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<p>This research investigates the mechanical, thermal, wear, fatigue, and creep behavior of epoxy biocomposites reinforced with <i>Cissus quadrangularis</i> fiber and cellulose particles extracted from dragon fruit peel. Despite the growing interest in natural fiber composites, limited studies explore the combined reinforcement of these bio-sourced materials in epoxy matrices. The biocomposites are fabricated using stir casting, with Araldite LY556 epoxy and triethylenetetramine as the curing agent. Results show that the optimal composition (3 vol.% cellulose filler) achieves a tensile strength of 160.5&#xa0;MPa, flexural strength of 209&#xa0;MPa, and superior fatigue life (24,711 cycles at 25% UTS). Increasing the filler content to 5 vol.% enhances wear resistance (0.012 mm<sup>3</sup>/Nm), lowers the coefficient of friction (0.26), improves thermal conductivity (0.45&#xa0;W/mK), and reduces creep strain (0.0084 at 15,000&#xa0;s). SEM analysis confirms improved interfacial adhesion with uniform filler dispersion, while excessive filler leads to stress concentration points. These findings highlight the potential of these biocomposites for load-bearing applications in automotive, aerospace, and structural engineering, offering a sustainable alternative to conventional composites.</p>

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Mechanical, thermal, wear, fatigue, and creep characteristics of epoxy biocomposites reinforced with Cissus Quadrangularis fiber and cellulose particles extracted from dragon fruit peel

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • R. T. Ajaykarthik,
  • K. Kiran,
  • G. Yuvaraj,
  • Ishrat Meera Mirzana

摘要

This research investigates the mechanical, thermal, wear, fatigue, and creep behavior of epoxy biocomposites reinforced with Cissus quadrangularis fiber and cellulose particles extracted from dragon fruit peel. Despite the growing interest in natural fiber composites, limited studies explore the combined reinforcement of these bio-sourced materials in epoxy matrices. The biocomposites are fabricated using stir casting, with Araldite LY556 epoxy and triethylenetetramine as the curing agent. Results show that the optimal composition (3 vol.% cellulose filler) achieves a tensile strength of 160.5 MPa, flexural strength of 209 MPa, and superior fatigue life (24,711 cycles at 25% UTS). Increasing the filler content to 5 vol.% enhances wear resistance (0.012 mm3/Nm), lowers the coefficient of friction (0.26), improves thermal conductivity (0.45 W/mK), and reduces creep strain (0.0084 at 15,000 s). SEM analysis confirms improved interfacial adhesion with uniform filler dispersion, while excessive filler leads to stress concentration points. These findings highlight the potential of these biocomposites for load-bearing applications in automotive, aerospace, and structural engineering, offering a sustainable alternative to conventional composites.