Recent Advances in Sensing and Control of Flexible Structures Via Piezoelectric Materials Technology

Sunar, M.; Rao, Singiresu S.

doi:10.1115/1.3098923

Cited by 205 publications

(101 citation statements)

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“…Other example of mathematical models is led by the Department of Mechanical and Process Engineering in the ETH based in Zurich which has been working in smart controlled gas turbines to obtain fuel efficient-reliable operation [4].…”

Section: Mathematical Models Of Gas Turbinesmentioning

confidence: 99%

Mathematical Model Based on Newton’s Laws and in First Thermodynamic Law of a Gas Turbine

Gosebruch¹,

Martín²,

Rodriguez³

et al. 2017

Adv. sci. technol. eng. syst. j.

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Section: Mathematical Models Of Gas Turbinesmentioning

confidence: 99%

Mathematical Model Based on Newton’s Laws and in First Thermodynamic Law of a Gas Turbine

Gosebruch¹,

Martín²,

Rodriguez³

et al. 2017

Adv. sci. technol. eng. syst. j.

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“…These active sandwich structures can be applied into a variety of extended mechanical systems such as plates, panels, beams and bars or structures and there are countless engineering applications for these materials with controllable structural behavior, which include the control of vibrations and sound propagation [95]. Other type of active sandwhich structure consists of a viscoelastic damping solid layer constrained by a piezoelectric film [97,98], whose damping effect can be controlled by varying the voltage applied to the film. This latter approach may be somewhat effective, but it shows various shortcomings related with the performance of the piezoelectric ceramic materials, which maybe either inapplicable because of their weight, their brittleness or the fact that large, thin sections are difficult to fabricate.…”

Section: Active Sandwich Structuresmentioning

confidence: 99%

Complex Fluids in Energy Dissipating Systems

Galindo-Rosales

2016

Applied Sciences

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Abstract:The development of engineered systems for energy dissipation (or absorption) during impacts or vibrations is an increasing need in our society, mainly for human protection applications, but also for ensuring the right performance of different sort of devices, facilities or installations. In the last decade, new energy dissipating composites based on the use of certain complex fluids have flourished, due to their non-linear relationship between stress and strain rate depending on the flow/field configuration. This manuscript intends to review the different approaches reported in the literature, analyses the fundamental physics behind them and assess their pros and cons from the perspective of their practical applications.

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“…Although the piezoelectricity has a long history, its application to system control has happened only in recent years, practically in the late 1980s and in the 1990s. The past decade has witnessed a remarkable increase in the research of piezoelectricity pertaining to activities in system sensing and control, 2;3 The recent review papers by Crawley, 4 Newnham, 5 and Sunar and Rao 6 report the increasing trend of research in piezoelectrical sensing and actuation. Piezoelectricpolymerpolyvinylidene uoride (PVDF) and piezoceramics such as barium titanate (BaTiO 3 ) and lead zirconate titanate (PZT) are some piezoelectricmaterials used in various applications.…”

Section: Nomenclaturementioning

confidence: 99%

Finite element modeling of thermopiezomagnetic smart structures

Sunar¹,

Al-Garni²,

Ali³

et al. 2002

AIAA Journal

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Linear constitutive equations of a thermopiezomagnetic medium involving mechanical, electrical, magnetic, and thermal elds are presented with the aid of a thermodynamic potential. A thermopiezomagnetic medium can be formed by bonding together a piezoelectric and magnetostrictive composite. Two energy functionals are de ned. It is shown via Hamilton's principle that these functionals yield the equations of motion for the mechanical eld, Maxwell's equilibrium equations for the electrical and magnetic elds, and the generalized heat equation for the thermal eld. Finite element equations for the thermopiezomagnetic media are obtained by using the linear constitutive equations in Hamilton's principle together with the nite element approximations. The nite element equations are utilized on an example two-layer smart structure, which consists of a piezoceramic (barium titanate) layer at the bottom and a magnetoceramic (cobalt ferrite) layer at the top. An electrostatic eld applied to the piezoceramic layer causes strain in the structure. This strain then produces magnetic eld in the magnetoceramic layer.Nomenclature A = vector of magnetic potential B = vector of magnetic ux density b = matrix of electromagnetic coef cients c = matrix of elastic stiffness coef cients D = vector of electrical displacement E = vector of electrical eld intensity e = matrix of piezoelectric coef cients G = thermodynamic potential H = vector of magnetic eld intensity h = vector of external (applied) heat ux I = area moment of inertia about the neutral axis J = vector of volume current density K = matrix of heat conduction coef cients = matrix of piezomagnetic stress coef cients n = vector of surface normal P = vector of pyroelectric coef cients P b = vector of body forces P c = vector of concentrated forces P s = vector of surface forces q = vector of heat ux r = vector of thermomagnetic coef cients S = strain vector T = stress vector u = displacement vector W = heat source density ® = entropy constitutive coef cient " = matrix of dielectric coef cientś = entropy density 2 = absolute temperature 2 0 = reference temperature µ = small temperature variatioņ = vector of thermal stress coef cients ¹ = matrix of permeability coef cients ½ = mass density

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Recent Advances in Sensing and Control of Flexible Structures Via Piezoelectric Materials Technology

Cited by 205 publications

References 0 publications

Mathematical Model Based on Newton’s Laws and in First Thermodynamic Law of a Gas Turbine

Mathematical Model Based on Newton’s Laws and in First Thermodynamic Law of a Gas Turbine

Complex Fluids in Energy Dissipating Systems

Finite element modeling of thermopiezomagnetic smart structures

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