Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/11933
Title: Effects of Nonunique Residual Traction on the Non-Repeatability of the Dynamics of Jointed Structures
Authors: Bhattu, Arati
Lo, Yi-Chun
Zara, Gianmarco
Hippold, Patrick
Fochler, Daniel
Gross, Johann
Ferhatoglu, Erhan
Keywords: Uncertainty
Friction
Nonlinear Vibration
Publisher: Springer international Publishing Ag
Series/Report no.: Conference Proceedings of the Society for Experimental Mechanics Series
Abstract: The tangential friction force of a permanently sticking contact (referred to as residual traction) can have an arbitrary (nonunique) value within the limits defined by the Coulomb cone. However, the actual value of residual traction is unknown due to its dependence on the load history. This uncertainty can introduce significant variability, ranging from 20 to 300 percent, in the level of resonant vibration, as observed in experiments of structures with friction dampers. In this study, we systematically investigate, for the first time, the influence of nonunique residual traction on the vibration response variability of a system with bolted joints. The selected benchmark consists of an L-shaped beam and a cross beam (stiffener) connected by two joints. The joints are aligned under 90-degree angle, establishing a structural coupling between the tangential and normal directions of the contacts. Both experimental and numerical analyses are conducted to assess the effects in detail. In the experimental phase, phase-locked-loop testing is employed to measure the amplitude-dependent modal parameters. On the computational side, the structure is modelled using commercial finite element software, and quasi-static modal analysis is employed. The results show to what extent the nonuniqueness of residual traction contributes to the non-repeatability of the vibration response and the accuracy of the correlation between experiments and numerical analyses.
URI: https://doi.org/10.1007/978-3-031-69409-7_11
ISBN: 9783031694110
9783031694097
9783031694080
ISSN: 2191-5644
2191-5652
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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