Créé le : 13/09/2010 - Mis à jour le : 23/10/2012
J.-L. Chenot, Nanjiang Chen, Min Wan, Julien Malrieu, Maxime Thonnerieux, R. Ducloux - Revue Métal Forming…
The riveting process is a very important mechanical fastening process for a wide range of applications for aerospace, car industry, etc. To-day the use of rivets is mainly based on experience and some industrial laboratory tests. More recently a need for a more accurate and faster approach has emerged in order to evaluate the process of riveting and the strength of the assembly. The purpose of this paper is to illustrate some preliminary results which were obtained during the MonaLisa project. A computer code must take into account the rivet, two or more metal sheets, the riveting tools and their interactions. A three-dimensional finite element approach is considered in order to be able to treat non axisymmetric deformation, e. g. shearing of the assembly or riveting with different axes for the rivet and the sheets. The space discretization for our velocity-pressure formulation is performed using P1+P1 tetrahedral elements. The riveting process was simulated for different rivet sizes and compared with experimental data. Different levels of material description were introduced including a map of initial hardness in the rivet and a simple damage law. The strength of the assembly was tested using a tension test.
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