@article{article_1801354, title={Effect of Tungsten-Cobalt (WCo) nanoparticles on shear and flexural strength of adhesive joints}, journal={Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi}, volume={31}, pages={758–764}, year={2025}, author={Aslan, Mikail and Çakır, Mehmet Veysel and Almossa, Ahmed}, keywords={WCo nanoparçacıkları, Epoksi yapıştırıcı, Tek katmanlı eklemler (SLJ, Kayma dayanımı, Eğilme performansı}, abstract={The effects of Tungsten Cobalt (WCo) nanoparticle contribution on the shear and bending strengths are examined in adhesively bonded single-lap joints made with glass fiber-reinforced polymer (GFRP) substrates in this study. WCo particles were synthesized via mechanical alloying and added to epoxy adhesives at varying concentrations (1.0, 3.0, and 5.0 wt.%). The adhesive mixtures were used to bond GFRP plates in single-lap joints (SLJ), and their mechanical performance was evaluated under shear and bending loading conditions. The shear strength results indicate that the incorporation of 1.0 wt.% WCo increased shear strength by 68.5%, while 3.0 wt.% WCo yielded the highest improvement at 136%. However, the addition of 5.0% WCo led to a reduced enhancement (60%) due to nanoparticle agglomeration and local stress concentrations. Notably, the maximum bending stress was observed in the 3% WCo-containing specimens. Specifically, the bending load increased by 51.5%, from 61.96 MPa in the pure epoxy specimen to 93.85 MPa in the 3% WCo-reinforced specimen. Failure surface analysis revealed that WCo-reinforced samples exhibited light-fiber tear, thin-layer cohesive failures, and enhanced bonding properties due to increased viscosity and the filling of micro-voids. These findings suggest that WCo nanoparticles effectively improve the shear and bending performance of epoxy adhesives by enhancing interfacial bonding, ductility, and stress distribution mechanisms. The study provides insights into the potential of WCo-reinforced adhesives as a cost-effective and high-performance solution for engineering applications.}, number={5}, publisher={Pamukkale Üniversitesi}