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<p>Fibre-reinforced polymer composites (FRPCs) are widely used in structural and semi-structural applications across various engineering fields. While previous drilling research on FRPCs has largely focused on optimising processing conditions to enhance hole quality, limited attention has been given to the interplay between drilling parameters, material properties, and production methods. This study investigates high-speed drilling of silane-treated pineapple fibre and waste micro rubber-reinforced vinyl ester composites under thermal (50&#xa0;°C for 7, 14, and 30 days) and water ageing (room temperature for 7, 14, and 30 days) conditions. Post-drilling analysis examined common defects such as fibre delamination, matrix cracking, degradation, fibre swelling, burning, and edge tearing using an optical microscope. Results show that silane surface treatment with 3-aminopropyltrimethoxysilane significantly reduced drilling-induced damage under temperature ageing conditions, demonstrating its effectiveness in improving composite durability and machinability. These highly stable treated composites could be used in automotive, aerospace, and structural applications where large drill holes and fasteners are needed to be fixed to join the structural member temporarily and permanently.</p>

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Impact of water and temperature ageing on silane surface-treated pineapple fibre-waste micro rubber vinyl ester composite

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Seeniappan Kaliappan,
  • T. Mothilal,
  • M. Ramya,
  • S. Saravanakumar,
  • Arul Kulandaivel,
  • Vinayagam Mohanavel,
  • Manickam Ravichandran,
  • Manzoore Elahi M. Soudagar

摘要

Fibre-reinforced polymer composites (FRPCs) are widely used in structural and semi-structural applications across various engineering fields. While previous drilling research on FRPCs has largely focused on optimising processing conditions to enhance hole quality, limited attention has been given to the interplay between drilling parameters, material properties, and production methods. This study investigates high-speed drilling of silane-treated pineapple fibre and waste micro rubber-reinforced vinyl ester composites under thermal (50 °C for 7, 14, and 30 days) and water ageing (room temperature for 7, 14, and 30 days) conditions. Post-drilling analysis examined common defects such as fibre delamination, matrix cracking, degradation, fibre swelling, burning, and edge tearing using an optical microscope. Results show that silane surface treatment with 3-aminopropyltrimethoxysilane significantly reduced drilling-induced damage under temperature ageing conditions, demonstrating its effectiveness in improving composite durability and machinability. These highly stable treated composites could be used in automotive, aerospace, and structural applications where large drill holes and fasteners are needed to be fixed to join the structural member temporarily and permanently.