Journal articles: 'Rolling friction'

1

Ivanov, A. P. "Rolling Friction." Doklady Physics 64, no. 3 (March 2019): 129–33. http://dx.doi.org/10.1134/s1028335819030157.

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Ivanov, A. P. "On rolling friction." Доклады Академии наук 485, no. 3 (May 21, 2019): 295–99. http://dx.doi.org/10.31857/s0869-56524853295-299.

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The dependence of rolling friction on velocity for various contact conditions is discussed. The principal difference between rolling and other types of relative motion (sliding and spinning) is that the points of the body in contact with the support change over time. Due to deformations, there is a small contact area and, entering into contact, the body points have a normal velocity proportional to the diameter of this area. For describing the dependence of the friction coefficient on the angular velocity in the case of “pure” rolling, a linear dependence is proposed that admits a logical explanation and experimental verification. Under the combined motion, the rolling friction retains its properties, the sliding and spinning friction acquiring the properties of viscous friction.

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DeGaspari, John. "Rolling Stock." Mechanical Engineering 123, no. 02 (February 1, 2001): 59. http://dx.doi.org/10.1115/1.2001-feb-5.

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This article discusses features of a new friction management system, which is intended to boost efficiency on the railroad. Friction Management Services LLC of West Chicago, Illinois, has developed a friction management system, called TracGlide that consists of a synthetic polymer and computerized application equipment, installed on the locomotive at the front of the train. Unlike conventional lubrication schemes, the TracGlide system applies a friction modifier, not a lubricant, to the top of the rail. Although railroads usually avoid treating the tops of rails to avoid traction problems, the TracGlide polymer tends to increase the coefficient of friction when needed. The friction modifier is applied on both rails after the last axle of the last locomotive at the front of the train passes by. The application is computer controlled, based on factors such as the train’s weight, track curvature, speed, and temperature of the lubricant, which are constantly changing.

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Liang, Wei Ge, Zhen Shan Zhang, and Lan Luo. "Rolling Friction Performance Analysis of Swash-Plate Engine in Underwater Vehicle." Applied Mechanics and Materials 80-81 (July 2011): 855–59. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.855.

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Friction property plays an important role in the operating process of engine, the analysis and discuss about friction property can help to improve the operating performance of engine. Based on the basic structure of swash-plate engine, the sphere rolling friction model and the roller rolling friction model were established, and corresponding formulae of the rolling friction force and the rolling friction coefficient were deduced. Then as an application, we employed the exact parameters of a swash-plate engine to calculate the sphere rolling friction force, the sphere rolling friction coefficient, the roller rolling friction force and the roller rolling friction coefficient. According to comparison, we concluded that roller rolling friction force was far less than sphere rolling friction force, and roller rolling friction coefficient was far less than sphere rolling friction coefficient. Furthermore, we proposed two topics which would be our next study concerning engine friction property: friction-induced heat, and high temperature influence on friction property.

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Cross, Rod. "Origins of rolling friction." Physics Education 52, no. 5 (June 29, 2017): 055001. http://dx.doi.org/10.1088/1361-6552/aa77b4.

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Cross, Rod. "The rolling friction formula." Physics Education 55, no. 3 (February 10, 2020): 033003. http://dx.doi.org/10.1088/1361-6552/ab6afb.

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Desai, D. A. "What is rolling friction?" Resonance 9, no. 12 (December 2004): 52–54. http://dx.doi.org/10.1007/bf02834307.

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Fleck, N. A., K. L. Johnson, M. E. Mear, and L. C. Zhang. "Cold Rolling of Foil." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 206, no. 2 (May 1992): 119–31. http://dx.doi.org/10.1243/pime_proc_1992_206_064_02.

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A theory of cold rolling of thin gauge strip is presented which, within the idealizations of homogeneous deformation and a constant coefficient of Coulomb friction, rigorously models the elastic deformation of the rolls and the frictional traction at the interface. In contrast with classical theories (3) it is shown that, for gauges less than a critical value, plastic reduction takes place in two zones, at entry and exit, which are separated by a neutral zone in which the rolls are compressed fiat and there is no slip between the rolls and the strip. Roll load and torque are governed by five independent non-dimensional parameters which express the influence of gauge, reduction, friction and front and back tensions. Values of load and torque have been computed (for zero front and back tensions) for a wide range of thickness, reduction and friction and have been found to collapse approximately on to a single master curve.

