عنوان	Study of the effect of graphene oxide nanoparticle addition on the mechanical behavior of single-lap adhesive joints
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	graphene oxide (GO), single-lap adhesive joint, epoxy adhesive, finite element analysis (FEA), drucker-prager model, mechanical performance, nanoparticles, adhesive thickness, bond length, SEM analysis
چکیده	Adhesive joints are widely used in industries such as aerospace and shipbuilding due to their unique mechanical and structural advantages. This study investigates the mechanical performance enhancement of single-lap adhesive joints (SLAJs) through the incorporation of graphene oxide (GO) nanoparticles into a two-part epoxy adhesive (AD-311). Samples containing 0.1%, 0.3%, and 0.5% GO by weight were prepared, and their tensile and compressive behaviors were evaluated according to ASTM standards. Scanning electron microscopy (SEM) revealed improved fracture surface roughness and energy absorption, particularly at 0.3 wt% GO, which exhibited a 35.65% increase in joint failure load. Finite element analysis (FEA), using the Drucker-Prager plasticity model, demonstrated excellent agreement with experimental results, validating the predictive capability of the simulation. The influence of adhesive thickness and bond length was also numerically assessed using FEA, showing that thinner adhesive layers and longer joints enhance load-bearing capacity. Stress and strain distributions further elucidated the positive role of GO in increasing shear and equivalent stress resistance while reducing plastic strain. These findings confirm that optimizing GO concentration significantly improves joint strength and durability, offering promising implications for structural adhesive applications in engineering.
پژوهشگران	مصطفی ملی زاده (نفر اول)