Piezoelectric effect does not contribute in thermal drilling of quartz bearing rocks

Three first-year ice ridges have been examined with respect to geometry and morphology in landfast ice of Shokal'skogo Strait (Severnaya Zemlya Archipelago) in May 2018. Two of the studied ice ridges were located on the edge of the ridged field and were part of it, because their keels extended for a long distance deep into this field. Ice ridges characteristics are discussed in the paper. These studies were conducted using hot water thermal drilling with computer recording of the penetration rate. Boreholes were drilled along the cross-section of the ridge crest at 0.25 m intervals. Cross-sectional profiles of ice ridges are illustrated. The maximal sail height varied from 2.9 up to 3.2 m, the maximal keel depth varied from 8.5 up to 9.6 m. The average keel depth to sail height ratio varied from 2.8 to 3.3, and the thickness of the consolidated layer was 2.5-3.5 m. The porosity of the non-consolidated part of the keel was about 23-27%. The distributions of porosity versus depth for all ice ridges are presented.

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Structural-parametric model of an electroelastic actuator for nanomechanics

10.36652/0042-4633-2020-8-3-11 ◽

2020 ◽

pp. 3-11

Author(s):

S.M. Afonin

Keyword(s):

Transfer Function ◽

Piezoelectric Actuator ◽

Transfer Functions ◽

Piezoelectric Effect ◽

Parametric Model ◽

Elastic Compliance ◽

Parametric Models ◽

Piezo Actuator ◽

Structural Scheme ◽

Model Transfer

Structural-parametric models, structural schemes are constructed and the transfer functions of electro-elastic actuators for nanomechanics are determined. The transfer functions of the piezoelectric actuator with the generalized piezoelectric effect are obtained. The changes in the elastic compliance and rigidity of the piezoactuator are determined taking into account the type of control. Keywords electro-elastic actuator, piezo actuator, structural-parametric model, transfer function, parametric structural scheme

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Piezoelectric Energy Harvesting Solutions: A Review

Sensors ◽

10.3390/s20123512 ◽

2020 ◽

Vol 20 (12) ◽

pp. 3512 ◽

Cited By ~ 12

Author(s):

Corina Covaci ◽

Aurel Gontean

Keyword(s):

Energy Harvesting ◽

Piezoelectric Effect ◽

Piezoelectric Transducers ◽

Piezoelectric Energy Harvesting ◽

Piezoelectric Energy ◽

Direct Piezoelectric Effect ◽

Harvesting Technique ◽

Different Shapes ◽

Piezoelectric Devices ◽

Review Current

The goal of this paper is to review current methods of energy harvesting, while focusing on piezoelectric energy harvesting. The piezoelectric energy harvesting technique is based on the materials’ property of generating an electric field when a mechanical force is applied. This phenomenon is known as the direct piezoelectric effect. Piezoelectric transducers can be of different shapes and materials, making them suitable for a multitude of applications. To optimize the use of piezoelectric devices in applications, a model is needed to observe the behavior in the time and frequency domain. In addition to different aspects of piezoelectric modeling, this paper also presents several circuits used to maximize the energy harvested.

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Assessment of the Piezoelectric Response of an Epoxy Resin/SbSINanowires Composite Filling FDM Printed Grid

Materials ◽

10.3390/ma13225281 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5281

Author(s):

Mateusz Kozioł ◽

Piotr Szperlich ◽

Bartłomiej Toroń ◽

Piotr Olesik ◽

Marcin Jesionek

Keyword(s):

Dynamic Stress ◽

Piezoelectric Effect ◽

Wide Spectrum ◽

Piezoelectric Response ◽

Monitoring Systems ◽

Grid Structure ◽

Voltage Signal ◽

Antimony Sulfoiodide ◽

Deposition Modeling ◽

Applied Design

This paper shows a piezoelectric response from an innovative sensor obtained by casting epoxy-SbSI (antimony sulfoiodide) nanowires nanocomposite to a grid structure printed using a fuse deposition modeling (FDM) method. The grid is shown to be a support structure for the nanocomposite. The applied design approach prospectively enables the formation of sensors with a wide spectrum of shapes and a wide applicability. The voltage signal obtained as a result of the piezoelectric effect reached 1.5V and 0.5V under a maximum static stress of 8.5 MPa and under a maximum dynamic stress of 22.3 kPa, respectively. These values are sufficient for potential application in sensor systems. The effect of a systematic increase in the voltage signal with subsequent cycles was also observed, which similarly allows the use of these sensors in monitoring systems for structures exposed to unfavorable cyclical loads. The obtained results also show that the piezoelectric signal improves with increase in strain rate.

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Piezoelectric property comparison of two-dimensional ZnO nanostructures for energy harvesting devices

RSC Advances ◽

10.1039/d0ra10371c ◽

2021 ◽

Vol 11 (6) ◽

pp. 3363-3370

Author(s):

Ang Yang ◽

Yu Qiu ◽

Dechao Yang ◽

Kehong Lin ◽

Shiying Guo

Keyword(s):

Energy Harvesting ◽

Piezoelectric Property ◽

Piezoelectric Effect ◽

Theoretical Studies ◽

Two Dimensional ◽

Zno Nanostructures ◽

Energy Harvesting Devices ◽

Experimental And Theoretical Studies

In this paper, experimental and theoretical studies of the piezoelectric effect of two-dimensional ZnO nanostructures, including straight nanosheets (SNSs) and curved nanosheets (CNSs) are conducted.

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