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A study on the Mechanical Properties of the Braking Disk due to the Temperature Change(I)  

Kim Jae-Hoon (한국철도기술연구원)
Publication Information
Journal of the Korean Society for Railway / v.8, no.3, 2005 , pp. 222-227 More about this Journal
Abstract
This study investigates the change of the temperature and mechanical properties of the braking disk for the railway vehicle. The average temperature is measured about $100^{\circ}C$ and the maximum temperature is measured over $200^{\circ}C$ by non-contact sensor from Seoul to Chun-an. As a result of measuring, we determine the temperature of test(tensile and J-integral) at $20^{\circ}C,\;100^{\circ}C,\;200^{\circ}C$ and $300^{\circ}C$. In the test, the material values are decreased by the increasing of the temperature. But ratio of decreasing is the largest at $200^{\circ}C$, the tensile test value is decreased about $10\%$ and the J-integral test value is decreased $30\%$. The mechanical properties of this material are mostly changed at $200^{\circ}C$.
Keywords
Braking disk; Temperature change; Crack; J-integral;
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