International Session (Structural Engineering)

[CS2-24] STUDY OF CHANGE IN MICROSTRUCTURE OF STEEL SURFACE SUBJECTED TO CYCLIC FATIGUE LOADING

〇Aleena Saleem¹, Hiroshi Tamura¹, Hiroshi Katsuchi¹, Hitoshi Yamada¹ (1.Yokohama National University, Japan)

Keywords:Low cycle fatigue, Surface treatment, Earthquake-resistant capacity, Wrinkle formation, Power spectral density

This paper analyses the change in geometry of steel surface subjected to cyclic loading under the influence of various surface treatments and steel grades by focusing on spatial periodicity appearance. The process of wrinkle formation is emphasized in this research to show its relevance with crack occurrence. Mountains-Map software is used to qualitatively analyze surface contours at the start and end of loading cycles. Two processed surfaces, one mechanically polished and other blasted are compared. Power spectral density (PSD) analysis is performed and 3D roughness parameters are evaluated.