DEVICE AND METHOD FOR ESTIMATING FATIGUE FRACTURE PROBABILITY OF MEMBER, AND COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To more accurately estimate the probability of fatigue fracture occurring at a low probability in a long life region of a machine component than the conventional art.;SOLUTION: The effective volume V_ep of the member is calculated by adding a stress correction amount σ_corr to an effective stress (stress amplitude) σ_ip at each position of the member so that the fatigue strength of the member varying correspondingly to the mean stress varying with the position of the member is constant at a value when the mean stress of the member is 0 (zero) apparently regardless of the position of the member. The accumulated fracture probability P_fp by the fatigue of the member is derived using the effective volume V_ep of this member.;COPYRIGHT: (C)2011,JPO&INPIT