Investigating the mechanical strength of adhesive joints at different concentration of nanoparticles

Abstract

The mechanical properties of a single lap bonds that had been formed by integrating two dissimilar materials, aluminium plate of Al 6061 and steel plate of SAE 1055 grades using the Bisphenol-A grade epoxy resin (along with the HY 5200 hardener) were investigated, whereas the shearing stress state had been maintained. In addition, the impact that incorporating nano-silica into the epoxy in different quantities on the mechanical properties of the joints had been investigated. During the shearing stress condition, the overlapping distance was decided as being 2.5 cm, and the fractions of nano-silica were chosen to be 0.25, 0.5 and 1.0 percentages in epoxy, correspondingly. When the results of the experiments have been reviewed, it was discovered that the deployment of nano-silica in Bisphenol-A resulted in a considerable increase in the overall average destructive load connected with the process. As a result of the tests, it had been found that the concentration of nano-silica particles, which was found to be the most beneficial for increasing the mechanical characteristics strength of adhesion bonds identified was 0.5%, and the augmentation in frequency of failure stress rise had been recorded as 52.16%. Furthermore, it was demonstrated that the straining of the nano-sized particles had a significant effect in determining the shearing properties of the adhesion connections. Moreover, it was being demonstrated that the elongation of the interface may be improved by introducing nano-silica particles within the bond. When the gluing interactions of the samples were being evaluated, it was found that there was deterioration in the form of adhesion decoupling. On the other hand, nano-silica restocking had been found to be a mix of adhesion and cohesion qualities.