Galvanized steel wire rope stretching, distortion, vibration and other influencing factors
The galvanized steel wire rope of the fatigued elevator car will stretch, distort and vibrate before and after the starting and braking system. The galvanized steel wire rope bears the load before and after, and is distorted and vibrated, which will cause brittle fracture.
In addition, the galvanized steel wire rope is often subject to distortion and vibration, which also causes fatigue.
Under the effect of the transformed in-situ stress, the galvanized steel wire rope just started to produce original cracks due to displacement, etc., and then the basic principle of early fatigue damage of the cracks was continuously reversed under the action of the in-situ stress, which promoted the cracks to expand until they broke. The galvanized steel wire rope with Z-terminal fracture is broken at the same time, most of which are on the stainless steel wire on the surface. Excessive fatigue damage will accelerate the pulling and rupture of the galvanized steel wire rope.
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