Mechanical Behavior Analysis for Damage Prevention of Railway Wheel in Wheel-Rail Interface

초록

As wheel-rail contact is among the main sources of damage generated by rail vehicle, finding ways to reduce damage is task of growing importance. To ensure the safety of wheel, the railway wheel has been standardized such as UIC, EN and so on, but the chemical composition and the mechanical property for railway wheel in the standard were merely requested. Recently, the damages of railway wheel have been continuously occurred in service running. Because of wheel damage with shelling, flat and thermal crack, the maintenance cost for the railway wheel has been increased. It is necessary to evaluate the mechanical behavior of railway wheel in order to reduce wheel damage. In present study, the fracture mechanics characteristics such as threshold stress intensive facto and fracture toughness and mechanical properties of railway wheel such as impact energy, hardness, tensile strength and cycling fatigue have been performed. The result shows that the mechanical behavior of railway wheel has to evaluate in order to reduce the wheel damage.