CN112730064A - Method for testing tensile breaking strength of carbon fiber fabric - Google Patents
Method for testing tensile breaking strength of carbon fiber fabric Download PDFInfo
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- CN112730064A CN112730064A CN202011587829.8A CN202011587829A CN112730064A CN 112730064 A CN112730064 A CN 112730064A CN 202011587829 A CN202011587829 A CN 202011587829A CN 112730064 A CN112730064 A CN 112730064A
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- breaking strength
- tensile breaking
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- 239000004744 fabric Substances 0.000 title claims abstract description 90
- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 21
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 239000002390 adhesive tape Substances 0.000 claims abstract description 14
- 239000003292 glue Substances 0.000 claims abstract description 9
- 238000007598 dipping method Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 238000010998 test method Methods 0.000 claims abstract 2
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 claims description 10
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 229960001124 trientine Drugs 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000009941 weaving Methods 0.000 abstract description 2
- 239000002759 woven fabric Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A test method of tensile breaking strength of carbon fiber fabric comprises the steps of sticking a frame with a transparent adhesive tape to obtain a fabric to be tested, cutting the fabric to be tested along the center line of the adhesive tape, and sampling; sampling, dipping in glue and curing, and then cutting out a sample piece, wherein the length direction is the fiber direction; and gluing the reinforcing sheets at two ends of the sample sheet, wherein each group of tests has at least 5 effective data, and calculating the average value as the tensile breaking strength of the fabric. The consistency of the test sample strips and the heredity of the fiber tension during weaving can be ensured, and the fibers are not easy to be pinched off and slide during testing, so that the inherent characteristics of the fabric are embodied to the maximum extent. The method is simple and easy to implement, the tools and materials are easy to obtain, and the method has high economical efficiency and popularization and is very suitable for testing the tensile fracture strength of the carbon fiber fabrics with various structural forms, such as woven fabrics, multi-axial fabrics and the like.
Description
Technical Field
The invention relates to the technical field of new material detection, in particular to a method for testing tensile breaking strength of a carbon fiber fabric.
Background
The tensile breaking strength of the fabric of the carbon fiber is difficult to test due to the ultrahigh specific strength and modulus and the smoother fiber surface. For example, the GB/T3923.1 introduces a method, when in direct test, the clamping of a universal testing machine test chuck is often impossible, or the clamping is broken, the wool is clipped, or the fiber slips, and the fiber cannot be cooperatively stressed, so that the test data is low, and the tensile property and the fiber tension uniformity of the fabric cannot be truly reflected, so that the standard directly indicates that the method is not suitable for the test of the carbon fiber fabric. For example, the method introduced in GB/T7689.5, the wettability of glue on fabrics is difficult to control, if the viscosity of the glue is high, the wettability of fibers is poor, it is difficult to ensure that each fiber is fully wetted, and tensile fracture strength data is low due to fiber slippage during testing; if the viscosity of the glue is low and the fiber wettability is good, the glue cannot be infiltrated into a fabric area which does not need gum dipping, so that the consistency of the state of the test sample strip is difficult to ensure.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method for testing the tensile breaking strength of a carbon fiber fabric, which can embody the tensile strength and the tension uniformity of the fabric as much as possible.
