Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Engineering rubber bushing stiffness formulas including dynamic amplitude dependence
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
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: urn:nbn:se:kth:diva-4017OAI: oai:DiVA.org:kth-4017DiVA: diva2:10401
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
List of papers
1. Torsion stiffness of a rubber bushing: a simple engineering design formula including amplitude dependence
Open this publication in new window or tab >>Torsion stiffness of a rubber bushing: a simple engineering design formula including amplitude dependence
2007 (English)In: Journal of Strain Analysis for Engineering Design, ISSN 0309-3247, E-ISSN 2041-3130, Vol. 42, no 1, 13-21 p.Article in journal (Refereed) Published
Abstract [en]

An engineering design formula for the torsion stiffness of a filled rubber bushing in the frequency domain, including the amplitude dependence, is presented. It is developed by applying a novel separable elastic, viscoelastic, and friction material model to an equivalent strain of the strain state inside the bushing, thus leading to an equivalent shear modulus that is inserted into an analytical formula for the torsion stiffness. The rubber model is the result of extending the force-displacement relation established in a sound rubber component model to the stress-strain level. Unlike other simplified methods, this procedure takes into account the variation in the properties inside the bushing owing to non-homogeneous strain states. Moreover, as this formula depends on the bushing geometry in addition to the material properties, it is a fast engineering tool to design the most suitable rubber bushing to fulfil user requirements. Furthermore, it is shown-by dividing the considered bushing into several slices, consequently each equivalent shear modulus is closer to the true value - that the approach of working with only one equivalent shear modulus for the whole bushing is accurate enough.

Keyword
filled rubber bushing, torsion stiffness, amplitude dependence, equivalent modulus
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-5874 (URN)10.1243/03093247JSA246 (DOI)000244122200002 ()2-s2.0-33846781423 (Scopus ID)
Note

QC 20101112

Available from: 2006-06-01 Created: 2006-06-01 Last updated: 2017-12-14Bibliographically approved
2. Axial stiffness of carbon black filled rubber bushings frequency and amplitude dependence
Open this publication in new window or tab >>Axial stiffness of carbon black filled rubber bushings frequency and amplitude dependence
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.

Keyword
Amplitude dependence, Bushing measurement, Carbon black, Dynamic stiffness, Fletcher-Gent effect, Rubber bushing
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-5875 (URN)000244438600006 ()2-s2.0-33847278846 (Scopus ID)
Note

QC 20101112

Available from: 2006-06-01 Created: 2006-06-01 Last updated: 2017-12-14Bibliographically approved

Open Access in DiVA

fulltext(272 kB)25023 downloads
File information
File name FULLTEXT01.pdfFile size 272 kBChecksum MD5
6503f678189eef65f9215a2bbcb2eff42efaa1de878e9bebcdc435d30395a6529cfcb1c2
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Garcia, Maria-José
By organisation
Aeronautical and Vehicle Engineering
Reliability and Maintenance

Search outside of DiVA

GoogleGoogle Scholar
Total: 25023 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 2142 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf