Flutter and bifurcation instability analysis of fluid-conveying micro-pipes sandwiched by magnetostrictive smart layers under thermal and magnetic field

Flutter and bifurcation instability analysis of fluid-conveying micro-pipes sandwiched by magnetostrictive smart layers under thermal and magnetic field

Fluid-conveying micro/Nano structures are key tools in MEMS and NEMS applications especially for drug delivery systems to attack a specific tumor like cancer cells. Vibrational characteristics of such tools play a crucial role in delivering efficient and reliable performance in various applications....

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Bibliographic Details
Published in:International journal of mechanics and materials in design Vol. 16; no. 3; pp. 569 - 588
Main Authors: Amiri, Ahad, Masoumi, Arian, Talebitooti, Roohollah
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-09-2020
Springer Nature B.V
Subjects:
Actuators
Bifurcations
Characterization and Evaluation of Materials
Classical Mechanics
Control stability
Conveying
Critical flow
Drug delivery systems
Eigenvalues
Engineering
Engineering Design
Euler-Bernoulli beams
Flow velocity
Flutter analysis
Galerkin method
Magnetic properties
Magnetostriction
Nanoelectromechanical systems
Sandwich structures
Solid Mechanics
Stability analysis
Temperature effects
Vibration control
Bifurcation
Velocity feedback gain
Critical flow velocity
Flutter
Magnetostrictive
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Summary:Fluid-conveying micro/Nano structures are key tools in MEMS and NEMS applications especially for drug delivery systems to attack a specific tumor like cancer cells. Vibrational characteristics of such tools play a crucial role in delivering efficient and reliable performance in various applications. As a result, vibration and instability control of such systems is of great importance. Vibration and instability response of magnetostrictive sandwich cantilever fluid-conveying micro-pipes is investigated in this paper utilizing smart magnetostrictive layers as actuators. Euler–Bernoulli beam model together with modified couple stress theory (MCST) are used to model the problem. As main properties of these smart layers, magnetic intensity effect, velocity feedback gain and thermal effects are taken into account in the modeling. The governing equation is extracted employing Hamilton’s principle. Extended Galerkin procedure is applied to discretize the governing equation and obtain the eigenvalue problem which is solved straightforwardly to reach the eigenvalues. Afterwards, eigenvalue diagrams are studied to analyze the vibrational characteristics and possible instabilities (flutter and bifurcation) occurring in first three modes of the system. Throughout this analysis, the role of various intrinsic properties of the magnetostrictive layers on the critical flow velocity and frequency is studied in detail. The numerical results show a good ability for the used smart layers to control the instability of fluid-conveying micro-pipes. Therefore, these sandwich structures may be helpful for achieving a novel design for such systems.
ISSN:1569-1713
1573-8841
DOI:10.1007/s10999-020-09487-w