CN111678782A - Testing device and testing method for anti-drawing performance of single fiber test piece - Google Patents
Testing device and testing method for anti-drawing performance of single fiber test piece Download PDFInfo
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- CN111678782A CN111678782A CN202010408727.9A CN202010408727A CN111678782A CN 111678782 A CN111678782 A CN 111678782A CN 202010408727 A CN202010408727 A CN 202010408727A CN 111678782 A CN111678782 A CN 111678782A
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- test piece
- fiber test
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- 238000012360 testing method Methods 0.000 title claims abstract description 93
- 239000000835 fiber Substances 0.000 title claims abstract description 64
- 239000002184 metal Substances 0.000 claims abstract description 29
- 229920001410 Microfiber Polymers 0.000 claims abstract description 10
- 239000003658 microfiber Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920006335 epoxy glue Polymers 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims 5
- 239000011159 matrix material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device and a method for testing the anti-pulling performance of a single fiber test piece, which comprises the single fiber test piece, two thin metal sheets, two clamps and two spherical hinges, wherein the two thin metal sheets are respectively adhered to two ends of the single fiber test piece, the two clamps respectively clamp the two thin metal sheets, the two spherical hinges are respectively connected with the two clamps, and the spherical hinges are arranged on an MTS testing machine. During testing, the single fiber test piece and the thin metal sheet are stuck and consolidated, then two ends of the single fiber test piece are clamped by two clamps, and then the single fiber test piece and the thin metal sheet are fixed on the spherical hinge for testing. The tensile-pulling-resistant performance testing device is simple in structure and convenient to operate, can be used for performing tensile-pulling-resistant performance testing on single microfibers, and can visually analyze the relationship among loads, tensile strain, fatigue life and the like through different types of loading tests such as monotonous axial pull or fatigue load.
Description
Technical Field
The invention belongs to the field of concrete material testing, and particularly relates to a testing device and a testing method for the anti-drawing performance of a single fiber test piece.
Background
The fiber reinforced composite material has excellent compression resistance and good crack resistance, so that the fiber reinforced composite material is widely applied. The excellent tensile mechanical property is mainly brought by the bonding effect between the fibers distributed in the matrix and the matrix. The mixing proportion of different matrixes and the bonding acting force between the fibers are obviously different, and by knowing the relation between the pulling resistance of the fibers in different matrixes and the tensile strength of the fibers, the great tensile potential of the fibers can be known, which is important for selecting proper fibers. At present, a plurality of devices for testing the tensile property between a single fiber and a matrix exist, but the tensile property of the fiber is generally provided by manufacturers, and the difference of the tensile property of products in different batches is large, so that the tensile property of the fiber needs to be tested. The test device designed by the invention can accurately test the tensile strength of a single fiber, and is beneficial to optimizing a combination scheme between the fiber and the matrix through testing the tensile strength of the fiber.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art and accurately know the tensile property of a single microfiber, the invention provides a device and a method for testing the tensile property of a single fiber test piece.
The technical scheme is as follows: the device for testing the anti-pulling performance of the single-fiber test piece comprises the single-fiber test piece, two thin metal sheets, two clamps and two spherical hinges, wherein the two thin metal sheets, the two clamps and the two spherical hinges are respectively adhered to two ends of the single-fiber test piece, the two clamps respectively clamp the two thin metal sheets, the two spherical hinges are respectively connected with the two clamps, and the spherical hinges are installed on an MTS testing machine.
Further, the clamp comprises a front clamping piece, a rear clamping piece and a clamping bolt, and the front clamping piece and the rear clamping piece are clamped through the clamping bolt.
Furthermore, the rear clamping piece comprises two parts which are vertical to each other, a gap is formed by the two parts which are vertical to each other, the front clamping piece is positioned at the gap of the rear clamping piece, threaded through holes are formed in the corresponding positions of the front clamping piece and the rear clamping piece, and the clamping bolt is matched with the threaded through holes.
Furthermore, the thin metal sheet is stuck and consolidated with the single fiber test piece by high-strength epoxy glue.
Further, the clamp is connected with the spherical hinge through a bolt.
