CN109580353A - One kind is for fibre bundle tension failure single-point type electroacoustic measurement apparatus and method and purposes - Google Patents
One kind is for fibre bundle tension failure single-point type electroacoustic measurement apparatus and method and purposes Download PDFInfo
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- CN109580353A CN109580353A CN201811569073.7A CN201811569073A CN109580353A CN 109580353 A CN109580353 A CN 109580353A CN 201811569073 A CN201811569073 A CN 201811569073A CN 109580353 A CN109580353 A CN 109580353A
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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
- G01N2203/0058—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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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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
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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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to one kind for fibre bundle tension failure single-point type electroacoustic measurement apparatus and method and purposes.Collet, force snesor, high-frequency sound capture card, data acquisition and procession module and the test mechanism that the device is stretched by sonic transducer, the shielding case of placement symmetrical above and below, a pair of of bundle fiber at.The device also may be mounted on pressley test instrument, the device is using sonic transducer as measuring unit, the acoustical signal issued when receiving fiber failure, according to acoustic emission energy parameter and amplitude distribution, fracture number of fiber and fibre strength value are analyzed according to intensity and energy the export characteristic value to acoustical signal, it can be used for the broken filament intensity distribution of bundle fiber Tensile Fracture Process, the accurate estimation of extension at break distribution, and then more single fiber tension tests are substituted with bundle fiber tension test, realize that one surveys multi objective and quick precise measurement.
Description
Technical field
The present invention relates to one kind for fibre bundle tension failure single-point type electroacoustic measurement apparatus and method and purposes, belongs to beam fibre
Tie up strength automatic measurement field.
Background technique
Acoustic emission testing technology be for one of non-destructive testing new method, its advantage is that: the signal of acoustic emission detection
From test object itself, therefore real-time detection can be realized to test object；Wide application, almost all of material are ok
Acoustic emission detection is carried out, and acoustic emission detection does not receive the influence of the size, geometric properties, working environment of test object.
Sound emission is also known as stress wave transmitting, is that material internal is deformed by external force, is broken or internal stress is super
The phenomenon that crossing yield limit and enter irreversible plastic period, strain energy is discharged in the form of Elastic wave.Sound emission
Elastic wave can reflect the property of material or components, therefore may determine that material or zero using the method for detection acoustic emission signal
Certain state of component.
Summary of the invention
The purpose of the present invention is: acoustic emission testing technology is applied in fibre bundle Tensile Fracture Process, at signal
Reason system detects the breaking state of fibre bundle single fiber in Tensile Fracture Process in real time, and passes through computer processing system point
Analyse fiber strength.
In order to achieve the above object, fibre bundle tension failure single-point type is used for the technical solution of the present invention is to provide a kind of
Electroacoustic measurement apparatus characterized by comprising
Dynamic collet and the fixed clamp head in position, dynamic collet and clamp head are clamped in fibre bundle both ends respectively, move folder
The fiber bundle drawing that head will be clamped in moving process, meanwhile, fibre bundle is acted on by the detection of clamp head by force snesor
On power；
Dynamic collet and clamp head upper and lower ends are respectively equipped with shielding case and lower shielding case, upper shielding case and lower shielding case point
Not by between dynamic collet and clamp head upper space and lower space be completely covered, upper shielding case and lower shielding case are for reflecting
Outside noise simultaneously absorbs the internal sound；
Sonic transducer between upper shielding case and lower shielding case, what sonic transducer was used to issue when detecting fibrous fracture
Pulsed sound signal strength and frequency；
For acquiring the pulsed sound signal strength of sonic transducer detection and the ultra-high frequency sound capture card of frequency；
The computer being connected with ultra-high frequency sound capture card and force snesor, by computer to ultra-high frequency sound capture card and
The collected data of force snesor are analyzed and are calculated.
Preferably, the frequency acquisition of the sonic transducer is not less than 100kHz.
Preferably, the upper shielding case and the lower shielding case exposed surface are sound reflection material；The upper shielding case and
The lower shielding case is close to the planar section of section of the dynamic collet and the clamp head, other sections are arcuate portion.
There is provided a kind of fibre bundle tension failure single-point type sound measurement methods for another technical solution of the invention, special
Sign is, using above-mentioned device, comprising the following steps:
Parallel fibers beam is placed between clamp head and dynamic collet by step 1, is clamped fibre bundle by clamp head and dynamic collet；
Step 2, dynamic collet are mobile, start to stretch fibre bundle, and clamp head experiences pulling force, and it is bent to obtain drawing force-elongation
The intensity of line and fibre bundle, modulus, elongation at break and breaking work；
Step 3, as the pulling of fibre bundle extends, the fiber in fibre bundle starts to be broken, and it is disconnected that sonic transducer acquires fiber
The impulse hunting acoustic signals that split and obtain the impulse hunting sound wave sound spectrum in fiber Tensile Fracture Process；
Step 4, the breaking strength distribution that single fiber is exported according to the result of step 2 and step 3 and elongation at break are distributed
And the mean intensity and the coefficient of variation and average elongation and the coefficient of variation of single fiber.
