This standard specifies the test equipment and materials, test specimens and preparation, test procedures, test result calculation and test report for the determination of fiber volume content of carbon fiber reinforced plastics by microscope and image analyzer. This standard is applicable to the determination of fiber volume content of carbon fiber reinforced plastics with unidirectional, orthogonal and multi-directional plies. Aramid and glass fiber reinforced plastics can also be used as a reference. This standard does not apply to fabric reinforced plastics. GB/T 3366-1996 Test method for fiber volume content of carbon fiber reinforced plastics GB/T3366-1996 Standard download decompression password: www.bzxz.net

rcs_ 59. 100. 01
National Standard of the People's Republic of China
GB/T3366--1996
Test method for fiber yolume contentof carbon fiber reinforced plasticsPublished on September 26, 1996
Implemented on April 1, 1997
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Carbon fiber reinforced plastics
Test method for fiber volume content plsstics1 Subject content and scope of application
CB/T3366—1996
Replaced with GB3366B2
This standard specifies the test preparation and materials, specimens and preparation, test steps, test result calculation and test report, etc. for determining the fiber volume content of unidirectional, orthogonal and multi-directional carbon fiber reinforced materials. Aromatic and glass fiber reinforced plastics may be used accordingly: This standard is not applicable to woven fabric plastics. 2 Test type
This method starts with taking a cross section perpendicular to the fiber axis of the carbon fiber reinforced plastic as the sample, polishing it flat, and using an optical microscope or image analyzer to determine the fiber volume content and the double-measured product. The value between the two is the fiber volume content of the sample. 3 Test equipment and materials
31 Test equipment
3.1.7 Image analysis: only with quantitative analysis software (grain surface, surface percentage) processing system, effective magnification and periodic recovery to meet the test requirements.
3.1.2 Photographic display, can magnify to more than 1200 times 3.1.3 Card counter
3.1.4 Calculate the area only;
3.1.5 Metallographic slices and polishing equipment.
3.2 Test materials
3.2.1 Plastic packaging materials, epoxy resin system with room temperature solid ratio can be used. 3.2.2 Water sanding, I use No.32C, 400.6008004: 3.2.3 Ground fabrics, velvet, woolen materials, etc. are used. 3.2.4 Koshiko blue, W1, WC.5 artificial gold stone grinding paste is selected. 4 Samples and preparation
4.1 Sampling
, 4.1.1 Unidirectional auxiliary layer test, along the cross section perpendicular to the fiber axis, the length is 20mm, the width is 10mⅡ, the height of the sample is thick, 4.1.2 Orthogonal and multi-directional paving samples, each auxiliary layer direction is taken according to 4.1.1. 4 .1.3 The specimens shall not be delaminated or cracked during cutting. The number of specimens shall not be less than 100. 4.2 Sample preparation
Approved by the State Technical Supervision Bureau on September 26, 1995 and implemented on April 1, 1997
4.2.1 After the test
CB/T3366-1996
The test sample is made of a clamp made of a material with a material composition. 4.2.2 Test pull and light
Put the fixed sample on the photosensitive machine and pull it up under the flowing water. Then use appropriate raw material and staggered light on the simulated image until the fiber lines on the test surface are clearly visible under the sharp light. 5 Test steps
5.1 National image analysis method ||t t||5.1.1 Place the sample on the image analyzer: 5.1.2 Adjust the field brightness and focus plane to obtain a clear image of the rainbow. There should be no gaps in the field of view. 5.1.3 Adjust the magnification of the image analyzer to more than 500 times and eliminate the fibers. 5.1.4 Determine the value of the difference between the area occupied by the fiber group and the observation area and record the test results. Each sample should have no less than 3 fields. 5.2 Microscope method
5.2.1 Place the sample on the microscope: 5.2.2 Take a picture of each of the 3 fields of view at 200° to determine the measured area in each field and the number of red pixels in it. There should be no gaps in the field of view.
5.2. 3 Take a photograph of the film under 120x (or 1200x) to determine the fiber surface. 5.2. On the photographs mentioned in 5.2.2, first use an electronic counter or handheld meter to stimulate each fiber in the observation area. For the fibers with an observation area of ​​more than half, count them as one fiber; those with less than half do not count. 5.2.5 On the photographs taken in 5.2.3, calculate the average cross-sectional area of ​​the two fibers by multiplication or other methods. If the cross-sectional area is the main dimension, measure the diameter and calculate the cross-sectional area. 6.1 Image separation method 6.1.1 The fiber elastic properties of the non-group test group are measured in each standard field. The mean value, standard deviation and coefficient of dispersion are the test results. 6.1.2 The half mean of the fiber volume content is calculated according to the formula (1): 1
The average fiber content
Number of sample fields per field of view:
The standard deviation of the fiber volume content in the first field of view is calculated according to the formula (2): (V-
Where: .sn.—same formula (:). 6.1.4 The coefficient of total fiber volume content (6%) is calculated according to the formula (3): C =
Where: -same formula (1)
Same formula (2). 6. Microscope output
GD/T 336EwwW.bzxz.Net
6.2.1 The volume content of each test fiber shall be calculated according to the following formula (V%): NA
Where:
The fiber content of each test fiber is N: The number of fibers in the test area is N: The average fiber area of ​​each test fiber is m;
The average fiber area of ​​each test fiber is m. E.2.2 According to 51.1 to 1, calculate the mean, standard deviation and coefficient of dispersion of the fiber volume of the test fiber. 7 Test report
Test report The following are the internal and external test numbers, external quantities and numbers, test methods and test results: The tester is responsible for the test period. Additional instructions: This standard is proposed by the Aviation Materials Thermal Engineering Standardization Department of the General Administration of Aviation Industry of China, and is under the jurisdiction of the National Fiber Weaving and Chemical Technology Committee. This standard is issued by the Beijing Institute of Standardization. The main drafters of this work are: Shi Jinwei, Xin Zhengbu, 24
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