1305 Extreme value plots of the maximum dimple sizes associated with fracture behavior of tensile specimens

Extreme value analysis has been applied to clarify the statistical nature of ductile fracture surfaces associated with fracture behavior of tensile specimens for JIS SS400 steeel. Both the notched tensile specimens with different notch acuity and the unnotched specimens were employed to obtain a wide range of stress triaxiality.The ductile fracture surfaces were composed of variously sized dimples. The extreme value probability plots of the maximum dimple sizes in a given unit area were performed to correlate the dominant feature of the ductile fracture surfaces with the fracture strains. The location parameter that defines the maximum dimple size distribution showed a clear dependence on the fracture strains of tensile specimens. The extreme value analysis of the ductile fracture surface should be recommended as a powerful tool for providing a quantitative information regarding the fracture behavior of the mechanical components.