June 1, 2017 Thesis Open Access

OUBAH ISMAIL AHMED

DCAT Export

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        <foaf:name>OUBAH ISMAIL AHMED</foaf:name>
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    <dct:title>A Thesis`s progress submitted to the School of Graduate Studies of Addis Ababa University in partial fulfillment of the requirements for the Degree of Masters of Science in Railway Mechanical Engineering</dct:title>
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    <dct:description>&lt;p&gt;Wheel and rail is one of the most important material used to support and guide rail vehicle safely&lt;br&gt; and smoothly. Since wheel and rail suffers from various interacting mechanical and thermal&lt;br&gt; forces, friction modifiers, various contaminants and environmental atmosphere, wear poses large&lt;br&gt; Problem on wheel and rail.&lt;br&gt; Wheel and rail wear can be result in an extensive cost for truck owner, if it is not predicated and&lt;br&gt; prevented in an efficient way. To limit these costs, one measure is to predicate and prevent wheel&lt;br&gt; and rail wear through wear modeling.&lt;br&gt; The purpose of this research is to investigate the wear analysis on wheel / rail in rolling and&lt;br&gt; sliding contact using CATIA V5 R16 software and ANSYS 16.0 Workbench. The wear of the&lt;br&gt; wheels has been studies on stress structure as result and the analysis is done for two wheels&lt;br&gt; having different material composition (that is Bainitic steel which is new material and R7 which&lt;br&gt; is using by Ethiopian Light Railway Transit AALRT)&lt;br&gt; Using stress output as input for structural analysis different stress concentration are observed&lt;br&gt; The result obtained for the two wheels shows that wheel two has excellent hardness, strength and&lt;br&gt; have good resistance wear&lt;br&gt; Therefore, Bainitic steel can be applied to wheels in railway system&lt;/p&gt;</dct:description>
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