Wear Analysis of Overhead Line Contact Wire Using Ansys Workbench Software
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Date
2015-05
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Addis Ababa University
Abstract
In this thesis, the main objective is analyzing the overhead line contact wire wear rate using ANSYS Workbench software. The wear is defined as the progressive loss of substances from the operating surface of a body occurring as a result of relative motion at the surface. The simulation of contact wire is performed on pin on disc model, where the model is used for sliding contact analysis. The pin made of contact wire materials which are Cu, CuAg, and CuNiSiCr in sliding contact with rotating disc that made of stainless steel. The wear analysis start from modeling pin on disc model to final solution phase is performed on ANSYS Workbench 12.0. Using a displacement boundary condition on pin, disc and holder and applying 617.63 rad/sec rotational velocity on disc the analysis is done. Then by varying the tensile load acted upon the tensile yield strength of the pin material and taking that the region of the pin where maximum equivalent stress occurred is failing or wearing out. The pin model that exhibit maximum equivalent stress has an approximate length of pin that worn out and is taken in order to find the volume of wear material. This process is performed for all sample pin materials taken for wear analysis. Using wear volume the wear rate and wear resistance of material is calculated, those values helps to determine which pin material has high strength to resist the wear from the maximum tensile load. As result of wear analysis, the CuNiSiCr copper alloy has better wear resistance property in comparison to the other sample pure Cu and CuAg materials.
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Keywords
wear analysis, equivalent stress, wear rate