The Effect of Preload and Surface Roughness Quality on Linear Joint Model Parameters

H Jalali, H Haddad Khodaparast & MI Friswell (Swansea University)

Journal of Sound and Vibration, Vol. 447, 12 May 2019, pp. 186-204


The physical parameters of the contact interfaces, such as preload and surface roughness quality, significantly affect the stiffness of joints. Knowledge of the relationship between these interface parameters and the equivalent stiffness allows joints to be considered in the design stages of complex structures. Hence, this paper considers the effect of contact interface parameters on the identified equivalent stiffness parameters of joint models. First, a new generic joint model is proposed to model the contact interfaces. Then, the ability of three different joint models, including the new model proposed in this paper, to capture the linear effects of contact interfaces under different preloads and surface roughness qualities is investigated. Finally, it is concluded that the preload and surface roughness quality control the normal and shearing stiffness of the joint models respectively. Experimental investigations also reveal that a complex mechanism governs the energy dissipation in the contact interface.

Paper Availability

This material has been published in the Journal of Sound and Vibration, Vol. 447, 12 May 2019, pp. 186-204. Unfortunately the copyright agreement with Elsevier does not allow for the PDF file of the paper to be available on this website. However the paper is available from ScienceDirect - see the link below.

Link to paper using doi: 10.1016/j.jsv.2019.01.050

Journal of Sound and Vibration on ScienceDirect