In the past only generalized correction factors were used in estimating the service life for ropes subjected to angular pull. The tests carried out to date show, however, that there are great differences for various types of rope designs. The specific differences are to be worked out with the help of further testing which is being carried out at present. The calculational uncertainty presently prevailing when estimating the service life for ropes in rope drives is to be eliminated by employing modified correction factors - which have been statistically verified - for angular pull. Systematic evaluation and analysis of the test results by way of multiple linear regression it made it possible to prepare a provisional calculation approach with which the reduction in service life resulting from angular pull can be quantified in a first approximation. Due to the multitude of parameters involved, some of the parameters and questions, such as the groove angle, have not yet been conclusively clarified. On the basis of additional testing the trial results and findings derived here are to be reexamined and questions which are still open are to be answered. Among the items to be examined are the rotation properties, i.e. the severe twisting of the rope in the free length of rope at long bending lengths 1. At present events at the flanks of the grooves (rolling and sliding) are being examined more closely.
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