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Showing 1 to 11 of 11 for “"wheel wear"”.
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Prediction of wheel wear profiles by analytical methods
A method is presented for the prediction of the wear history of a train wheel by a numerical simulation. The method consists of three fundamental steps. First, the wheel/rail contact geometry is characterized. Contact points, Herzian contact patch area and creep coefficients are determined as …
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A computational approach to the prediction of wheel wear profiles
Wheel wear profiles are interesting for both economic and performance reasons. A good wheel profile design should be able to resist wear and to allow stable vehicle running. The ability to resist wear reduces the wheel reprofiling and replacement cost. The ability to allow stable vehicle running is …
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A study of vitreous-bonded abrasive materials.
… performance of vitreous-bonded alumina grinding wheels. The effect of bond composition considered in this work can equally be applied to grinding wheels which use silicon carbide (carborundum) as the abrasive medium. The bonds considered in this study are described as sintering bonds (high clay …
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An investigation into Vibratory Grinding of hard-to Machine Aerospace Materials
… feed rate, using an aluminium oxide grinding wheel, with the application of coolant fluid to enhance grinding difficult to machine aerospace materials, this approach is considered to be an alternative to the usage of super abrasive wheels such as CBN and diamond wheels currently been used, …
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The machinability of a gamma titanium aluminide intermetallic
… (SiC) and superabrasive (diamond and CBN) wheels with free jet nozzles. Benchmarking of the -TiAl alloy against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental …
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Investigation of Fluid Flow in Grinding using LDA Techniques and CFD Simulation
… reduce the risk of thermal damage and reduce wheel wear. The thesis describes the work completed in the investigation of the complex fluid flow that occurs in the region close to the grinding contact zone between the wheel and workpiece and the boundary layer phenomena around the periphery of …
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Development of A closed Loop Control System for Vibration Assisted Grinding
… surface. Axial oscillation (parallel to the wheel axis) allows the grains to cut with two more faces. With vibration in two directions, the wheel exposes four times more cutting edges (two edges per oscillation) than in continuous cutting which uses only one edge, which is a great advantage …
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Accurate Wheel-rail Dynamic Measurement using a Scaled Roller Rig
… third-body layer deposits (because of the wear of the wheel and/or roller) on creep or traction forces. The wheel-rail contact forces, also referred to as traction forces, are critical for all aspects of rail dynamics. These forces are quite complex and they have been the subject of several …
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Effect of Wheel and Rail Conditions on Contact Dynamics and Mechanics
… how different running conditions affect the wheel-rail interface (WRI) dynamics and mechanics under repeatable and precise test settings. The advanced roller rig is used to emulate wheel loads, lateral positions, angles of attack, cant angles, and creepages that commonly occur in a train. It …
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An investigation into vibration assisted machining : application to surface grinding processes
… vibration was getting more noticeable at higher wheelspeeds and workspeeds. At those speeds the reduction in workpiece surface roughness reached 12.6%. Moreover, it was found that the application of vibration increased the material removal rate, reduced the cutting forces, increased the G-ratio …
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Experimental Evaluation of Wheel-Rail Interaction
… provides a detailed experimental evaluation of wheel-rail interaction for railroad vehicles, using the Virginia Tech Federal Railroad Administration (VT-FRA) Roller Rig. Various contact dynamics that emulate field application of railroad wheels on tracks are set up on the rig under precise, …