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Trzepiecinski, Kubit, Slota, and Fejkiel. "An Experimental Study of the Frictional Properties of Steel Sheets Using the Drawbead Simulator Test." Materials 12, no. 24 (December 4, 2019): 4037. http://dx.doi.org/10.3390/ma12244037.

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This article presents the results of an experimental investigation of the frictional resistance arising in a drawbead during sheet metal forming. The frictional characterization of DC04 deep drawing quality steels commonly used in the automotive industry is carried out using a friction simulator. The effects of some parameters of the friction process on the value of the coefficient of friction have been considered in the experimental investigations. The friction tests have been conducted on different strip specimens, lubrication conditions, heights of drawbead and specimen orientations in relation to the sheet rolling direction. The results of drawbead simulator tests demonstrate the relationship that the value of the coefficient of friction of the test sheets without lubrication is higher than in the case of lubricated sheets. The lubricant reduces the coefficient of friction, but the effectiveness of its reduction depends on the drawbead height and lubrication conditions. Moreover, the effectiveness of the reduction of the coefficient of friction by the lubricant depends on the specimen orientation according to the sheet rolling direction. In the drawbead test, the specimens oriented along the rolling direction demonstrate a higher value of coefficient of friction when compared to the samples cut transverse to the rolling direction. The smaller the width of the specimen, the lower the coefficient of friction observed. The difference in the coefficient of friction for the extreme values of the widths of the specimens was about 0.03–0.05. The use of machine oil reduced the coefficient of friction by 0.02–0.03 over the whole range of drawbead heights. Heavy duty lubricant even reduced the frictional resistances by over 50% compared to dry friction conditions. The effectiveness of friction reduction by machine oil does not exceed 30%.

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Kuwajima, M., M. Koishi, and J. Sugimura. "Contact Analysis of Tire Tread Rubber on Flat Surface with Microscopic Roughness3." Tire Science and Technology 34, no. 4 (December 1, 2006): 237–55. http://dx.doi.org/10.2346/1.2346375.

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Abstract This paper describes experimental and analytical studies of the dependence of tire friction on the surface roughness of pavement. Abrasive papers were adopted as representative of the microscopic surface roughness of pavement surfaces. The rolling∕sliding friction of tire tread rubber against these abrasive papers were measured at low slip velocities. Experimental results indicated that rolling∕sliding frictional characteristics depended on the surface roughness. In order to examine the interfacial phenomena between rubber and the abrasive papers, real contact length, partial slip, and apparent friction coefficient under vertical load and tangential force were analyzed with two-dimensional explicit finite element analysis in which slip-velocity-dependent frictional coefficients were considered. Finite element method results indicated that the sum of real contact area and local partial slip were larger for finer surfaces under the same normal and tangential forces. In addition, the velocity-dependent friction enhanced local slip, where the dependence of local slip on surface roughness was pronounced. It proved that rolling∕sliding friction at low slip ratio was affected by local frictional behavior at microslip regions at asperity contacts.

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Jiao, Zhi Jie, Chun Yu He, Jian Ping Li, and Xiang Hua Liu. "Study of Rolling Force Calculation Models for Cold Rolling Process." Advanced Materials Research 154-155 (October 2010): 882–85. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.882.

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For cold rolling process, the theoretical Bland-Ford-Hill model and Hitchcock model are used for the rolling force and roll flatten radius calculation. Friction coefficient and deformation resistance are calculated with empirical regression models. From rolling force model, the recalculation model for the friction coefficient and deformation resistance can be derived. After rolling, with actual measured data, friction coefficient and deformation resistance can be recalculated, and model parameter can be got by regression method. The practical application verifies that the accuracy of rolling force calculation model is good.

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Wang, Jian Xi, Wei Xiao, and Xiao Dong Zhang. "Effect of Wheel/Rail Friction on Rolling Contact Fatigue." Advanced Materials Research 160-162 (November 2010): 1636–40. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1636.

