Results 251 to 260 of about 34,534 (295)
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2004
Among the class of polymer extrusion instabilities, collectively known asmelt fracture (1), the stick-slip instability is the only one that is associated with pressure and extrudate flow rate oscillations, observedwhile the throughput is controlled.
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Among the class of polymer extrusion instabilities, collectively known asmelt fracture (1), the stick-slip instability is the only one that is associated with pressure and extrudate flow rate oscillations, observedwhile the throughput is controlled.
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Tectonophysics, 1970
Abstract Physical mechanisms that have been proposed to explain the occurrence of stick-slip motion during frictional sliding have been examined in the light of results obtained from experiments with rocks and brittle minerals. An instability caused by sudden brittle fracture of locked regions on surfaces in contact is the most likely explanation for
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Abstract Physical mechanisms that have been proposed to explain the occurrence of stick-slip motion during frictional sliding have been examined in the light of results obtained from experiments with rocks and brittle minerals. An instability caused by sudden brittle fracture of locked regions on surfaces in contact is the most likely explanation for
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Stick slip, charge separation and decay
pure and applied geophysics, 1986Measurements of charge separation in rock during stable and unstable deformation give unexpectedly large decay times of 50 sec. Time-domain induced polarization experiments on wet and dry rocks give similar decay times and suggest that the same decay mechanisms operate in the induced polarization response as in the relaxation of charge generated by ...
D. A. Lockner +3 more
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Source Parameters for Stick-Slip and for Earthquakes
Science, 1973Source parameters of stick-slip friction events measured in the laboratory show particle and rupture propagation velocities which are similar to those observed for earthquakes and inferred from seismic source theory. This dynamic similarity strongly supports the idea that stick-slip is the mechanism for shallow earthquakes.
T, Johnson, F T, Wu, C H, Scholz
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Stick-slip Oscillations in Resonant Power Converters
2005 IEEE International Symposium on Circuits and Systems, 2005The paper presents evidence of the existence of stick-slip oscillations, usually found in mechanical systems with friction, in a class of resonant power converters. It is shown that these converters can exhibit periodic solutions characterized by segments of sliding motion (associated to theoretically infinitely many switchings).
DI BERNARDO, MARIO, E. Fossas
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Tribotest, 1997
AbstractBecause of the interaction of the large number of parameters influencing stick‐slip, it is very difficult to perform repeatable and reproducible tests that define the anti‐stick‐slip properties of lubricants. In order better to understand the difficulties encountered in stick‐slip testing, an overview of the influencing parameters, with a ...
F. Van de Velde +2 more
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AbstractBecause of the interaction of the large number of parameters influencing stick‐slip, it is very difficult to perform repeatable and reproducible tests that define the anti‐stick‐slip properties of lubricants. In order better to understand the difficulties encountered in stick‐slip testing, an overview of the influencing parameters, with a ...
F. Van de Velde +2 more
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1991
When moving slowly machines are likely to exhibit stick-slip, a periodic cycle of alternating motion and arrest. Stick-slip determines the lower performance bounds of a machine, the lowest sustainable speed and the shortest governable motion. In applications that place a premium on precise motion, an understanding of the dynamics of stick-slip and its ...
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When moving slowly machines are likely to exhibit stick-slip, a periodic cycle of alternating motion and arrest. Stick-slip determines the lower performance bounds of a machine, the lowest sustainable speed and the shortest governable motion. In applications that place a premium on precise motion, an understanding of the dynamics of stick-slip and its ...
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Colloids and Surfaces, 1989
Abstract The dynamics of stick-slip jumps on heterogeneous surfaces is analysed with a simple experimental model system. The heterogeneity of the surface is controlled by the application of thin low-energy ink lines on a high-energy glass surface. The liquid spreads completely on the bare glass surface but has a finite contact angle on the ink.
J.G.E.M. Fraaije +3 more
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Abstract The dynamics of stick-slip jumps on heterogeneous surfaces is analysed with a simple experimental model system. The heterogeneity of the surface is controlled by the application of thin low-energy ink lines on a high-energy glass surface. The liquid spreads completely on the bare glass surface but has a finite contact angle on the ink.
J.G.E.M. Fraaije +3 more
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Complimentarity Problems of Stick-Slip Vibrations
14th Biennial Conference on Mechanical Vibration and Noise: Dynamics and Vibration of Time-Varying Systems and Structures, 1993Abstract Multibody systems with many friction contacts not being decoupled by some force laws afford a special treatment with respect to the uniqueness of the solution after a contact event. This problem can be solved by an optimization techniques including unequality constraints which corresponds exactly to the physical properties of ...
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Frictional Dissipation in Stick-Slip Sliding
Physical Review Letters, 2007The time variation of the frictional force between two surfaces, undergoing stick-slip sliding across a molecularly thin film of a confined model liquid, was examined at high time and force resolution, showing clearly that dissipation of energy occurs both during the slip, and at the instant of stick (via transfer of residual momentum).
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