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Giant extensional strain of magnetoactive elastomeric cylinders in uniform magnetic fields

  • Elongations of magnetoactive elastomers (MAEs) under ascending–descending uniform magnetic fields were studied experimentally using a laboratory apparatus specifically designed to measure large extensional strains (up to 20%) in compliant MAEs. In the literature, such a phenomenon is usually denoted as giant magnetostriction. The synthesized cylindrical MAE samples were based on polydimethylsiloxane matrices filled with micrometer-sized particles of carbonyl iron. The impact of both the macroscopic shape factor of the samples and their magneto-mechanical characteristics were evaluated. For this purpose, the aspect ratio of the MAE cylindrical samples, the concentration of magnetic particles in MAEs and the effective shear modulus were systematically varied. It was shown that the magnetically induced elongation of MAE cylinders in the maximum magnetic field of about 400 kA/m, applied along the cylinder axis, grew with the increasing aspect ratio. The effect of the sample composition is discussed in terms of magnetic filler rearrangements in magnetic fields and the observed experimental tendencies are rationalized by simple theoretical estimates. The obtained results can be used for the design of new smart materials with magnetic-field-controlled deformation properties, e.g., for soft robotics.

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Metadaten
Author:Dmitry V. SavelievORCiD, Inna A. Belyaeva, Dmitri V. ChashinORCiD, Leonid Y. FetisovORCiD, Dirk RomeisORCiD, Wolfgang Kettl, Elena Yu Kramarenko, M. Saphiannikova, Gennady V. StepanovORCiD, Mikhail Shamonin (Chamonine)ORCiDGND
DOI:https://doi.org/10.3390/ma13153297
ISSN:1996-1944
Parent Title (English):Materials
Publisher:MDPI
Place of publication:Basel
Document Type:Article
Language:English
Year of first Publication:2020
Release Date:2022/01/19
Tag:extensional strain; hysteresis; magnetoactive elastomer; magnetodeformation; magnetomechanical effect; magnetostriction
Volume:13
Issue:15
Article Number:3297
First Page:1
Last Page:17
Note:
Corresponding author: Mikhail Shamonin
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Labor Intelligente Materialien und Strukturen
Begutachtungsstatus:peer-reviewed
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
Corresponding author der OTH Regensburg
research focus:Energie und Mobilität
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International