Prediction of operating time of steel wire ropes using magnetic NDT data

A strength assessment model is proposed for predicting the working time of wire ropes that have deteriorated. The distributed losses of the metallic sectional area and local wire breaks as measured by a magnetic flux detector are used as input data for the strength evaluation. A residual safety index for the damaged rope is treated as the parameter for the working capacity. The subsequent rope inspection and the corresponding strength state relative to the empirical permissible level are predicted. Several examples of the forecasting procedure are presented.

Author(s): A. Vorontsov, V. Volokhovski, J. Halonen and J. Sunio