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A kind of carbon fiber multifilament compressive strength sample preparation and testing method

A technology of compressive strength and carbon fiber, which is applied in the field of sample preparation and testing of carbon fiber multifilament compressive strength, can solve the problems of large dispersion, instability and damage, etc., and achieve the effect of small discrete value, easy operation, and improved sample preparation efficiency

Active Publication Date: 2021-11-16
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon fiber multifilament compression strength sample preparation and testing method, the sample preparation and testing method can be quickly prepared to obtain a uniform diameter of the compressed sample, which can effectively solve the instability and damage of the carbon fiber multifilament compression sample test process , large dispersion and other technical problems, the test results are stable, and it is suitable for various types of carbon fibers

Method used

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  • A kind of carbon fiber multifilament compressive strength sample preparation and testing method
  • A kind of carbon fiber multifilament compressive strength sample preparation and testing method
  • A kind of carbon fiber multifilament compressive strength sample preparation and testing method

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Effect test

Embodiment 1

[0099] Put the Toray T300-3K carbon fiber multifilament in Japan on the unwinding creel of the carbon fiber multifilament rod automatic sample preparation device, and carry out dipping, shaping, heating and curing at a certain traction tension and speed, and the composition of the glue solution is 100 parts by mass Diglycidyl phthalate, 60 parts by mass of tetrahydrophthalic anhydride, 1 part by mass of N,N-dimethylbenzylamine and 100 parts of acetone, the curing temperature is 140 ° C, the curing time is 4 hours, and the diameter is cut after cooling It is a 0.7mm multifilament rod; place the multifilament rod in the sample preparation device for the compression sample resin reinforcement sheet, inject glue, cure, demould, and trim to obtain a 1mm test section of carbon fiber multifilament compression sample, and the resin reinforcement sheet is J -22 resin, the curing temperature is 40°C, and the curing time is 2h; the compression sample is installed in the compression test f...

Embodiment 2

[0101] Put the domestic T300-3K carbon fiber multifilament on the unwinding creel of the carbon fiber multifilament rod automatic sample preparation device, and carry out dipping, shaping, heating and curing at a certain traction tension and speed, and the composition of the glue is 100 parts by mass of phthalate Diglycidyl formate, 60 parts by mass of tetrahydrophthalic anhydride, 1 part by mass of N,N-dimethylbenzylamine and 100 parts of acetone, the curing temperature is 140 ° C, the curing time is 4 hours, and the diameter is cut after cooling to 0.7 mm multifilament rod; place the multifilament rod in the sample preparation device for the resin reinforcement sheet of the compressed sample, inject glue, cure, demould, and trim to obtain a 1mm test section of carbon fiber multifilament compression sample, and the resin reinforcement sheet is J-22 Resin, the curing temperature is 40°C, and the curing time is 2h; the compression sample is installed in the compression test fixt...

Embodiment 3

[0103]Place the Japanese Toray T700-12K carbon fiber multifilament on the unwinding creel of the carbon fiber multifilament rod automatic sample preparation device, and carry out dipping, shaping, and heating and curing at a certain traction tension and speed. The composition of the glue solution is 100 parts by mass 3 , methyl 4-epoxycyclohexanecarboxylate, 40 parts by mass of methyl hexahydrophthalic anhydride, 2 parts by mass of 2,4,6-tris(dimethylaminomethyl)phenol and 80 parts of toluene, curing temperature 160°C, curing time 2h, after cooling, cut out a multifilament rod with a diameter of 1.2mm; place the multifilament rod in a compression strength sample preparation device, inject glue, cure, demould, and trim to obtain a carbon fiber multifilament with a test section of 2mm The compression sample, the resin reinforcement sheet is 914 resin, the curing temperature is 50 ° C, and the curing time is 2 hours; the compression sample is installed in the compression test fixt...

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Abstract

The invention belongs to the technical field of material performance testing, in particular to a carbon fiber multifilament compressive strength sample preparation and testing method. The carbon fiber multifilament rod prepared by the invention has a smooth and uniform appearance, the sample diameter and resin content can be designed, and can be used for sample preparation of compression properties of various types of carbon fibers; value is small. The sample preparation and testing method of the invention has an important prospect of popularization and application in the development and production of domestic high-performance carbon fibers and their composite materials.

Description

technical field [0001] The invention belongs to the technical field of material performance testing, and in particular relates to a carbon fiber multifilament compression strength sample preparation and testing method. Background technique [0002] Carbon fiber composites are widely used in load-bearing structures due to their excellent properties such as low density and high modulus strength. Objective and accurate testing of carbon fiber mechanical properties is a very important content in quality evaluation, which affects the design and use of carbon fiber composite materials. [0003] At present, the evaluation of mechanical properties of carbon fibers is mainly based on tensile properties, and engineering applications usually use the method of stretching carbon fiber multifilaments. The national standard GB / T3362-2005 carbon fiber multifilament tensile performance test method has clear regulations and descriptions on the method of manual dipping of carbon fiber to be t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N3/08
CPCG01N1/28G01N3/08G01N2203/0019
Inventor 朱世鹏杨云华冯志海张灏李龙潘月秀
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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