The determination of the stresses in the wire of steel wire rope at clash on the blocks and drums

Anchor chocks are used in the sport of rock climbing for providing secure attachment to a rock face. They are used at regular intervals and must be light weight (since many are carried) and also sufficiently strong to withstand an impact force should a climber fall from a height. In chock design, steel wire cable is widely used for connecting the nut component, which is wedged into a rock crevice, to the free end which attaches, via a karabiner link, to the safety rope. However, the wire cable is vulnerable to failure as it can fray with use at exposed ends - especially when folded into a loop using tight bends. Also, the ferrule end connections are considered a potential design weakness. In a research programme tests have been carried out on new and also some well used anchor chocks and has revealed very different, and some unpredicted, failure modes – depending on the state of the wire rope and whether the applied load at failure was static or impact. This paper presents the results of test failures for a range of chocks and discusses the benefits of using single lengths of wire cable with suitably swaged end ferrules.

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The determination of the stresses in the wire of steel wire rope at clash on the block

Bulletin of Kharkov National Automobile and Highway University ◽

10.30977/bul.2219-5548.2021.92.1.184 ◽

2021 ◽

Vol 1 (92) ◽

pp. 184

Author(s):

Nataliia Fidrovska ◽

Andrii Lomakin ◽

Serhii Khursenko ◽

Viktoriia Nesterenko

Keyword(s):

Considerable Increase ◽

Steel Wire ◽

Tensile Force ◽

Point Contact ◽

Considerable Influence ◽

Compression Force ◽

Method Of Calculation ◽

Extra Effort ◽

The Wire

The article considers the problem of determining the extra effort that occurs when the steel weir rope runsng and the bend on the block. In spite of that what questions of determining the strain in ropes of carrying machines dedicate very many of works different sciences to our time no definition method of calculation of additional strains of bend in rope in the time of bend on block. For define overall increase of length wire obtain at cover of rope on the block was examine site of rope from its point contact since block to exceed widen of elongation in side of straight rope. On transition site the rope have certain curvature which is small value in comparison since curvature rope at increase additional effort on transition site not create important influence. On this score extend additional effort on transition site examine however for the straight rope. On value overall increase of the length wire transition site can have considerable influence because on this site the wire can have considerable increase of the length which summarize with value elongation receipt widen which is in rope curve on block. Although the question of defining the forces of the ropes of Considered steel weir rope element, which goes from a straight section to the curved on the block is a subject of very many works. In this case there arise tensile force (or compression force), which leads to the destruction of weirs of the steel weir rope. The proposed new calculation, which is based on the classical theory, namely Hooke's law. A comparison of the calculated values with the experimental ones is made.

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Nonlinear isolation performance of 6 × 19 wire rope of different lengths under compression

Advances in Mechanical Engineering ◽

10.1177/16878140211028058 ◽

2021 ◽

Vol 13 (6) ◽

pp. 168781402110280

Author(s):

Genlin Mo ◽

Jing Liu ◽

Yongxi Jin ◽

Wenmin Yan

Keyword(s):

Hysteresis Loop ◽

Vibration Amplitude ◽

Steel Wire ◽

Damping Ratio ◽

Excitation Amplitude ◽

Wire Rope ◽

Equivalent Damping ◽

Wire Rope Isolator ◽

The Wire ◽

Isolation Performance

Stainless steel wire rope isolator is widely used in engineering. To optimize design of the isolator, loading, and unloading characteristics of the 6 × 19 6 mm wire rope under compression are investigated. Ropes of different lengths are tested to get the force-displacement relations. The stiffness, the equivalent damping ratio, and the hysteresis loop of the wire rope are derived. The stiffness decreases with both the length of the rope and the vibration amplitude. It has an approximate linear relationship with the reciprocal of length and amplitude. The equivalent damping ratio has an approximate quadratic relationship with the reciprocal of length and amplitude. The hysteresis loop of the wire rope is described using the proposed quadrilateral model. The loading stage is found to be determined by the length of the rope. The unloading stage is influenced by both the vibration amplitude and the length of the rope. Influences of the excitation amplitude and the frequency on the isolation performance for both steady-state vibration and transient impact vibration are revealed based on the models. The work would help engineers to design the isolators and predict responses of the structures.

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Investigation on Bending over Sheave Fatigue Life Determination of Rotation Resistant Steel Wire Rope

Experimental Techniques ◽

10.1007/s40799-017-0188-z ◽

2017 ◽

Vol 41 (5) ◽

pp. 475-482 ◽

Cited By ~ 8

Author(s):

Y.A. Onur ◽

C.E. İmrak ◽

T.Ö. Onur

Keyword(s):

Fatigue Life ◽

Steel Wire ◽

Wire Rope ◽

Resistant Steel

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Determination of steel wire rope parameters affecting the safety of operation

Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal ◽

10.21440/0536-1028-2019-6-118-123 ◽

2019 ◽

pp. 118-123

Author(s):

Poliakov Sergei V. ◽

Keyword(s):

Steel Wire ◽

Wire Rope

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Determination of Elastic Modulus of Steel Wire Ropes for Computer Simulation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.683.22 ◽

