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Journal articles on the topic 'Piezoefekt'

Author: Grafiati

Published: 28 June 2021

Last updated: 11 February 2022

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1

Afonin, Sergey M. "Optimal Control of a Multilayer Electroelastic Engine with a Longitudinal Piezoeffect for Nanomechatronics Systems." Applied System Innovation 3, no. 4 (December 1, 2020): 53. http://dx.doi.org/10.3390/asi3040053.

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A electroelastic engine with a longitudinal piezoeffect is widely used in nanotechnology for nanomanipulators, laser systems, nanopumps, and scanning microscopy. For these nanomechatronics systems, the transition between individual positions of the systems in the shortest possible time is relevant. It is relevant to solve the problem of optimizing the nanopositioning control system with a minimum control time. This work determines the optimal control of a multilayer electroelastic engine with a longitudinal piezoeffect and minimal control time for an optimal nanomechatronics system. The expressions of the control function and switching line are obtained with using the Pontryagin maximum principle for the optimal control system of the multilayer electroelastic engine at a longitudinal piezoeffect with an ordinary second-order differential equation of system. In this optimal nanomechatronics system, the control function takes only two values and changes once.

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2

LI GENG-YING, PAN TAO, and XIA XIAO-JIAN. "REMOTE MEASUREMENT OF PIEZOEFFECT." Acta Physica Sinica 46, no. 2 (1997): 400. http://dx.doi.org/10.7498/aps.46.400.

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3

Brazhe, R. A., A. I. Kochaev, and A. A. Sovetkin. "Piezoeffect in fluorographane-like 2D supracrystals." Physics of the Solid State 55, no. 10 (October 2013): 2094–96. http://dx.doi.org/10.1134/s1063783413100077.

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4

Luchaninov, A. G., A. V. Shil'nikov, and L. A. Shuvalov. "Domain reorientations and piezoeffect in PZT ceramics." Ferroelectrics 208-209, no. 1 (April 1998): 385–94. http://dx.doi.org/10.1080/00150199808014888.

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5

Ivanova, E. A., and Ya E. Kolpakov. "Piezoeffect in polar materials using moment theory." Journal of Applied Mechanics and Technical Physics 54, no. 6 (November 2013): 989–1002. http://dx.doi.org/10.1134/s0021894413060138.

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6

Rogacheva, Nelly. "Active vibration suppression of a beam using piezoeffect." E3S Web of Conferences 97 (2019): 03024. http://dx.doi.org/10.1051/e3sconf/20199703024.

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Operation of structures and equipment in dynamic conditions led to the problems of vibration isolation and vibration suppression. For vibration isolation and vibration suppression passive, active systems and their combinations are used. Passive vibration isolation usually consists in the fact that the protected object relies on extremely dimensional springs and vibration isolators. Vibration isolation systems containing only passive elastic and damping elements are called passive. Active vibration isolation and vibration damping systems use external energy sources. These are pneumatic, hydropneumatic and hydromechanical devices. Recently, electro-elastic and magneto-elastic systems [1], [2] began to be used for vibration isolation and active vibration suppression. As a rule, the analysis of the work of such systems consists in the development of an experimental layout and a schematic diagram. In this paper, a mathematically based model is used to solve the problem in question. The calculations are performed and the results are presented in the form of graphs.

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7

Luchaninov, A. G., A. V. Shil'nikov, L. A. Shuvalov, and I. Ju Shipkova. "The domain processes and piezoeffect in polycrystalline ferroelectrics." Ferroelectrics 98, no. 1 (October 1989): 123–26. http://dx.doi.org/10.1080/00150198908217576.

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8

Браже, Р. А., and Д. А. Долгов. "Поперечные пьезо- и пироэлектрический эффекты в 2D-наноаллотропах нитрида бора, обусловленные риплообразованием." Физика твердого тела 62, no. 8 (2020): 1265. http://dx.doi.org/10.21883/ftt.2020.08.49612.046.

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It is shown that the formation of ripples in the structure of 2D nanoallotropes of boron nitride leads to the occurrence of transverse piezo- and pyroelectric effects in them with temperature-dependent coefficients. The value of these coefficients for various 2D nanoallotropes is calculated. It has been shown that due to the low height of the ripples, the transverse piezoeffect in the considered nanoallotropes is three orders of magnitude weacker, while the pyroelectric effect is quite comparable to that in fluoragraphanes and can find practical application.

