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Prediction of friction coefficient in dry-lubricated polyoxymethylene spur gear pairs
Mechanism and Machine Theory, 2019In this article, the authors have experimentally determined the friction coefficient in the polyoxymethylene gear pairs lubricated by a dry film lubricant. The obtained expression increases the precision of the frictional power loss calculation, which is
D. Miler +3 more
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The Journal of the Royal Aeronautical Society, 1949
SummaryA summary is presented of information collected on coefficients of friction (rolling and sliding) between rubber tyres and road or runway surfaces. Nearly all the data collected are from tests on automobile tyres and are limited to speeds of about 40 m.p.h.
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SummaryA summary is presented of information collected on coefficients of friction (rolling and sliding) between rubber tyres and road or runway surfaces. Nearly all the data collected are from tests on automobile tyres and are limited to speeds of about 40 m.p.h.
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Coefficient of Friction of Watermelon
Transactions of the ASAE, 1996The static and dynamic coefficients of friction for two watermelon cultivars against six different surfaces were measured at three sliding speeds and three normal forces. The sliding speed, measurement (harvest) date, and type of abrasive surface had a significant effect on both coefficients, except sliding speed did not affect the dynamic coefficient ...
null C. Puchalski, null G. H. Brusewitz
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Material specific nanoscratch ploughing friction coefficient
Tribology International, 2018In nanoscratch testing it is observed that the normal and tangential forces do not increase linearly. This behavior results in ploughing friction coefficients that vary with nanoindenter penetration depth.
Adam H. Carreon, P. Funkenbusch
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Impact of drilling fluids on friction coefficient of brittle gas shale
International Journal of Rock Mechanics And Mining Sciences, 2018The stability of the horizontal long section of a wellbore is the main restriction of efficient development of shale gas. The use of oil-based drilling fluids in the initial stage of Longmaxi shale gas exploration in the Southern Sichuan Basin, China ...
Xiaopeng Yan +5 more
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Moment of Inertia and Friction Torque Coefficient Identification in a Servo Drive System
IEEE transactions on industrial electronics (1982. Print), 2019This paper proposes a new method to identify the mechanical parameters of a servo drive system, such as the moment of inertia and friction torque coefficients.
Sungmin Kim
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The Coefficient of Friction of Rubber
Rubber Chemistry and Technology, 1935Abstract Coefficient of friction is defined as the ratio of the force of friction to the load producing it. The accepted laws of the coefficient of friction are: 1. It is independent of the area of the surface in contact. 2. It is independent of the load applied. 3. It is independent of the velocity, at low values. 4.
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The coefficient of friction of metals
Wear, 1964Abstract It is shown that the measured coefficient of friction of a number of metals is in reasonable agreement with values calculated using expressions based on simple theories.
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Coefficient of friction for a sphere
American Journal of Physics, 1984A ball that rolls on parallel tracks, whose width is less than the diameter of the ball, experiences both translational and rotational motions. The linear accelerations of the ball for cases of rolling and slipping are derived theoretically, and these accelerations have also been determined by performing experiments when the width and the angular ...
R. L. Chaplin, M. G. Miller
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The coefficients of friction and wear
Il Nuovo Cimento, 1958The combination of the Savage surface energy and the Bowden and Tabor junction formation mechanisms of production of frictional energy is suggested. The physical description of the experiments is sufficiently simplified and represented by a stable state which envelopes the whole field of friction.
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