2014 ◽

Vol 683 ◽

pp. 22-27 ◽

Cited By ~ 1

Author(s):

Ján Boroška ◽

Alena Pauliková ◽

Vladimír Ivančo

Keyword(s):

Computer Simulation ◽

Elastic Modulus ◽

Influencing Factors ◽

Modulus Of Elasticity ◽

Steel Wire ◽

Wire Rope ◽

Wire Ropes ◽

Real Value ◽

Construction Type

Modulus of elasticity of steel wire rope (elastic modulus) is a characteristic value, which is important not only for users of the steel rope, but also for designers of machines and machinery that are equipped with the steel wire rope. Values of the elastic modulus depends predominately on the elastic modulus of the material, which the rope is manufactured from as well as it depends on the various other factors. The most important influencing factors are as follows: rope construction, type of core, angle and way of wire stranding, angle and way of rope lay as well as kind of lubricant. The real value of the elastic modulus has also impact on prolongation of the steel wire rope and on intensity of its dynamical loading. The rope elastic modulus value can be determined by means of the various methods. There are analysed in this article such methods for determination of the rope elastic modulus, which can be applied for a computer simulation.

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A Sensor for Broken Wire Detection of Steel Wire Ropes Based on the Magnetic Concentrating Principle

Sensors ◽

10.3390/s19173763 ◽

2019 ◽

Vol 19 (17) ◽

pp. 3763 ◽

Cited By ~ 3

Author(s):

Zhang ◽

Jing ◽

Xu ◽

Zhan ◽

Tan

Keyword(s):

Permanent Magnet ◽

Structural Parameters ◽

Steel Wire ◽

Sensor Arrays ◽

Wire Rope ◽

Hall Sensor ◽

Wire Ropes ◽

Depth Analysis ◽

The Wire ◽

Lift Off

Electromagnetic testing is the most widely used technique for the inspection of steel wire ropes. As one of the electromagnetic detecting approaches, the magnetic flux leakage (MFL) method has the best effect for the detection of broken wires. However, existing sensors based on MFL method still have some problems. (1) The size of the permanent magnet exciter is usually designed according to experience or rough calculation, and there is not enough depth analysis for its excitation performance; (2) Since the detectable angular range for a single Hall component is limited, Hall sensor arrays are often employed in the design of MFL sensors, which will increase the complexity of the subsequent signal processing due to the extensive use of Hall components; (3) Although the new magneto-resistance sensor has higher sensitivity, it is difficult to be applied in practice because of the requirement of the micron-level lift-off. To solve these problems, a sensor for the detection of broken wires of steel wire ropes based on the principle of magnetic concentration is developed. A circumferential multi-circuit permanent magnet exciter (CMPME) is employed to magnetize the wire rope to saturation. The traditional Hall sensor array is replaced by a magnetic concentrator to collect MFL. The structural parameters of the CMPME are optimized and the performance of the magnetic concentrator is analyzed by the finite element method. Finally, the effectiveness of the designed sensor is verified by wire breaking experiment. 1–5 external broken wires, handcrafted on the wire rope with a diameter of 24 mm, can be clearly identified, which shows great potential for the inspection of steel wire ropes.

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PENGARUH CAIRAN ALUMINIZING TERHADAP KEKERASAN KAWAT BAJA

JTT (Jurnal Teknologi Terapan) ◽

10.31884/jtt.v3i2.56 ◽

2017 ◽

Vol 3 (2) ◽

Author(s):

Dwi Putranto N ◽

Dody Prayitno

Keyword(s):

Room Temperature ◽

Steel Wire ◽

Intermetallic Layer ◽

Hardness Test ◽

Wire Rope ◽

Heavy Load ◽

Steel Wires ◽

The Wire ◽

Wire Strand ◽

The Impact

Wire rope is made from several steel wires a combined form a strand, a couple of strands twisted around the core to form a steel rope. One example of its usage is on the bridge to provide support for a heavy load. The steel wire is composed of several parts that is, steel wire, core and wire strand. Increasing the hardness of steel wire have the impact, the hardness of the steel wire. In an effort to improve the hardness of steel wire, there are opportunities to increase the hardness of steel wire with aluminizing method. The aim of this research is to find out the hardness of Wire in aluminizing process with alloys Al - Cu - Sn. Moreover to the research also aims to focus on the addition of Sn element in Al - Cu liquid. The methodology research was preceded by spliting wires from the wire rope. After that cut the wire into the sample wire. Then soak the wire into Al - Cu – Sn liquid at a temperature of 700ºC for ± 3 minutes. Elements of Sn which contained in the composition of Al - Cu - Sn vary from 0 % , 10 % and 20 % , while for CU’s component is 10 % and the rest of is Al, and the latter only elements of Al - Sn, without adding Cu element. Wire samples were then take away and cooled at room temperature, then test the wire by using micro hardness test, the test data was analyzed with Anova and finally made a conclusion. The results of this of this research showed that for the violence that occurs in the intermetallic layer shows the increase in value of hardness obtained on steel wire.

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