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A finite strain viscoplastic constitutive model for filled rubber
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-1036-6837
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0001-5760-3919
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
2015 (English)In: 22nd International Congress on Sound and Vibration, ICSV 2015, International Institute of Acoustics and Vibrations , 2015Conference paper (Refereed)
Abstract [en]

A phenomenological material model for carbon black filled natural rubber based on the multiplicative split of the deformation gradient is implemented for finite strains in three dimensions. This is a generalising of the authors previous work, where the uniaxial rheological equivalent is a smooth friction element in series with a generalized Maxwell chain. The aim of the paper is to demonstrate the advantage of this viscoplastic modelling approach. With only 5 material parameters, the storage and loss modulus is calculated for strain amplitudes between 0.2-50% strain and 0.5-20 Hz, with very encouraging results. These are reasonable ranges of interest when designing the reliability of load bearing components, such as vibration isolators for drivelines in the automotive industry. The Fletcher-Gent effect is well captured, where the strain rate dependency on the storage modulus is higher at smaller strain amplitudes. In addition, the storage and loss modulus are similar to measurements in literature, both in value and shape over the entire range of amplitudes and frequencies. It should be emphasized that capturing both the storage and loss modulus of a material is essential for a material model's capability to describe more complex loading situations than sinusoidal loading. A future implication of the developed model is that it enables realistic simulation of vibration isolators early in the design process whereby extensive physical testing can be reduced, saving both time and money.

Place, publisher, year, edition, pages
International Institute of Acoustics and Vibrations , 2015.
Keyword [en]
Automotive industry, Carbon, Carbon black, Filled polymers, Rubber, Storage (materials), Strain, Deformation gradients, Fletcher-Gent effect, Load-bearing components, Realistic simulation, Storage and loss modulus, Strain rate dependency, Vibration isolators, Viscoplastic constitutive modeling, Strain rate
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-194706ScopusID: 2-s2.0-84971287161ISBN: 9788888942483OAI: oai:DiVA.org:kth-194706DiVA: diva2:1048759
Conference
22nd International Congress on Sound and Vibration, ICSV 2015, 12 July 2015 through 16 July 2015
Note

QC 20161122

Available from: 2016-11-22 Created: 2016-10-31 Last updated: 2016-11-22Bibliographically approved

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Österlöf, RichardKari, LeifWentzel, Henrik
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Marcus Wallenberg Laboratory MWLVinnExcellence Center for ECO2 Vehicle designSolid Mechanics (Dept.)
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