First of all, the first point is that the fatigue cracks of the steel wire rope spread out from the source point in the form of a series of concentric rings. If the wire drawn on the fatigue wire is low, the area affected by fatigue is very large before the wire fails.
Secondly, the second point is that the fatigue origin of the steel wire rope and the small, severely worn fatigue crack with fatigue fracture lines that expand in a concentric manner clearly shows a fatigue crack.
The third point is two adjacent fatigue cracks. If the steel wire is subjected to local bending and extrusion, this kind of steel wire failure phenomenon will often see bending fatigue and broken wire. The steel wire has fatigue in the torsion and bending test, and cracks begin to appear in various situations.
Fourth, fatigue occurs under the influence of crack pressure, and the surface shows secondary deformation caused by the pressure.
Fifth, the wire breaks due to bending fatigue on the steel wire rope made of compacted outer strands. The distribution of bending fatigue broken wires is generally random.
Sixth, the severely worn wire rope with some fatigue broken wires. Due to the twisting of the wire rope, the ends of the broken wires shift to different directions.
Seventh, the wire rope showed basically no wear and tear, but there were a lot of fatigue and broken wires.
Eighth point, three adjacent strands have fatigue broken wires, and surface corrosion often triggers the formation of fatigue cracks.
Finally, the ninth point is that pitting and rust are associated with fatigue cracks. Bending fatigue breaks, and fatigue cracks begin to appear at the point where it contacts the crown wheel. The crack obviously expands concentrically to its starting point, and the crack becomes obvious only after the wire rope strand undergoes a tensile failure test.