Investigation Of Wheel Wear Behaviors Subjected Under Dry And Wet Loading Conditions A Case Study Of Addis Ababa Light Rail Transit

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Wheel/rail wear continues to be an important factor that limits the service life of rolling stock. Wheel-rail surfaces are subjected to contact stresses that results in surface damage which is observed as either wear or contact fatigue damage mechanisms. The contact stresses are the result of train and passenger loads, speed, friction, and other operating conditions, and the effect of the stresses on the damage depends on the loading conditions (lubricated or dry). The analysis of wheel damage due to wear is very important to determine the service life of the rolling stock and railway track. The aim of this research was to investigate the wear behavior of the train wheels due to wet and dry loading conditions for the case of Addis Ababa Light Rail Transit (AALRT) through friction, speed and creep forces analysis. All forces and wear parameters were analyzed using a train simulation model in SIMPACK software. The effect of overloading condition during dry and wet contact on wear rate, wear volume and wear resistance of the wheel materials were determined and compared. The higher coefficient of friction (CoF) value, which is in the case of dry sliding contact condition, resulted in the formation of higher longitudinal and lateral creep forces that increased the wear values in terms of volume loss, wear rate and wear depth, and wet sliding contact (with low CoF) resulted in low wheel wear parameters. Speed variation showed that an increase in the speed increased the wheel wear volume wear depth and wear rate, and these are relatively lower in the case of low speed operations.

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Investigation Of Wheel Wear Behaviors Subjected Under Dry And Wet Loading Conditions A Case Study Of Addis Ababa Light Rail Transit

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