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Dynamic stiffness prediction of filled rubber mounts: Comparison between a fractional derivative viscoelastic-elastoplastic model and a simplified procedure
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0001-5760-3919
2005 (English)In: Constitutive Models for Rubber IV: Proceedings of the 4th European Conference for Constitutive Models for Rubber, ECCMR 2005, 2005, 479-485 p.Conference paper (Refereed)
Abstract [en]

A time domain non-linear model is presented to predict the dynamic stiffness of rubber isolators using a FE code. The problem of simultaneously modelling elastic, viscoelastic and friction contributions is removed by additively splitting them. Viscoelastic response is modelled via a fractional derivative model, while amplitude dependency is considered through Coulomb friction elements. Nevertheless, determination of the dynamic stiffness takes long time and requires large amount of memory, as well as the estimation of the transfer function between applied excitation and resulting forces at different frequency and amplitude values. This is why a frequency domain simplified procedure is also proposed to obtain the dynamic stiffness. The technique is based on providing a generalized Maxwell model with the adequate material data set, once the dynamic strain amplitude, to which the mount is subjected, is estimated from quasi-static strain values. The methodology has proved to be efficient and easy to be applied.

Place, publisher, year, edition, pages
2005. 479-485 p.
, Constitutive Models for Rubber IV - Proceedings of the 4th European Conference for Constitutive Models for Rubber, ECCMR 2005
Keyword [en]
Amplitude dependency, Coulomb frictions, Different frequency, Dynamic stiffness, Dynamic strain, Filled rubbers, Fractional derivative model, Fractional derivatives, Frequency domains, Generalized Maxwell model, Material data, Non-linear model, Quasi-static strains, Rubber isolators, Simplified procedure, Time domain, Viscoelastic response, Constitutive models, Frequency estimation, Stiffness, Time domain analysis, Rubber
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-156266ScopusID: 2-s2.0-67649554009ISBN: 0415383463ISBN: 9780415383462OAI: diva2:767747
4th European Conference for Constitutive Models for Rubber, ECCMR 2005, 27 June 2005 through 29 June 2005, Stockholm, Sweden

QC 20141202

Available from: 2014-12-02 Created: 2014-11-26 Last updated: 2014-12-02Bibliographically approved

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Kari, Leif
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