Enhancing the shear performance of single lap adhesive joints by drilled hole geometry optimization

CEYLAN R., OZUN E., BORA M. Ö., FİDAN S., ÜRGÜN S., YARAR E., ...Daha Fazla

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 2026 (SCI-Expanded, Scopus)

Özet

Adhesive joints with drilled holes, which received considerable attention in the last few years, improve the failure load of adhesive joints by mechanical interlocking, offering great promise for the future to overcome the limitations of conventional non-drilled adhesive joints. In the first stage of this research, the influence of different hole configurations on the shear strength of PMMA/PMMA single-lap adhesive joints was examined. Moreover, the geometrical parameters of the drilled holes were measured by an optical microscope and profilometry analysis. The experimental results showed that the performance of all adhesive joints with drilled holes was improved significantly relative to non-drilled adhesive joints. Of these, Configuration 4 produced the maximum load of 1308.42 N, reflecting an improvement of 271.62%. In addition, FEM analysis was carried out, showing excellent agreement with the experimental results. In the second stage, Analysis of Variance (ANOVA) was used to examine the most effective parameters for the designs. The ANOVA showed that the hole configuration was the most effective parameter for designs. The results obtained in this research clearly show that the geometrical parameters of the holes play essential role in the mechanical performance of adhesive joints, offering an essential basis for future designs to be optimized.