Results 211 to 220 of about 28,990 (256)
Some of the next articles are maybe not open access.
Thermal effects in static friction: Thermolubricity
Physical Review E, 2008We present a molecular dynamics analysis of the static friction between two thick slabs. The upper block is formed by N2 molecules and the lower block by Pb atoms. We study the effects of the temperature as well as the effects produced by the structure of the surface of the lower block on the static friction.
FRANCHINI, Anna +3 more
openaire +2 more sources
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
openaire +1 more source
Journal of Fluids Engineering, 1943
Abstract A new machine is described by means of which static friction between contacting surfaces separated by lubricating films of thickness approaching molecular dimensions can be measured with considerable precision. In a test run, a number of spot determinations of the static coefficient are made at closely spaced points over a short
openaire +1 more source
Abstract A new machine is described by means of which static friction between contacting surfaces separated by lubricating films of thickness approaching molecular dimensions can be measured with considerable precision. In a test run, a number of spot determinations of the static coefficient are made at closely spaced points over a short
openaire +1 more source
Static Friction and the Law of Rubber Friction
Rubber Chemistry and Technology, 1963Abstract a) The true static friction of vulcanized rubber is in practice immeasurably small (equal to zero, according to theory). b) The static friction as usually determined is an initial friction force. c) The initial friction force is equal to the sliding friction force in accelerated movement.
openaire +1 more source
Journal of the Franklin Institute, 1942
Abstract The factors concerned in friction are discussed, together with a review of the limitations of the various approaches heretofore used. A more satisfactory view of the basic cause of static friction is developed in relation to modern experimental knowledge by considering the pertinent factors in systems having ideal surfaces, then relating ...
Walter Claypoole, Donald B. Cook
openaire +1 more source
Abstract The factors concerned in friction are discussed, together with a review of the limitations of the various approaches heretofore used. A more satisfactory view of the basic cause of static friction is developed in relation to modern experimental knowledge by considering the pertinent factors in systems having ideal surfaces, then relating ...
Walter Claypoole, Donald B. Cook
openaire +1 more source
On the nature of the static friction, kinetic friction and creep
Wear, 2003Abstract In this paper, we discuss the nature of the static and kinetic friction, and of (thermally activated) creep. We focus on boundary lubrication at high confining pressure (∼1 GPa), as is typical for hard solids, where one or at most two layers of confined molecules separates the sliding surfaces.
B.N.J. Persson +5 more
openaire +1 more source
Adsorbed Layers and the Origin of Static Friction
Science, 1999Analytic results and experiments in ultrahigh vacuum indicate that the static friction between two clean crystalline surfaces should almost always vanish, yet macroscopic objects always exhibit static friction. A simple and general explanation for the prevalence of static friction is proposed. “Third bodies,” such as small hydrocarbon molecules, adsorb
, He, , Muser, , Robbins
openaire +2 more sources
Static and Sliding Friction in Feedback Systems
Journal of Applied Physics, 1953One of the most common nonlinearities encountered in servomechanisms design is the friction phenomenon in electromechanical systems. Conventional linear theory fails to predict its effect upon system performance. This paper extends familiar techniques to the treatment of friction nonlinearity in servosystems.
Tou, J., Schultheiß, P. M.
openaire +2 more sources
Textile Research Journal, 1953
The relation F = aR n between the frictional force and normal reaction is found to hold for fibers, and it is proposed to replace Amontons' law by this form. The friction index, n, is found to lie between 0.80 and unity.
openaire +1 more source
The relation F = aR n between the frictional force and normal reaction is found to hold for fibers, and it is proposed to replace Amontons' law by this form. The friction index, n, is found to lie between 0.80 and unity.
openaire +1 more source
2009
Objectives: Bodies in contact exert a force on each other. In the case of ideally smooth surfaces, this force acts perpendicularly to the contact plane. If the surfaces are rough, however, there may also be a tangential force component. Students will learn that this tangential component is a reaction force if the bodies adhere, and an active force if ...
Dietmar Gross +4 more
openaire +1 more source
Objectives: Bodies in contact exert a force on each other. In the case of ideally smooth surfaces, this force acts perpendicularly to the contact plane. If the surfaces are rough, however, there may also be a tangential force component. Students will learn that this tangential component is a reaction force if the bodies adhere, and an active force if ...
Dietmar Gross +4 more
openaire +1 more source