レールダークスポットの再現

概要

論文の詳細を見る
A newly developed two-disk rolling -sliding contact machine has been used to investigate rail dark-spot defects or rail shelling occurring frequently on running surfaces of railway rails carrying high-speed traffic. Experiments have been carried out by changing the slide-to-roll ratio under various lubrication modes. As a result, it has been found that dark-spot defects, which are very similar to those appearing in actual rails, are produced only by frequent repetition of dry and water lubrications. That is, the surface of the rail containing the crack, which propagates at an acute angle to the surface not only in the direction of motion of the load but also in the opposite direction, sinks a little and becomes dark. Experiments have also confirmed that water that has entered the crack plays an important role in the crack growth.
社団法人日本機械学会の論文
1995-08-25