Results 251 to 260 of about 155,826 (284)
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Interstitial Water Enhances Sliding Friction
Langmuir, 2018This study examines how surfaces with different water contact angles (wettability) affect dry and underwater adhesion and friction. These studies were conducted by bringing a deformable hydrophobic poly(dimethylsiloxane) lens in contact with surfaces of gradient wettability.
Adrian P. Defante +4 more
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Sliding Friction with Polymer Brushes
Physical Review Letters, 2003Using high-resolution shear force measurements, we examine in detail the frictional drag between rubbing surfaces bearing end-tethered polymeric surfactants (brushes). The drag attains a maximum on initial motion, attributed to elastic stretching of the chains, which falls by a cascade of relaxations to a value characteristic of kinetic friction.
Rafael, Tadmor +3 more
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Forms of Static Friction, Sliding Friction and Rolling Friction
World Tribology Congress III, Volume 1, 2005Although, it seems that the concepts of static friction, sliding friction and rolling friction are common knowledges, their real sources are ironically not so clear. Inappropriate descriptions of them may have hampered the theoretical analyses and calculations of the frictions and deterred their applications in real world.
Y. Xu, K. L. Yung
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Superconductivity-Dependent Sliding Friction
Physical Review Letters, 1998We have employed a quartz crystal microbalance technique to measure the friction associated with sliding of solid nitrogen along a lead surface, above and below the lead's superconducting transition temperature. The friction is observed to drop abruptly at the transition as the substrate enters the superconducting state. The observation signifies a new
A. Dayo, W. Alnasrallah, J. Krim
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Resonance in Atomic-Scale Sliding Friction
Nano Letters, 2021Friction represents a major energy dissipation mode, yet the atomistic mechanism of how friction converts mechanical motion into heat remains elusive. It has been suggested that excess phonons are mainly excited at the washboard frequency, the fundamental frequency at which relative motion excites the interface atoms, and the subsequent thermalization ...
Zaoqi Duan +11 more
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Journal of Physics D: Applied Physics, 1980
The friction of copper on copper (a) freshly prepared, and (b) boundary-lubricated with a thin film of an organic polymer, low density polyethylene, has been studied. The results indicate that the organic polymer is not as good a lubricant as some fatty acids and that in the case of the 'freshly prepared' specimens, the friction results are only ...
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The friction of copper on copper (a) freshly prepared, and (b) boundary-lubricated with a thin film of an organic polymer, low density polyethylene, has been studied. The results indicate that the organic polymer is not as good a lubricant as some fatty acids and that in the case of the 'freshly prepared' specimens, the friction results are only ...
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Nature, 1975
WE report experiments demonstrating that it is possible to predict quantitatively the level of friction arising when a smooth rubber sphere slides on glass. Analysis of the sliding friction is based on a surface energy approach. Observations show that when a smooth rubber surface advances over glass by a continuous peel process (Schallamach waves) the ...
A. D. ROBERTS, S. A. JACKSON
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WE report experiments demonstrating that it is possible to predict quantitatively the level of friction arising when a smooth rubber sphere slides on glass. Analysis of the sliding friction is based on a surface energy approach. Observations show that when a smooth rubber surface advances over glass by a continuous peel process (Schallamach waves) the ...
A. D. ROBERTS, S. A. JACKSON
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Dynamics of Precursors to Frictional Sliding
Physical Review Letters, 2007We measure the spatial and temporal behavior of the true contact area A along a rough spatially extended interface between two blocks in frictional contact. Upon the application of shear the onset of motion is preceded by a discrete sequence of cracklike precursors, which are initiated at shear levels that are well below the threshold for static ...
S M, Rubinstein, G, Cohen, J, Fineberg
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1978
The object of this chapter is that the student shall be introduced to the nature of dry sliding friction and is able to appreciate the ejects of dry sliding friction.
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The object of this chapter is that the student shall be introduced to the nature of dry sliding friction and is able to appreciate the ejects of dry sliding friction.
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Wear, 1964
Abstract The sliding friction between copper specimens was measured under atmospheric conditions and loads of 0.1–20 g. With very clean surfaces, the coefficient of friction was 1.0–1.1 for the entire load range. With less clean surfaces, the coefficient of friction obtained was about 0.4.
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Abstract The sliding friction between copper specimens was measured under atmospheric conditions and loads of 0.1–20 g. With very clean surfaces, the coefficient of friction was 1.0–1.1 for the entire load range. With less clean surfaces, the coefficient of friction obtained was about 0.4.
openaire +1 more source