![]() Nowadays, it is common practice to prepare, to investigate and to qualify cross sections of joints by means of optical microscopy (Ref 4). SPR joints are water- and gas-proof, and they reveal high static strength and good fatigue performance. After piercing the upper blank(s), the rivet creates an interlock with the bottom blank without penetrating it. In the SPR process, a semi-tubular rivet is pushed into a stack of blanks without needing a predrilled hole. Thus, mechanical joining processes such as self-piercing riveting (SPR) may solve these problems. (Ref 3) explained that thermal joining of lightweight materials is often difficult or even impossible, because of the different physical and chemical properties of the materials to be joined. However, the application of dissimilar materials causes various challenges. Since size and design of new vehicles are mostly predefined by the original equipment manufacturer (OEM), lightweight materials such as advanced- and ultra-high-strength steels (AHSS, UHSS), high-strength aluminum alloys (5xxx, 6xxx, 7xxx) and fiber-reinforced plastics (CFRP, GFRP) are applied increasingly to build the so-called body-in-white (Ref 2). Thus, lightweight design is one key enabler to fulfill today’s environmental requirements. (Ref 1), three approaches of lightweight design can be distinguished: (1) reducing the size of vehicles, (2) optimizing the design of vehicles and (3) using lightweight materials. Therefore, the presented simulation is a powerful tool for predicting the behavior of SPR joints under different load cases.Īccording to Papadimitriou et al. ![]() Comparing the failure modes and the force–displacement curves revealed good agreement of simulations and experiments. The numerically determined load capacity was validated with experimental data. The experimental setup of destructive testing was modeled using the FE software Simufact Forming 15. The results of axisymmetric two-dimensional finite element simulations (Hönsch et al in J Phys Conf Ser 1063:1-6, 2018) are the basis for three-dimensional simulations of the destructive testing procedure. In this study, the load capacity of three SPR joints was investigated numerically and experimentally using so-called KS2 samples. The growing number of materials used for the body-in-white requires a reliable and time efficient routine for predicting the joining behavior and the load capacity of SPR joints. Thus, numerous tests must be carried out in order to determine the maximum load capacity of SPR joints for different load angles. For qualifying SPR joints, cross sections must be investigated with respect to predefined quality features. Self-piercing riveting (SPR) is a mechanical joining process which is applied for joining similar and dissimilar lightweight materials in modern car body manufacturing. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |