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| Case Histories |
Failure of Wire Rope
Specimen: 9/16-inch diameter; 8 x 26 Cushion Pac 8 High Performance Wire Rope
Material: Improved Plowed Steel
Background: The wire rope was used on a hoist cable from a 110-foot crane in
the shipping area of a manufacturing plant. The wire rope
fractured while lifting bundles which weighed only approx. 28% of
the maximum recommended load capacity of the crane.
Service Life: 6 Months
Findings: The majority of the breaks in the wire rope occurred in a similar
region of the strand’s helix. This would indicate that the fracture
had initiated by bending fatigue which would load the wires
repeatedly in one plane. Multiple fatigue breaks eventually lead to
the ultimate catastrophic failure of the wire rope. |
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