Relationship between Fracture Modes and Fractality of Fracture Surfaces

概要

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The fracture modes are classified into two categories ; ductile fracture and brittle fracture. This paper presents the study on the relationship between the fracture mode and the fractality of the fracture surface. Using iron and steel changing the carbon contents, the three-point bending fracture experiments were conducted. The critical stress intensity factor K_<IC> was calculated as the macroscopic parameter. Furthermore, from the microscopic viewpoint, the fractality of the fracture surface was investigated using the surface profile curve obtained by the laser focus displacement meter, comparing with the SEM photographs of the fracture surface as the microscopic observation. The fractality of fracture surface depends on the fracture mode, which is explained by the facture mechanism. The final purpose of this study is to identify the fracture mode by quantifying the fracture surface using the concept of fractality.
社団法人日本機械学会の論文
2003-07-15