Journal ArticleDOI
Development of an adaptive tuned vibration absorber with magnetorheological elastomer
TLDR
In this paper, an adaptive tuned vibration absorber (ATVA) based on the unique characteristics of magnetorheological elastomers (MREs), whose modulus can be controlled by an applied magnetic field.Abstract:
In this technical note we develop an adaptive tuned vibration absorber (ATVA) based on the unique characteristics of magnetorheological elastomers (MREs), whose modulus can be controlled by an applied magnetic field. The MRE used in the developed ATVA was prepared by curing a mixture of 704 silicon rubber, carbonyl iron particles and a small amount of silicone oil under a magnetic field. The ATVA works in shear mode and consists of an oscillator, smart spring elements with MREs, a magnet conductor and two coils. Natural frequencies of the ATVA under different magnetic fields were both theoretically analyzed and experimentally evaluated by employing a beam structure with two ends supported. The experimental results demonstrated that the natural frequency of the ATVA can be tuned from 55 to 82 Hz. The relative frequency change is as high as 147%. Furthermore, the absorption capacity of the developed ATVA can achieve as high as 60 dB, which was also experimentally justified.read more
Citations
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Journal ArticleDOI
A state-of-the-art review on magnetorheological elastomer devices
TL;DR: In this paper, the authors present a state-of-the-art review on the recent progress of magnetorheological elastomer technology, with special emphasis on the research and development of MR elastomers and their applications.
Journal ArticleDOI
Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications†
TL;DR: Magnetorheological (MR) materials are classified as smart materials due to their responsiveness to external magnetic stimuli as discussed by the authors, and they have led to broad applications in several potential fields.
Journal ArticleDOI
Mechanics of hard-magnetic soft materials
TL;DR: In this article, the authors developed a suitable theoretical framework to analyze hard-magnetic soft materials to facilitate the rational design of magnetically activated functional structures and devices based on a quantitative prediction of complex shape changes.
Journal ArticleDOI
Tuned, driven, and active soft matter
TL;DR: In this article, a review of soft-matter systems that are quasi-statically tuned or switched to a new state by applying external external fields is presented, including those that are driven out of their ground state and out of equilibrium.
Journal ArticleDOI
Viscoelastic properties of MR elastomers under harmonic loading
Weihua Li,Yang Zhou,Tongfei Tian +2 more
TL;DR: In this article, a four-parameter linear viscoelastic model was proposed to predict MRE performances under various working conditions (magnetic field, strain amplitude, and frequency).
References
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Journal ArticleDOI
MR fluid, foam and elastomer devices
J. David Carlson,Mark R. Jolly +1 more
TL;DR: Magnetorheological (MR) fluids, foams and elastomers comprise a class of smart materials whose rheological properties may be controlled by the application of an external magnetic field.
Journal ArticleDOI
The Magnetic Fluid Clutch
TL;DR: A new type of magnetic fluid and several classes of new devices utilizing this fluid have been developed at the National Bureau of Standards as discussed by the authors, and one application of this fluid has been in electromagnetic clutches, but the electro-magnetically controlled mixture offers promise for other uses also.
Journal ArticleDOI
An experimental study of MR dampers for seismic protection
TL;DR: In this paper, the performance of magnetorheological dampers for seismic response reduction is examined and the results indicate that the MR damper is quite effective for structural response reduction over a wide class of seismic excitations.
Journal ArticleDOI
Model of magnetorheological elastomers
TL;DR: In this paper, the authors used finite element analysis to show that the shear modulus of typical elastomers is about 50% of the zero-field modulus at saturation and the optimum particle volume fraction for the largest fractional change in modulus is predicted to be 27%.
Journal ArticleDOI
Rheology of magnetorheological fluids: models and measurements
TL;DR: In this paper, numerical and analytical models of magnetorheological fluid phenomena that account explicitly for the effects of magnetic nonlinearity and saturation are described, and the field-dependent stress required to shear the chains was then obtained using the Maxwell stress tensor.