가속열화시험 데이터를 활용한 엘리베이터 와이어로프 수명 예측

The life of elevator wire ropes is one of the most important characteristics of that product, which is closely related with the safety of users and its maintenance policy. It is not so economical to measure the life of elevator wire ropes in its use condition. In this study, the life estimation of elevator wire ropes (8x19W-IWRC) is considered using accelerated degradation test data. Bending fatigue tester is used to perform the accelerated degradation test with the acceleration factor of tensile strength. Under the assumption that the life of wire ropes is lognormally distributed, two life estimation methods are suggested and their results are compared : the first method is to estimate the life of wire ropes utilizing the accelerated life model with pseudo lives obtained from linear regression model, and the second one is to estimate it using logistic model based on failure probability.