Journal ArticleDOI
Vibration analysis of a multi-layer beam containing magnetorheological fluid
TLDR
In this paper, the authors investigated the properties of a multi-layered beam with MR fluid as a sandwich layer between the two layers of the continuous elastic structure and formulated the governing equations of a multilayer MR beam in the finite element form and using the Ritz method.Abstract:
Magnetorheological (MR) materials exhibit rapid variations in their rheological properties when subjected to varying magnetic field and thus offer superior potential for applications in smart structures requiring high bandwidth. MR sandwich structures can apply distributed control force to yield variations in stiffness and damping properties of the structure in response to the intensity of the applied magnetic field and could thus provide vibration suppression over a broad range of external excitation frequencies. This study investigates the properties of a multi-layered beam with MR fluid as a sandwich layer between the two layers of the continuous elastic structure. The governing equations of a multi-layer MR beam are formulated in the finite element form and using the Ritz method. A free oscillation experiment is performed to estimate the relationship between the magnetic field and the complex shear modulus of the MR materials in the pre-yield regime. The validity of the finite element and Ritz formulations developed is examined by comparing the results from the two models with those from the experimental investigation. Various parametric studies have been performed in terms of variations of the natural frequencies and loss factor as functions of the applied magnetic field and thickness of the MR fluid layer for various boundary conditions. The forced vibration responses of the MR sandwich beam are also evaluated under harmonic force excitation. The results illustrate that the natural frequencies could be increased by increasing the magnetic field while the magnitudes of the peak deflections could be considerably decreased, which demonstrates the vibration suppression capability of the MR sandwich beam.read more
Citations
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Journal ArticleDOI
Vibration behavior of magnetorheological‐filled functionally graded nanocomposite cylinders reinforced by carbon nanotube
TL;DR: In this article, the free vibration and damping behavior of functionally graded (FG) nanocomposite cylinders reinforced by carbon nano tube (CNT) subjected to magnetic field are investigated by finite element method (FEM).
Effects of important geometrical and physical parameters on free vibration and impact force for sandwich plates with smart flexible cores
TL;DR: In this article, the effects of important physical and geometrical parameters on free vibration and impact response of a three-layer sandwich plate with magneto rheological smart core were investigated.
Journal ArticleDOI
Dynamic instability, free vibration, and buckling analysis of MR fluid sandwich plates with FG face layers using the HSDT-based finite strip method
Book ChapterDOI
Vibration suppression of mr sandwich beams based on fuzzy logic
TL;DR: In this paper, a three-layered beam including magnetorheological elastomer layer sandwiched between two elastic layers is considered, where the appropriate magnetic field is chosen through a fuzzy controller for improving the transient response.
Journal ArticleDOI
Evanescent morphing for tuning the dynamic behavior of composite lightweight structures: Theoretical assessment
TL;DR: In order to reduce environmental and health risks, the vibrations have to be decreased prefe... as discussed by the authors, which often leads to a problematic vibration susceptibility of the components, and therefore, a weight-reduction focused design can lead to vibration susceptibility.
References
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Journal ArticleDOI
State of the art of structural control
TL;DR: In this paper, the authors review the recent and rapid developments in semi-active structural control and its implementation in full-scale structures, and present an alternative to active and hybrid control for structural vibration reduction.
Journal ArticleDOI
The forced vibration of a three-layer, damped sandwich beam with arbitrary boundary conditions
D.J. Mead,Š. Markuš +1 more
TL;DR: In this article, the transverse displacement of a three-layer sandwich beam with a viscoelastic core is derived in terms of the transversal displacement, w, for a 3D beam.
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
Theory of Vibratory Bending for Elastic and Viscoelastic Layered Finite-Length Beams
Journal ArticleDOI
MR damper and its application for semi-active control of vehicle suspension system
TL;DR: In this article, a semi-active control of vehicle suspension system with magnetorheological (MR) damper is presented and performance testing is done for this damper with INSTRON machine.
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