There is provided a kind of above-mentioned fibre bundle tension failure single-point type sound measurement sides for another technical solution of the invention
The application of method, which is characterized in that be distributed for the broken filament intensity distribution of bundle fiber Tensile Fracture Process, extension at break
Accurate estimation, and then substitute more single fiber tension tests with bundle fiber tension test realizes that one surveys multi objective and quickly accurate
Measurement.
The principle of the present invention is effect of the fibre bundle when stretching by deformation force, fine after stretcher strain to a certain extent
Single fiber is broken in dimension beam, and strain energy, i.e. sound wave are discharged in the form of Elastic wave.Sound will be received by sensor
Wave is transferred to Computerized analysis system.The radical of fibrous fracture is judged using swarming technology and wave crest appearance position, and is led to
The amplitude of wave crest is crossed to characterize the intensity of fiber.
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit: (a) ultra-high frequency sound capture card can acquire the impulse hunting acoustic signals and sound wave sound spectrum of fibrous fracture；(b) blimp
Shape and material guarantee that test process effectively completely cuts off ambient noise；(c) blimp can reduce cover while completely cutting off ambient noise
The reflection of interior sound wave keeps test result accurate.
Detailed description of the invention
Single-point type electroacoustic measurement apparatus when Fig. 1 is for fibre bundle tension failure；
Fig. 2 is fibrous fracture impulse hunting acoustic signals figure；
Fig. 3 is fibre bundle Tensile Fracture Process sonograph, and abscissa is the time, and ordinate is the amplitude of signal；
In figure: the upper shielding case of 1-；Shielding case under 2-；31- moves collet；32- clamp head；41- is broken fiber；42- fracture sound
Wave；51- sonic transducer；52- force snesor；61- sound acquisition module；62- power acquisition module；7- computer.
Specific embodiment
Present invention will be further explained below with reference to specific examples.Raw material and equipment in implementation grind for state key
Hair plan (2016YFC0802802) Funded Projects.It should be understood that these embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art can be to this hair
Bright to make various changes or modifications, these equivalent forms also fall within the scope of the appended claims of the present application.
Embodiment 1: flaxen fiber beam
Flaxen fiber beam is placed between clamp head 32 and dynamic collet 31, collet 31 is then moved and moves right, starts to stretch fiber
Beam 41, force snesor 52 experiences pulling force by clamp head 32, so that computer 7 can get drawing force-extension curve and beam
Intensity, modulus, elongation at break and the breaking work of fiber.As the pulling of fibre bundle 41 extends, the fiber in fibre bundle 41
Start to be broken, acquired the impulse hunting acoustic signals of fibrous fracture by sonic transducer 51 and is obtained in fiber Tensile Fracture Process
Impulse hunting sound wave sound spectrum；And can the count radical for being broken fiber and the sound intensity degree and acoustic energy for measuring fracture fiber.According to
To as a result, computer 7 can export single fiber breaking strength distribution and elongation at break distribution and single fiber it is average strong
Degree and the coefficient of variation and average elongation and the coefficient of variation.
Embodiment 2: carbon fiber bundle
Carbon fiber bundle is placed between clamp head 32 and dynamic collet 31, collet 31 is then moved and moves right, starts to stretch fiber
Beam 41, force snesor 52 experiences pulling force by clamp head 32, so that computer 7 can get drawing force-extension curve and beam
Intensity, modulus, elongation at break and the breaking work of fiber.As the pulling of fibre bundle 41 extends, the fiber in fibre bundle 41
Start to be broken, acquired the impulse hunting acoustic signals of fibrous fracture by sonic transducer 51 and is obtained in fiber Tensile Fracture Process
Impulse hunting sound wave sound spectrum；And can the count radical for being broken fiber and the sound intensity degree and acoustic energy for measuring fracture fiber；According to
To object computer 7 can export single fiber breaking strength distribution and elongation at break distribution and single fiber mean intensity
With the coefficient of variation and average elongation and the coefficient of variation.
