Condition assessment of wire ropes subject to external wire wear

Condition assessment of wire ropes subject to external wire wear

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This paper quantifies the accuracy of inspection methods used to assess the loss of breaking strength in steel wire ropes weakened through wear of outer wires.
 Deterioration of steel wire ropes may have different forms. lt often includes fatigue breaks of wires, corrosion, wire abrasion, plastic deformation, or a combination of these. Each rope application is characterized by a specific wear pattern that reflects the conditions of rope service. As an example in elevator ropes, or head ropes of friction hoists, the rope deteriorates mainly through fatigue breaks of wires. ln head ropes of drum hoists the main form of deterioration is often the wear of outer rope wires, as a result of rope creep on the drum, movement of rope at cross-over points and at rope raisers, friction at flanges of head sheaves, and the like (Chaplin, 1994 ).
 This last form of deterioration is difficult to quantify using traditional visual or magnetic rope examination methods and is subject to investigations presented below.
 
Author(s): Golosinski, T.S., Tytko, A.A.