Distributed carbon fiber reinforcement, preparation method and strain determination method

Abstract

The invention discloses a distributed carbon fiber bar and a preparation method and a strain determination method thereof. A manufacture method of the carbon fiber bar comprises the following steps: (1), stirring well 30-60 parts by weight of epoxy resin, 10-20 parts by weight of a curing agent, 30-60 parts by part of conductive powder and 10-20 parts by weight of a diluent at normal temperature of 10-40 DEG C to obtain mixture A; (2), infiltrating carbon fibers in the direction of filaments in the mixture A, and taking out the carbon fibers after full infiltration; (3), passing carbon fiber bar material through copper sleeves at certain intervals along its radial direction, and leading out with a guide line; (4), placing the carbon fiber bar material in a mold, and curing under standard conditions for two days; (5), demolding after the carbon fibers solidify to obtain a carbon fiber sensor. The method of the invention is simple, convenient to use and widely applicable.

Description

technical field [0001] The invention belongs to the field of structural health monitoring, in particular to a distributed carbon fiber reinforcement, a preparation method and a strain determination method. Background technique [0002] Carbon fiber has a series of advantages such as low density, high strength, high modulus, corrosion resistance, high temperature resistance, low temperature resistance, and fatigue resistance, and is known as the "king of new materials". As the price of carbon fiber decreases, the use of carbon fiber is becoming more and more widespread, especially in the civil construction industry. However, carbon fiber is a brittle material. When it is damaged, it often breaks suddenly and leads to vicious events such as the collapse of structures, endangering the property and life safety of the general public. [0003] Since carbon fiber is a new material, there is currently no dedicated monitoring method. At present, the main monitoring methods in civil...

AI Technical Summary

Problems solved by technology

However, these methods have certain limitations, such as the high price of optical fibers and their fragility, and the fact that the strain gauges are not laborious to stick on the ribs. The traditional monitoring methods have the characteristics of offline, low precision, poor stability, and high cost.

Current monitoring methods are difficult to effectively measure the stress state of carbon fiber reinforcement

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