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A numerical model is presented to analyze effect of wheel/rail friction on rolling contact fatigue. A three-dimension finite element model of rail is built up to investigate the rail stresses and strain around wheel/rail patch. Then, based on the critical plane concept, a new model was proposed to predict the rolling contact fatigue (RCF) crack initiation life under different wheel/rail frictions by using stress and strain on the critical plane as fatigue parameter. The numerical results obtained show that the wheel/rail friction coefficient has a great impact on the fatigue crack initiation life.and the curve of fatigue crack initiation life under different wheel/rail friction coefficient is roughly "S" type. The results are very useful in the wheel/rail friction management and determining grinding interval and grinding removal.

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Fastykovskii, A. R., V. I. Bazaikin, and V. V. Evstifeev. "PROSPECTS FOR USE OF THE RESERVE FORCES OF FRICTION ON CONTACT SURFACE IN DEFORMATION ZONE AT ROLLING TO INCREASE PROCESS EFFICIENCY." Izvestiya. Ferrous Metallurgy 62, no. 10 (November 3, 2019): 810–15. http://dx.doi.org/10.17073/0368-0797-2019-10-810-815.

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Rolling process is carried out due to power supplied to the center of deformation using contact friction forces. Rolling takes place in two stages – the capture stage and the steady-state process. The capture stage determines possibility of deformation in rolls. During this period, retracting forces of friction are used with maximum efficiency. The main stage of rolling is the steady-state stage of the process, where contact friction capabilities are not fully used and reserve of friction forces is created, which can increase efficiency of rolling process. To balance excessive friction forces on contact surface in deformation zone during the steady-state process, zones of advance and adhesion appear. Their length characterize amount of excessive friction forces. Theoretical dependences for determining slip and adhesion zones are given taking into account variety of rolling factors. Estimation indicator of abilities of friction forces reserve at the steady-state stage is offered as well as dependence for its definition. It is analytically established that in steady-state stage of rolling on smooth rolls with ratio α/μз = 1 it is possible to supply 1.7 – 2 times greater energy due to exis ting reserve of friction force than at the stage of capture at a lower ratio α/μз ; these numbers are even higher for rolling on grooved rolls. Dependence which determines amount of additional power provided by friction forces reserve is given. Promising directions of using friction forces reserve at the steady- state stage of rolling are provided to improve its efficiency. On the example of rolling in drive – non-drive stand, an increase in efficiency (Efficiency Ratio) of the main line of rolling mill is established with more efficient use of friction forces at the steady-state stage of rolling process. Theoretical dependences are given to determine Efficiency Ratio at usual rolling process and at more full use of friction forces reserve.

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Pawelski, Hartmut. "Friction inhomogeneities in cold rolling." Journal of Materials Processing Technology 125-126 (September 2002): 392–97. http://dx.doi.org/10.1016/s0924-0136(02)00350-3.

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Liu, Y. J., A. K. Tieu, D. D. Wang, and W. Y. D. Yuen. "Friction measurement in cold rolling." Journal of Materials Processing Technology 111, no. 1-3 (April 2001): 142–45. http://dx.doi.org/10.1016/s0924-0136(01)00541-6.

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16

Du, Feng-shan, Gui-guo Wang, Xin-liang Zang, and Xue-tong Li. "Friction Model for Strip Rolling." Journal of Iron and Steel Research International 17, no. 7 (July 2010): 19–23. http://dx.doi.org/10.1016/s1006-706x(10)60150-1.

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17

Cross, Rod. "Coulomb's law for rolling friction." American Journal of Physics 84, no. 3 (March 2016): 221–30. http://dx.doi.org/10.1119/1.4938149.

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18

Krijt, S., C. Dominik, and A. G. G. M. Tielens. "Rolling friction of adhesive microspheres." Journal of Physics D: Applied Physics 47, no. 17 (April 10, 2014): 175302. http://dx.doi.org/10.1088/0022-3727/47/17/175302.

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19

Molotilov, B. V. "Extreme conditions of rolling friction." Steel in Translation 37, no. 4 (April 2007): 398–404. http://dx.doi.org/10.3103/s0967091207040195.

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20

Gohar, R. "Low friction rolling element bearings." Wear 104, no. 4 (August 1985): 309–22. http://dx.doi.org/10.1016/0043-1648(85)90039-0.

