Structural Modeling of the Tensile Behavior of Eight-Strand Ropes

摘要

Synthetic ropes are structures which offer flexibility and high tensile strength and are widely used in many applications including marine towing and mooring. With the development of rope manufacturing technology, synthetic ropes are available in many structural types. Eight strand plaited synthetic ropes have the advantages that no torque, and thus no rotation is induced when they are stretched, by virtue of the axial symmetric structures. In order to study and characterize the mechanisms of rope deterioration, and to predict the mechanical behavior of eight strand ropes, it is necessary to develop valid models for the eight strand ropes under different loading conditions. Such models can provide useful information on rope construction parameters which give desired rope mechanical behavior. As the first step, the tensile load-elongation behavior of eight-strand ropes has been studied by a structural modelling in which the rope tensile load, interstrand pressures, and strand relative movements are determined as functions of rope tensile strain and based on the rope geometries before and after deformation.