CN107101885A - Acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension - Google Patents
Acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension Download PDFInfo
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- CN107101885A CN107101885A CN201710277319.2A CN201710277319A CN107101885A CN 107101885 A CN107101885 A CN 107101885A CN 201710277319 A CN201710277319 A CN 201710277319A CN 107101885 A CN107101885 A CN 107101885A
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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
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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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
- G01N2203/0071—Creep
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Abstract
Acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension, including fatigue tester, stretching clamp, etching tank, corrosive medium, acoustic emission monitoring system, fujinon electronic video endoscope and computer.Many coating cable samples parallel can be fixed on stretching clamp；The periphery of every coating cable sample is arranged an etching tank；Etching tank includes corrosion-resistant sleeve pipe and rubber stopper, and corrosive medium is filled in the cavity between corrosion-resistant sleeve pipe and coating cable sample；Fujinon electronic video endoscope can be imaged and shot to the surface of coating cable sample；Acoustic emission monitoring system includes acoustic emission device, sound emission harvester and the acoustic emission probe equal with coating cable sample quantities.The present invention can effectively monitor crack initiation moment and the crack growth rate of coating cable sample, and can search out the optimum film thickness under different stress amplitudes, extend cable coating service life, reduce economic loss.
Description
Technical field
The present invention relates to the health monitoring technique field of longspan structure in civil engineering structure, particularly a kind of sound emission
Detect the experimental rig of cable corrosion of coating fatigue crack initiation and extension.
Background technology
Line structure is widely used among Longspan Bridge and building structure, cable as main load-bearing and power transmission structure
Part, its mechanical property research has obtained increasingly extensive concern.But line structure is constantly exposed in natural environment, and for a long time
The effect of external load is born, line structure often produces the damage -forms such as burn into cracking, fatigue damage.Although, in actual work
Cheng Zhong, plates metal protective film in cable matrix face, such as galvanizing, Aluminum Coating and titanizing silver coating, is coated with metal coating
The line structure of film is formed typical film/matrix system.
However, due to film and the difference of steel as matrix material performance, under corrosive environment and dynamic load long term, corrosion
Fatigue damage constantly adds up in coating, and when damage exceedes critical value, crackle begins to germinating.Therefore lot of domestic and foreign is caused
Cable does not reach 30 years service life, it has to change rope ahead of time, so as to cause great economic loss.
Further, since material corrosion product is wedged in crack tip, crack tip stress raisers are caused, even if outer lotus
Carry and disappear, crackle can also continue to extend, and cause the failure behaviours such as cracking and unsticking.
Therefore, the monitoring of cracking behaviors is carried out under corrosion fatigue environment to cable coating, prevents the cracking of coating and subtracts
The few damage of matrix in the environment, it is significant for the life-span and reduction economic loss of extension line structure.
At present, the method that can effectively monitor cable coating crack initiation and propagation is less, according to boundary-layer theory and fracture
, there is a critical film thickness in theory of mechanics, if film thickness is less than critical thickness, crackle is not in then.Therefore, grind
The coating crack development rule studied carefully under corrosion fatigue operating mode is necessary.Optimum film thickness is obtained, extension cable coating is used
In the life-span, reduce economic loss.Therefore, applicants have invented a kind of simply and effectively tired with acoustic emission detection cable corrosion of coating
The experimental rig of labor crack initiation and propagation.
The content of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of acoustic emission detection cable
Rope corrosion of coating fatigue crack initiation and extension experimental rig, the acoustic emission detection cable corrosion of coating fatigue crack initiation and
The experimental rig of extension can effectively monitor crack initiation moment and the crack growth rate of coating cable sample, and can search out
Optimum film thickness under different stress amplitudes, extends cable coating service life, reduces economic loss.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension, including fatigue tester, drawing
Stretch fixture, etching tank, corrosive medium, acoustic emission monitoring system, fujinon electronic video endoscope and computer；Acoustic emission monitoring system and electronics
Endoscope is connected with computer.
The Loaded contact analysis of fatigue tester includes sine wave, and the stress ratio of fatigue tester can be adjusted.
Stretching clamp includes the upper stretching gland and lower stretching gland being coaxially disposed, and lower stretching gland is connected to tired
On the base of labor testing machine, upper stretching gland is connected to the stretching pressure head bottom of fatigue tester, stretches the height energy of pressure head
Enough liftings.
Many coating cable samples, which can be parallel to each other, to be fixed between stretching gland and lower stretching gland.
The periphery of every coating cable sample is arranged an etching tank respectively.
Each etching tank includes corrosion-resistant sleeve pipe and two rubber stoppers, and two rubber stoppers distinguish sealing blocking corrosion-resistant
The two ends of sleeve pipe；Coating cable sample is passed through from two rubber stoppers in correspondence etching tank respectively, is set in corrosion-resistant sleeve pipe
Coating cable sample periphery.