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21

Tieu, A. Kiet, Hong Tao Zhu, Cheng Lu, C. You, Zheng Yi Jiang, and Giovanni D'Alessio. "Modelling of Friction Coefficient in Cold Strip Rolling." Materials Science Forum 505-507 (January 2006): 1285–90. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1285.

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The variation of the friction in the roll bite is of great importance in cold strip rolling. The main interest of the paper is to model the friction coefficient in the roll bite during cold rolling. The deformation resistance of the rolled products and friction coefficient in the roll bite were determined simultaneously by minimizing the error of the measured and calculated rolling forces based on nonlinear least squares optimization algorithm. The neural network was introduced to further improve the accuracy of friction coefficient calculation in cold strip rolling. The results already obtained shows that friction decreases with roll wear, and the lower the rolling speed, the higher is the friction.

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Fan, Xiao Bin, Hui Gang Wang, and Yong Zang. "Research of Rolling Mill Friction Quivering Properties Based on the Rolling Interface." Applied Mechanics and Materials 42 (November 2010): 95–99. http://dx.doi.org/10.4028/www.scientific.net/amm.42.95.

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In order to find the vibration source of a rolling mill, the dynamical characteristic of friction of the rolling interface was analyzed. Characteristic between friction coefficient and rolling speed has been gotten based on test. It is shown the friction or friction coefficient of rolling interface declined sharply with the rolling speed variety in some time. By the comparison test on the spot, it is shown that closing emulsion is conducive to vibration suppression. A lateral friction roller flutter model was established. According to the model numerical analysis, it is shown that when the external disturbance forces being smaller the system showed an almost periodic motion, while a chaotic ones when the external disturbance forces being bigger. Moreover, with the change in external disturbance force roll amplitude bifurcation was occurred. That is to say, reducing the rate and frequency of exciting force will improve the stability of the system dynamics.

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Rawat, Aruna, Naseef Ummer, and Vasant Matsagar. "Performance of bi-directional elliptical rolling rods for base isolation of buildings under near-fault earthquakes." Advances in Structural Engineering 21, no. 5 (August 25, 2017): 675–93. http://dx.doi.org/10.1177/1369433217726896.

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Rolling base isolation system provides effective isolation to the structures from seismic base excitations by virtue of its low frictional resistance. Herein, dynamic analysis of flexible-shear type multi-storey building mounted on orthogonally placed elliptical rolling rod base isolation systems subjected to bi-directional components of near-fault earthquake ground motions is presented. The orthogonally placed rods would make it possible to resist the earthquake forces induced in the structure in both the horizontal directions. The curved surface of these elliptical rods has a self-restoring capability due to which the magnitude of peak isolator displacement and residual displacement is reduced. The roughness of the tempered curved surface of the rollers dissipates energy in motion due to frictional damping. The seismic performance of the multi-storey building mounted on the elliptical rolling rod base isolation system is compared with that mounted on the sliding pure-friction and cylindrical rolling rod systems. Parametric studies are conducted to examine the behavior of the building for different superstructure flexibilities, eccentricities of the elliptical rod, and coefficients of friction. It is concluded that the elliptical rolling rod base isolation system is effective in mitigation of damaging effects of the near-fault earthquake ground motions in the multi-storey buildings. Even under the near-fault earthquake ground motions, the base-isolated building mounted on the elliptical rolling rods shows considerable reduction in seismic response. The isolator displacement with the elliptical rolling rod base isolation system is less in comparison to the pure-friction and cylindrical rolling rod systems.

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Chua, J. J. C., F. K. Fuss, and A. Subic. "Non-linear rolling friction of a tyre-caster system: analysis of a rugby wheelchair." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 4 (April 2011): 1015–20. http://dx.doi.org/10.1243/09544062jmes2485.

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Tyre-caster systems such as wheelchairs consist of several components with different bearing and rolling friction, with the latter depending on the tyre pressure. The aim of this study was to determine the rolling friction of a rugby wheelchair with deflated and maximally inflated tyres. The rolling friction was determined with coast-down tests by instrumenting the wheelchair with an accelerometer. As the energy loss of coasting down comes primarily from the rolling friction and aerodynamic drag, the latter (including the lift) was determined using wind tunnel experiments. The ratio of the sum of horizontal forces (drag and inertial) to the sum of vertical forces (lift and gravitational) determined the rolling friction coefficient. The rolling friction coefficient expressed as a function of the velocity was found to be highly non-linear, consisting of an initial viscous spike at low velocities, a constant component, and a parabolic component increasing with velocity. The rolling friction coefficient of the wheelchair with deflated tyres was on average three times higher than the one with maximally inflated tyres.

