Stochastic modelling and updating of a joint contact interface

Jalali, Hassan, Khodaparast, H. Haddad, Madinei, H. and Friswell, M.I. (2019) Stochastic modelling and updating of a joint contact interface. Mechanical Systems and Signal Processing, 129. pp. 645-658. ISSN 0888-3270

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Dynamic properties of the contact interfaces in joints and mechanical connections have a great influence on the overall dynamic properties of assembled structures. Uncertainty and nonlinearity are two major effects of contact interfaces which introduce challenges in accurate modeling. Randomness in surface roughness quality, surface finish and contact preload are the main sources of variability in the contact interfaces. On the other side, slip and slap are two mechanisms responsible for nonlinear behavior of joints. Stochastic linear/nonlinear models need to be developed for such uncertain structures to be used in dynamic response analysis or system parameter identification. In this paper, variability in linear behavior of an assembled structure containing a bolted lap-joint is investigated by using experimental results. A stochastic model is then constructed for the structure by employing a stochastic generic joint model and the uncertainty in the joint model parameters is identified by using a Bayesian identification approach.

Item Type: Article
Uncontrolled Keywords: Preload, Stochastic modelling, Structural joints, Surface roughness, Uncertainty
Subjects: H300 Mechanical Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 27 Jul 2020 14:06
Last Modified: 31 Jul 2021 12:01

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