Results 291 to 300 of about 285,969 (330)
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Textile Research Journal, 1953
The relation F = aRn 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. The significance of this relation is discussed in terms of the cohesion theory of friction.
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The relation F = aRn 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. The significance of this relation is discussed in terms of the cohesion theory of friction.
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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
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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
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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.
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British Journal of Applied Physics, 1955
It is shown that the static friction between a soft metal hemisphere and a flat surface increases with the length of time the surfaces have been in contact and that this increase is due to creep. Such creep might account for the difference between static and dynamic coefficients of friction.
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It is shown that the static friction between a soft metal hemisphere and a flat surface increases with the length of time the surfaces have been in contact and that this increase is due to creep. Such creep might account for the difference between static and dynamic coefficients of friction.
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Driven Colloidal Monolayers: Static and Dynamic Friction
2014Trapping and dragging colloidal monolayers in two-dimensional optical lattices is offering the possibility to mimic friction between crystals (or even quasicrystals) visualizing directly the intimate mechanisms of sliding friction, with the additional possibility to change parameters freely, and to compare directly experiment with theory.
A. Vanossi, N. Manini, E. Tosatti
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Toward Zero Static Friction at the Microscale
Physical Review LettersStatic friction, a ubiquitous physical phenomenon, plays a significant role in natural processes and industrial applications. Its influence is particularly notable in the field of controlled micromanipulation and precision manufacturing, where static friction often exceeds kinetic friction and leads to material damage and unpredictable behaviors.
Tengfei Li +8 more
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The static and dynamic friction of metals
Wear, 1972Abstract It is shown that the difference between the static and dynamic frictions of metals is caused by the difference between their static and dynamic hardnesses.
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