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De Moerlooze, Kris, and Farid Al-Bender. "Experimental Investigation into the Tractive Prerolling Behavior of Balls in V-Grooved Tracks." Advances in Tribology 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/561280.

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In a rolling element system, the period of transition between motion commencement and the attainment of steady state, gross rolling, and termed prerolling is of common concern to many engineering applications. This region is marked by hysteresis friction behavior, with a characteristic friction-displacement curve, which is in particular relevant to motion characterization and control issues. In a previous paper, the authors carried out a theoretical analysis of tractive prerolling, leading to a model for simulating this phenomenon. The present paper is dedicated to the experimental investigation of tractive prerolling friction behavior, including validation of the theoretical model. Firstly, a kinematic analysis of the rolling motion in V-grooved tracks is carried out. Secondly, the influence of the normal load on the frictional behavior, in prerolling up to the attainment of gross rolling, is investigated on a dedicated test setup. Finally, the newly developed theoretical model is validated by comparison with the experimental results. Satisfactory agreement is obtained between theory and experiment.

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Ateshian, G. A., and H. Wang. "Rolling resistance of articular cartilage due to interstitial fluid flow." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 211, no. 5 (May 1, 1997): 419–24. http://dx.doi.org/10.1243/0954411971534548.

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A mechanism which may contribute to the frictional coefficient of diarthrodial joints is the rolling resistance due to hysteretic energy loss of viscoelastic cartilage resulting from interstitial fluid flow. The hypothesis of this study is that rolling resistance contributes significantly to the measured friction coefficient of articular cartilage. Due to the difficulty of testing this hypothesis experimentally, theoretical predictions of the rolling resistance are obtained using the solution for rolling contact of biphasic cylindrical cartilage layers [Ateshian and Wang (1)]. Over a range of rolling velocities, tissue properties and dimensions, it is found that the coefficient of rolling resistance μR varies in magnitude from 10−6 to 10−2; thus, it is generally negligible in comparison with experimental measurements of the cartilage friction coefficient (10−3-10−1) except, possibly, when the tissue is arthritic. Hence, the hypothesis of this study is rejected on the basis of these results.

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Alaci, S., F. C. Ciornei, I. C. Romanu, and M. C. Ciornei. "Upon the relationship between rolling friction and sliding friction." IOP Conference Series: Materials Science and Engineering 400 (September 18, 2018): 042002. http://dx.doi.org/10.1088/1757-899x/400/4/042002.

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Xia, Xin Tao, Long Chen, and Fan Nian Meng. "Information Entropy of Rolling Bearing Friction Torque as Data Series." Applied Mechanics and Materials 44-47 (December 2010): 1115–19. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1115.

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The information entropy theory is applied to evaluate the uncertainty of the rolling bearing friction torque. The data series are obtained via the experimental investigation on the friction torque of the rolling bearings under the condition of different rotational speeds. And the result shows that the information entropy of the friction torque increases with the rotational speed of the rolling bearing, revealing the new dynamic performance of the rolling bearing friction torque as a data series.

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Kajiyama, Yuji, and Koki Higuchi. "Motion of a Rolling Hula Hoop." Physics Educator 03, no. 01 (March 2021): 2150002. http://dx.doi.org/10.1142/s2661339521500025.

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If one rolls a vertically standing hula hoop forward with backspin applied, it moves once far away and then eventually back to hand. In this paper, we study such a motion of a rolling hula hoop from both theoretical and experimental aspects. The hula hoop is rolling with slipping immediately after it leaves the hand, and its motion will transit to that of without slipping due to the transition of the frictional force from kinetic friction to static friction. We show that the experimental results analyzed by Tracker software can be well described by equations of motion that take into account the deformation of the hula hoop. Theoretical and experimental studies in this paper are suitable for university students in physics courses. The video analyzed in this paper can be viewed at https://youtu.be/i4j1lDhCI2os .