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9

Dul’kin, E. A., L. I. Grebenkina, D. I. Makar’ev, A. N. Klevtsov, and V. G. Gavrilyachenko. "Infinite anisotropy of the piezoeffect in PbTiO3-based ferroceramic." Technical Physics Letters 25, no. 11 (November 1999): 894–95. http://dx.doi.org/10.1134/1.1262674.

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10

Shlyahin, Dmitriy, and Olesya Ratmanova. "The task of direct piezoeffect for a bi-morth plate." MATEC Web of Conferences 196 (2018): 01006. http://dx.doi.org/10.1051/matecconf/201819601006.

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The research focuses on the dynamic axisymmetric task for a round bi-morph structure consisting of a metal support plate and a piezoceramic axially polarized plate. Its bending oscillations are carried out because of the actions of mechanical load (normal stresses) on its end surface, which is an arbitrary time and radial coordinate function. The rigid and hinged support of the plate cylindrical surface is taken into account. The value of the induced field is calculated by determining the potential on the metal support plate. To solve the task of the theory of the elasticity in a three-dimensional model, the authors apply the Hankel finite integral transformations along the axial coordinate and generalized transformation along the radial variable. Besides, at each stage of the study the standardization procedure is carried out. In the first case it is connected with the use of mixed boundary conditions along the radial coordinate to the mixed form, and in the second case heterogeneous boundary conditions are presented as homogenious. The obtained calculation ratios make it possible to determine the optimal thickness of the piezoceramic plate, which allows to make the most effective transformation of the external mechanical effect into an electrical signal. In addition, it is possible to determine changing characteristics of electromagnetic field according to the height of the piezoceramic plate. This principle can be used in the calculation and design of bi-morph systems with graded-varying thickness and rigidity.

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11

Leschhorn, Andreas, and Herbert Kliem. "Influence of the piezoeffect on static and dynamic ferroelectric properties." Journal of Applied Physics 114, no. 9 (September 7, 2013): 094105. http://dx.doi.org/10.1063/1.4820574.

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12

Gaska, R., J. W. Yang, A. Osinsky, A. D. Bykhovski, and M. S. Shur. "Piezoeffect and gate current in AlGaN/GaN high electron mobility transistors." Applied Physics Letters 71, no. 25 (December 22, 1997): 3673–75. http://dx.doi.org/10.1063/1.120477.

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13

Vopilkin, E. A., V. I. Shashkin, Yu N. Drozdov, V. M. Daniltsev, A. Yu Klimov, V. V. Rogov, and I. Yu Shuleshova. "Anisotropic piezoeffect in microelectromechanical systems based on epitaxial Al0.5Ga0.5As/AlAs heterostructures." Technical Physics 54, no. 10 (October 2009): 1476–80. http://dx.doi.org/10.1134/s1063784209100119.

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14

Karnaukhov, V. G., V. I. Kozlov, V. V. Mikhailenko, and S. V. Mikhailenko. "Planar oscillations and dissipative heating of viscoelastic plates with a piezoeffect." International Applied Mechanics 30, no. 2 (February 1994): 141–47. http://dx.doi.org/10.1007/bf00848513.

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15

Sergeenkov, Sergei A. "Electric‐field induced converse piezoeffect in screw dislocated YBa2Cu3O7−δthin films." Journal of Applied Physics 77, no. 9 (May 1995): 4831–33. http://dx.doi.org/10.1063/1.359525.

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16

Дмитрий, Шляхин. "NONAXISYMMETRIC DYNAMIC PROBLEM OF THE DIRECT PIEZOEFFECT FOR AXIALLY POLARIZED SOLID CYLINDER." PNRPU Mechanics Bulletin, no. 4 (December 25, 2015): 246–58. http://dx.doi.org/10.15593/perm.mech/2015.4.14.

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17

BURSIAN, E. V. "The Importance of the Unlocal Piezoeffect in Domain Structure Formation in Ferroelectrics." Ferroelectrics 307, no. 1 (January 2004): 177–79. http://dx.doi.org/10.1080/00150190490493014.

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18

Zhou, Dayu, Marc Kamlah, and Dietrich Munz. "Uniaxial Compressive Stress Dependence of the High-Field Dielectric and Piezoelectric Performance of Soft PZT Piezoceramics." Journal of Materials Research 19, no. 3 (March 2004): 834–42. http://dx.doi.org/10.1557/jmr.2004.19.3.834.

