Application Study Of Bonding Connection Technology On The Roof Of A Vehicle

Bonding is a method which can firmly connected with the same kind or different kindsof materials by the adhesion of the bonding agent on the solid surface. Compared tomechanical fastening and welding, Bonding reduced connector edge of the stressconcentration, thus providing a better fatigue performance; bonding also can connectincompatible materials, because the adhesive layer can prevent non-compatible materialswith each other intimate contact, thus preventing galvanic corrosion; bonding also has a highshear strength, better resistance to corrosion and sealing performance.Currently, the worldwide energy and environmental issues have emerged, whichrequires the car to the direction of lightweight. The connection of the auto parts is the keytechnologies in the automobile manufacturing, welding is the most widely used in car bodymanufacturing connection, welding can not meet some requirements of car manufacturers,attributed to the reasons such as cost and technical bottlenecks. Bonding technology is alow-cost, simple equipment, simple process and very practical technology. With thedevelopment of high-strength adhesives, the adhesive joint strength has been able to meet theperformance requirements of the body. Therefore, Bonding technology research is goodvalue.First of all, this paper introduces the study of the adhesive joint, static research ofadhesive bonding applications in the automotive, and bonding study of the collision at homeand abroad. I make a brief introduction to the research methods used in the study andobtained research results.Secondly, Finite element model of the experimental single-lap bonded joints isestablished in the commercial software ABAQUS, simulating the test load loading mode andboundary conditions. The strain curve along the lap joint direction are obtained from theexperimental results, In the simulation results post-processing the corresponding curve is obtained.Then compare the simulation results of finite element simulation and theexperimental results.Then, Finite element model of the bonding type roof of a vehicle is established,including five models of different adhesive layer thickness. Static strength analysis of thefinite element model is conducted, by imposing bending and torsional loads on the model,comparing the influence of relatively sticky Layer thickness to the stress on variouscomponents of the model, choosing the better stress distribution of the bonding models. Next,finite element model of the welded roof of a vehicle is established, using the selectedadhesive layer thickness of previous bonding model in the welding model where needbonding. Finally, static strength analysis of the welding model is conducted, imposing thesame loads of the bonding model simulation, comparing analysis results of the bondingmodel and welding model.Finally, Welding model previously established and the bonding model with better staticstrength in the static strength analysis are used, with the same collision loads applied on theselected bonding model and welding model; Subsequently finite element analysis of twomodels are conducted, by comparing the stress analysis results the model with bettercrashworthiness are got. While by comparing energy absorption curves of the two modelsthe model with better energy absorption capability will be obtained.