عنوان مقاله [English]
In this research, the design, fabrication and testing of a single L-shaped adhesive joint between a composite sheet and an aluminum piece under tensile loading has been performed experimentally. To make an experimental sample, nanographene with different weight percentages was used to strengthen the composite and also structural adhesive (homogeneous with the composite phase phase resin) was used to improve the mechanical properties of the joint. The effect of changing the base length of the L-shaped aluminum part on the bond strength has also been investigated. 12 bonding modes with a combination of weight percentages of 0.1 and 0.3 for multilayer and weight percentages of 0.1, 0.3 and 0.5 for adhesive with 5 repetitions in each test, a total of 60 The sample is made and examined. By comparing and examining the results of the tensile test of samples and photographs taken by scanning electron microscopy (SEM) of the separation of multilayer and L-shaped piece at the separation site, it was found that the connection with a combination of zero weight percentage for multilayer and weight percentage of 3 / 0 for adhesive has shown the maximum tensile strength. This means that the addition of nanographene to the multilayer reduces the tensile strength and the addition to the epoxy resin as an adhesive improves the tensile strength of the joint. Finally, the effect of increasing the length of the overlap area of the two adhesive pieces was investigated. The result of the combination of the optimal percentage of nanographene in the multilayer and the adhesive showed that a 25% increase in the length of the overlap area would increase by 148% and a 50% increase in the length of this area would result in a 200% increase in the vertical tensile force borne by the joint.