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Yang, D. Y., and J. S. Ryoo. "An Investigation into the Relationship between Torque and Load in Ring Rolling." Journal of Engineering for Industry 109, no. 3 (August 1, 1987): 190–96. http://dx.doi.org/10.1115/1.3187117.

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In the ring-rolling process most of the required forming energy is transferred from the roll into the deforming region by the aid of friction between the roll surface and the ring. In this paper a concept of “equivalent” coefficient of friction (μeq) is proposed, which is the ratio of frictional force of the driven roll to pressing load of the pressure roll. Considering the ring geometry and the related kinematics, the relationship between equivalent coefficient of friction and process parameters is derived. The upper-bound torque is also found based on the geometrical simplifications, and the roll of μeq for the upper-bound solution is investigated. The effects of various process parameters on equivalent coefficient of friction in ring rolling are then discussed.

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Yang, H. P., Yu Hui Sha, Fang Zhang, Wei Pei, and Liang Zuo. "Through-Thickness Shear Strain in Silicon Steel under Asymmetric Rolling." Materials Science Forum 702-703 (December 2011): 762–65. http://dx.doi.org/10.4028/www.scientific.net/msf.702-703.762.

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Through-thickness shear strain variation with speed/radius/friction ratio in cold rolled silicon steel under different asymmetric rolling modes was analyzed by finite element method (FEM). Cold rolling textures were also investigated quantitatively to correlate with the calculated shear strain. With increasing speed/radius/friction ratio, shear strain distribution under differential-speed and differential-radius rolling exhibits similar characteristic in contrast to differential-friction rolling. Unidirectional shear strain develops through sheet thickness when asymmetric speed and radius ratio exceeds 1.125, whereas it does not appear even at friction ratio of 1.5. Shear strain distribution dependent on asymmetric rolling modes can be well understood by forward and backward slip zones as well as roll pressure as a function of speed/radius/friction ratio.

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Wei, Dong Bin, Jun Xia Huang, Ai Wen Zhang, Zheng Yi Jiang, A. Kiet Tieu, Fei Wu, Xu Shi, and Si Hai Jiao. "Experimental Study on the Deformation of Oxide Scale and Friction during Hot Rolling of Stainless Steel 304L." Advanced Materials Research 97-101 (March 2010): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.412.

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Contact friction is of crucial importance for the accurate modelling, optimum design and control of industrial rolling processes. Hot rolling tests were carried out to investigate the deformation of oxide scale and friction during hot rolling of stainless steel 304L. The morphology of oxide scale layer and the surface roughness transfer under the conditions of hot rolling were obtained. The friction condition at the roll-strip interface was determined.

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Xia, Xin Tao, Long Chen, and Fan Nian Meng. "Uncertainty of Rolling Bearing Friction Torque as Data Series Using Grey Bootstrap Method." Applied Mechanics and Materials 44-47 (December 2010): 1125–29. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1125.

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Based on the information poor system theory, the grey bootstrap method is employed to estimate the uncertainty of the rolling bearing friction torque. The data series are obtained via the experimental investigation of the friction torque of the rolling bearings under the condition of different rotational speeds. And the results show that the mean of the dynamic fluctuant range (MDFR) of the friction torque increases with the rotational speed of the rolling bearing, revealing the new dynamic performance of the rolling bearing friction torque as a data series.

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Xia, Xin Tao, Tao Mei Lv, and Fan Nian Meng. "Chaotic Characteristic and Nonlinear Dynamic Performance of Rolling Bearing Friction Torque." Applied Mechanics and Materials 26-28 (June 2010): 88–92. http://dx.doi.org/10.4028/www.scientific.net/amm.26-28.88.

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Based on the chaotic theory, the methods of the Lyapunov exponent and the box dimension were applied to evaluate the chaotic characteristic and the nonlinear dynamic performance of the rolling bearing friction torque. The time series were obtained via the experimental investigation on the friction torque of the rolling bearings under the condition of different rotational speeds. It is found that the rolling bearing friction torque is of a chaotic system because the maximum of Lyapunov exponents of its time series is greater than zero according to the chaotic theory. And the result shows that the mean of the box dimension of the friction torque increases with the rotational speed of the rolling bearing, revealing the new dynamic performance of the rolling bearing friction torque as a time series.

