Bending-tension fatigue of wire rope

Bending-tension fatigue of wire rope

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This paper summarises a thesis written by the author [Ridge 1992] which examines the effect of bending-tension fatigue on the endurance of wire rope. The parameters relevant to a study of this kind of fatigue can be identified from a review of the work previously performed on the two constituent forms of bending- tension fatigue: bending over sheaves and tension-tension fatigue. Apparatus has been designed which allows variation of each of the major variables. This apparatus has been used to carry out an extensive investigation into the relative effect on bending-tension endurance. Tests in bending over sheave and tension-tension fatigue have also been performed to determine the relative influence of bending-tension fatigue. Finally a model is proposed which allows the prediction of bending-tension fatigue behaviour from a knowledge of the bending over sheaves and tension-tension fatigue endurance.

Author: I. Ridge