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The influence of uniaxial prestress on dielectric and piezoelectric performance was studied for soft lead zirconate titanate piezoceramics. High electric field induced polarization and longitudinal/transverse strain were measured at different compression preload levels of up to −400 MPa. The parameters evaluated included polarization/strain outputs, dielectric permittivity, piezoelectric constants, and dissipation energy as a function of the mechanical preload and electric-field strength. The results indicate a significant enhancement of the dielectric and piezoelectric performance within a certain prestress loading range. At much higher stress levels, the predominant mechanical depolarization effect makes the material exhibit hardly any piezoeffect. However, the enhanced performance achieved by a small stress preload is accompanied by an unfavorable increased hysteresis, and consequently, increased energy loss, which is attributed to a larger extrinsic contribution due to more non-180° domain switching induced by the combined electromechanical load.

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19

Pyatetska, O. "Damping of unisothermal axisymmetric bending vibrations of viscoelastic plates." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 4 (2018): 68–71. http://dx.doi.org/10.17721/1812-5409.2018/4.10.

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A problem on the forced monoharmonic axisymmetric bending vibrations and dissipative heating of circular viscoelastic plate with the piezoelectric sensors and actuators is considered. Viscoelastic behavior of passive (without piezoeffect) and piezoactive materials is described using the concept of complex moduli which depend on temperature. The nonlinear coupled problem of electrothermoviscoelasticity is solved by numerical methods. The influence of the boundary conditions and temperature of disspative heating on active damping of harmonic vibrations of thin viscoelastic plates with the simultaneous use of sensors and actuators is investigated. For modeling viscoelastic properties of passive and piezoelectric materials, linear models of integral type viscoelasticity are used, which are most effective for simulating the dissipative properties of materials in the linear region. If the material characteristics depend on temperature, investigation of the influence of temperature of dissipative heating is reduced to solution of complicated nonlinear systems of differential equations.

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20

Afonin, S. M. "Parametric block diagrams of nano- and microdisplacement multilayer piezoelectric transducer in longitudinal piezoeffect." Mechanics of Solids 49, no. 3 (May 2014): 342–48. http://dx.doi.org/10.3103/s0025654414030108.

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21

Rogacheva, Nelly. "PASSIVE VIBRATION SUPPRESSION OF STRUCTURES IN THE VICINITY OF NATURAL FREQUENCIES USING PIEZOEFFECT." International Journal for Computational Civil and Structural Engineering 15, no. 2 (June 24, 2019): 125–34. http://dx.doi.org/10.22337/2587-9618-2019-15-2-125-134.

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The proposed method of passive vibration suppression of structures is based on the use of the piezoelectric effect, which consists in the ability of the piezoelectric material to convert electrical energy into mechanical energy, and conversely. As it is known if the frequency of forced vibrations tends to the resonant frequency, all the desired quantities (forcers, moments, displacements and deformations) grow indefinitely. A new idea is that as we approach the resonant frequency, we change the electrical conditions on the electrodes of piezoelectric layers, thereby obtaining a different boundary value problem and a different spectrum of natural frequencies. Thus, we manage to get away from the resonant vibrations of the structure. Using the example of a laminated beam with elastic and piezoelectric layers the possibility of damping vibrations caused by mechanical load is studied. In this paper, a mathematically based model is used to solve the problem in question. The calculations are performed and the results are presented in the form of graphs. It is shown that forcers, moments, displacements and deformations of beam in the vicinity of the natural frequency can be significantly reduced by as a result of changes in the electrical conditions on the electrodes of the piezoelectric layers.

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22

Tolutis, R. "Electrical Piezoeffect in Semiconducting BiSb Alloys due to Anisotropy of Electron Mobility." physica status solidi (b) 185, no. 2 (October 1, 1994): 439–46. http://dx.doi.org/10.1002/pssb.2221850214.

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23

Afonin, S. M. "Parametric Structural Schemes of Piezoactuators for Nano-and Micrometric Movements at a Longitudinal Piezoeffect." MEHATRONIKA, AVTOMATIZACIA, UPRAVLENIE 18, no. 2 (February 8, 2017): 112–21. http://dx.doi.org/10.17587/mau.18.112-121.

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24

Bykhovski, A. D., B. L. Gelmont, and M. S. Shur. "Elastic strain relaxation and piezoeffect in GaN-AlN, GaN-AlGaN and GaN-InGaN superlattices." Journal of Applied Physics 81, no. 9 (May 1997): 6332–38. http://dx.doi.org/10.1063/1.364368.

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25

Shlyakhin, D. A. "Dynamic axisymmetric problem of the direct piezoeffect for a radially polarized anisotropic piezoceramic cylinder." Journal of Applied Mechanics and Technical Physics 51, no. 1 (January 2010): 130–36. http://dx.doi.org/10.1007/s10808-010-0020-3.

