Reference : Experimental Assessment of the Influence of Interface Geometries on Structural Dynami...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Mechanical engineering
Engineering, computing & technology : Aerospace & aeronautics engineering
http://hdl.handle.net/2268/207242
Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response
English
Dossogne, Tilàn mailto [Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Jerome, Trevor [The Pennsylvania State University > Graduate Program in Acoustics > > >]
Lancereau, Damien [Cranfield University > > > >]
Smith, Scott Alan [University of Maryland at Baltimore - UMB > > > >]
Brake, Matthew [Rice University > Department of Mechanical Engineering > > >]
Pacini, Ben [Sandia National Laboratories > > > >]
Reuss, Pascal [Daimler > > > >]
Schwingshackl, Christoph [Imperial College London > Mechanical Engineering > Dynamics Group > >]
Jan-2017
Proceedings of the International Modal Analysis Conference (IMAC) XXXV
No
International Modal Analysis Conference (IMAC) XXXV
du 30 janvier au 2 février 2017
Society for Experimental Mechanics (SEM)
Garden Grove
CA
[en] bolted joints ; nonlinear vibrations ; hertzian contact ; repeatability tests ; lap joint ; pressure cones ; micro-slip
[en] Jointed interfaces are sources of the greatest amount of uncertainty in the dynamics of a structural assembly. In practice, jointed connections introduce nonlinearity into a system, which is often manifested as a softening response in frequency response, exhibiting amplitude dependent damping and stiffness. Additionally, standard joints are highly susceptible to unrepeatability and variability that make meaningful prediction of the performance of a system prohibitively difficult. This high degree of uncertainty in joint structure predictions is partly due to the physical design of the interface. This paper experimentally assesses the influence of the interface geometry on both the nonlinear and uncertain aspects of jointed connections. The considered structure is the Brake-Reuß beam, which possesses a lap joint with three bolted connections, and can exhibit several different interface configurations. Five configurations with different contact areas are tested, identified, and compared, namely joints with complete contact in the interface, contact only under the pressure cones, contact under an area twice that of the pressure cones, contact only away from the pressure cones and Hertzian contact. The contact only under the pressure cone and Hertzian contact are found to behave linearly in the range of excitation used in this work. The contact area twice that of the pressure cone behaves between the complete contact and contact only under the pressure cone cases.
Sandia National Laboratories
Nonlinear Mechanics and Dynamics Research Institute
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/207242
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energys National Nuclear Security Administration under contract DE-AC04-94AL85000.

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