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<p>Drilled holes are critical in composite assemblies, where hole quality directly influences structural integrity and joint reliability. This work presents an extensive evaluation of the cellulosic structural features of date palm fibers alongside the drilling behavior of jute/palm fiber-reinforced hybrid composites, a material engineered for lightweight automotive and industrial applications. The hybrid composite reinforcement combines jute fibers for strength with date palm fibers for their high cellulose content (64.34%), exceptional crystallinity (72.36%), low density, and dimensional stability. Employing TOPSIS multi-objective optimization methodology to balance surface quality against productivity, systematic experiments were conducted with HSS, HSS-Co5, and carbide drills across various parameters. The optimal condition was identified as an HSS drill operating at 1194 rev/min and 0.04&#xa0;mm/rev, which yielded a superior surface finish (Ra = 5.33&#xa0;μm, Rq = 6.66&#xa0;μm), an acceptable material removal rate (2400.68&#xa0;mm³/min), and the highest TOPSIS closeness coefficient (0.7884). Pareto front analysis further delineated three optimization scenarios: maximum surface quality, balanced performance, and high productivity. A key finding was the negligible tool wear observed across all trials, a result attributed to the non-abrasive nature of the cellulosic fibers, which significantly enhances the composite’s sustainable machining potential. Microscopic examination of the drilled surfaces revealed textural differences directly influenced by the distinct cellulose architectures of the jute and palm fibers, highlighting their unique roles in determining damage mechanisms and local surface integrity. The results confirm the viability of this high-cellulose composite for industrial applications requiring precision machining and environmental sustainability.</p>

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Drilling optimization in lightweight hybrid composites: integrating material characterization with multi-objective decision-making

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Mohamed Slamani,
  • Abdelmalek Elhadi,
  • Salah Amroune,
  • Mustapha Arslane,
  • Walid Jomaa,
  • Ramadan Youssef Sakr,
  • Borhen Louhichi,
  • Mohamad A. Alawad

摘要

Drilled holes are critical in composite assemblies, where hole quality directly influences structural integrity and joint reliability. This work presents an extensive evaluation of the cellulosic structural features of date palm fibers alongside the drilling behavior of jute/palm fiber-reinforced hybrid composites, a material engineered for lightweight automotive and industrial applications. The hybrid composite reinforcement combines jute fibers for strength with date palm fibers for their high cellulose content (64.34%), exceptional crystallinity (72.36%), low density, and dimensional stability. Employing TOPSIS multi-objective optimization methodology to balance surface quality against productivity, systematic experiments were conducted with HSS, HSS-Co5, and carbide drills across various parameters. The optimal condition was identified as an HSS drill operating at 1194 rev/min and 0.04 mm/rev, which yielded a superior surface finish (Ra = 5.33 μm, Rq = 6.66 μm), an acceptable material removal rate (2400.68 mm³/min), and the highest TOPSIS closeness coefficient (0.7884). Pareto front analysis further delineated three optimization scenarios: maximum surface quality, balanced performance, and high productivity. A key finding was the negligible tool wear observed across all trials, a result attributed to the non-abrasive nature of the cellulosic fibers, which significantly enhances the composite’s sustainable machining potential. Microscopic examination of the drilled surfaces revealed textural differences directly influenced by the distinct cellulose architectures of the jute and palm fibers, highlighting their unique roles in determining damage mechanisms and local surface integrity. The results confirm the viability of this high-cellulose composite for industrial applications requiring precision machining and environmental sustainability.