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Communication Dans Un Congrès Année : 2013

Dynamics of Assembled Structures: Taking Into Account the Surface Defects in Interfaces

Résumé

In structural dynamics, the prediction of damping remains the biggest challenge. This paper deals with the energy losses caused by micro-slip in a nominally planar interface of a structure. This paper proposes an analytical and experimental study of flexural vibrations of a clamped-clamped beam with innovative position of the interfaces. The objective of this test bench is to characterize the global rheology of the interface. The proposed model aims to characterize this rheology based on local settings of the interface. First, the test bench is described and the choice of the position of the interface is justified. The experimental bench and the dynamic behavior of this structure are presented. We propose to illustrate the mechanism of energy losses by micro-slip by making a comparison between the behavior of a “monolithic” beam and a sectioned beam. Secondly, a modeling of the interface taking into account the surface defect is presented. The energy dissipated by friction in the interface is calculated during a loading cycle. This leads to a computation of the dissipated energy and thus to a nonlinear loss factor. Finally, we confront the loss factor calculated analytically and the measured one.
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Dates et versions

hal-01885957 , version 1 (24-11-2021)

Licence

Paternité - Pas d'utilisation commerciale

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Nicolas Peyret, Gaël Chevallier, Jean-Luc Dion. Dynamics of Assembled Structures: Taking Into Account the Surface Defects in Interfaces. ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Aug 2013, Portland, United States. ⟨10.1115/DETC2013-12092⟩. ⟨hal-01885957⟩
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