Dynamic properties of an axially moving sandwich beam with magnetorheological fluid core

Wei, Minghai; Sun, Li; Hu, Gang

doi:10.1177/1687814017693182

Cited by 28 publications

(13 citation statements)

References 31 publications

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“…Asgari and Kouchakzadeh 13 studied the supersonic aeroelastic instability of the MRF core layer sandwich beam. Wei et al 14 numerically studied the effect of thickness variation of aluminum sandwich beam with an MRF core on damping and dynamic response. Naji et al 15 numerically studied the dynamic responses of composite beams with the MRF core.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the natural frequency and damping ratio of the MRF core sandwich beams increased with an increase in the applied magnetic flux density. [8][9][10][11][12][13][14][15][16][17][18][19][20] From the literature, it is observed that many researches have been done on aluminum sandwich beam with MRF core. The studies on the CGRP-PMC-MRF core sandwich beam are yet to be explored.…”

Section: Introductionmentioning

confidence: 99%

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Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

Allien

Kumar

Desai

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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The semi-active vibration control of sandwich beams made of chopped strand mat glass fiber reinforced polyester resin polymer matrix composite (PMC) and magnetorheological fluid (MRF) core were experimentally investigated in this study. Two-, four- and six-layered glass fiber reinforced polyester resin polymer matrix composites were prepared using the hand-layup technique. The magnetorheological fluid was prepared in-house with 30% volume of carbonyl iron powder and 70% volume of silicone oil. Nine cantilever sandwich beams of varying thicknesses of the top and bottom layers glass fiber reinforced polyester resin polymer matrix composite beams and middle magnetorheological fluid core were prepared. The magnetorheological fluid core was activated with a non-homogeneous magnetic field using permanent magnets. The first three modes, natural frequencies and damping ratios of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams were determined through free vibration analysis using DEWESoft modal analysis software. The amplitude frequency response of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams through forced vibration analysis was determined using LabVIEW. The effect of various parameters such as magnetic flux density, thickness of glass fiber reinforced polyester resin polymer matrix composite layers and magnetorheological fluid core layer on the natural frequencies, damping ratio and vibration amplitude suppressions of the glass fiber reinforced polyester resin polymer matrix composite-magnetorheological fluid core sandwich beams was investigated. Based on the results obtained, 2 mm thickness top and bottom layers glass fiber reinforced polyester resin polymer matrix composite and 5 mm thickness magnetorheological fluid core sample have achieved a high shift in increased natural frequency, damping ratio and vibration amplitude suppression under the influence of magnetic flux density.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

Allien

Kumar

Desai

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Because an MRF can produce a significantly higher yield force than an ERF, it is widely applied in many fields, such as in the control of unwanted vibrations in flexible structures. In this case, the MRF, which was sandwiched in outer structures (or skin layers), functioned as the damping core (or constraint layer), whose characteristics depended on the magnetic field that was applied to the fluid domain [ 4 , 5 , 6 ]. Generally, aluminum, carbon graphite, or steel, which are rigid, are employed as the skin layer.…”

Section: Introductionmentioning

confidence: 99%

Tunable Young’s Moduli of Soft Composites Fabricated from Magnetorheological Materials Containing Microsized Iron Particles

et al. 2020

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This study experimentally investigates the field-dependent Young’s moduli of soft composites, which are fabricated from two different magnetic-responsive materials; magnetorheological elastomer (MRE) and magnetorheological fluid (MRF). Four factors are selected as the main factors affecting Young’s modulus of soft composites: the amount of MRF, the channel pattern, shore hardness and carbonyl iron particle (CIP) concentration of the MRE layer. Five specimens are manufactured to meet the investigation of four factors. Prior to testing, the scanning electron microscopy (SEM) image is taken to check the uniform dispersion of the carbonyl iron particle (CIP) concentration of the MRE layer, and a magnetic circuit is constructed to generate the effective magnetic field to the specimen fixed at the universal tensile test machine. The force–displacement curve is directly measured from the machine and converted to the stress–strain relationship. Thereafter, the Young’s modulus is determined from this curve by performing linear regression analysis with respect to the considered factors. The tunability of the Young’s moduli of the specimens is calculated based on the experimental results in terms of two performance indicators: the relative percentage difference of Young's modulus according to the magnetic field, and the normalized index independent of the zero-field modulus. In the case of the relative percentage difference, the specimens without MRF are the smallest, and the ones with the highest CIP concentration are the largest. As a result of comparing the normalized index of each factor, the change in shore hardness and channel pattern have little effect on the tunability of Young’s moduli, and the amount of MRF injected and CIP concentration of MRE have a large effect. The results of this study are expected to provide basic guidelines for fabricating soft composites whose field-dependent Young’s moduli can be tuned by several factors with different effects.

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“…The passive energy dissipation method has been widely used in the seismic control of structures since the 1980s [1,2]. Dampers can be classified into metal, viscoelastic [3], viscous [4], tuned absorption dampers [5], smart materials based isolation and suspension system [6,7], recently developed smart materials based damping or negative stiffness structure [8][9][10], actively tuned damper and driver system [11,12], according to the energy dissipation methods, control force characteristics [13] as well as materials used. The metal damper has a certain stiffness, and its energy dissipation mechanism depends on the elastic-plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Mechanical Properties of Curved Metallic Plate Dampers

Jin

Zhang

2019

Applied Sciences

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This study proposes a novel curved steel plate damper to improve the seismic performance of structures. The theoretical analysis of the curved plate damper was carried out deriving formulas of key parameters of the curved plate damper including elastic lateral stiffness, yield strength, and yield displacement. Moreover, a cyclic loading test of four sets of specimens was conducted, and the hysteretic performance, ductility, energy dissipation performance, and strain of the specimens were studied. The results showed that the initial stiffness of the damper was large, no obvious damage was observed, and the hysteresis loop was full. The tested dampers had good deformation and energy dissipation performance. The stress variable rule of the damper was obtained by stress analysis, where the plastic deformation at the end of the semi-circular arc was large. The formula for various parameters of the damper was compared with experimental and numerical results; thus, the value of the adjustment coefficient was determined reasonable. Meanwhile, the rationality of the finite element model was also verified.

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Dynamic properties of an axially moving sandwich beam with magnetorheological fluid core

Cited by 28 publications

References 31 publications

Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

Semi-active vibration control of MRF core PMC cantilever sandwich beams: Experimental study

Tunable Young’s Moduli of Soft Composites Fabricated from Magnetorheological Materials Containing Microsized Iron Particles

Experimental Investigation on the Mechanical Properties of Curved Metallic Plate Dampers

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