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Viscoelastic Modeling of Automotive Bushing for Axial Mode  

Lee, Seong-Beom (School of Mechanical & Automotive Engineering, Inje University)
Lee, Su-Young (Department of Mechanical Engineering, Graduate School, Inje University)
Publication Information
Elastomers and Composites / v.39, no.3, 2004 , pp. 228-233 More about this Journal
Abstract
A bushing is a device used in automotive suspension systems to reduce the load transmitted from the wheel to the frame of the vehicle. A bushing is a hollow cylinder, which is bonded to a solid steel shaft at its inner surface and a steel sleeve at its outer surface. The relation between the force applied to the shaft and the relative deformation of a bushing is nonlinear and exhibits features of viscoelasticity. Since a force-displacement relation for bushings is important for multibody dynamics numerical simulations, the relation is expressed in terms of a force relaxation function and a method of determination by experiments on bushings has been developed. For the nonlinear viscoelastic axial response, Pipkin-Rogers model, the direct relation of force and displacement, has been derived from experiment. It is shown that the predictions by the proposed force-displacement relation are in very good agreement with the experimental results.
Keywords
Nonlinear viscoelastic material; Automotive bushing; Pipkin-Rogers model;
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