Aging life evaluation method for carbon-fiber composite core wire

Abstract

The invention provides an aging life evaluation method for a carbon-fiber composite core wire.The method comprises the following steps that 1, shift processing is conducted on creep test data of the composite core wire on the basis of a time-temperature equivalence principle, and a corresponding time-temperature shift factor is obtained; 2, shift processing is conducted on a test result obtained in the first step on the basis of a time-stress equivalence principle, and a corresponding time-stress shift factor is obtained; 3, the carbon-fiber composite core wire is evaluated by means of a time-temperature-stress equivalence principle; 4, fitting is conducted on an obtained creep strain master curve by means of an improved Findley model.According to the aging life evaluation method for the carbon-fiber composite core wire, influences of temperature and stress on wire creep behaviors in the practical use process of the novel carbon-fiber composite core wire are considered overall, and the aging life evaluation method can be well applied to service life prediction of the novel carbon-fiber composite core wire.

Description

【Technical field】 [0001] The invention relates to a method for evaluating the aging life of a carbon fiber composite core wire. It belongs to the fields of reliability engineering and life evaluation. 【Background technique】 [0002] Carbon Fiber Composite Core Conductor (ACCC) is made of highly conductive annealed aluminum wire stranded on a carbon fiber composite core. This new type of conductor has the characteristics of high strength, light weight and low sag. High-voltage overhead conductors have broad application prospects. Among them, the carbon fiber composite core is the key load-bearing part of the wire. Although the carbon fiber composite core has significant advantages in short-term mechanical and thermal properties, it will be affected by environmental factors such as humidity and heat in actual operation, and the weight of the wire and wind vibration will also affect the composite wire. The core produces a certain load effect, and the composite core must produ...

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Problems solved by technology

Among them, the carbon fiber composite core is the key bearing part of the wire. Although the carbon fiber composite core has significant advantages in short-term mechanical and thermal properties, it will be affected by environmental factors such as humidity and heat in actual operation, and the weight of the wire and wind vibration will also affect the composite wire. The core produces a certain load effect, and the composite core must produce creep behavior under long-term high temperature and high load

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