Results 281 to 290 of about 818,671 (331)
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Japanese Journal of Applied Physics, 1969
Theoretical equations of rolling friction coefficient of metal by the rigid pendulum method were obtained as a function of dynamic mechanical properties of metal for the case of cylinder and sphere as follows, λ c =3k/2π(3/2)1/3tan δ(W/E 1(ω))1/3 r -2/3 ...
Kikuwo Minato +2 more
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Theoretical equations of rolling friction coefficient of metal by the rigid pendulum method were obtained as a function of dynamic mechanical properties of metal for the case of cylinder and sphere as follows, λ c =3k/2π(3/2)1/3tan δ(W/E 1(ω))1/3 r -2/3 ...
Kikuwo Minato +2 more
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Robotic System for Bone Drilling Using a Rolling Friction Mechanism
IEEE/ASME transactions on mechatronics, 2018Bone drilling procedures are frequently performed in various surgical fields using computed tomography. The robotic systems employed to perform such procedures can improve the targeting accuracy and reduce the radiation exposure to surgeons.
Seongbo Shim +4 more
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Wear characterization under sliding–rolling contact using friction-induced vibration features
Proceedings of the Institution of mechanical engineers. Part J, journal of engineering tribology, 2021Skidding in rolling bearings often causes unexpected surface wear and early failures. Although vibration monitoring is widely used for bearing fault diagnosis, it is much less developed for wear analysis.
Chang Xu, Bo Li, Tonghai Wu
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Physics Education, 2020
A ball that rolls without sliding on a horizontal surface slows down as a result of static friction. The magnitude of the friction force is calculated by considering the force needed to prevent the contact area slipping.
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A ball that rolls without sliding on a horizontal surface slows down as a result of static friction. The magnitude of the friction force is calculated by considering the force needed to prevent the contact area slipping.
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Rolling friction on a granular medium
Physical Review E, 2009We present experimental results for the rolling of spheres on a granular bed. We use two sets of glass and steel spheres with varying diameters and a high-speed camera to follow the motion of the spheres. Despite the complex phenomena occurring during the rolling, the results show a friction coefficient nearly independent of the velocity (0.45-0.5 for ...
Fabio Vittorio, De Blasio +1 more
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Soviet Powder Metallurgy and Metal Ceramics, 1982
Friction in the rolling of powders should be analyzed in conjunction with their compressibility. The mechanical component of the coefficient of friction (roll surface roughness) at the interface between a roll and a powder being densified (zone II) exerts the strongest influence on the gauge indicators of the compacted strip.
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Friction in the rolling of powders should be analyzed in conjunction with their compressibility. The mechanical component of the coefficient of friction (roll surface roughness) at the interface between a roll and a powder being densified (zone II) exerts the strongest influence on the gauge indicators of the compacted strip.
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Study of rolling friction — behaviour of the small displacement of starting rolling friction
Wear, 1983Abstract In this study the detailed behaviour of the starting rolling displacement at the contact of a flat steel surface with a steel roller is investigated. In addition, the behaviour of the hysteresis loop formed in the region of the starting rolling distance is experimentally examined by varying the hardness of the rolling contact surface and the
Tadayoshi Koizumi +3 more
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Theory of Rolling Friction for Spheres
Journal of Applied Physics, 1959A theory of rolling friction featuring the importance of elastic hysteresis losses is presented. A simple model of retarded elasticity is chosen to represent the physical properties of the material. A prediction resulting from the theory is that the coefficient of friction for a relatively hard sphere rolling on a softer base material should vary with ...
Flom, D. G., Bueche, A. M.
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Friction measurement in cold rolling
Journal of Materials Processing Technology, 2001Abstract In order to study friction in the roll bite in the laboratory, a work roll with embedded pins is used in cold rolling. Friction and pressure are studied under dry and lubricated conditions. Aluminum alloy is used in the experiments. The results confirm that the friction coefficient in the roll bite is not uniform.
Y.J. Liu +3 more
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