The invention aims to solve the technical problem by adopting the following technical scheme, and the method for testing the tensile breaking strength of the carbon fiber fabric is characterized by comprising the following steps of:
1) sampling: naturally unreeling a carbon fiber fabric for a certain length from a reel on a flat table top, keeping the original state of the fabric as far as possible without the external force during unreeling, sticking the fabric to be tested by using a 5-30 mm transparent adhesive tape to frame, fully sticking the adhesive tape to the fabric by using strong pressing, and then cutting the fabric to be tested along the central line of the adhesive tape by using scissors;
2) gum dipping: preparing a flat plate, wherein the size of the flat plate is larger than that of the fabric to be tested, the natural warping degree is smaller than 1mm, demolding cloth is pasted on one side of the flat plate, the taken-off fabric to be tested is flatly paved on one side, to which the demolding cloth is pasted, and then liquid epoxy resin glue is uniformly brushed on the fabric to be tested once;
3) and (3) curing: putting the dipped fabric to be tested and the flat plate into an oven together, curing for 30-90 min at 40-120 ℃, cooling to room temperature, and taking out the hardened fabric;
4) cutting: cutting a rectangular sample piece on the hardened fabric to be tested, wherein the length direction is the fiber direction;
5) gluing the reinforcing sheet: respectively sticking reinforcing sheets to two ends of the sample sheet to enable two ends of the fabric sample sheet to be positioned in the middle of the reinforcing sheet and to be in a clamped state, and ensuring that the effective sample sheet length in the middle of the reinforcing sheet is not less than 200mm after bonding and curing;
6) and (3) testing: and clamping the hardened fabric glued with the reinforcing sheet to the middle of a test chuck of a universal testing machine, locking, stretching the test sample at a constant speed until the test sample is broken, recording the maximum force of the test sample when the test sample is broken, wherein each group of tests has at least 5 effective data, and calculating the average value as the tensile breaking strength of the fabric.
The technical problem to be solved by the invention can be further realized by the following technical scheme, the liquid epoxy resin adhesive in the step 2) is a composition of E51 and triethylene tetramine, and the proportion of the liquid epoxy resin adhesive is E51: triethylene tetramine =10g: 0.5-1.5 g, and is prepared on site before use.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the reinforcing sheet in the step 5) is made of aluminum alloy or glass fiber reinforced plastic and has the thickness of 1-3 mm.
Compared with the prior art, the invention adopts the procedures of sampling, gum dipping, curing, cutting, reinforcing and the like, can ensure the consistency of the test sample strips and the heredity of the fiber tension during weaving, and can also ensure that the fibers are not easy to be pinched off and slide during testing, thereby reflecting the inherent characteristics of the fabric to the maximum extent. The method is simple and easy to implement, the tools and materials are easy to obtain, and the method has high economical efficiency and popularization and is very suitable for testing the tensile fracture strength of the carbon fiber fabrics with various structural forms, such as woven fabrics, multi-axial fabrics and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, and in order to make those skilled in the art understand the present invention further, the embodiments of the present invention will be described in detail and fully with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for testing tensile breaking strength of carbon fiber fabric,
1) sampling: naturally unreeling a carbon fiber fabric for a certain length from a reel on a flat table top, keeping the original state of the fabric as far as possible without the external force during unreeling, sticking the fabric to be tested by using a 5-30 mm transparent adhesive tape to frame, fully sticking the adhesive tape to the fabric by using strong pressing, and then cutting the fabric to be tested along the central line of the adhesive tape by using scissors;
2) gum dipping: preparing a flat plate, wherein the size of the flat plate is larger than that of the fabric to be tested, the natural warping degree is smaller than 1mm, demolding cloth is pasted on one side of the flat plate, the taken-off fabric to be tested is flatly paved on one side, to which the demolding cloth is pasted, and then liquid epoxy resin glue is uniformly brushed on the fabric to be tested once;
3) and (3) curing: putting the dipped fabric to be tested and the flat plate into an oven together, curing for 30-90 min at 40-120 ℃, cooling to room temperature, and taking out the hardened fabric;
4) cutting: cutting a rectangular sample piece on the hardened fabric to be tested, wherein the length direction is the fiber direction;
5) gluing the reinforcing sheet: respectively sticking reinforcing sheets to two ends of the sample sheet to enable two ends of the fabric sample sheet to be positioned in the middle of the reinforcing sheet and to be in a clamped state, and ensuring that the effective sample sheet length in the middle of the reinforcing sheet is not less than 200mm after bonding and curing;
6) and (3) testing: and clamping the hardened fabric glued with the reinforcing sheet to the middle of a test chuck of a universal testing machine, locking, stretching the test sample at a constant speed until the test sample is broken, recording the maximum force of the test sample when the test sample is broken, wherein each group of tests has at least 5 effective data, and calculating the average value as the tensile breaking strength of the fabric.
