Reduction of the sliding friction of metals by the application of longitudinal or transverse ultrasonic vibration

Kumar, Vıjaya; Hutchings, I.M.

doi:10.1016/j.triboint.2004.05.003

Cited by 201 publications

(73 citation statements)

References 11 publications

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“…Pohlman and Lehfeldt [6] found that longitudinal tangential vibrations exert a significantly greater influence on the friction force than the normal ones. Papers argued that [7][8][9][10] changes of the friction force vector under the influence of vibrations cyclic are the cause of the reduction of friction resistance. A variable vector of the relative sliding velocity resulted in the force being two components, one of which is parallel and the other of which is perpendicular to the direction of motion.…”

Section: Introductionmentioning

confidence: 99%

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Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model

Wang

Chen

Rui

et al. 2017

Shock and Vibration

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Drill string torsional and longitudinal oscillation can significantly reduce axial drag in horizontal drilling. An improved theoretical model for the analysis of the frictional force was proposed based on microscopic contact deformation theory and a bristle model. The established model, an improved dynamic friction model established for drill strings in a wellbore, was used to determine the relationship of friction force changes and the drill string torsional vibration. The model results were in good agreement with the experimental data, verifying the accuracy of the established model. The analysis of the influence of drilling mud properties indicated that there is an approximately linear relationship between the axial friction force and dynamic shear and viscosity. The influence of drill string torsional oscillation on the axial friction force is discussed. The results indicated that the drill string transverse velocity is a prerequisite for reducing axial friction. In addition, low amplitude of torsional vibration speed can significantly reduce axial friction. Then, increasing the amplitude of transverse vibration speed, the effect of axial reduction is not significant. In addition, by involving general field drilling parameters, this model can accurately describe the friction behavior and quantitatively predict the frictional resistance in horizontal drilling.

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Section: Introductionmentioning

confidence: 99%

“…Experimental investigations [7][8][9] attempted to analytically describe this phenomenon. Consistency between analytical and experimental results led to a qualitative fit rather than quantitative agreement [11].…”

Section: Introductionmentioning

confidence: 99%

Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model

Wang

Chen

Rui

et al. 2017

Shock and Vibration

View full text Add to dashboard Cite

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“…When the measurement of the spring force is carried out with no frictional vibration, the obtained value corresponds to the "inherent kinetic friction coefficient" defined by Eq. (13). Otherwise, the obtained value depends on the mechanical properties of the tribometer used in the test.…”

Section: Resultsmentioning

confidence: 99%

“…However, if they are caused by mechanical vibrations induced by friction, i.e., frictional vibration [3][4][5][6], the time-averaged spring force may not give the true value of the kinetic frictional force, except in the case of stick-slip in an undamped single-degree-of-freedom (SDOF) system with the Coulomb friction [3]. Many researchers have reported on the effect of externally applied oscillating forces on the friction coefficient [7][8][9][10][11][12][13][14][15][16][17][18][19], which indicates that even when the instrument-related uncertainty [1,2] is negligible, frictional vibrations generate some other errors in tribotesting, although the mechanisms of forced vibration and self-excited vibration are completely different.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Friction Coefficient Measured in Tribotesting: Influence of Frictional Vibration

2014

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Using a novel anti-vibration tribometer with a yaw angle misalignment, Kado et al. (Trans. Jpn. Soc. Mech. Eng. C79: 2635-2643, 2013 have recently shown experimentally that frictional vibration in tribotesting causes considerable error, e.g., a 35% underestimation of the kinetic friction coefficient for the sliding contact between a steel ball and a steel plate lubricated with glycerol. In this paper, it is shown that their experimental results can be numerically simulated based on a purely mechanical model, which confirms that their experiments were carried out properly and also that in conventional tribotesting, the "measured kinetic friction coefficient" (obtained from the time-averaged spring force) is not the "inherent kinetic friction coefficient" (determined by the inherent nature of materials in contact as a function of the relative velocity) but the "effective kinetic friction coefficient" (determined by the mean energy consumption rate as a function of the driving velocity). The effective kinetic friction coefficient depends on the mechanical properties of the tribometer used in the test, and it corresponds to the inherent kinetic friction coefficient when the measurement is carried out with no frictional vibration.

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“…As is well-known, ultrasonic vibration in different existing forms play specific roles in components. Unilateral vibration either in sliding direction or normal to sliding direction would reduce the coefficient of friction [5], thus the in-plane ultrasonic vibration is hardly devoted to the power transmission by using ultrasonic vibration [6]. Fundamentally, ultrasonic motors are driven through ultrasonic vibration and friction action [7].…”

Section: Introductionmentioning

confidence: 99%

Wear Characteristics of Metallic Counterparts under Elliptical-Locus Ultrasonic Vibration

Zhang

Wang

2016

Applied Sciences

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Wear behavior is influential to improve friction drive and wear lifespan of actuators or motors, which work at an elliptical locus vibration. Sliding wear tests of metallic friction pairs are conducted by a laboratory rig of ultrasonic vibration. Surfaces of the different metallic sliders are characterized using surface roughness, Abbott curves and fractal dimension. Results show that surface roughness is reduced to varying degrees in the metallic sliders due to ultrasonic polishing and/or micro-rolling effect. Variations in the fractal dimensions of contact surfaces are consistent with that of surface roughness. Wear traces demonstrate that plastic deformation and cracking are the primary failure modes. Where the driving tip on the slider is in intermittent contact followed by impact effects, ripples of 3~5 µm traces suggest the occurrence of fretting in duralumin sliders. Nodular cast iron showed a favorable performance during running of ultrasonic motor, exhibiting a stable output performance and durable wear life.

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Reduction of the sliding friction of metals by the application of longitudinal or transverse ultrasonic vibration

Cited by 201 publications

References 11 publications

Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model

Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model

Kinetic Friction Coefficient Measured in Tribotesting: Influence of Frictional Vibration

Wear Characteristics of Metallic Counterparts under Elliptical-Locus Ultrasonic Vibration

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