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<p>The present work investigates the static and dynamic behavior of sandwiched silane treated aluminum-coated glass fabric and surface treated puya mirabilis fiber reinforced polyester composites with the incorporation of granite dust as a particulate filler. Composite laminates were fabricated with varying filler loadings (1, 3, and 5 vol%), and their fatigue, creep, thermal conductivity, and water absorption properties were systematically evaluated. The results demonstrated that fiber hybridization significantly improved the fatigue life compared to the neat resin, while the introduction of granite dust further enhanced performance. Among the studied compositions, specimen RPG2 containing 3 vol% granite dust exhibited the highest fatigue resistance, sustaining 24,711, 21,711, and 18,741 cycles at 25%, 50%, and 75% of UTS, respectively. This optimum behavior is attributed to uniform filler dispersion, which improved interfacial bonding, delayed crack initiation, and enabled efficient stress transfer between the matrix and the treated fibers. Conversely, specimen RPG3 with 5 vol% granite dust outperformed all others in creep, thermal, and water absorption tests. RPG3 showed the lowest creep strain values of 0.0059, 0.0068, and 0.0084 at 5000, 10,000, and 15,000&#xa0;s, owing to restricted polymer chain mobility and a denser fiber–matrix–filler network. It also recorded the highest thermal conductivity of 0.48&#xa0;W/mK, facilitated by continuous filler-based conduction channels, and the lowest water absorption of 1.42%, resulting from the combined effect of surface treatments and tightly packed granite dust minimizing porosity. These findings confirm that while RPG2 is best suited for fatigue-critical applications, RPG3 is more effective for long-term dimensional stability, thermal management, and moisture resistance.</p>

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Performance evaluation of silane-treated sandwich-structured AL2O3 coated glass fabric and puya mirabilis fiber reinforced polyester composites

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Seeniappan Kaliappan,
  • L. Natrayan,
  • M. Muthukannan,
  • A. George Fernandez Raj,
  • Ramya Maranan,
  • Vinayagam Mohanavel,
  • Manzoore Elahi M. Soudagar,
  • V. P. Arthanarieswaran

摘要

The present work investigates the static and dynamic behavior of sandwiched silane treated aluminum-coated glass fabric and surface treated puya mirabilis fiber reinforced polyester composites with the incorporation of granite dust as a particulate filler. Composite laminates were fabricated with varying filler loadings (1, 3, and 5 vol%), and their fatigue, creep, thermal conductivity, and water absorption properties were systematically evaluated. The results demonstrated that fiber hybridization significantly improved the fatigue life compared to the neat resin, while the introduction of granite dust further enhanced performance. Among the studied compositions, specimen RPG2 containing 3 vol% granite dust exhibited the highest fatigue resistance, sustaining 24,711, 21,711, and 18,741 cycles at 25%, 50%, and 75% of UTS, respectively. This optimum behavior is attributed to uniform filler dispersion, which improved interfacial bonding, delayed crack initiation, and enabled efficient stress transfer between the matrix and the treated fibers. Conversely, specimen RPG3 with 5 vol% granite dust outperformed all others in creep, thermal, and water absorption tests. RPG3 showed the lowest creep strain values of 0.0059, 0.0068, and 0.0084 at 5000, 10,000, and 15,000 s, owing to restricted polymer chain mobility and a denser fiber–matrix–filler network. It also recorded the highest thermal conductivity of 0.48 W/mK, facilitated by continuous filler-based conduction channels, and the lowest water absorption of 1.42%, resulting from the combined effect of surface treatments and tightly packed granite dust minimizing porosity. These findings confirm that while RPG2 is best suited for fatigue-critical applications, RPG3 is more effective for long-term dimensional stability, thermal management, and moisture resistance.