Examples
A method for testing tensile breaking strength of carbon fiber fabric,
1) sampling: naturally unreeling a carbon fiber fabric for a certain length from a reel on a flat table top, keeping the original state of the fabric as far as possible without the action of external force during unreeling, sticking a transparent adhesive tape of 5-30 mm to form a 400 x 400mm fabric area, fully sticking the adhesive tape to the fabric by strong pressing, and then cutting the fabric along the central line of the adhesive tape by using scissors;
2) gum dipping: preparing a flat plate, wherein the size of the flat plate is 450 x 450mm in length and width, the natural warping degree is less than 1mm, demolding cloth is pasted on one side of the flat plate, the taken single-layer carbon fiber fabric is flatly paved on one side, with the demolding cloth, of the flat plate, and then liquid epoxy resin glue is uniformly brushed on the fabric once;
3) and (3) curing: putting the dipped fabric and the flat plate into an oven together, curing for 30-90 min at 40-120 ℃, cooling to room temperature, and taking out the hardened fabric;
4) cutting: cutting sample pieces with the length and width of 300mm x 50mm from the hardened fabric, wherein the length direction is the fiber direction;
5) gluing the reinforcing sheet: respectively sticking 2 reinforcing sheets with the length and the width of 50mm and 50mm to the two ends of the sample sheet to enable the fabric sample sheet to be in a clamped state in the middle of the reinforcing sheet, and ensuring that the effective sample sheet length in the middle of the reinforcing sheet is 200 +/-1 mm after bonding and curing;
6) and (3) testing: and clamping the hardened fabric glued with the reinforcing sheet to the middle of a test chuck of a universal testing machine, locking, stretching the test sample at a constant speed until the test sample is broken, recording the maximum force when the test sample is broken, wherein each group of tests needs 5 effective data, and calculating the average value as the tensile breaking strength of the fabric.
The liquid epoxy resin adhesive in the step 2) is a composition of E51 and triethylene tetramine, and the proportion of the liquid epoxy resin adhesive is E51: triethylene tetramine =10g: 0.5-1.5 g, and is prepared on site before use.
And 5) the reinforcing sheet is made of aluminum alloy or glass fiber reinforced plastic and has the thickness of 1-3 mm.
The fracture conditions of the carbon fiber fabric after the test are as follows:
tensile breaking strength data are shown in the table
Claims (3)
1. A test method for tensile breaking strength of carbon fiber fabric is characterized by comprising the following steps:
1) sampling: naturally unreeling a carbon fiber fabric for a certain length from a reel on a flat table top, keeping the original state of the fabric as far as possible without the external force during unreeling, sticking the fabric to be tested by using a transparent adhesive tape to frame, fully attaching the adhesive tape to the fabric by using strong pressing, and then cutting the fabric to be tested by using scissors along the central line of the adhesive tape;
2) gum dipping: preparing a flat plate, wherein the size of the flat plate is larger than that of the fabric to be tested, the natural warping degree is smaller than 1mm, demolding cloth is pasted on one side of the flat plate, the taken-off fabric to be tested is flatly paved on one side, to which the demolding cloth is pasted, and then liquid epoxy resin glue is uniformly brushed on the fabric to be tested once;
3) and (3) curing: putting the dipped fabric to be tested and the flat plate into an oven together, curing for 30-90 min at 40-120 ℃, cooling to room temperature, and taking out the hardened fabric;
4) cutting: cutting a rectangular sample piece on the hardened fabric to be tested, wherein the length direction is the fiber direction;
5) gluing the reinforcing sheet: respectively sticking reinforcing sheets to two ends of the sample sheet to enable two ends of the fabric sample sheet to be positioned in the middle of the reinforcing sheet and to be in a clamped state, and ensuring that the effective sample sheet length in the middle of the reinforcing sheet is not less than 200mm after bonding and curing;
6) and (3) testing: and clamping the hardened fabric glued with the reinforcing sheet to the middle of a test chuck of a universal testing machine, locking, stretching the test sample at a constant speed until the test sample is broken, recording the maximum force of the test sample when the test sample is broken, wherein each group of tests has at least 5 effective data, and calculating the average value as the tensile breaking strength of the fabric.
