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Information × Registration Number 0212U001706, 0112U000121 , R & D reports Title Research and development studies of the friction properties of composition brake shoes popup.stage_title Head Vodyannikov Yuriy Yakovlevych, Registration Date 28-02-2012 Organization Ukrainian State Reserch institute of car building popup.description2 Composition brake shoes, generally used on freight cars, having higher friction coefficient in comparison with cast iron shoes, have a negative affect on the wheel thread, because almost all heat evolved during the process of braking is received by the wheel as a result of low heat conduction of the composite material. That's why great importance is attached to the issues connected with choosing the composite materials for brake shoes, friction properties (friction coefficient) of which meet the requirements of service conditions optimally. Test results of composite brake shoes which friction properties were defined on the inertial test bench were analyzed. In the process of research it was proposed to estimate data scattering of the brake shoes friction coefficient using methods of mathematical statistics and theory of relativity, because high values of friction coefficient can lead to wheel sliding when braking, and low values can lead to insufficient braking efficiency of the rolling stock. Offered mathematical relations let to define the probability of expectancy of hitting for friction coefficient values to the normalized interval, the probability of exceeding of the maximum normalized quantity by the friction coefficient of the brake shoe, and also the probability that friction coefficient values will be lower than minimum normalized value. Product Description popup.authors Водянніков Ю.Я. Гречко А.В. Донченко А.В. Ніщенко О.Є. . Свистун С.М. Шелейко Т.В. popup.nrat_date 2020-04-02 Close