Corrosive medium is filled in the cavity between corrosion-resistant sleeve pipe and coating cable sample.
Fixed fujinon electronic video endoscope on the internal face of every corrosion-resistant sleeve pipe, fujinon electronic video endoscope can be to coating
The surface of cable sample is imaged and shot.
Acoustic emission monitoring system includes acoustic emission device, sound emission harvester and equal with coating cable sample quantities
Acoustic emission probe.
Acoustic emission device is used to launch elastic wave signal to every coating cable specimen surface.
One acoustic emission probe, each sound hair are respectively set on the every coating cable sample outside corrosion-resistant sleeve pipe
Probe is penetrated with sound emission harvester to be connected.
The shape of every coating cable sample is two ends thick middle thin dog-bone shapes or dumbbell shape.
The corrosive medium is Nacl solution, and the concentration range of Nacl solution is 4-6%, and pH range is 6.5-7.2.
Corrosion-resistant sleeve pipe is lucite sleeve pipe.
It can be parallel to each other between upper stretching gland and lower stretching gland and fix three coating cable samples.
Also include calibrator, the calibrator can be measured to the thickness of coating of coating cable specimen surface.
The present invention has the advantages that using after said structure：
1. the present invention is put into coating cable sample, by corrosion-resistant sleeve pipe two by setting Nacl solution in corrosion-resistant sleeve pipe
Sealing, acoustic emission probe is filled in coating cable specimen surface, carries out tired tension test.
2. film/base system that the present invention can be constituted effectively for different coating and different model cable steel matrix is carried
For observation.The film breaks mechanism under Nacl solution salt fog corrosive environments and different fatigue load action is measured, surface is obtained
At the germinating moment of crackle and Interface Crack, find the optimal critical thickness of coating cable specimen surface coating under different stress amplitudes.
3. the corrosion-resistant sleeve pipe in the present invention is organic clear glass, resisting salt fog corrosion can be observed effectively in test
The extension of coating cable specimen surface crackle, acoustic emission probe can effectively monitor the beginning of coating cable specimen surface crackle with
Spreading rate.
Brief description of the drawings
Fig. 1 is that the structure of the experimental rig of acoustic emission detection cable corrosion of coating fatigue crack initiation of the present invention and extension is shown
It is intended to.
Fig. 2 shows the structural representation of coating cable sample.
Wherein have：1. corrosion-resistant sleeve pipe；2. coating cable sample；3. rubber stopper；4. fatigue tester；41. on stretching it is solid
Determine head；42. lower stretching gland；43. stretch pressure head；5. corrosive medium；6. acoustic emission probe；7. acoustic emission device；8. sound is sent out
Penetrate harvester；9. computer；10. fujinon electronic video endoscope.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension, including
Fatigue tester 4, stretching clamp, etching tank, corrosive medium 5, acoustic emission monitoring system, fujinon electronic video endoscope 10 and computer 9.
Wherein, acoustic emission monitoring system and fujinon electronic video endoscope are connected with computer.
Fatigue tester is prior art, is market purchase, and the Loaded contact analysis of fatigue tester includes sine wave, fatigue examination
Testing the stress ratio of machine can be adjusted.
Cable is as the supporting member of bridge, and the deadweight of all superstructures and live load undertake by cable, but perseverance living
Than general only 10% or so, the reason for cable is destroyed is corrosion fatigue, is first to corrode, and induces the generation of fatigue crack.Institute
So that Loaded contact analysis is sine wave, and stress ratio is preferably chosen as 0,0.1 or 0.2；Experiment selects a kind of stress ratio every time.Often
10 circulations of second, i.e. f=10HZ.
Stretching clamp includes the upper stretching gland 41 being coaxially disposed and lower stretching gland 42.
Lower stretching gland is preferably detachably connected on the base of fatigue tester, and upper stretching gland is preferably detachable
The bottom of stretching pressure head 43 of fatigue tester is connected to, the height of stretching pressure head can be lifted.
Many coating cable samples 2, which can be parallel to each other, to be fixed between stretching gland and lower stretching gland.
It can be preferably parallel to each other between upper stretching gland and lower stretching gland and fix three coating cable samples.
The shape of every coating cable sample is both preferably two ends as shown in Figure 2 thick middle thin dog-bone shapes or dumbbell
Shape, can increase end resistant slide ability, the convenient development for investigating coating crack in the middle part of test specimen.
In addition, it can be seen from boundary-layer theory and Theory of Fracture Mechanics, because cable coating is in the Critical fracture of dead load
Less, displacement is approximate between multiple coating cable samples for tensile stress, thus, in fatigue experiment, many coating can be realized
Cable sample is loaded simultaneously.
