Author(s)

S. Nishida & C. Urashima

Abstract

Study on contact rolling fatigue of head-hardened rail S. Nishida," C. Urashima* " Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University, Saga-shi, 840, Japan * Yawata R & D Laboratory, Technical Development Bureau, Nippon Steel Corporation, Tobata-ku, Kitakyushu-shi, 804, Japan ABSTRACT This is a report on the result of contact rolling failure of DH (head-hardened) rail using "the high speed rail testing machine", which had been developed to simulate the Shinkansen's truck. The contact rolling defects in the DH rail had been also observed in the laboratory. The total passing tonnage to failure of the DH rail becomes remarkably smaller than that of the plain carbon rail tested before. This tendency corresponds with the case of actual rail in service. INTRODUCTION The authors have originally developed "The High Speed Rail Testing Ma- chine" [1] to simulate the Shinkansen's traffic condition in Japan, especially to investigate the

Keywords