Sample making method for carbon fiber interlayer shearing strength test, and special die therefor

Abstract

The invention provides a sample making method for carbon fiber interlayer shearing strength test, and a special die therefor. The method comprises the following steps: brushing carbon fiber filament bundles with an epoxy resin, putting the obtained carbon fiber filament bundles in the die, carrying out baking curing, and cooling to complete a sample making operation. The method has the advantages of simplicity and easy operation of the sample making operation, substantial shortening of the time of manual work, and realization of the balanced distribution of the carbon fiber filament bundles in the obtained sample. The die comprises a pedestal, a piston and a C-shaped clamp; the upper end surface of the pedestal is provided with a groove penetrating through the front and back sides of the pedestal, the piston is formed by an upper cover arranged at the upper portion and a boss having a lower end aligned with a pedestal groove, the height of the boss is smaller than the depth of the pedestal groove, and the C-shaped clamp fixes the pedestal and the piston which are installed in a fit mode. The die completely accords with the demands of the method, has a simple structure and is convenient to process.

Description

technical field [0001] The invention relates to a sample preparation method for the carbon fiber interlayer shear strength test, and also relates to a special mold for the sample preparation method for the carbon fiber interlayer shear strength test. Background technique [0002] Carbon fiber is a new type of high-performance fiber material with a carbon content of more than 92%. It has many excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, electrical conductivity, thermal conductivity and far-infrared radiation. , widely used in aerospace, military defense, sports equipment and industrial fields, is an important strategic basic material of the country. [0003] As a brittle material, carbon fiber is rarely used alone, and is mostly combined with epoxy resin to make composite materials to give full play to its excellent performance. The interlayer shear strength of carbon fiber ...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used sample preparation method process is as follows: first put the carbon fiber tow into the dipping tank through the wire release roller, and then wind the roller to make a unidirectional prepreg cloth. After the prepreg cloth is dried, it is cut, laminated and heated. Pressing to make a flat plate, and then machining to make a sample. It takes more than 10 hours to complete the whole process. Not only is the process long and complicated, but the prepared sample is prone to uneven glue content.

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