Investigating the Lifetime of Fibre Ropes

Steel wire ropes have established as transmission, connection and safety elements in transporters such as cranes and elevators, due to their high breaking strength and operational safety as well as out of many years of experience. However, steel wire ropes have disadvantages such as high dead weight, high bending stiffness and sensitivity to corrosion. Increasing requirements on the energy-efficient and resource-saving operation of technical systems demand new materials, technologies and processes. As a result, textile machine elements like HM-HT fibre ropes (high modulus, high tenacity) come into focus of considerations. The aim of the research is to expand the level of knowledge with regard to the state of wear and aging. Another aim is to find out the influencing factors on the lifetime, discard criteria of high-strength fibre ropes and to derive methods for lifetime detection.

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Failure Analysis of High-Strength Fiber Ropes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.825-826.891 ◽

2015 ◽

Vol 825-826 ◽

pp. 891-898 ◽

Cited By ~ 2

Author(s):

Annett Schmieder ◽

Thorsten Heinze ◽

Markus Michael

Keyword(s):

New Technologies ◽

Wear Behavior ◽

Steel Wire ◽

High Strength ◽

Computer Assisted ◽

Dead Weight ◽

Wire Ropes ◽

Computer Assisted Tomography ◽

High Strength Fiber ◽

Tension Members

Until the present days, in discontinuous conveyor systems, e.g. cranes and elevators, steel wire ropes and steel chains are the exclusively used tension members. Nevertheless, these tension members are exhibiting essential disadvantages, e.g. high dead weight, low bending flexure and high susceptibility to corrosion. For fulfilling the steadily increasing requirements especially in running ropes, alternative tension members have to be developed and approved concerning their series-production readiness by utilization of new technologies and new materials. High-strength fiber ropes are demonstrating promising mechanical properties, regarding tensile strength, vibration behavior and bending fatigue life. Still, the application of such high-strength fiber ropes is limited, due to unavailable systematic investigations and insufficient guidelines for dimensioning and processes for determination of discard criteria. With the help of new technologies and procedures, e.g. multi-zone cyclic bend-over-sheave (CBOS) test machinery and computer-assisted tomography, new knowledge concerning the wear behavior of fiber ropes is to be gained and new discard criteria are to be developed.

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Impact of Strain Aging Kinetics on the Failure of Thin Steel Wire Ropes

Materials Proceedings ◽

10.3390/iec2m-09243 ◽

2021 ◽

Vol 3 (1) ◽

pp. 12

Author(s):

Tamás Bálint Mező ◽

Péter Barkóczy

Keyword(s):

Carbon Steel ◽

Strain Aging ◽

Steel Wire ◽

High Carbon Steel ◽

High Strength ◽

Aging Effect ◽

Wire Ropes ◽

Steel Wires ◽

Thin Carbon ◽

Kinetics Of

Under quasi-static loading an irregular failure mode of high-strength thin-carbon steel cords were observed after low temperature thermal aging. Character and kinetics of damage in such wire ropes highly depend on the plastic elongation of the steel wires, which is significantly modified by the strain aging effect. In this paper, the static strain aging effect on heavily drawn high-carbon steel wires and their cords is experimentally studied in the 100–200 °C temperature range. Quantitative analysis of the affected strength and strain parameters is given. Kinetics of the aging process is discussed, and based on this, the macroscopic failure mechanism is fundamentally explained.

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