Method and apparatus for determining low-cycle fatigue of mechanical component, and storage medium

A method for determining low-cycle fatigue (LCF) of a mechanical component, comprising:

• acquiring multiple cyclic operating conditions of the mechanical component in multiple operating cycles;
• for each of the multiple operating cycles, computing a Weibull scale parameter based on one corresponding cyclic operating condition in the multiple cyclic operating conditions;
• for each of the multiple operating cycles, computing a hazard rate of the mechanical component based on the Weibull scale parameter;
• and
• determining LCF of the mechanical component based on the hazard rates in the multiple operating cycles;
• wherein the Weibull scale parameter is used to describe the effect of a geometric shape and a stress-strain state of the mechanical component on an LCF lifespan expectation of the mechanical component;
• wherein the hazard rate is the probability of crack initiation occurring in a predetermined cycle when crack initiation has not occurred up till the cycle preceding the predetermined cycle, wherein the predetermined cycle is an operating cycle corresponding to the hazard rate in the multiple operating cycles.