Figure 59. This rope was subjected to repeated bending over sheaves while under normal
loads. Fatigue breaks in the individual outer wires resulted. The wire breaks are square-end
and the majority are found on the crown
of
the strands.
Figure 60. An example
of
fatigue fractures
in
a wire rope that was subjected
to
heavy loads
while over small sheaves. Most wires are breaking in the valleys between the strands. These
valley breaks are a result
of
strand-to-strand nicking. See Figures 44A and B.
Figure 61. A typical example
of
localized wear. The cumulative effect can be minimized and
the rope life extended
jf
a suitable cut-off practice was employed.
82 • Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
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