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Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response
Dossogne, Tilàn; Jerome, Trevor; Lancereau, Damien et al.
2017In Proceedings of the International Modal Analysis Conference (IMAC) XXXV
 

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Keywords :
bolted joints; nonlinear vibrations; hertzian contact; repeatability tests; lap joint; pressure cones; micro-slip
Abstract :
[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.
Disciplines :
Aerospace & aeronautics engineering
Mechanical engineering
Author, co-author :
Dossogne, Tilàn ;  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
Language :
English
Title :
Experimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response
Publication date :
January 2017
Event name :
International Modal Analysis Conference (IMAC) XXXV
Event organizer :
Society for Experimental Mechanics (SEM)
Event place :
Garden Grove, United States - California
Event date :
du 30 janvier au 2 février 2017
Main work title :
Proceedings of the International Modal Analysis Conference (IMAC) XXXV
Name of the research project :
Nonlinear Mechanics and Dynamics Research Institute
Funders :
SNL - Sandia National Laboratories [US-NM]
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since 10 February 2017

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