Author(s)

S. Nishida, N. Hatton & S. Horiuchi

Abstract

Effect of compressive mean stress on fatigue properties of structural steel S. Nishida', N. Hatton & S. Horiuchi' Faculty of Science & Engineering, Saga University, Honjo-machi 1, Graduate School, Faculty of Science & Engineering, Saga University, Abstract Pulsating fatigue tests have been performed using the specimens with or without surface deformation to investigate the effect of compressive mean stress on fatigue properties of structural steel. In addition, the specimen's surface has been observed by the successive taken replica method to investigate the change of surface state and fatigue crack initiation mechanism. The main results obtained in this tests are as follows; (1) The fatigue limits of the specimens with and without surface deformation are 147 and 371 MPa, respectively. The above much difference of the fatigue limit would be caused by the compressive residual stress and work-hardening due to roller working. (2) According to increase of the compr

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