Experimental evaluation of reinforcing the single lap joint in both longitudinal and transverse direction under tensile and bending condition

Abstract The effect of pins and wires as reinforcing elements in the single adhesive joints under tension and bending has been investigated in this study. Four types of joint specimens were made for this reason. Type one specimen, having no reinforcements and type two having 20 metallic wires of 0.2 mm diameter in longitudinal direction. Type three consist of 6 steel pins having 1 mm diameter in transverse direction. In type four, both the pins in transverse and wires in longitudinal direction have been used to reinforce the joint. After manufacturing of the samples, their tensile and bending properties were investigated. The results show that, pins increase bending strength and toughness during both tensile and bending while metallic wires increase tensile strength and modulus of joint. Overall, the sample with combined reinforcements has the highest tensile and bending properties apart from modulus. Since the weight of the reinforcements used are negligible, the specific properties of the joint has been improved significantly. The tensile specific strength and toughness of combined reinforced joint as compared to simple joint with no reinforcement has been improved by 33.48% and 82.52% respectively. Also in that case, the specific bending strength and toughness are improved by 64.4% and 231.91% respectively.