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Showing 1 to 20 of 971 for “"sliding"”.
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Sliding wear of nitrided steels
The unlubricated sliding wear behaviour of gas nitrided, plasma nitrided, and ferritic nitrocarburized BS970,905M39 (EN41B) steels was investigated systematically from an engineering point of view. Commercial nitriding processes were employed, and the wear studies were carried out using a …
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Micromechanisms of polymer sliding wear
… (UHMWPE) during water-lubricated reciprocating sliding wear. The experimental work has been extended to study also the effect of molecular weight, fillers, lubrication, counterface roughness and sliding configuration on the polymer's transfer characteristics. The wear behaviour of …
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Frictional oscillations in elastomeric sliding
… configuration. Three regimes of sliding have thus far been identified: 1. Steady state sliding where the sliding friction is constant; 2. A high frequency self-excited oscillation of the test structure superimposed on the mean value of friction; 3. Stick-slip, where the …
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Thermal non-Newtonian elastohydrodynamic lubrication of line contacts under sliding-rolling and simple sliding conditions
… surface temperature is developed for simple sliding conditions. The most influential dimensionless groups are identified from the complete sets of dimensionless groups. Numerical results obtained for sliding and rolling and for simple sliding conditions are used to develop formulas for the …
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Sliding Mode Control with Chattering Reduction
<p>Sliding Mode Control is a powerful nonlinear control methodology that can handle parametric uncertainties and external disturbances. However, the discontinuous and high-frequency switching nature of the control law introduces the chattering phenomenon, which leads to potential actuator …
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Atomistic Study of Grain Boundary Sliding
… the creep deformation and damage, grain boundary sliding (GBS) plays a critical role. For example, in ceramics, GBS is the predominant mechanism since dislocation activity is quite suppressed. Although decades of work have gone in understanding GBS, there are several open questions like an …
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Temperature and friction of sliding surfaces.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1971.
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Nonlinear state estimation using sliding observers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
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The Sliding Friction of Bonded Solid Lubricants
… The general theories of friction for metals in sliding contact and the friction theory applied to solid film lubrication are reviewed. A section is also included on Herzian contact theory and its application to solid films. A screening test is described for 12 BSLs applied to commercial …
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The sliding wear of polymers against steel
… generate wear rate data for polymeric materials sliding at constant velocity against a hardened stainless steel base. The polymers investigated were ultra high molecular weight polyethylene (UHMWPE), ultra high molecular weight polyethylene-with a friction reducing additive (UHMWPE/FILL), …
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Soft hydrated sliding interfaces as complex fluids
… tribo-rheometry over 5 decades of sliding speed in increasing and decreasing steps. We postulate that the mechanisms of hydrogel-against-hard material lubrication are due to distinct complex fluid behavior characterized by weakly or strongly time-dependent response and …
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Sliding Resistance Along Discontinuities in Rock Masses
Made available in DSpace on 2014-12-08T23:56:19Z (GMT). No. of bitstreams: 1 6503699.pdf: 3957997 bytes, checksum: 21b5df6c8b55a3d9fe8d2156964d33a0 (MD5) Previous issue date: 1964
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Conduction noise in sliding charge-density waves
The conduction noise from sliding charge-density waves (CDWs) is studied in NbSe$\sb3$ and K$\sb{0.3}$MoO$\sb3$ (blue bronze). A statistical analysis of the fluctuations in the noise is presented: the probability distributions of the fluctuating spectral components, the power spectra of these …
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Conduction noise in sliding charge-density waves
The conduction noise from sliding charge-density waves (CDWs) is studied in NbSe3 and Ko.3Mo03 (blue bronze). A statistical analysis of the fluctuations in the noise is presented: the probability distributions of the fluctuating spectral components, the power spectra of these fluctuations (i.e. the …
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Dynamics of sliding mechanisms in nanoscale friction
… inappropriate due to the small dimensions of the sliding elements and the lack of excessive plastic deformation. This thesis presents a theoretical investigation of friction at the sliding interface by Molecular Dynamics (MD) simulations of ideal Lennard-Jones solids. The effect of the interfacial …
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Sliding Mode Controller Design for ABS System
… Hence, a nonlinear control strategy based on sliding mode, which is a standard approach to tackle the parametric and modeling uncertainties of a nonlinear system, is chosen for slip control. Due to its robustness properties, the sliding mode controller can solve two major difficulties involved …
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Nonlinear Sliding Mode Observer Applied to Microalgae Growth
… application of a nonlinear observer based off sliding mode to an algae system. Sliding mode is derived from modern control theory and is based off variable structure control. An algae system is modeled using the widely accepted Droop model for algae growth and a linear and nonlinear sliding …
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