Rationale: Development of string rails with low weight per meter and high-performance characteristics that determine durability, wear resistance, reliable grip vehicle wheels to the rail rolling surface is a vital task.
 Objective: investigate impact geometric parameters steel wheel flexible polymer coating on performance characteristics; choose most optimal contact pair wheel-rail.
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Due to its good cutting performance in titanium alloy machining, integral end mills are more and used machining aero-engine impeller blades. The tool spiral groove plays the role of chip acceptor removal, accuracy parameters has an important effect on performance. In grinding process groove, wheel’s external is mainly involved task. wear degree related time times wheel, wheel will lead change g...

Abstract The development of numerical models able to compute the wheel and rail profile wear is essential improve scheduling maintenance operations required restore original shapes. This work surveys main in literature for evaluation uniform profiles. standard structure these tools includes a multibody simulation wheel–track coupled dynamics module implementing an experimental law. Therefore, a...

A wear prediction model is built to research the of curved switch rail in a high-speed turnout. The Archard used analyze profile evolution law. non-Hertzian contact Kik–Piotrowski method based on virtual penetration as algorithm for model. dynamic vehicle–curved system predicted profiles and measured wheel with different stages established. effect profiles’ vehicle performance analyzed. results...

BACKGROUND Measurements of exposure to vibrations from hand-held tools are often conducted on a single occasion. However, repeated measurements may be crucial for estimating the actual dose with good precision. In addition, knowledge of determinants of exposure could be used to improve working conditions. The aim of this study was to assess hand-arm vibration (HAV) exposure during different gri...

This paper introduces an analytical assessment framework for evaluating grinding wheel performance derived from the model of cutting and sliding force components. Four new parameters are proposed based on topography. These normalized through aggressiveness number, which circumvents influences geometry kinematics. The is validated experiments with different topographies obtained by changing dres...