April 1, 2015 Thesis Open Access

Fitsum Getaneh

DCAT Export

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    <dct:title>THERMAL AND MECHANICAL ANALYSIS OF A.A. LRT BRAKE DISC FROM COMPOSITE MATERIAL BY FEM</dct:title>
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    <dct:description>&lt;p&gt;The modeling of thermal and mechanical effects during braking has become increasingly&lt;br&gt; important in product design in different transport means, road vehicles, airplanes, railway&lt;br&gt; vehicles, and so forth. The thermal and mechanical analysis is a very important stage in the&lt;br&gt; study of braking systems, especially of railway vehicles where it is necessary to brake huge&lt;br&gt; masses because the thermal load of a braked railway disc prevails compared to other types of&lt;br&gt; loads. In the braking phase, kinetic energy transforms into thermal energy resulting in intense&lt;br&gt; heating and high temperature states of railway discs. Thus induced thermal loads determine&lt;br&gt; thermo-mechanical behavior of the structure of railway discs. In cases of thermal overloads,&lt;br&gt; which mainly occur as a result of long term braking on down grade railroads and braking to&lt;br&gt; standstill on a flat railroad, the generation of stresses and deformations occurs whose&lt;br&gt; consequences are the appearance of cracks on the discs, brake judder, thermo-elastic&lt;br&gt; instability and finally brake disc failure. The importance to precisely determine the&lt;br&gt; temperature distribution caused by the transfer process of the heat generated during braking&lt;br&gt; due to the friction on contact surfaces of the braking system makes it a challenging research&lt;br&gt; task.&lt;/p&gt;</dct:description>
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