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26

Grinyaev, S. N., and A. N. Razzhuvalov. "Resonant electron tunneling in GaN/Ga1−x AlxN(0001) strained structures with spontaneous polarization and piezoeffect." Physics of the Solid State 43, no. 3 (March 2001): 549–55. http://dx.doi.org/10.1134/1.1356136.

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27

Afonin, S. M. "Block diagrams of a multilayer piezoelectric motor for nano- and microdisplacements based on the transverse piezoeffect." Journal of Computer and Systems Sciences International 54, no. 3 (May 2015): 424–39. http://dx.doi.org/10.1134/s1064230715020021.

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28

Rikmanis, Maris, Andrejs Berzinš, and Uldis Viesturs. "Excess turbulence as a cause of turbohypobiosis in cultivation of microorganisms." Open Life Sciences 2, no. 4 (December 1, 2007): 481–501. http://dx.doi.org/10.2478/s11535-007-0038-6.

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AbstractThe present review describes the influence of different types of mixing systems under excess turbulence conditions on microorganisms. Turbohypobiosis phenomena were described by applying a method for measurement of the kinetic energy of flow fluctuations based on the piezoeffect. It can be assumed that the shear stress effect (the state of turbohypobiosis) plays a role mainly when alternative mechanisms in cells cannot ensure a normal physiological state under stress conditions. Practically any system (inner construction of a bioreactor, culture and cultivation conditions, including mixing) requires its own optimisation to achieve the final goal, namely, the maximum product and/or biomass yields from substrate (YP/S or/and YX/S), respectively. Data on the biotechnological performance of cultivation as well as power input, kinetic energy (e) of flow fluctuations, air consumption rate, rotational speed, tip speed, etc. do not correlate directly if the mixing systems (impellers-baffles) are dissimilar. Even the widely used specific power consumption cannot be relied upon for scaling up the cultivation performance using dissimilar mixing systems. A biochemical explanation for substrate and product transport via cell walls, carbon pathways, energy generation and utilisation, etc. furnishes insight into cellular interactions with turbulence of different origin for different types of microorganisms (single cells, mycelia forming cells, etc.).

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29

Shlyakhin, D. A. "NON-STATIONARY AXISYMMETRIC PROBLEM OF INVERSE PIEZOEFFECT FOR CIRCULAR BIMORPHOUS PLATE OF STEPPED VARIABLE THICKNESS AND RIGIDITY." Vestnik of Samara University. Natural Science Series 19, no. 6 (June 2, 2017): 133–40. http://dx.doi.org/10.18287/2541-7525-2013-19-6-133-140.

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Non-stationary axisymmetric problem for a thin circular bimorphous plate under the action on the end surfaces of electric potential, which is an arbitrary function of time is viewed. On the basis of the theory of Tymoshenko by method of finite integral transformation a new closed solution for the viewed electricity and elastic system of stepped variable rigidity and thickness is built. The obtained calculated correlations allow to explore the frequency characteristics and stress-deformed state of bimorphous elements.

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30

Shepelevich, V. V., N. N. Egorov, P. P. Khomutovskiy, G. Von Bally, M. Weber, and A. A. Firsov. "Optimization of two-wave interaction efficiency in cubic photorefractive sillenite-type crystals with optical rotary power and piezoeffect in diffusion regime." Ferroelectrics 234, no. 1 (January 1999): 289–309. http://dx.doi.org/10.1080/00150199908225302.

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31

Bardzokas, D. I., and M. L. Filshtinsky. "Investigation of the direct and inverse piezoeffect in the dynamic problem of electroelasticity for an unbounded medium with a tunnel opening." Acta Mechanica 155, no. 1-2 (March 2002): 17–25. http://dx.doi.org/10.1007/bf01170837.

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32

Sizov, V. E., and M. V. Stepushkin. "The Role of Piezoeffect in Anomalous Dependence of the Conductivity of AlGaAs/GaAs Heterostructure with a Two-Dimensional Electron Gas on the Distance between Contacts." Technical Physics Letters 46, no. 1 (January 2020): 69–72. http://dx.doi.org/10.1134/s1063785020010290.

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33

"DYNAMIC AXISYMMETRIC PROBLEM OF A DIRECT PIEZOEFFECT FOR A ROUND BIMORPH PLATE." PNRPU Mechanics Bulletin, no. 1 (2017). http://dx.doi.org/10.15593/perm.mech/2017.1.10.

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