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Dynamic properties of magneto-sensitive materials for semi-active noise and vibration control: Measurement and modelling
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0001-5760-3919
2012 (English)In: Noise and Vibration: Emerging Methods, 2012Conference paper (Other academic)
Abstract [en]

The dynamic properties of magneto-sensitive material are experimentally investigated where the influence of preload, frequency, vibration amplitude, magnetic field strength and temperature on the shear modulus is studied. The material is natural rubber containing irregularly shaped, magnetically polarizable iron particles by a volume fraction of 33%. Magneto-sensitive materials are able to change instantly and reversibly their mechanical properties under the influence of an external magnetic field and are thus very suitable for semi-active noise and vibration control. It is shown that the magneto-sensitivity effect increases with increased magnetic field strength up to magnetic saturation and with decreased vibration amplitude. The temperature dependence is partly similar to that of ordinary rubber. Finally, modeling of magneto-sensitive materials is discussed including preload, frequency and vibration amplitude dependence.

Place, publisher, year, edition, pages
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Applied Mechanics
URN: urn:nbn:se:kth:diva-82525OAI: diva2:498320
Noise and Vibration: Emerging Methods 2012 Sorrento, Italy
TrenOp, Transport Research Environment with Novel Perspectives

QC 20130110

Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2013-04-10Bibliographically approved

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Kari, Leif
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MWL Structural and vibroacoustics
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