The present invention coating cable sample coating layer thickness be preferably 0.08mm, 0.12mm, 0.16mm, 0.20mm or
0.24mm。
Further, experimental rig of the invention further preferably includes calibrator, and the calibrator can be to above-mentioned coating cable specimen surface
Thickness of coating measure.
The periphery of every coating cable sample is arranged an etching tank respectively.
Each etching tank includes corrosion-resistant sleeve pipe 1 and two rubber stoppers 3.
Corrosion-resistant sleeve pipe is preferably lucite sleeve pipe.
Two rubber stoppers distinguish sealing blocking at the two ends of corrosion-resistant sleeve pipe；Coating cable sample is respectively from correspondence etching tank
In two rubber stoppers pass through, corrosion-resistant sleeve pipe is set in coating cable sample periphery.
It is in sealing contact that coating cable sample, which is moreed than between two rubber stoppers, can there is less slide displacement.
Corrosive medium 5 is filled in the cavity between corrosion-resistant sleeve pipe and coating cable sample.
Above-mentioned corrosive medium is preferably Nacl solution, and the concentration range of Nacl solution is preferably 4-6%, more preferably
5%.PH range is preferably 6.5-7.2；The Nacl solution of the present invention, can be simulated under national various coastal area environment completely
Corrosion condition.
Fixed fujinon electronic video endoscope 10 on the internal face of every corrosion-resistant sleeve pipe, fujinon electronic video endoscope preferably can be 180 °
Rotate, realize and the surface of coating cable sample is imaged and shot.Fujinon electronic video endoscope is connected with computer, so can be by
Captured picture or shooting sends computer to, and built-in computer has three-dimensional shooting software and scale, can automatic discrimination picture
In crackle and crack length.
Acoustic emission monitoring system include acoustic emission device 7, sound emission harvester 8 and with coating cable sample quantities phase
Deng acoustic emission probe 6.
One acoustic emission probe is respectively set on the every coating cable sample outside corrosion-resistant sleeve pipe, and each sound emission is visited
Head is connected with sound emission harvester.
Above-mentioned acoustic emission probe, can realize the monitoring simultaneously to multiple coating cable specimen surface coatings.Ground according to early stage
Study carefully, the parameters to sound emission harvester are configured, with a width of 10KHz-2.0MHz, gain is set to 40dB, threshold
Value 35dB, sample frequency 5MSPS.
Acoustic emission device is used to launch elastic wave signal to every coating cable specimen surface.
Acoustic emission monitoring system detects that the principle of crackle is：The elastic wave of acoustic emission device transmitting is eventually spread to reach coating
The surface of cable sample, the surface displacement for causing acoustic emission probe to detect, when coating surface Fatigue crack initiation, can cause
The mechanical oscillation of coating material are converted to electric signal by the energy release of coating cable sample clock coating material, acoustic emission probe,
Then it is exaggerated, handle and records again.
A kind of acoustic emission detection cable corrosion of coating fatigue crack initiation and the test method of extension, comprise the following steps.
Step 1, coating cable sample makes.
Before the making of coating cable sample, pickling first is carried out to cable steel matrix, oxide film on steel surface is removed, dries, then
The coating of the different-thickness of research needed for plating, and the actual plating thickness of each coating cable sample is measured with calibrator respectively
Degree.
Some of the coating cable sample of five kinds of different thickness of coating is taken, wherein, the length phase of every coating cable sample
Deng the size and dimension per cables steel matrix is identical.
Five kinds of above-mentioned coating cable sample different thickness of coating, be respectively preferably 0.08mm, 0.12mm, 0.16mm,
0.20mm and 0.24mm.
Step 2, Critical fracture pulling force is found：The coating cable examination for five kinds of different thickness of coating that step 1 is completed
Sample respectively takes 1-3 roots, using fatigue tester, according to the fixed displacement value of setting, static(al) tension test is carried out respectively, obtains every kind of
Plate Critical fracture pulling force during fault rupture；Due to five kinds of different thickness of coating coating cable samples Critical fracture pulling force difference compared with
It is small, therefore the average of all Critical fracture pulling force obtained by static(al) tension test is taken as the Critical fracture pulling force N of required searchingL。
Step 3, corrosive medium is configured：Configuration concentration scope is 4-6%, preferably 5%；PH range is 6.5-7.2's
Nacl solution.
In the present invention, different salt fogs can be carried out when keeping coating cable sample thickness and load stress keeps constant
The experiment of corrosive environment, different concentration of sodium chloride solution and different PH, to choose optimal corrosive environment, optimal chlorination
Sodium solution concentration and optimal pH value.The pH value of sodium chloride solution, 4-6% concentration and 6.5-7.2 in the present invention, then be application
People passes through for a long time, draw after repeated tests checking, can simulate completely under national various coastal area environment
Corrosion condition.
