Effect of thickness ratio on the slip damping of jointed aluminium cantilever beams Online publication date: Tue, 30-Sep-2014
by R.C. Mohanty; B.K. Nanda
International Journal of Design Engineering (IJDE), Vol. 4, No. 3, 2011
Abstract: Estimating damping in structures made of different materials is one of the biggest challenges in the field of structural dynamics. Significant weight savings and good mechanical as well as damping properties can make aluminium a potential material for most of the engineering applications especially in aerospace, automotive and manufacturing industries. This paper summarises the effect of thickness ratio on the mechanism of slip damping in jointed aluminium cantilever beams with riveted joints. The solution considers one-dimensional dynamic analysis using the finite element approach for the Euler-Bernoulli beam model. The cubic shape functions are considered for the transverse vibration of the beam in terms of nodal variables. Experiments are conducted for validating the numerical results. The results establish that the damping in jointed beams of lower thickness ratio can be appreciably improved using larger cantilever length and rivet diameter.
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