An Experimental Research Method for Wire Rope Failure

Abstract

The invention relates to an experiment research method for the failure of a steel wire rope. The experiment research method is characterized in that a steel wire rope magnetic nondestructive testing probe is circularly arranged at the periphery of a steel wire sample, and a non-magnetic wedge block is fixed in the steel wire rope magnetic nondestructive testing probe; a transverse force applier is correspondingly arranged on the inner wall of the steel wire rope magnetic nondestructive testing probe to apply a transverse force; stretching instruments for stretching, bending and distorting stress are arranged at two end heads of the steel wire sample; the stretched, bent and distorted alternating pulling stress is axially applied to the steel wire sample; an applied load periodically changes in a breaking load range of 20-40% according to a certain frequency, meanwhile, the transverse force is applied to a steel wire by the transverse force applier, and the changes of a magnetic field are measured by the steel wire rope magnetic nondestructive testing probe in the whole process until the steel wire sample is broken. According to the experiment research method, a single-wire experiment method is utilized, and the damage process of the steel wire is continuously measured, so that the interference is reduced, and the experimental reliability is improved.

Description

technical field [0001] The invention relates to a research method for steel wire rope failure, in particular to an experimental method for researching steel wire rope failure based on simulating an actual engineering system and its working conditions. technical background [0002] Steel wire rope and steel cable are important tools for lifting, pulling and keeping tension. Wire ropes and cables are in most cases critical load-carrying members, subject to tensile, bending, torsion, contact stresses, and fatigue and wear from these stresses. Corrosion caused by the environment, overload caused by improper human operation, mechanical damage, etc. are also important reasons and mechanisms for the failure of steel wire ropes and cables. Especially in coal mines, the working environment is harsh, and steel wire ropes and cables are the link between the ground and underground personnel, equipment and material lifting. Since the steel wire rope came out and used in Germany in 1834...

AI Technical Summary

Problems solved by technology

The wear and tear of the wire rope caused a huge loss of life and property

[0003] In the prior art, the research methods for the damage and failure of the steel wire rope, the factors affecting the service life, and the literature reports of the equipment have not been obtained, and most of them analyze the broken steel wire rope to infer the cause of the failure. Accurate results obtained by experimentally simulating various factors and conditions such as tension, bending, torsion, and compression of the wire rope under stress

Most of the research methods use the whole steel wire rope as the sample, and the magnetic detection research on the steel wire rope in a static and unstressed state contains many influencing factors, thus reducing the reliability of the study on the failure of the steel wire rope

[0004] In the prior art, the publication number is CN102323144A, which discloses a "wire rope tensile fixture and its horizontal steel wire rope tensile testing machine". and other working conditions, it is not perfect for the study of the failure mechanism of the wire rope

There is also a publication number CN2676181 disclosing a "steel rope and pulley test fatigue device", which is a device for studying the fatigue performance of the steel wire rope and the pulley combination, and cannot simulate the failure mechanism of the steel rope alone

[0005] The prior art reported above is only a device for carrying out fatigue performance tensile tests on steel wire ropes, and the method also adopts the method of magnetic detection. Therefore, the discussion on the damage and failure of steel wire ropes and the factors affecting the service life have not been substantial. Theoretical and technological breakthroughs

Images