A testing method of a testing device for the drawing resistance of the single fiber test piece comprises the following steps:
firstly, slightly straightening a single-fiber test piece, fixing thin metal sheets at two ends of the single-fiber test piece according to the length of microfiber to be tested, placing the thin metal sheets in a clamp to be clamped, and connecting the clamp with a spherical hinge;
and step two, carrying out loading test on an MTS tester.
Further, in the first step, the single-fiber test piece and the thin metal sheet are pasted and solidified by adopting high-strength epoxy glue.
Further, in the first step, the clamp comprises a front clamping piece, a rear clamping piece and a clamping bolt, the thin metal sheet is placed between the front clamping piece and the rear clamping piece of the clamp, and the front clamping piece and the rear clamping piece are clamped by the clamping bolt to fix the unit fiber test piece.
Further, in the second step, the loading includes loading in the form of monotonic axial tension and/or fatigue loading.
Further, in the second step, the test result is used for analyzing the relationship among the load, the tensile strain and the fatigue life in the loading process.
Has the advantages that: compared with the prior art, the single fiber test piece tensile resistance testing device and the single fiber test piece tensile resistance testing method are simple in structure and convenient to operate, can be used for performing tensile resistance testing on a single microfiber, and can visually analyze the relation among loads, tensile strain, fatigue life and the like through load tests in different forms such as single axial tension or fatigue load. By accurately testing the mechanical properties of the fibers, the method is beneficial to optimizing a combination scheme between the fibers and the matrix and improving the effective utilization of tensile potential of the fibers and the matrix.
Drawings
FIG. 1 is a schematic diagram of a single fiber test piece pre-treatment for testing;
FIG. 2 is a schematic view of the structure of the clamp;
FIG. 3 is a schematic structural diagram of a single fiber test piece connected with a ball joint.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
A testing device for the anti-drawing performance of a single fiber test piece comprises a single fiber test piece 1, a thin metal sheet 2, a clamp 3 and a spherical hinge 4, wherein the number of the thin metal sheet 2, the clamp 3 and the spherical hinge 4 is two. The single fiber test piece 1 is a single microfiber. As shown in figure 1, two thin metal sheets 2 are respectively stuck and consolidated at two ends of a single fiber test piece 1 by high-strength epoxy glue 5. The length of the single fiber test piece 1 between the two clamps 3 can be automatically adjusted according to the requirement. As shown in fig. 2 and 3, two clamps 3 respectively clamp two thin metal sheets 2, two spherical hinges 4 are respectively connected with the two clamps 3 through bolts, and the spherical hinges 4 are installed on the MTS testing machine.
As shown in fig. 2, the clamp 3 includes a front clamping piece 31, a rear clamping piece 32, and a clamping bolt 33, and the front clamping piece 31 and the rear clamping piece 32 are clamped by the clamping bolt 33. The rear clamping piece 32 is L-shaped and comprises two parts which are perpendicular to each other, a gap is formed by the two parts which are perpendicular to each other, the front clamping piece 31 is located at the gap of the rear clamping piece 32, threaded through holes are formed in the corresponding positions of the front clamping piece 31 and the rear clamping piece 32, and the clamping bolt 33 is matched with the threaded through holes. The clamp structure can enable the clamp to clamp the microfiber more firmly, and the clamped microfiber is stressed more uniformly. In addition, the thin metal sheets 2 are adhered to the two ends of the single-fiber test piece 1, the clamp 3 indirectly clamps the single fibers by clamping the thin metal sheets instead of directly clamping the single fibers, clamping can be firmer, the single fibers are not easy to fall off, and force application is more uniform.
A testing method of a drawing resistance testing device using a single fiber test piece comprises the following steps:
firstly, slightly straightening a single fiber test piece, adhering and solidifying thin metal sheets at two ends of the single fiber test piece by adopting high-strength epoxy glue according to the length of microfibers to be tested, cutting off redundant microfibers, placing the thin metal sheets between a front clamping piece and a rear clamping piece of a clamp, clamping the front clamping piece and the rear clamping piece by using a clamping bolt to fix the single fiber test piece, and connecting the clamp with a spherical hinge;
and step two, carrying out loading tests on an MTS testing machine, wherein the loading tests comprise loading in the forms of single axial tension, fatigue load and the like. And the loading test result is used for analyzing the relation among load, tensile strain and fatigue life in the loading process.
