Patent ID: 9069917
Filing Date: 2015-06-30
Classification: G01M,G01N,G06F

Abstract:
1. A component fracture evaluation method evaluating fracture performance of a machine component, comprising: analyzing a sample made up of the same kind of material as a material constituting the machine component to extract inclusions in the sample; a threshold value excess number of inclusions deriving process deriving a threshold value excess number of inclusions being the number of inclusions whose inclusion size exceeds a threshold value among the inclusions contained in the sample based on the inclusion size being a size of the inclusion extracted by the analysis; a coefficient deriving process deriving coefficients of a generalized Pareto distribution based on the inclusion size of the inclusion extracted by the analysis, the threshold value excess number of inclusions by the threshold value excess number of inclusions deriving process, and the threshold value on an assumption that a distribution function of the inclusion size of the inclusion extracted by the analysis follows the generalized Pareto distribution; a virtual inclusion ratio deriving process deriving a virtual inclusion ratio being a ratio between the threshold value excess number of inclusions being the number of inclusions whose inclusion size exceeds the threshold value among the inclusions contained in the sample and a zero excess number of inclusions being the number of inclusions whose inclusion size exceeds “0” (zero) among the inclusions contained in the sample; and a virtual unit volume deriving process deriving a virtual unit volume being a volume of a virtual cell when the machine component is equally divided by plural virtual cells each containing one inclusion based on the threshold value excess number of inclusions, the virtual inclusion ratio, and a volume of the sample, wherein an index evaluating the fracture performance of the machine component is derived by a unit of the virtual cell having the virtual unit volume derived by the virtual unit volume deriving process, and the fracture performance of the machine component is evaluated by using the derived index.