Driven by the CO2-emission law by the European government and the increasing costs for raw materials as well as energy, the automotive industry is increasingly using multi-material constructions. This leads to a continuous increase in the use of mechanical joining techniques and especially the self-piercing riveting is of particular importance. The reason for this is the wide range of joining possibilities as well as the high load-bearing capacities of the joints. To be able to react to changing boundary conditions, like material thickness or strength variation of the sheets, research work is crucial with regard to the increase of versatility. In this paper, a numerical study of the influences on the selfpiercing riveting process is presented. For this purpose, the influence of different process parameters such as rivet length and die depth on various quality-relevant characteristics were investigated. With the help of the design of experiment, significant influences were determined and interactions between the individual parameters are shown.
Due to their excellent mechanical properties, fiber-reinforced plastics are increasingly being used in technical lightweight products. The multi-material design of fiber-reinforced plastic and metal leads to great lightweight constructions because the potential of the materials can be efficiently used for the specific field of application. This restricts conventional thermal joining technologies and shows the demand for cost-effective and efficient mechanical and adhesive joining technologies. This paper depicts the development of a new type of auxiliary joining element with integrated pin structures whose purpose is to increase the load-bearing capacity of mechanically joined fiber-reinforced plastic/metal combinations. In addition, the hole area of the fiber-reinforced plastic can be relieved in this way by transferring the operating loads into the laminate via the pin structures. In addition to experimental studies of the application methodology, the quasi-static and dynamic load-bearing capacity will be investigated. This paper presents detailed information about the development of the new auxiliary joining element and the characteristics of the joints, including corrosion effects generated by a corrosion camber.
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