Method and device for estimating fatigue life of industrial pure aluminum wire

Abstract

The invention discloses a method and a device for estimating the fatigue life of an industrial pure aluminum wire. The method comprises the steps of: intercepting a fatigue fracture sample from an industrial pure aluminum wire to be measured; acquiring a first cross sectional area of the industrial pure aluminum wire to be measured; determining a first crack propagation region of the fatigue fracture of the industrial pure aluminum wire to be measured, and counting the area of the first crack propagation region; and estimating the fatigue life of the industrial pure aluminum wire to be measured according to the proportion of the area of the first crack propagation region in the first cross sectional area and the function relationship between the proportion of the area of the crack propagation region in the first cross sectional area and the fatigue life. According to the method, the fatigue life of the industrial pure aluminum wire can be quickly estimated, the fatigue performance of different industrial pure aluminum wires can be judged, and the method is simple to operate and beneficial to popularization.

Description

technical field [0001] The invention relates to the field of industrial pure aluminum wires for overhead power transmission, in particular to a method and a device for estimating the fatigue life of industrial pure aluminum wires. Background technique [0002] The overhead wire is the necessary carrier for the power transmission from the power generation end to the power receiving end in the long-distance transmission line, and it is also the most important component unit in the long-distance transmission line. Aluminum is an important conductor material in the field of long-distance power transmission. For example, aluminum and aluminum alloy wires are used in steel-cored aluminum stranded wires, aluminum alloy-cored aluminum stranded wires and all-aluminum alloy stranded wires. [0003] Because the overhead transmission wire is exposed to the natural environment for a long time, it must withstand environmental influences such as wind blowing, rain and snow coverage, which ...

AI Technical Summary

Problems solved by technology

Usually the aluminum stranded wire for overhead power transmission is made of 30-40 strands of aluminum monofilament. After the aluminum stranded wire fatigues and breaks, it is difficult to predict the fatigue life of the aluminum wire, and it is difficult to judge the fatigue life difference of each single-strand aluminum wire. Failure Analysis of Stranded Wires Brings Difficulties

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