Study on residual stress and strain during rail rolling contact of straight U75V rail

Abstract

The distribution of residual stress produced by straightening process in side the rail is obtained. And then the residual stress result is used as the initial condition to study the stress and strain variation rule of wheel-rail rolling contact process. Results shows that with the increase of rolling times, the straightening residual stress of rail quickly redistributed and gradually stabilized. The residual stress of rail head is mainly affected by wheel rolling, while the rail waist and bottom is mainly affected by straightening. The effect of straightening residual stress on residual shear stain is relatively small.

Keywords

• U75 Rail
• wheel rolling
• straight rail
• stress
• strain