抄録
Head check is one of the most typical cracks appeared on the rail. It is widely known that head check is appeared at the rail surface of the gauge corner in the high rail in a curved section with a radius of about 800m. On the other hand, some head check appear at the top of the rail surface in the low rail. However the initiation factors of the head check appearance of the low rail has not been clarified. Therefore, we conducted the field test to measure of wheel/rail contact force and confirm if it is an initiation factor of the head check appearance in the low rail.
