Modeling of braided wire ropes under tension and torsional loads

Abstract

In view of the urgent need for the safety performance of the braided wire ropes in power grid construction, this study analyzes the mechanical responds of a braided wire rope under the tension and torsional loads. The mechanical responds of the strands under tension, torsional, and tension–torsion loads are studied, and the mechanical response equations of the strands under the above loads are obtained. Furthermore, a mechanical respond model of the rope under the tension and torsional loads is established using the method of rope strand unfolding. The strain of the strands in the axial direction of the rope is used to determine the strain of the braided wire rope. The stress and strain expressions of the whole rope under the tensile–torsional load are obtained. The whole rope test under the tension–torsion load is carried out, and the axial displacement curve under the same load is obtained. The reliability of the mechanical model is verified by comparing the experimental value with the theoretical value.