Claims (10)
1. The device for testing the anti-pulling performance of the single-fiber test piece is characterized by comprising the single-fiber test piece, two thin metal sheets, two clamps and two spherical hinges, wherein the two thin metal sheets are respectively adhered to two ends of the single-fiber test piece, the two clamps respectively clamp the two thin metal sheets, the two spherical hinges are respectively connected with the two clamps, and the spherical hinges are arranged on an MTS testing machine.
2. The device for testing the pulling resistance of a single fiber test piece according to claim 1, wherein the clamp comprises a front clamping piece, a rear clamping piece and a clamping bolt, and the front clamping piece and the rear clamping piece are clamped by the clamping bolt.
3. The apparatus for testing the pulling resistance of a single fiber test piece according to claim 2, wherein the rear clamping piece comprises two parts perpendicular to each other, the two parts perpendicular to each other form a gap, the front clamping piece is located at the gap of the rear clamping piece, the front clamping piece and the rear clamping piece are provided with threaded through holes at corresponding positions, and the clamping bolt is matched with the threaded through holes.
4. The device for testing the pulling resistance of the single-fiber test piece according to claim 1 or 2, wherein the thin metal sheet is adhered and fixed to the single-fiber test piece by high-strength epoxy glue.
5. The apparatus for testing the pullout resistance of a single fiber test piece according to claim 1 or 2, wherein the clamp and the ball hinge are connected by a bolt.
6. A test method using the apparatus for testing the pullout resistance of a single fiber test piece according to claims 1 to 5, comprising the steps of:
firstly, slightly straightening a single-fiber test piece, fixing thin metal sheets at two ends of the single-fiber test piece according to the length of microfiber to be tested, placing the thin metal sheets in a clamp to be clamped, and connecting the clamp with a spherical hinge;
and step two, carrying out loading test on an MTS tester.
7. The test method as claimed in claim 6, wherein in the step one, the single fiber test piece is adhered to the thin metal sheet by high-strength epoxy glue for curing.
8. The test method as claimed in claim 6 or 7, wherein in the first step, the clamp comprises a front clamping piece, a rear clamping piece and a clamping bolt, the thin metal sheet is placed between the front clamping piece and the rear clamping piece of the clamp, and the front clamping piece and the rear clamping piece are clamped by the clamping bolt to fix the unit fiber test piece.
9. The test method according to claim 6 or 7, wherein in step two, the loading comprises loading in the form of monotonic axial tension and/or fatigue loading.
10. The test method according to claim 6 or 7, wherein in the second step, the test result is used for analyzing the relationship among the load, the tensile strain and the fatigue life in the loading process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408727.9A CN111678782A (en) | 2020-05-14 | 2020-05-14 | Testing device and testing method for anti-drawing performance of single fiber test piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408727.9A CN111678782A (en) | 2020-05-14 | 2020-05-14 | Testing device and testing method for anti-drawing performance of single fiber test piece |
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|---|---|
| CN111678782A true CN111678782A (en) | 2020-09-18 |
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| CN202010408727.9A Pending CN111678782A (en) | 2020-05-14 | 2020-05-14 | Testing device and testing method for anti-drawing performance of single fiber test piece |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA303273A (en) * | 1973-04-06 | 1978-04-15 | Chemiefaser Lenzing Ag | PROCEDURE FOR DETERMINING THE TENSILE STRENGTH OF INDIVIDUAL FIBERS, IN PARTICULAR CHEMICAL FIBERS |
