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An Investigation to Enhance the Flexural Modulus of the Natural Fibre Composite Using Hemp Fibre Polymer Matrix

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Abstract:

Natural fibre composites are gaining importance in engineering and automotive sectors due to their sustainability, lightweight nature, and cost-effectiveness. However, their flexural modulus and other mechanical properties require enhancement to meet industrial standards. This study aims to improve the performance of hybrid composites reinforced with hemp, jute, and coir fibres in an epoxy matrix. Specimens were fabricated using the hand lay-up technique followed by compression moulding and tested according to ASTM standards. Mechanical characterization included hardness, tensile, flexural, compressive, and impact tests, along with water absorption analysis. The results demonstrated significant improvements, with maximum hardness of 80 HRM, tensile strength of 16.95 N/mm², compressive strength of 5.268 N/mm², flexural strength of 95.96 N/mm², and impact resistance of 0.20 J. Water absorption varied between 11.6% and 25%, depending on resin-to-fibre ratios. One-way ANOVA confirmed statistically significant differences among formulations (p = 0.005), validating the effect of fibre–resin composition. The optimal formulation (75% epoxy with balanced fibre reinforcement) achieved superior mechanical performance, establishing hybrid natural fibre composites as a promising eco-friendly alternative to conventional materials.

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Periodical:

Materials Science Forum (Volume 1172)

Pages:

19-33

DOI:

https://doi.org/10.4028/p-thZ0r0

Citation:

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Online since:

December 2025

Authors:

S. Rahul*, A. Mohanraj, M. Nizhar Ahamadhu, A. Mohamad Arafath, S. L. Mohanesh, S. Saran

Keywords:

Composite Material, Compression Moulding, Epoxy Resin, Flexural Strength, Hemp Fibre, Jute Fibre, Natural Fibre Composite, Tensile Strength

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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