| 摘要 |
[Object] Growth of a crack in a member is accurately and easily predicted. [Means to solve the problem] An the information processing device 100 memorizes in advance, for each portion (such as an R portion, a notch portion, and an outer peripheral portion) of a member in which growth of a crack is to be predicted, stress distribution ”Ã(a) in the depth direction obtained in the case no crack is present, a relationship between depth of growing cracks and creep contribution and a relationship between creep contribution and parameters C and m of the Paris's law; receives from a user an indication of a certain portion on the member; and predict the growth of the crack at the certain portion, based on the following equations: da/dN = C x (”K) m , and ”K = ”Ã(a) x (À x a) 1/2 (wherein "a" is a crack depth, N is the number of occurrences of a cyclic stress, C and m are constants determined for a member, and ”K is a stress intensity factor range). |