| WO1990008306A2 (en) * | 1989-01-04 | 1990-07-26 | Zellweger Uster, Inc. | Fiber testing apparatus and method |
| JPH0593680A (en) * | 1991-10-02 | 1993-04-16 | Kobe Steel Ltd | Jig for tensile test of rod-shaped body prepared by impregnating synthetic fiber with resin liquid and hardening the same |
| US5842373A (en) * | 1995-12-08 | 1998-12-01 | Textechno Herbert Stein Gmbh & Co. Kg | Single fiber testing device |
| CN103760016A (en) * | 2014-02-13 | 2014-04-30 | 北京工业大学 | Fixture for testing composite material interface mechanical properties and experimental method |
| CN103792138A (en) * | 2014-02-20 | 2014-05-14 | 无锡华能电缆有限公司 | Detachable fixture for fiber-reinforced resin-based composite mandril experiment |
| CN104020043A (en) * | 2014-06-20 | 2014-09-03 | 中国科学院理化技术研究所 | Tool clamp for testing low-temperature mechanical tensile properties of fiber reinforced composite material |
| CN203965242U (en) * | 2014-06-27 | 2014-11-26 | 陕西天策新材料科技有限公司 | A kind of carbon fiber monofilament Mechanics Performance Testing fixture |
| CN204286926U (en) * | 2014-09-23 | 2015-04-22 | 北京师范大学 | A kind of test piece mould of fragility sandwich material and supporting tensile test fixture thereof |
| CN107036901A (en) * | 2017-04-28 | 2017-08-11 | 武汉大学 | A kind of monofilament pull-out test device for applying lateral pressure |
| CN110186751A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of clamping plate type anchorage for light circle pultrusion CFRP bar drawing test |
| CN110470532A (en) * | 2019-08-02 | 2019-11-19 | 中国航发北京航空材料研究院 | A kind of fibre bundle scanning electron microscope home position stretch analysis sample preparation apparatus |
-
2020
- 2020-05-14 CN CN202010408727.9A patent/CN111678782A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA303273A (en) * | 1973-04-06 | 1978-04-15 | Chemiefaser Lenzing Ag | PROCEDURE FOR DETERMINING THE TENSILE STRENGTH OF INDIVIDUAL FIBERS, IN PARTICULAR CHEMICAL FIBERS |
| WO1990008306A2 (en) * | 1989-01-04 | 1990-07-26 | Zellweger Uster, Inc. | Fiber testing apparatus and method |
| JPH0593680A (en) * | 1991-10-02 | 1993-04-16 | Kobe Steel Ltd | Jig for tensile test of rod-shaped body prepared by impregnating synthetic fiber with resin liquid and hardening the same |
| US5842373A (en) * | 1995-12-08 | 1998-12-01 | Textechno Herbert Stein Gmbh & Co. Kg | Single fiber testing device |
| CN103760016A (en) * | 2014-02-13 | 2014-04-30 | 北京工业大学 | Fixture for testing composite material interface mechanical properties and experimental method |
| CN103792138A (en) * | 2014-02-20 | 2014-05-14 | 无锡华能电缆有限公司 | Detachable fixture for fiber-reinforced resin-based composite mandril experiment |
| CN104020043A (en) * | 2014-06-20 | 2014-09-03 | 中国科学院理化技术研究所 | Tool clamp for testing low-temperature mechanical tensile properties of fiber reinforced composite material |
| CN203965242U (en) * | 2014-06-27 | 2014-11-26 | 陕西天策新材料科技有限公司 | A kind of carbon fiber monofilament Mechanics Performance Testing fixture |
| CN204286926U (en) * | 2014-09-23 | 2015-04-22 | 北京师范大学 | A kind of test piece mould of fragility sandwich material and supporting tensile test fixture thereof |
| CN107036901A (en) * | 2017-04-28 | 2017-08-11 | 武汉大学 | A kind of monofilament pull-out test device for applying lateral pressure |
| CN110186751A (en) * | 2019-05-17 | 2019-08-30 | 天津大学 | A kind of clamping plate type anchorage for light circle pultrusion CFRP bar drawing test |
| CN110470532A (en) * | 2019-08-02 | 2019-11-19 | 中国航发北京航空材料研究院 | A kind of fibre bundle scanning electron microscope home position stretch analysis sample preparation apparatus |
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Application publication date: 20200918 |
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