Embodiment 3: wool fiber beam
Wool fiber beam is placed between clamp head 32 and dynamic collet 31, collet 31 is then moved and moves right, starts to stretch fine
Beam 41 is tieed up, force snesor 52 experiences pulling force by clamp head 32, so that computer 7 can get drawing force-extension curve, and
Intensity, modulus, elongation at break and the breaking work of bundle fiber.As the pulling of fibre bundle 41 extends, the fibre in fibre bundle 41
Dimension starts to be broken, and is acquired the impulse hunting acoustic signals of fibrous fracture by sonic transducer 51 and is obtained in fiber Tensile Fracture Process
Impulse hunting sound wave sound spectrum, as shown in Figure 3；And can the count radical for being broken fiber and the sound intensity degree harmony for measuring fracture fiber
Energy；The breaking strength distribution of single fiber can be exported according to obtained object computer 7 and elongation at break is distributed and single fiber
The mean intensity and the coefficient of variation and average elongation and the coefficient of variation of dimension.
Claims (5)
1. one kind is used for fibre bundle tension failure single-point type electroacoustic measurement apparatus characterized by comprising
Dynamic collet (31) and the fixed clamp head (32) in position, dynamic collet (31) and clamp head (32) are clamped in fiber respectively
Collet (31) are moved in moving process for clamped fiber bundle drawing in beam both ends, meanwhile, clamp is passed through by force snesor (52)
Head (32) detection acts on the power on fibre bundle；
Dynamic collet (31) and clamp head (32) upper and lower ends are respectively equipped with shielding case (1) and lower shielding case (2), upper shielding case
(1) and lower shielding case (2) respectively by between dynamic collet (31) and clamp head (32) upper space and lower space be completely covered,
Upper shielding case (1) and lower shielding case (2) are for reflecting outside noise and absorbing the internal sound；
Sonic transducer (51) between upper shielding case (1) and lower shielding case (2), sonic transducer (51) are disconnected for detecting fiber
The pulsed sound signal strength and frequency issued when splitting；
For acquiring the pulsed sound signal strength of sonic transducer (51) detection and the ultra-high frequency sound capture card (61) of frequency；
The computer (7) being connected with ultra-high frequency sound capture card (61) and force snesor (52), by computer (7) to ultra-high frequency
Sound capture card (61) and force snesor (52) collected data are analyzed and are calculated.
2. according to claim 1 a kind of for fibre bundle tension failure single-point type electroacoustic measurement apparatus, which is characterized in that institute
The frequency acquisition of sonic transducer (51) is stated not less than 100kHz.
3. according to claim 1 a kind of for fibre bundle tension failure single-point type electroacoustic measurement apparatus, feature exists, described
Upper shielding case (1) and lower shielding case (2) exposed surface are sound reflection material；The upper shielding case (1) and the lower shielding
The planar section of section that (2) are close to the dynamic collet (31) and the clamp head (32) is covered, other sections are arcuate portion.
4. a kind of fibre bundle tension failure single-point type sound measurement method, which is characterized in that using dress as described in claim 1
It sets, comprising the following steps:
Parallel fibers beam is placed between clamp head (32) and dynamic collet (31) by step 1, will by clamp head (32) and dynamic collet (31)
Fibre bundle (41) clamps；
Step 2, dynamic collet (31) are mobile, start to stretch fibre bundle (41), clamp head (32) experiences pulling force, and obtains drawing force-
Intensity, modulus, elongation at break and the breaking work of extension curve and fibre bundle (41)；
Step 3, as the pulling of fibre bundle (41) extends, the fiber in fibre bundle (41) starts to be broken, and sonic transducer (51) is adopted
Collect the impulse hunting acoustic signals of fibrous fracture and obtains the impulse hunting sound wave sound spectrum in fiber Tensile Fracture Process；
Step 4, according to the result of step 2 and step 3 export single fiber breaking strength distribution and elongation at break distribution and
The mean intensity and the coefficient of variation and average elongation and the coefficient of variation of single fiber.
5. a kind of application of fibre bundle tension failure single-point type sound measurement method as claimed in claim 4, which is characterized in that use
In the accurate estimation that the broken filament intensity distribution of bundle fiber Tensile Fracture Process, extension at break are distributed, and then with bundle fiber
Tension test substitutes more single fiber tension tests, realizes that one surveys multi objective and quick precise measurement.
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| CN201811569073.7A CN109580353A (en) | 2018-12-21 | 2018-12-21 | One kind is for fibre bundle tension failure single-point type electroacoustic measurement apparatus and method and purposes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474054A (en) * | 2020-04-21 | 2020-07-31 | 南京航空航天大学 | Method for measuring and calculating strength distribution of inorganic nonmetallic fibers |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474054A (en) * | 2020-04-21 | 2020-07-31 | 南京航空航天大学 | Method for measuring and calculating strength distribution of inorganic nonmetallic fibers |
| CN111474054B (en) * | 2020-04-21 | 2021-06-29 | 南京航空航天大学 | Method for measuring and calculating strength distribution of inorganic nonmetallic fibers |
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