Abstract
As the key bearing components in engineering projects, wire ropes often suffer from high-speed impact loads in service. In the majority of applications, wire ropes are subjected to the loads with the following characteristics: alternating impact loads, short-time overload, and small movements among adjacent spiral strands. Typical failure modes of wire ropes include fracture, wear, corrosion, geometric failure and thermal failure. In this work, the corresponding failure mechanisms were analyzed. For a certain type of wire ropes, the fracture morphology, surface quality, microstructure and internal defects of steel wires were analyzed, and failure causes were discussed. Accordingly, the precautions in relation to the safe use of wire ropes were proposed.
Highlights
Wire ropes are widely used in many industrial fields because of their large bearing capacity, good flexibility and smooth motions without noise
In addition to the cargo weight, rope self-weight and other static loads, wire ropes bear the dynamic loads caused by impacts and the acceleration of movements, the additional load caused by bending, and the resistance load caused by friction, etc
The sharp acceleration, deceleration and emergency braking should be avoided during the use of wire ropes
Summary
Wire ropes are widely used in many industrial fields because of their large bearing capacity, good flexibility and smooth motions without noise. They tend to degrade due to a range of factors including environmental corrosion, uncertain alternating loads, mechanical impacts, wear and high-speed impact stress, resulting in wear, corrosion and wire fracture, decreased strength. With the reduction of strength, wire ropes may suddenly break, inducing security incidents such as production pauses and even casualties. Conducting the failure analysis of wire rope is of vital significance on both safety and economy in production
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