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Numerical modelling of metal-elastomer spring nonlinear response for low-rate deformations

Sikora W., Michalczyk K., Machniewicz T.

Acta Mechanica et Automatica

2018

Vol. 12, no. 1

31--37

Advanced knowledge of mechanical characteristics of metal-elastomer springs is useful in their design process and selection. It can also be used in simulating dynamics of machine where such elements are utilized. Therefore this paper presents a procedure for preparing and executing FEM modelling of a single metal-elastomer spring, also called Neidhart’s spring, for low-rate deformations. Elastomer elements were made of SBR rubber of two hardness values: 50°Sh and 70°Sh. For the description of material behaviour the Bergström-Boyce model has been used.

Static and Dynamic Properties of Metal-Elastomer Helical Spring With Rectangular Wire Cross-Section

Michalczyk K., Salwiński J., Sikora W.

Machine Dynamics Research

2017

Vol. 41, No. 2

49--58

The analysis of the influence of the elastomeric element’s geometrical and material parameters on selected static and dynamic properties of metal-elastomer spring with rectangular cross-section is presented in this paper. Numerical FEM simulations presented in the paper revealed that application of even the relatively soft rubber of 50 [Sh°A] hardness as an elastomeric element may contribute to significant increase of spring stiffness. Experimental tests considering static and dynamic properties of the analyzed spring were also performed, utilizing three different types of elastomeric foam. Performed tests demonstrated high efficiency of analyzed construction in terms of vibration damping.

A study of the preload force in metal-elastomer torsion springs

Sikora W., Michalczyk K., Machniewicz T.

Acta Mechanica et Automatica

2016

Vol. 10, no. 4

300--305

Neidhart type suspension units composed of metal-elastomer torsion springs can be a good alternative to steel helical springs in applications such as vibration absorbers or vehicle suspension systems. Assembling this type of spring requires initial preload of the elastomeric working elements, which determines their operating properties.The results of experimental tests and numerical simulations concerning the preload of elastomeric working elements in Neidhart type suspension units are presented in the paper. The performed research made it possible to propose a new calculation model for determining the preload force value acting on the elastomeric cylindrical elements applied in this type of suspension unit. The results obtained using the proposed model exhibit good convergence with FEM simulation results within the range of the tested geometrical and material properties.