Method of predicting bending life of electric wire or electric wire bundle

摘要

A master curve indicating correlation between a bending life and a distortional change quantity of a wire is previously acquired. The master curve is acquired by repetitively bending a single wire and analyzing (CAE analysis with a computer or the like) a distortional change quantity (DELTAepsi) of the surface of its insulating layer while actually measuring the bending life. Then, the distortional change quantity (DELTAepsi) of the surface of the insulating layer of the wire or the like regarded as the object for predicting the bending life is calculated (CAE analysis or the like). The bending life of the wire or the like is predicted by collating the calculated distortional change quantity (DELTAepsi) of the wire or the like serving as the prediction object with the aforementioned master curve. The bending life can be correctly predicted regardless of product conditions of the wire or the like.