On vibration suppression of magnetostrictive beams

Reddy, J. N.; Barbosa, J. Infante

doi:10.1088/0964-1726/9/1/305

Cited by 84 publications

(52 citation statements)

References 6 publications

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“…Kumar et al [16] have analysed the damping characteristics obtained using a distributed magnetostrictive layer bonded to an aluminium beam for different boundary conditions and coil configurations, using a finite element formulation, physically consistent with the problem. A similar work has been carried out by Reddy and Barbosa [17] to study the vibration control of flexible beams, by promoting a spatially varying current throughout the length of the coil. Kannan and Dasgupta [18] presented a quasi-static variational principle and finite element scheme to model the nonlinear interactions between mechanical and magnetic fields in magnetostrictive materials.…”

Section: Introductionmentioning

confidence: 88%

Layerwise partial mixed finite element analysis of magneto-electro-elastic plates

Lage

Soares

Reddy

2004

Computers & Structures

146

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Section: Introductionmentioning

confidence: 88%

Layerwise partial mixed finite element analysis of magneto-electro-elastic plates

Lage

Soares

Reddy

2004

Computers & Structures

146

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“…Some common applications of the SMA fibres and SMA composites are in active vibration control [31], active buckling control, shape / motion control and artificial muscle. SMA composites can be fabricated using SMA fibres such that the material can be easily stiffened or controlled by passing electric current, which heats the SMA above the transition temperature.…”

Section: Shape Memory Alloys (Sma) and Shape Memory Polymers (Smp)mentioning

confidence: 99%

Active and passive interaction mechanism of smart materials for health monitoring of engineering structures: a review

Annamdas

2009

SPIE Proceedings

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Smart materials when interact with engineering structures, should have the capability to sense, measure, process, and detect any change in the selected variables (stress, damage) at critical locations. These smart materials can be classified into active and passive depending on the type of the structure, variables to be monitored, and interaction mechanism due to surface bonding or embedment. Some of the prominent smart materials are piezoelectric materials, micro fiber composite, polymers, shape memory alloys, electrostrictive and magnetostrictive materials, electrorheological and magnetorheological fluids and fiber optics. In addition, host structures do have the properties to support or repel the usage of smart materials inside or on it. This paper presents some of the most widely used smart materials and their interaction mechanism for structural health monitoring of engineering structures.

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“…Substituting Equations (4) and (5) into Equation (3), the elastic strain in any layer of the composite laminate takes the form; e-U'-yV11-8CV (5) where, 5' is 1 for the active layer and zero for the others. The constitutive relationship for different layers of the laminated beam is given by; = Em (1 + J7m )e (Magnetostrictive Layer) (6) = Epas (1 + J Tlpas )e (Passive Damping Coating) (7) o. = Q11(1+ J7h )e (kt layer of the laminate) (8) where, i7 denotes the loss-factor, v the Poisson's ratio and Q, are elastic constants8.…”

Section: Hhmentioning

confidence: 99%

<title>Hybrid vibration control of laminated composite structures using magnetostrictive and hard damping materials</title>

2001

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Smart laminated composites with layers of magnetostrictive andlor piezoelectric materials have been explored for active damping applications. Active vibration control in laminated structures with low inherent damping, may lead to instability. In some other cases like flexible appendages of satellites, design considerations may impose constraints in collocated sensing and actuation in structure which would also cause degradation in system performance if only active control is used. Ideally, both structural damping and active control are desirable to achieve good dynamic performance. Of late, hard ceramic materials with hysteretic stress-strain behavior are used in passive vibration control. Because of high strain dependency of the damping in these materials, especially near the high damping regime, it is possible to enhance the amount of passive damping by active control of strain in the passive layer. Because of the layered structure in laminates, several interesting possibilities for hybrid damping exist and a few of them are proposed and explored in the present study. Smart composites with magnetostrictive (Terfenol-D) layers and strain dependent ceramic andlor ferroelectric Passive Damping(PD) layers are considered. The damping achieved in the PD layers is controlled by varying their location and/or the amount of gain in the active controller. Both frequency and time domain studies are carried out to investigate the performance of proposed hybrid damping systems. Simulations using recently developed smart beam elements are carried out on laminates with several configurations of active and passive layers. The simulation brings out the significance and the exploitation of strain dependency of passive damping on the overall damping of the hybrid system.

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On vibration suppression of magnetostrictive beams

Cited by 84 publications

References 6 publications

Layerwise partial mixed finite element analysis of magneto-electro-elastic plates

Layerwise partial mixed finite element analysis of magneto-electro-elastic plates

Active and passive interaction mechanism of smart materials for health monitoring of engineering structures: a review

<title>Hybrid vibration control of laminated composite structures using magnetostrictive and hard damping materials</title>

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