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KOIZUMI, Tadayoshi, and Katsuhira TAUE. "Vibration Characteristics for Rolling Friction System with Starting Rolling Displacement." Transactions of the Japan Society of Mechanical Engineers Series C 72, no. 722 (2006): 3207–12. http://dx.doi.org/10.1299/kikaic.72.3207.

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Janová, Jitka, and Jana Musilová. "Coupled rolling motion: considering rolling friction in non-holonomic mechanics." European Journal of Physics 32, no. 1 (December 20, 2010): 245–57. http://dx.doi.org/10.1088/0143-0807/32/1/023.

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Baisukhan, Adirek, and Wasawat Nakkiew. "Influence of Deep Rolling Process Parameters on Surface Residual Stress of AA7075-T651 Aluminum Alloy Friction Stir Welded Joint." Materials Science Forum 939 (November 2018): 23–30. http://dx.doi.org/10.4028/www.scientific.net/msf.939.23.

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Friction stir welding is most commonly used for joining aluminum alloy parts. After welding, residual stresses occurred in the welded joint caused by non-uniform cooling rate. Friction stir welding usually generates tensile residual stress inside the workpiece which affects the strength in addition to the fatigue life of materials. Compressive residual stress usually is beneficial and it can be introduced by mechanical surface treatment methods such as deep rolling, shot peening, laser shock peening, etc. In this research, deep rolling was used for inducing compressive residual stress on surface of friction stir welded joint. The residual stresses values were obtained from X-ray diffraction machine. Influence of three deep rolling process parameters: rolling pressure, rolling speed and rolling offset on surface residual stresses at the welded joint were investigated. Each factor had 2 levels (23 full factorial design). The statistical analysis result showed that the rolling pressure, rolling speed, rolling offset, interaction between rolling pressure and rolling speed, interaction between rolling speed and rolling offset were statistically significant factors, with the most compressive residual stress value approximately -391.6 MPa. The appropriated deep rolling process parameters on surface residual stress of AA7075-T651 aluminum alloy friction stir welded joint were 1) rolling pressure about 150 bar 2) rolling speed about 1,400 mm/min 3) rolling offset about 0.1 mm.

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Tong, Bao Hong, Xin Ming Cheng, and Xiao Qian Sun. "Study on Dynamic Contact Nature of Cylinder-Plane Friction Couple in the Condition of Rolling-Sliding." Applied Mechanics and Materials 271-272 (December 2012): 1142–46. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1142.

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High stress is caused by sliding in the process of the line-contact has a great influence on its service life. Through establishing a finite element 3D model of the cylinder-plane friction couple for dynamic contact, ANSYS/LS-DYNA is used to analyze the friction pair’s stress in the condition of rolling-sliding. The stress state of the friction is compared in the condition of five different slide-roll ratios by numerical simulation. The results show that the friction’s stress in the dynamic condition of rolling-sliding is rather bigger than in the static condition. Comparing the average value and the maximum value of the von mises and shear stresses in five different slid-roll ratios situations, it can be found that the values of max and average both first increased then decreased with increasing of the slide-roll ratio and the maximum values both appeared at the slide-roll ratio of 0.1. Methods and conclusions can provide some references for the research of the line friction pair’s dynamic contacting nature in the condition of rolling-sliding and the prediction of the friction pair’s service life.

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Yang, Li Cheng, Shang Le Qing, Xuan Huang, and Yi Ping Luo. "Numerical Analysis of Friction Distribution in the Rod Rolling Process." Applied Mechanics and Materials 34-35 (October 2010): 893–97. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.893.

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The three dimensional finite element models of rod have been built on the basis of thermo-mechanical coupled elastic-plastic FEM in order that the rolling process of No.5 pass is simulated accurately. The distributed rule of friction is calculated and discussed with variable initial rolling temperature, diameters of rollers, reduction in pass and rolling speeds. The results show that the fore sliding region, adhesive region and back sliding region are existent on the surface of rolling material. Furthermore, friction force is calculated by using numerical simulation method and it is a new approach in studying friction. The analysis of friction force is available for reference to optimize processing parameters in the rolling process.

