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GB/T 3365-2008Carbon fiber reinforced plastics - Determination of void content and fiber volume content (English PDF)

碳纤维增强塑料孔隙含量和纤维体积含量试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 30, 2008

Implementation date

April 1, 2009

Scope

GB/T 3365-2008 is the English-translated version of 碳纤维增强塑料孔隙含量和纤维体积含量试验方法.

GB/T 3365-2008 fixes the principle, the test materials, the test equipment, the specimens, the test conditions, the test procedure, the calculation, the test results and the test report for determining the void content and the fibre volume content of carbon fibre reinforced plastics.

Clause 1 applies the method to unidirectional, orthogonal and multidirectional carbon fibre reinforced plastic laminates, states that aramid and glass fibre reinforced plastics may also be tested by reference to it, and excludes its use for determining the fibre volume fraction of fabric reinforced plastics.

Clause 3 gives the two principles separately: the void content is the percentage of the total pore area over the whole cross-section of the specimen, measured with an optical microscope, an image analyser or transparent graph paper, and the fibre volume content is the percentage of the observed area occupied by the fibres, measured with an optical microscope or an image analyser.

Clause 4 lists the consumables the test needs, among them the embedding material, abrasive papers in grades 320, 400, 600 and 800, velvet or woollen polishing cloth, synthetic diamond polishing paste, photographic equipment and a counting grid film.

Clause 5 lists the equipment, with a reflecting microscope fitted with an eyepiece grid and micrometer, an image analyser and grinding and polishing equipment for the void content, and for the fibre volume content an image analysis system with quantitative measurement software and data processing together with a microscope able to magnify more than 1200 times.

The foreword records what changed with this edition: the two earlier standards were merged into one, normative references were added, the principle of the void content test was revised, ultrasonic cleaning equipment is no longer required, and a clause on test environment conditions was introduced; GB/T 1446 is cited as a normative reference.

The standard was proposed by the China Building Materials Federation, falls under the national fibre reinforced plastics standardization technical committee, and was drafted with the participation of a Beijing glass composites company and the Beijing Institute of Aeronautical Materials.

It replaces GB/T 3365-1982 and GB/T 3366-1996, was issued on 30 June 2008 and has applied since 1 April 2009.

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Document preview — GB/T 3365-2008

National Standard of the People's Republic of China

ICS: 83.120
Classification: Q 23
Replacing: GB/T 3366-1996

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Principle
4 Test material
5 Test Equipment

Foreword

This standard also replace the GB/T 3365-1982 "carbon fiber reinforced plastic void content test method (microscopy)" and GB/T 3366-1996 "Test method for plastic fiber volume content of carbon fiber reinforced." This standard and GB /3365-1982 and GB/T 3366-1996 compared to major changes in T as follows.

--- The GB/T 3365-1982 and GB/T 3366-1996 merged into one standard;

--- Increase Normative references (see Chapter 2);

--- Modifications void content test principle (GB/T 3365-1982 in Chapter 1, the standard 3.1);

--- Ultrasonic cleaning equipment is not required test (GB/T 3365-1982 in 3.1.4, 6.2.3 of this standard);

--- Increase test environment condition contents (see Chapter 7). The standard proposed by China Building Materials Federation.

1 Scope

This standard specifies the principle of a carbon fiber reinforced plastics void content and fiber volume content of test materials, test equipment, samples, test Test conditions, test procedures, calculations, test results and test reports.

This standard applies to the determination of unidirectional and multidirectional carbon fiber orthogonal plies reinforced plastic void content, fiber volume fraction. Aramid and glass Glass fiber reinforced plastic can also refer to use, but not for the determination of fiber volume fraction fabric reinforced plastics.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 1446 Test methods for fiber reinforced plastic properties General

3 Principle

3.1 Void content test principle

Carbon fiber reinforced plastic, with an optical microscope, image analyzer or graph paper transparent measured total pore surface over the entire cross section of the sample Product and cross-sectional area of the sample percentage is void content of the sample.

3.2 Fiber volume content of the test principle

Carbon fiber reinforced plastic, or by an optical microscope image analyzer measurement of fiber surface area occupied by the observation area and observation hundred Division ratio, that is, the fiber volume content of the sample.

4 Test material

4.1 embedding material.

4.2 mill sandpaper, choose No. 320, No. 400, No. 600, No. 800.

4.3 polishing fabric, the choice of velvet, woolen.

4.4 polishing paste, use W0.5 W1 or synthetic diamond polishing paste.

4.5 photographic equipment.

4.6 counting grid transparent film.

5 Test Equipment

5.1 Void content test equipment

5.1.1 reflection microscope with an eyepiece grid, micrometer and other accessories.

5.1.2 image analyzer.

5.1.3 grinding, polishing equipment. […]

5.2 Fiber volume content of the test equipment

5.2.1 image analysis, quantitative measurement with analysis software (particle size, the percentage of the area) and a data processing system.

5.2.2 microscope can be enlarged to more than 1200 times

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 1446Fiber-reinforced plastics composites-The generals for determination of properties

Cited by

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Editions of GB/T 3365

Edition	Title	Revision	Status
GB/T 3365-2008	Carbon fiber reinforced plastics - Determination of void content and fiber volume content	current edition	Current
GB/T 3366-1996	Carbon fiber reinforced plastics - Determination of void content and fiber volume content	previous edition	Superseded

This page sells the current edition, GB/T 3365-2008. Earlier editions are listed for reference only.

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