kenaf and wool fibers to cotton fiber, ‎respectively. In addition, the specific flexural strength of the cotton/epoxy composites was respectively obtained 1.42 and 2.34 times ‎greater than that of the kenaf/epoxy and wool/epoxy composites. Moreover, the specific energy absorption related to the cotton/epoxy ‎laminated composites under tensile loading is 2.7 times greater than that of the glass fiber reinforced laminated composites. At the end, in ‎order to measure the amount of water absorbed by different samples, moisture absorption test was also carried out at intervals of 3 and ‎‎10 days. It was revealed that the greatest percent of the water absorption (7.47%) is related to the cotton reinforced specimen at interval of ‎‎10 days‎.

Keywords

Main Subjects

Polymer matrix composites

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Mechanical properties of laminated composites reinforced by natural fibers of ‎cotton, wool and kenaf under tensile, flexural and shear loadings

References

Volume 6, Issue 1June 2019Pages 99-108

Volume 6, Issue 1
June 2019
Pages 99-108