Rope Deterioration – Wear and Abuse

Rope Deterioration – Wear and Abuse
1. Mechanical damage due
to rope movement over sharp edge projection while under load.
2. Localized wear due to
abrasion on supporting structure. Vibration of rope between drum
and job head sheave.
3. Narrow path of wear resulting
in fatigue fractures, caused by working in a grossly oversize
groove or over small support rollers.
4. Two parallel paths of
broken wires indicative of bending through an undersize groove in the sheave.
5. Severe wear, associated
with high tread pressure. Protusion of fibre main core.
6. Severe wear in Lang Lay,
caused by abrasion of cross-over points on multi-layer coiling
"Severe wear
7. Corrosion of severe degree
caused by immersion of rope in chemically treated water.
8. Typical wire fractures
as a result of bend fatigue.
9. Wire fractures at the
strand, or core interface, as direct from ‘crown’ fractures,
caused by failure of core support.
10. Break of IWRC resulting
from high stress application. Note nicking of wires in outer
11. Strand core protusion
as a result of torsional unbalance created by ‘drop ball’ application
(i.e. shock loading).
12. Typical example of localized
wear and deformation created at a previously kinked portion of
13. Multi-strand rope ‘bird-caged’
due to torsional unbalance. Typical of build-up seen at anchorage
end of multi-fall crane application.
14. Protusion of IWRC resuting
from shock loading.


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