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Carbon fiber multifilament compression strength sample preparation and test method

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

Active Publication Date: 2019-04-26
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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  • Carbon fiber multifilament compression strength sample preparation and test method
  • Carbon fiber multifilament compression strength sample preparation and test method
  • Carbon fiber multifilament compression strength sample preparation and test method

Examples

Experimental program
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Effect test

Embodiment 1

[0099] Place the Toray T300-3K carbon fiber multifilament on the unwinding creel of the automatic sample preparation device of carbon fiber multifilament rod, and perform dipping, shaping, and heating curing at a certain traction tension and speed. The glue composition 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, curing temperature is 140°C, curing time 4h, and cutting to obtain the diameter after cooling It is a 0.7mm multifilament rod; the multifilament rod is placed in the compressed sample resin reinforcement sheet sample preparation device, glued, cured, demolded, and trimmed to obtain a 1mm test section of carbon fiber multifilament compression specimen. The resin reinforcement sheet is J -22 resin, curing temperature is 40℃, curing time is 2h; the compressed sample is installed in the compression test fixture, and the compression test is carried out at a lo...

Embodiment 2

[0101] The domestic T300-3K carbon fiber multifilament is placed on the unwinding creel of the automatic sample preparation device of carbon fiber multifilament rod, and the glue is dipped, shaped, and heated and cured at a certain traction tension and speed. The glue composition 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, curing temperature is 140°C, curing time is 4h, and the diameter is 0.7 after cooling. mm multifilament rod; the multifilament rod is placed in the compressed sample resin reinforcement sheet sample preparation device, glued, cured, demolded, and trimmed to obtain a 1mm test section of carbon fiber multifilament compression specimen. The resin reinforcement sheet is J-22 Resin, curing temperature is 40℃, curing time is 2h; the compressed sample is installed in the compression test fixture, and the compression test is performed at a lo...

Embodiment 3

[0103] Place the Toray T700-12K carbon fiber multifilament on the unwinding creel of the automatic sample preparation device for carbon fiber multifilament rods, and perform dipping, shaping, and heating curing at a certain traction tension and speed. The glue composition is 100 parts by mass 3 ,4-epoxycyclohexanecarboxylic acid methyl ester, 40 parts by mass methylhexahydrophthalic anhydride, 2 parts by mass 2,4,6-tris(dimethylaminomethyl)phenol and 80 parts toluene, curing temperature The temperature is 160℃, the curing time is 2h, and the multifilament rod is cut after cooling to obtain a 1.2mm diameter multifilament rod; the multifilament rod is placed in the compressive strength sample preparation device, and the carbon fiber multifilament of 2mm test section is obtained by injecting, curing, demolding and trimming Compress the sample, the resin reinforcement sheet is 914 resin, the curing temperature is 50℃, and the curing time is 2h; the compressed sample is installed in ...

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Abstract

The invention belongs to the technical field of material property testing, and particularly relates to a carbon fiber multifilament compression strength sample preparation and test method. According to the method, a prepared carbon fiber multifilament rod is smooth and uniform in appearance, the diameter and the resin content of a test sample can be designed, and the method can be used for compression performance sample preparation of various types of carbon fibers; the compression test process is easy to operate, the mechanical properties of the fibers can be objectively evaluated through a compression test result, and the discrete value is small. The sample preparation and test method has important application and popularization prospects in the development and production of domestic high-performance carbon fibers and composite materials thereof.

Description

Technical field [0001] The invention belongs to the technical field of material performance testing, and specifically relates to a sample preparation and testing method for the compressive strength of carbon fiber multifilament. Background technique [0002] Carbon fiber composite materials are widely used in load-bearing structures due to their excellent characteristics 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 carbon fiber mechanical properties is mainly based on tensile properties, and the method of carbon fiber multifilament drawing is usually used in engineering applications. The national standard GB / T3362-2005 carbon fiber multifilament tensile performance test method has clear regulations and descriptions for the manual dipping method of carbon...

Claims

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Application Information

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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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