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Railway vehicle axle stress state

by：Waxing 2020-11-13

Railway vehicle axle stress profile - 2018 08 - 27 rotating bending load is the main axle in run under load. Car body through the bearing the weight of the applied on both ends of axle shaft neck, and the direction of the force down; And through the support of the wheel on the axle wheel seat upwards, in this way, the shaft body, wheel, dustproof baffle and shaft neck and bending load. The stress distribution of the axial compressive stress, the shaft surface, the upper high as the maximum tensile stress, along the circumference of a circle down gradually decay to zero, then into a compressive stress, increase gradually, until the lower lows for the maximum compressive stress. Maximum depth along the radial direction, the surface stress, the center is zero. Due to axle revolve at run time, determine the shaft surface occurred periodically, compressive stress, which is a kind of cyclic loading. Torque load in the axle is the second, mainly in the curve ( Especially on the small radius curve) Is generated. The same corner, the wheels go on track in the short distance, the distance and outside the wheels on the track, therefore, is produced on the axle torque, torque load. Torque load of the maximum shear stress has two directions, namely circumferential direction and the longitudinal axle. Similarly, in the shaft surface stress is the largest, diminishing depth along the radial direction, to the axle center attenuation is zero. But the absolute value of axial stress in all parts of the surface is the same, of the principal stress function of the torsion load plane and axial 45 & deg; 。（ Source: the public 'resources of railway vehicle)

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