Fig 1.
Stress on a fibre unit in a static environment.
Fig 2.
Friction generated by the motion of fibre yarn units.
(a) Axial sliding; (b) Twisting sliding.
Fig 3.
Structure of the dynamic rope wear test machine.
Fig 4.
Diagram of the structure of the yarn wear test machine.
Table 1.
Fibre yarn abrasion test conditions.
Fig 5.
Influence of twist level on the wear fracture of PET yarns with marine oil agents in (a) dry and (b) wet conditions.
Fig 6.
Influence of twist level on the wear fracture of PET yarns without marine oil agents in (a) dry and (b) wet conditions.
Fig 7.
Influence of twist level on the wear fracture of HMPE yarns in (a) dry and (b) wet conditions.
Fig 8.
Influence of twist level on the wear fracture of PA yarns in (a) dry and (b) wet conditions.
Fig 9.
Impact of dry and wet conditions on the wear fracture of PET yarns (a) with and (b) without marine oil agents.
Fig 10.
Effect of dry and wet conditions on the abrasion and breakage of fibre yarns (a) HMPE (b) PA.
Fig 11.
Impact of marine oil agents on the wear fracture of PET yarns under (a) wet and (b) dry conditions.
Fig 12.
Influence of different fibre materials on the wear fracture of yarns in (a) dry and (b) moist conditions.
Fig 13.
Structure diagram of a 3000 tons and below rope tensile reciprocating test machine.
Fig 14.
Diagram of the synthetic fibre rope test segment model.
Table 2.
Detailed specifications of the synthetic fibre rope test samples.
Fig 15.
Immersion and installation of the synthetic fibre rope: (a) rope soaking and (b) load stretching.
Fig 16.
Deformation of the rope under different load conditions during the preloading test.
(a) Load variation curve; (b) Deformation curve.
Fig 17.
Stress–strain curves for the synthetic fibre ropes during the preloading test.
Fig 18.
Deformation of the polyester and nylon ropes under different loads during the initial installation test.
(a) Load variation curve; (b) Deformation curve.
Fig 19.
Stress–strain curve of the synthetic fibre rope in the initial installation test.
Table 3.
Creep data from the static stiffness testing of the initial rope installation.
Fig 20.
Fitting of creep coefficients for quasi-static rope stiffness during the initial installation phase.
(a) Polyester rope; (b) Nylon rope.
Table 4.
Calculation results for the static stiffness of the initially installed ropes.
Fig 21.
Deformation of the ageing rope under different load conditions in the quasi-static stiffness test.
(a) Load change curve; (b) Strain curve.
Fig 22.
Stress–strain curves of the ageing synthetic fibre ropes in the ageing test.
(a) Static and dynamic load; (b) Static load phase.
Fig 23.
Best-fit lines for the static stiffness creep coefficient during the ageing stage.
(a) Polyester rope; (b) Nylon rope.
Table 5.
Creep data for the static stiffness test of aged ropes.
Table 6.
Calculated results for the static stiffness of the aged rope.
Fig 24.
Design chart of the static stiffness of the fibre ropes.
(a) Initially installed rope static stiffness; (b) Aged rope static stiffness.