Modelování a testování únosnosti ocelových lan

Abstract

The dissertation thesis deals with the creation of a methodology for numerical modeling of the load - bearing capacity of single-strand and multi-strand steel ropes. Steel wire ropes have many practical applications on which human lives often depend. Therefore, in these cases it is essential to emphasise safety by regular inspection of the wire rope and detailed knowledge of its construction and material characteristics. There is currently no simple way to predict the load - bearing capacity of wire ropes, with the emphasis on low financial cost and time efficiency. In the first part of the thesis, two wire rope designs are selected, experimental specimens are prepared and experimental tensile tests are carried out to obtain mechanical properties of the wire rope components. In the second part, numerical models are designed and then validated by the obtained experimental data. The results of the experimental and numerical approach for the evaluation of the rope load - bearing capacity are compared. The third part describes the proposed methodology for the numerical modeling of the wire rope load - bearing capacity. Emphasis is given on the applicability in industry, therefore the numerical analyses work with beam elements of finite element mesh. The last section is devoted to the implementation of the surface defect of ropes and monitoring the effect of the selected defect on the overall load - bearing capacity of these ropes.