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Axial stiffness of carbon black filled rubber bushings frequency and amplitude dependence
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.
Department of Applied Mechanics, CEIT and Tecnun (University of Navarra).
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0001-5760-3919
2007 (English)In: Kautschuk und Gummi, Kunststoffe, ISSN 0022-9520, Vol. 60, no 1-2, 43-48 p.Article in journal (Refereed) Published
Abstract [en]

A simple engineering model for the axial dynamic stiffness of carbon black filled rubber bushings in the frequency domain including amplitude dependence is presented. The axial stiffness is calculated by applying a newly developed rubber model to an equivalent strain of the strain state inside the bushing, thus yielding an equivalent shear modulus which is inserted into an analytical formula for the stiffness. Therefore, this procedure includes the Fletcher-Gent effect inside the bushing due to non-homogeneous strain states. An experimental verification is carried out on a commercially available bushing. Firstly, the model parameters are obtained from two different experiments: elastic and friction parameters are achieved from one quasistatic test performed at 0.1 Hz and 1 mm amplitude, while frequency dependence parameters are obtained from one dynamic test at 0.1 mm of amplitude over a frequency range from 1 to 100 Hz. Secondly, new dynamic tests at five amplitudes are performed on the same bushing and the results are compared to those of the model showing good agreements.

Place, publisher, year, edition, pages
2007. Vol. 60, no 1-2, 43-48 p.
Keyword [en]
Amplitude dependence, Bushing measurement, Carbon black, Dynamic stiffness, Fletcher-Gent effect, Rubber bushing
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-5875ISI: 000244438600006Scopus ID: 2-s2.0-33847278846OAI: oai:DiVA.org:kth-5875DiVA: diva2:10400
Note

QC 20101112

Available from: 2006-06-01 Created: 2006-06-01 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Engineering rubber bushing stiffness formulas including dynamic amplitude dependence
Open this publication in new window or tab >>Engineering rubber bushing stiffness formulas including dynamic amplitude dependence
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Engineering design models for the torsion and axial dynamic stiffness of carbon black filled rubber bushings in the frequency domain including amplitude dependence are presented. They are founded on a developed material model which is the result of applying a separable elastic, viscoelastic and friction rubber component model to the material level. Moreover, the rubber model is applied to equivalent strains of the strain states inside the torsion or axial deformed bushing previously obtained by the classical linear theory of elasticity, thus yielding equivalent shear moduli which are inserted into analytical formulas for the stiffness. Therefore, unlike other simplified approaches, this procedure includes the Fletcher-Gent effect inside the bushing due to non-homogeneous strain states. The models are implemented in Matlab®. In addition, an experimental verification is carried out on a commercially available bushing thus confirming the accuracy of these models which become a fast engineering tool to design the most suitable rubber bushing to fulfil user requirements. Finally, they can be easily employed in multi-body and finite element simulations

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 28 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2006:36
National Category
Reliability and Maintenance
Identifiers
urn:nbn:se:kth:diva-4017 (URN)
Presentation
2006-06-15, Sal MWL 74, KTH, Teknikringen 8, Stockholm, 10:30
Opponent
Supervisors
Note
QC 20101112Available from: 2006-06-01 Created: 2006-06-01 Last updated: 2010-11-12Bibliographically approved

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Kari, Leif

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