Vibration control of composite shells using embedded actuating layers

Pradhan, S.C.; Reddy, J. N.

doi:10.1088/0964-1726/13/5/029

Cited by 20 publications

(13 citation statements)

References 22 publications

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“…(2.5), H is referred to the intensity of magnetic field of the magnetostrictive layers. The magnetic field is generated due to coil current I in the following form (Pradhan and Reddy, 2004;, Lee and Reddy, 2004)…”

Section: Basic Formulationsmentioning

confidence: 99%

“…In recent years, several materials called smart materials have been used in sensor/actuator applications in order to decrease and suppress vibration. Piezoelectric materials, magnetostrictive materials, electrostrictive materials, shape memory alloys and electro--rheological fluids are all from smart materials (Pradhan and Reddy, 2004). Magnetostrictive materials can serve both as solid-state actuators and as magnetic field sensors (Chopra and Sirohi, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Vibration suppression of truncated conical shells embedded with magnetostrictive layers based on first order shear deformation theory

Mohammadrezazadeh¹,

Jafari²

2019

Journal of Theoretical and Applied Mechanics

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Vibration phenomena in mechanical structures including conical shells are usually undesirable. In order to overcome this problem, this study investigates active vibration control of isotropic truncated conical shells containing magnetostrictive actuators. The first-order shear deformation theory and the Hamilton principle are handled to obtain vibration equations. Moreover, a negative velocity feedback control law is used to actively suppress the vibration. The Ritz and modified Galerkin methods are utilized to obtain results of shell vibration. The results are validated by comparison with the results of literature and finite element software. Finally, the effects of control gain value, magnetostrictive layers thickness, isotropic layer thickness, length and semi-vertex angle of the conical shell on vibration suppression characteristics are obtained in details.

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Section: Basic Formulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibration suppression of truncated conical shells embedded with magnetostrictive layers based on first order shear deformation theory

Mohammadrezazadeh¹,

Jafari²

2019

Journal of Theoretical and Applied Mechanics

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“…In the 1970s, carbon fiber was first used to reinforce UHMWPE for clinically relevant purposes [6]. In the past few decades, other fillers such as carbon nanotubes [7], graphite [8], hydroxyapatite [9], and renewable fillers like coconut shell powder [10] and wood fibers [11] have been used to improve the properties of UHMWPE. However, the limited improvement to various properties makes them impossible to fulfill the requirements of many applications.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, electrical, and thermal properties of highly filled bamboo charcoal/ultra‐high molecular weight polyethylene composites

Wang

Chen

et al. 2018

Polymer Composites

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Highly filled bamboo charcoal (BC)/ultra‐high molecular weight polyethylene (UHMWPE) composites were prepared using extrusion and hot‐compression molding methods. The addition of BC remarkably improved the tensile properties of UHMWPE composites. When the BC content reached 70 wt%, the tensile strength and Young's modulus rose from 28.0 and 326.6 MPa for the neat UHMWPE to 128.9 and 2,027.7 MPa, increasing by 360 and 520%, respectively. The incorporation of BC also significantly improved the creep resistance, especially at high temperature. The creep strains of the composites with 60, 70 and 80 wt% were reduced by 70.1, 78.3, and 85.2% compared to the neat UHMWPE at 80°C, respectively. To understand the mechanism, the Burger's model was employed to illustrate the influence of BC on the creep performance of the polymer composites. The addition of BC also increased the electrical conductivity of the composites: the composite with 80 wt% BC had a conductivity of 0.53 S/cm. Moreover, the thermal stability of BC/UHMWPE composites improved apparently with the increased charcoal loading. POLYM. COMPOS., 39:E1858–E1866, 2018. © 2018 Society of Plastics Engineers

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“…Ray and Mallik [16] theoretically investigated the effectiveness of piezoelectric fiber reinforced composite material in the development of new actuators as element of smart structures. Pradhan and Reddy [17] presented the analytical solutions of laminated composite shells with embedded actuating layers. Ray and Batra [18] analysed active constrained layer damping of functionally graded shells under a thermal environment and investigated the performance of PZCs as materials for the constraining layer of the ACLID treatment.…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of composite shallow shells: An integrated approach

Rahman¹,

Alam²,

Junaid³

2018

J. MECH. ENG. SCI.

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Active vibration control of smart composite shallow shells with distributed piezoelectric sensors and actuators is presented in this work. An integrated approach is used for recording the uncontrolled and controlled vibration response under pressure impulse load. The FE model developed in ABAQUS is utilized to generate the global mass, stiffness and load matrices of the system. The system matrices are arranged in statespace format and the dynamic equations of the system are obtained. The controlled responses are achieved using the inputs from FE model in ABAQUS in conjunction with the developed MATLAB codes for Constant Gain Velocity Feedback (CGVF) and Linear Quadratic Regulator (LQR) control strategies. The method is first validated by comparing the natural frequencies obtained using the ABAQUS generated matrices with that obtained using an FE model with four noded quadrilateral shallow shell element based on efficient zigzag theory. The shell element uses the concept of electric nodes to satisfy the equipotential condition of electrode surface. An 8-noded linear piezoelectric brick element is used for piezoelectric layers and an 8-noded quadrilateral continuum shell element is used for the elastic layers of hybrid shells for making the finite element mesh in ABAQUS. The non-dimensional natural frequencies and active vibration control responses for hybrid composite cylindrical and spherical shells are presented for clamped-clamped and cantilever boundary conditions. Boundary conditions have significant effect on vibration amplitude, control voltage and settling time. In comparison to CGVF controller, a better control in lesser time is achieved with LQR controller for a shell with similar boundary conditions. Larger gain values (G) are required for vibration control of thick shells.

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Vibration control of composite shells using embedded actuating layers

Cited by 20 publications

References 22 publications

Vibration suppression of truncated conical shells embedded with magnetostrictive layers based on first order shear deformation theory

Vibration suppression of truncated conical shells embedded with magnetostrictive layers based on first order shear deformation theory

Mechanical, electrical, and thermal properties of highly filled bamboo charcoal/ultra‐high molecular weight polyethylene composites

Active vibration control of composite shallow shells: An integrated approach

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