Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Friction Testing"”.
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The effect of archwire vibrations on the stick-slip behavior of the bracket-archwire interface utilizing clinically relevant tipping moments
This study evaluated bracket-archwire frictional resistance as a function of ligation method and archwire vibration. In vivo archwire vibrations were measured to obtain frequencies and amplitudes for ex vivo testing. Active and passive ligation methods were compared for 9 vibration scenarios …
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Effect of fullerene containing lubricants on wear resistance of machine components in boundary lubrication
… real contact pressure. Computer controlled wear friction testing methodology and equipment were designed, developed and implemented for obtaining reliable and objective experimental data. In addition, optical and scanning electron microscopy and standard surface texture analysis were employed. …
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Defining the role of elastic lubricants and micro textured surfaces in lubricated, sliding friction
Solutions for reducing friction in sliding, lubricated systems include modifying lubricant rheology using polymers and adding a micro-scale texture to the sliding surfaces, but the mechanism of how lubrication properties and surface texturing interact is poorly understood. This thesis presents a …
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A carbon nanotube bearing and Stodola rotor
… bonded and can slide on each other with low friction. While MWNT based rotors have been previously constructed, they have so far been limited to horizontally oriented nanotubes. The rotor uses a vertically aligned tube, which allows superior control of the rotor geometry, enabling improved …
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Evaluation of International Friction Index and High-Friction Surfaces
… pavement surface should exhibit good friction and texture depth to reduce roadway highway accidents. This is why friction is starting to receive increased attention in the pavement management process. There have been numerous research efforts by different countries and agencies to …
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Fracture and Friction Characterization of Polymer Interfaces
… Test standards established for mode I fracture testing of adhesive joints are adapted to evaluate the fracture resistance and interface between two printed acrylic-based photopolymers. Significant differences in fracture energy and loci of failure between the selected test configurations were …
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Reducing Highway Crashes with Network-Level Continuous Friction Measurements
… surfaces of the tire and the pavement form frictional forces. The pavement's contribution to tire-pavement friction is referred to as skid resistance and is provided by pavement microtexture and macrotexture. The amount of skid resistance depreciates over time due to the polishing action of …
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Road Surface Measurement and Multi-Scale Modeling of Rubber Road Contact and Adhesion
… is to understand the intricate mechanisms of friction. Pavement texture is a feature of the road surface that determines most tire-road interactions, and can be grouped into two classes: macro-texture, resulting mainly in the hysteretic component of friction, and micro-texture, resulting in …
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Mixed and boundary lubrication in synovial joints
… mixed or boundary regime. Under these conditions friction must remain low to prevent damage to the articular cartilage. The lubrication mechanisms which continue to provide low friction and minimum wear in synovial joints are far from clearly understood and few adequate studies have been …