Numerical approach for assessment of dynamic strength for riveted joints |
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| Institution: | 1. ONERA-Lille, Solid and Damage Mechanics Department, 5, boulevard Paul Painlevé, 59000 Lille, France;2. Industrial and Human Automatic Control and Mechanical Engineering Laboratory, Mechanical Engineering Research Group (UMR CNRS 8530), University of Valenciennes, Le Mont Houy, B. P. 311, 59304 Valenciennes Cedex, France;1. Institute of Structures and Design, German Aerospace Center (DLR), Germany;2. Institute of Aircraft Design, University of Stuttgart, Germany;1. College of Mechanical Engineering, Yangzhou University, Yangzhou, 225127, China;2. College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou, 310018, China;1. CEA/CESTA, CS60001, 15 av. des Sablières, 33116 Le Barp, France;2. Laboratoire de Tribologie et Dynamique des Systèmes UMR-CNRS 5513, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France;3. Institut Universitaire de France, 75005 Paris, France |
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| Abstract: | Numerous rivets have to be modelled for aeronautical framework crashes. A numerical procedure based on FE modelling and characterisation of material failure constitutive models is proposed in order to limit the experimental procedure. Quasi-static and dynamic experiments are carried out on elementary tension (punched) and shear (riveted) specimens. No strain rate sensitivity has been measured on the riveted joint assemblies failure. The experiments are used to identify, by an inverse method, the Gurson damage parameters of each material (2024-T351 and 7050 aluminium alloys for the sheet metal plate and the rivet). The characterisation gives rise to a satisfactory correlation between FE models and experiments. Optimised parameters are validated for each material by means of a uniaxial tension test for the sheet metal plate and an ARCAN type specimen in pure tension for the rivet. Results can then be used to identify macroscopic failure criterion to model the rivet behaviour in aeronautical framework crashes. FE tools can also resolve problems linked to limit-design or the design of new riveted joint assemblies more rapidly and cost effectively than experiments. |
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