2. The method for testing tensile breaking strength of a carbon fiber fabric according to claim 1, characterized in that: the liquid epoxy resin adhesive in the step 2) is a composition of E51 and triethylene tetramine, and the proportion of the liquid epoxy resin adhesive is E51: triethylene tetramine =10g: 0.5-1.5 g, and is prepared on site before use.
3. The method for testing tensile breaking strength of a carbon fiber fabric according to claim 1, characterized in that: and 5) the reinforcing sheet is made of aluminum alloy or glass fiber reinforced plastic and has the thickness of 1-3 mm.
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| CN202011587829.8A CN112730064B (en) | 2020-12-29 | 2020-12-29 | Method for testing tensile breaking strength of carbon fiber fabric |
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| CN202011587829.8A CN112730064B (en) | 2020-12-29 | 2020-12-29 | Method for testing tensile breaking strength of carbon fiber fabric |
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| CN112730064B CN112730064B (en) | 2023-04-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113176128A (en) * | 2021-05-19 | 2021-07-27 | 中国建筑科学研究院有限公司 | Sample preparation method for testing tensile property of unidirectional carbon fiber cloth |
| CN116519476A (en) * | 2023-06-30 | 2023-08-01 | 太仓群特电工材料有限公司 | Research and development is with data detection device of high-strength fiber adhesive tape |
| CN117110060A (en) * | 2023-10-23 | 2023-11-24 | 南通市法博纤维织造有限公司 | Method for testing tensile strength of alkali-resistant glass fiber mesh cloth |
| CN117139175A (en) * | 2023-11-01 | 2023-12-01 | 江苏启宸新材料有限公司 | Quality control method for screening short fibers special for environment-friendly spunlaced non-woven fabric |
| CN117309525A (en) * | 2023-09-28 | 2023-12-29 | 浦江县丰源家纺有限公司 | Fabric tear resistance detection equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176128A (en) * | 2021-05-19 | 2021-07-27 | 中国建筑科学研究院有限公司 | Sample preparation method for testing tensile property of unidirectional carbon fiber cloth |
| CN116519476A (en) * | 2023-06-30 | 2023-08-01 | 太仓群特电工材料有限公司 | Research and development is with data detection device of high-strength fiber adhesive tape |
| CN116519476B (en) * | 2023-06-30 | 2023-10-20 | 太仓群特电工材料有限公司 | Research and development is with data detection device of high-strength fiber adhesive tape |
| CN117309525A (en) * | 2023-09-28 | 2023-12-29 | 浦江县丰源家纺有限公司 | Fabric tear resistance detection equipment |
| CN117309525B (en) * | 2023-09-28 | 2024-02-20 | 浦江县丰源家纺有限公司 | Fabric tear resistance detection equipment |
| CN117110060A (en) * | 2023-10-23 | 2023-11-24 | 南通市法博纤维织造有限公司 | Method for testing tensile strength of alkali-resistant glass fiber mesh cloth |
| CN117110060B (en) * | 2023-10-23 | 2023-12-26 | 南通市法博纤维织造有限公司 | Method for testing tensile strength of alkali-resistant glass fiber mesh cloth |
| CN117139175A (en) * | 2023-11-01 | 2023-12-01 | 江苏启宸新材料有限公司 | Quality control method for screening short fibers special for environment-friendly spunlaced non-woven fabric |
| CN117139175B (en) * | 2023-11-01 | 2023-12-29 | 江苏启宸新材料有限公司 | Quality control method for screening short fibers special for environment-friendly spunlaced non-woven fabric |
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