چكيده به لاتين
Abstract:
In the present study, a three-dimensional wheel and rail model with a length of 600 mm, was designed and the effect of roughness was analyzed in dry and wet conditions.
In the next step, the effects of the presence of the third body were investigated. In the following, the roughness effects were determined in the worst-wheeled wheels, healthy rims, worn wheels and worn-worn wheels. Finally, the thermal stresses in steady state (after 8-30 minutes, the wheel temperature was 250 ° C It is proven and in the contact region the temperature of the thin layer is higher and, after contact, returns to the same constant temperature).The results of this study indicate that in dry conditions, with increasing roughness, the thermal stresses, the temperature increase and the depth of the strain of plastic, the results are reduced to worn wheels, healthy rims, worn wheels, and The worn wheel - the worn-out rails - can be generalized, and in wet conditions, the results show a roughness of the image of the above mentioned. In the presence of the third body of the liquid, the level of thermal stresses, the temperature increase and the depth of the strain of the plastic decreased, and this degradation is increased with increasing viscosity In the presence of solid solids 3, the thermal stress levels, the temperature increase and the depth of plastic strain increase
Find out The results show that under dry conditions with increasing roughness, the probability of damage to submerged surfaces is increased compared to surface damage due to increased depth of penetration of maximum stress
Keywords: Roughness, third object, wheel and worn rail, tension, temperature increase
