COMPONENT FRACTURE EVALUATION DEVICE, COMPONENT FRACTURE EVALUATION METHOD, AND COMPUTER PROGRAM

摘要

A probability in which a stress amplitude à p of an operating stress exceeds a stress amplitude à w of a fatigue strength (a fatigue strength excess probability p v0 of a virtual cell) at each virtual cell in which a region of a machine component is equally divided so that one inclusion is contained therein and having a virtual unit volume V 0 is derived on an assumption that a distribution function of an inclusion size ˆš area follows a generalized Pareto distribution. Then a probability in which the stress amplitude à p of the operating stress exceeds the stress amplitude à w of the fatigue strength (a fatigue strength excess probability p fV of the machine component) in at least one virtual cell is derived from the fatigue strength excess probability p v0 .