Results 1 to 10 of about 67,549 (156)

Spatial Transverse Vibration Simulation Model of Axially Moving Sucker Rod String under the Excitation of Curved Borehole [PDF]

open access: yesShock and Vibration, 2020
The mechanical model of transverse vibration of sucker rod string (SRS) in directional well is simplified to the transverse vibration model of longitudinal and transverse curved beam with initial bending under borehole constraints. In this paper, besides
Hongbo Wang, Shimin Dong
doaj   +2 more sources

The Dielectrophoretic Interactions of Curved Particles in a DC Electric Field [PDF]

open access: yesMicromachines
In practical dielectrophoretic cell interaction experiments, cells do not always exhibit circular or rod-like shapes, making the study of dielectrophoretic interactions among irregularly shaped particles of significant importance.
Zhiwei Huang   +3 more
doaj   +2 more sources

Micropolar curved rods. 2-D, high order, Timoshenko’s and Euler-Bernoulli models

open access: yesCurved and Layered Structures, 2017
New models for micropolar plane curved rods have been developed. 2-D theory is developed from general 2-D equations of linear micropolar elasticity using a special curvilinear system of coordinates related to the middle line of the rod and special ...
Zozulya V.V.
doaj   +2 more sources

Nonlocal theory of curved rods. 2-D, high order, Timoshenko’s and Euler-Bernoulli models

open access: yesCurved and Layered Structures, 2017
New models for plane curved rods based on linear nonlocal theory of elasticity have been developed. The 2-D theory is developed from general 2-D equations of linear nonlocal elasticity using a special curvilinear system of coordinates related to the ...
Zozulya V.V.
doaj   +2 more sources

Couple stress theory of curved rods. 2-D, high order, Timoshenko’s and Euler-Bernoulli models

open access: yesCurved and Layered Structures, 2017
New models for plane curved rods based on linear couple stress theory of elasticity have been developed.2-D theory is developed from general 2-D equations of linear couple stress elasticity using a special curvilinear system of coordinates related to the
Zozulya V.V.
doaj   +2 more sources

New Torsional Surface Elastic Waves in Cylindrical Metamaterial Waveguides for Sensing Applications [PDF]

open access: yesSensors
In this paper, we demonstrate that torsional surface elastic waves can propagate along the curved surface of a metamaterial elastic rod (cylinder) embedded in a conventional elastic medium.
Piotr Kiełczyński   +2 more
doaj   +2 more sources

Dynamic instability of vibrations of thin-wall composite curvorine viscoelastic tubes under the influence of pulse pressure [PDF]

open access: yesE3S Web of Conferences, 2020
In this paper the results of a study of the dynamic characteristics of thin-walled composite curved viscoelastic pipes under the influence of internal pulsating pressures is presented. The relationship between stress and strain is described by the Aviary
Mirsaidov Mirziyod   +2 more
doaj   +1 more source

Calculation of Backscattered Ultrasonic Waves Field from a ‎Copper-clad Steel Rod Immersing in Water and Effect of Clad ‎Corrosion and Interfacial Disbond between Clad and Rod Defects ‎on this Field using the Finite Element Method [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2023
Inspection and specificity of the intactness of multi-layer and small-size parts like copper-clad steel rod is a hard task and requires high accuracy. The intactness of these parts is crucial due to their importance.
Omid Noormohammadi Arani   +3 more
doaj   +1 more source

Improving the Efficiency of Curved Wells’ Operation by Means of Progressive Cavity Pumps

open access: yesEnergies, 2022
This paper proposes a solution to the problem of improving the reliability of the operation of progressive cavity pump units in deviated and directional wells. High dogleg severity significantly contributes to rod breakage; rods often break close to the “
Anatoliy Andreevich Isaev   +4 more
doaj   +1 more source

Design of an esophageal deflection device for use during atrial ablation procedures

open access: yesJournal of Materials Research and Technology, 2020
To prevent thermal damage of the esophagus during cardiac ablation surgery, a new device, named the esophageal deflection device (EDD), has been designed.
Karcher Morris   +2 more
doaj   +1 more source

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