Notch coefficient estimation method, the notch coefficient estimation system and the notch coefficient estimation device

摘要

PROBLEM TO BE SOLVED: To provide a notch factor estimation method.;SOLUTION: A notch factor acquisition method includes: a load giving step for giving a load to a test piece having a notch in such a manner that the stress amplitude becomes gradually greater; a temperature variation calculation step for calculating a temperature variation quantity at each level in the load giving step for each of a notched bottom and a smooth part; a fatigue intensity estimation step for plotting the stress amplitude and the temperature variation quantity for each of the notched bottom and the smooth part and estimating the fatigue intensity of each of the notched bottom and the smooth part on the basis of their inflection points; and a notch factor estimation step for estimating a notch factor on the basis of the estimated fatigue intensity of each of the notched bottom and the smooth part.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT