Effect of broken wire on bending fatigue characteristics of wire ropes

Zhang, Dekun; Feng, Cunao; Chen, Kai; Wang, Dagang; Ni, Xiang

doi:10.1016/j.ijfatigue.2017.06.024

Cited by 54 publications

(15 citation statements)

References 20 publications

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“…Steel wire rope is widely used in practical applications as loading and stretching with high strength and toughness in complex scenes such as the elevator, mine, and crane, which plays an important role in various engineering machinery [1,2]. However, the failure of wire rope such as becoming broken [3], corrosion [4], and wear and fatigue [5] has caused huge losses to the economy and human lives. Therefore, many nondestructive testing methods [6,7] have appeared in wire rope defect inspection, for instance, the widely used magnetic flux leakage testing method [8], metal magnetic memory, [9] and ultrasonic guided wave detection method [10].…”

Section: Introductionmentioning

confidence: 99%

Weak Signal Processing Methods Based on Improved HHT and Filtering Techniques for Steel Wire Rope

Liu

Sun

et al. 2022

Applied Sciences

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As one of the most important processes in steel wire rope inspection, defect signal processing is of great significance in guaranteeing safety and precision measurement. Aiming at the weak signal detection of steel wire rope with mixed strands and noise, a combined signal processing method based on magnetic flux leakage testing and multi-step filtering techniques are proposed in this paper. The experiments are first introduced and performed on three typical types of steel wire rope with diameters of 28 mm, 32 mm, 45 mm, and different wire broken defects detected under liftoff distances of 13 mm and 20 mm; the acquired signals are then analyzed both in time and frequency domain. According to the weak signal characterizations, the principle of the proposed methods and algorithm are given concretely. Afterwards, comparison of signal processing results between the traditional lowpass filtering, wavelet denoising, median filtering, and the proposed method are presented. Finally, the influence factors of smoothing types and moving average span of the proposed methods are investigated. The processing results of the proposed methods are shown through short-time Fourier transform and signal-to-noise ratio analysis, which not only demonstrates the validity and feasibility of the combined methods with the highest signal to noise ratio of 90.37 dB, but also exhibits a great potential of precision defect detection and practical application in steel wire rope inspection.

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Section: Introductionmentioning

confidence: 99%

Weak Signal Processing Methods Based on Improved HHT and Filtering Techniques for Steel Wire Rope

Liu

Sun

et al. 2022

Applied Sciences

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“…Zhang et al. 11–13 focused on the bending fatigue performance of the hoisting rope by using the self-made bending fatigue testing machine through non-destructive detection and proposed that the nylon pulley could significantly improve the service life of the hoisting rope. Furthermore, the distribution of the position of broken wires also had a significant impact on the remaining service life of the steel wire rope.…”

Section: Introductionmentioning

confidence: 99%

Tribo-fatigue characteristics of braided wire rope for traction under low cycle bending fatigue

Xiao

Zhang

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Braided wire rope as the traction tool is indispensable for stringing conductors in overhead transmission lines. However, rope body wear and fatigue fracture failure often lead to its premature scrap. In this paper, the bending fatigue test of YS 9-8 × 19 braided wire rope for traction was carried out by the test rig. The bending fatigue life of the braided wire rope was discussed by the number of broken wires. Furthermore, the fracture mechanism and wear morphology of the rope wires were analyzed by Ultra-depth three-dimensional microscope combined with the scanning electron microscope. The fatigue damage mechanism was discussed, and the tribo-fatigue characteristics of the wire rope were investigated. Results show that the failure of braided wire rope is the result of the interaction of cyclic bending stress and surface damage. Moreover, most broken wires occur at the place where the rope wires are severely worn. When the bending fatigue cycle is between 2.0 × 104–2.4 × 104, the number of broken wires reaches the scrap standard. Additionally, the bending tribo-fatigue damage of the wires between adjacent strands is the most serious. The primary wear mechanisms of the wires in contact with the pulley are fatigue wear and abrasive wear. In contrast, the wires between adjacent strands are affected by fatigue wear, adhesive wear, and tribo-oxidation.

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“…Mouradi et al [ 13 ] monitored the damage evolution process of 19 × 7 non-rotating wire ropes through fracture tensile tests, and defined the different stages of damage evolution of the wire rope and the critical life fraction that may lead to sudden failure. In view of the negative influence of broken wires on the mechanical properties of wire ropes, Zhang et al [ 14 ] conducted bending fatigue tests on the wire rope samples with different pre-broken wire distributions based on a self-made bending fatigue test device and found that broken wires increased the stress in the internal strands and the contact force between steel wires, thus reducing the service life of wire ropes. The friction and wear of wire ropes seriously threatens the safety and reliability of traction transmission equipment.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Tribological Properties of Lanthanum Stearate Modified Lubricating Oil for Wire Rope in a Mine Hoist

Zhang

Peng

et al. 2021

Materials

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In view of the serious friction and wear on the surface of a hoisting wire rope caused by the failure of lubrication under severe hoisting conditions, a study on the tribological characteristics of lanthanum stearate modified lubricating oil (LSMLO) was carried out. First, lanthanum stearate was prepared by the saponification reaction, and its surface morphology, chemical structure, thermal stability, and dispersion stability in IRIS-550A lubricating oil (IRIS) for wire rope were analyzed. Then, the tribological properties of LSMLO were investigated through four-ball friction tests and sliding wear tests of wire ropes. The results show that stearic acid almost completely reacts to produce lanthanum stearate, which has good thermal stability and a disordered layered structure. With the help of oleic acid, the dispersion stability of lanthanum stearate in IRIS can be significantly improved. The four-ball friction tests show that the optimal addition amount of lanthanum stearate in IRIS is 0.2 wt.%, and the CoF and wear scar diameter are reduced by about 35% and 25% respectively when lubricated with LSMLO compared to that with IRIS. LSMLO can better reduce the wear of the wire rope under different sliding speeds and contact loads than IRIS, and it exhibits improved anti-friction and anti-wear properties under high speed and low load.

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Effect of broken wire on bending fatigue characteristics of wire ropes

Cited by 54 publications

References 20 publications

Weak Signal Processing Methods Based on Improved HHT and Filtering Techniques for Steel Wire Rope

Weak Signal Processing Methods Based on Improved HHT and Filtering Techniques for Steel Wire Rope

Tribo-fatigue characteristics of braided wire rope for traction under low cycle bending fatigue

Preparation and Tribological Properties of Lanthanum Stearate Modified Lubricating Oil for Wire Rope in a Mine Hoist

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