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<p>Natural fillers are promising, abundant, and inexpensive for adhesively bonded joints, which are now widely used due to their unique advantages, including uniform stress distribution, reduced stress concentration, and enhanced strength. This study investigates the effect of natural particles from various date palm components on the mechanical properties of joints bonded together. The date palm seeds (DPS) and mesh (DPM) were the two sections of the tree from which the particles were taken. Glass fiber-reinforced polymer (GFRP) composite laminates were used as the adherents. The effects of different weight ratios of natural particles were experimentally investigated. For this purpose, single lap joints (SLJs) with three various date palm filler weight rates, 5, 10, and 15&#xa0;wt%, were considered. The experimental findings demonstrate that the inclusion of date palm fillers considerably increased the strength of adhesively bonded joints. Adding 10&#xa0;wt% of DPM particles enhanced the shear strength of adhesive SLJs by 59%. Whereas the shear and flexural strengths increased by 88 and 70%, respectively, with 10&#xa0;wt% of DPS fillers compared with the pure epoxy joint. As stated in the findings, date palm particles can strengthen adhesive joints by enhancing load-bearing capacity and energy absorption.</p>

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Structural and mechanical performance of natural date palm-reinforced epoxy composites for joint applications

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Bashar R. Al‑Ogaidi,
  • Omar A. Abood,
  • Waleed Kadhim Al-Azzawi,
  • Ehssan Al-Bermany,
  • Akhil S. Karun,
  • N. Biju

摘要

Natural fillers are promising, abundant, and inexpensive for adhesively bonded joints, which are now widely used due to their unique advantages, including uniform stress distribution, reduced stress concentration, and enhanced strength. This study investigates the effect of natural particles from various date palm components on the mechanical properties of joints bonded together. The date palm seeds (DPS) and mesh (DPM) were the two sections of the tree from which the particles were taken. Glass fiber-reinforced polymer (GFRP) composite laminates were used as the adherents. The effects of different weight ratios of natural particles were experimentally investigated. For this purpose, single lap joints (SLJs) with three various date palm filler weight rates, 5, 10, and 15 wt%, were considered. The experimental findings demonstrate that the inclusion of date palm fillers considerably increased the strength of adhesively bonded joints. Adding 10 wt% of DPM particles enhanced the shear strength of adhesive SLJs by 59%. Whereas the shear and flexural strengths increased by 88 and 70%, respectively, with 10 wt% of DPS fillers compared with the pure epoxy joint. As stated in the findings, date palm particles can strengthen adhesive joints by enhancing load-bearing capacity and energy absorption.