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Song, Chenfei, Zili Liu, Xinbin Hou, Li Wang, and Yongzhen Zhang. "Capacity evaluation on Cu rolling tribological/electric contact pairs under various contact load and applied voltage." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 10 (January 29, 2019): 1407–14. http://dx.doi.org/10.1177/1350650119826424.

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The electric/tribological behaviors of Cu rolling pairs were studied under various contact load and applied voltage. The real-time data of friction coefficient and current were obtained synchronously, and their variation was analyzed. Under high contact load and high voltage, the degradation of electric/tribological contact could be expressed as the growth of friction coefficient and the aggravation of frictional/electrical fluctuation. The applied voltage played an important role in morphology change and surface oxidation. Low roughness surface and adhesion were observed on electric rolling surface mainly because of the Joule heating and the adhesion could induce the growth of high friction coefficient. Meanwhile, due to the tribo-oxidation and anodic oxidation, obvious but uneven O distribution was detected on the same surface and could disturb tribological/electric contact. The results may be beneficial for understanding the fundamental behaviors of novel rolling conducting rotary joint.

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Korolev, A. V., and A. A. Korolev. "Friction machine for accelerated wear tests of frictional rolling elements." Journal of Friction and Wear 38, no. 1 (January 2017): 77–81. http://dx.doi.org/10.3103/s1068366617010068.

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Ren, Hong Bin, A. Kiet Tieu, Cheng Lu, and Giovanni D'Alessio. "A 3D Slab Method in Cold Strip Rolling." Materials Science Forum 505-507 (January 2006): 1279–84. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1279.

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In this paper, a 3D slab method model has been developed. Two differential equations governing the longitudinal and transverse force equilibriums coupled with the Von Mises yield criterion have been solved to obtain the rolling pressure distribution. The strip speed is calculated according to the volume constancy. The Coulomb friction law with different frictional coefficient and speeds were applied to the longitudinal and transverse direction. Coupled with the roll stack deformation model and thermal model, the developed 3D slab method model was used to predict the strip profile and edge drop. The effects of bending force, reduction and transverse friction on the strip profile and edge drop have been discussed in this paper. The calculated result predicted by the 3D slab method is in very good agreement with measured results. The results have shown that the large bending force, small reduction and small friction will improve the strip profile and reduce the edge drop.

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Lenard, John G. "Friction During Flat Rolling of Metals." International Journal of Forming Processes 4, no. 1-2 (June 30, 2001): 23–41. http://dx.doi.org/10.3166/ijfp.4.23-41.

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Jiang, Zheng Yi, A. Kiet Tieu, and Xiao Ming Zhang. "Friction Consideration in Sheet Metal Rolling." Key Engineering Materials 274-276 (October 2004): 505–10. http://dx.doi.org/10.4028/www.scientific.net/kem.274-276.505.

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AMINO, Naoya. "Friction and Rolling Resistance of Tires." NIPPON GOMU KYOKAISHI 88, no. 2 (2015): 37–42. http://dx.doi.org/10.2324/gomu.88.37.

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Olaru, Dumitru N., Ciprian Stamate, Alina Dumitrascu, and Gheorghe Prisacaru. "New micro tribometer for rolling friction." Wear 271, no. 5-6 (June 2011): 842–52. http://dx.doi.org/10.1016/j.wear.2011.03.007.

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Chua, Julian J. C., Franz Konstantin Fuss, and Aleksandar Subic. "Rolling friction of a rugby wheelchair." Procedia Engineering 2, no. 2 (June 2010): 3071–76. http://dx.doi.org/10.1016/j.proeng.2010.04.113.

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Minkin, Leonid, and Daniel Sikes. "Coefficient of rolling friction - Lab experiment." American Journal of Physics 86, no. 1 (January 2018): 77–78. http://dx.doi.org/10.1119/1.5011957.

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Lam, L., and E. Lowy. "Static friction of a rolling wheel." Physics Teacher 25, no. 8 (November 1987): 504. http://dx.doi.org/10.1119/1.2342349.

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Ghodssi, R., D. D. Denton, A. A. Seireg, and B. Howland. "Rolling friction in a linear microactuator." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 11, no. 4 (July 1993): 803–7. http://dx.doi.org/10.1116/1.578308.

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Journal articles on the topic 'Rolling friction'

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