Step 4, corrosive medium is loaded：Corrosive medium is loaded, including following two steps.
Step 41, it is set with corrosion-resistant sleeve pipe.
1）Three corrosion-resistant sleeve pipes are taken, fixed one is connected with computer on the internal face of every corrosion-resistant sleeve pipe
Fujinon electronic video endoscope.
2）One end of three corrosion-resistant sleeve pipes is blocked with rubber stopper seal respectively, the middle part of each rubber stopper is preferably set
It is equipped with punching.Being provided with the corrosion-resistant sleeve pipe of fujinon electronic video endoscope can repeatedly use, and utilization rate is high.
3）The one of which thickness of coating for taking step 1 to make（Such as 0.08mm）Three, coating cable sample, such as plating thickness
Spend three, the coating cable sample for 0.08mm.
4）Three coating cable samples are sequentially passed through after rubber stopper, load corrosion-resistant sleeve pipe, and corrosion-resistant sleeve pipe is hung down
Straight to place, the two ends of coating cable sample are exposed from corrosion-resistant sleeve pipe, and one end that sealing blocking has rubber stopper is located at bottom.
Step 42, corrosive medium is loaded：Be sequentially loaded into step 31 three of the corrosive medium that step 2 is configured are corrosion-resistant
In sleeve pipe, after filling, then with rubber stopper pass through coating cable sample top after, three corrosion-resistant cannula tips are sealed into envelope
It is stifled.
Step 5, coating cable specimen clamping：Step 3 corrosive medium is loaded to the three coating cable samples completed, respectively
It is fixed in parallel to each other between stretching gland and lower stretching gland；Then, in every outside corrosion-resistant sleeve pipe
One acoustic emission probe is respectively installed on coating cable sample, and all acoustic emission probes are connected with sound emission harvester
Connect, sound emission harvester is connected with computer.
Acoustic emission probe is with the preferred installation method of corresponding coating cable sample：First by acoustic emission probe vaseline with
Coating cable specimen surface is coupled, and is then adhesively fixed with adhesive plaster, it is ensured that acoustic emission probe does not go out during loading
Now peel off and slide.Deformation or energy to failure produced by material or structure are under by external force load action can be with elastic waves
Form release elasticity can, through Medium Propagation reach coating cable specimen surface, cause the machinery of coating cable specimen surface to shake
It is dynamic.Acoustic emission probe can receive this signal and be converted to electric signal.
Step 6, fatigue test：Fatigue test, comprises the following steps.
Step 61, elastic wave is launched：The acoustic emission device being connected with computer is first opened, acoustic emission device starts to step
Three coating cable sample emissions elastic waves that rapid 4 clamping is completed.
Step 62, stress amplitude is horizontally disposed with：The horizontal quantity of stress amplitude, which is set, is no less than 6, is respectively：NL/2、（NL/2±
NL/10）、（NL/2±2NL/10）、（NL/2±3NL/10）…….
Step 63, fatigue stress is loaded：Fatigue tester is worked, and three coating cables that step 4 clamping is completed are tried
Sample carries out fatigue test, wherein, the Loaded contact analysis of fatigue tester is sine wave, and loading stress ratio is 0.1, the choosing of stress amplitude level
It is selected as NL/2.
When fatigue tester is loaded, cable steel matrix is elastic deformation, and the coat of metal in cable steel matrix then can
It is plastically deformed.During unloading, the coat of metal has been plastically deformed, can be by a cable steel matrix elastic recovery to film
Compression, so need to only apply La-drawing fatigue load or the load of drawing-zero.
Step 64, sound emission feedback profile is formed：During fatigue test, sound emission harvester passes through three sound emissions
Probe, gathers the sound emission feedback signal of three coating cable samples respectively, and forms sound emission feedback profile, sound emission feedback
Curve includes sound emission ring curve and acoustic emission energy curve, wherein, sound emission ring curve is that sound emission harvester is adopted
The Ring-down count or stored count versus time curve of collection, acoustic emission energy curve are the sound that sound emission harvester is gathered
The energy value versus time curve of transmission signal.
Step 65, Identification of Cracks and length computation：While sound emission feedback profile is formed, fujinon electronic video endoscope will be real-time
The coating cable specimen surface being pointed in corrosion-resistant sleeve pipe is imaged and sends computer to, computer at regular intervals when
Between, preferably five minutes, a picture shooting is carried out, and Identification of Cracks judgement and crack length meter are carried out to the picture of shooting
Calculate.
Step 7, the crack initiation moment is recorded：In the sound emission feedback profile of step 64 formation, when ring surge, namely
When acoustic emission signal is sharply increased, corresponding time point is the crack initiation moment of coating.
After the completion of the crack initiation moment record of coating, the crack length value at crack initiation moment is recorded by step 64,
And ask for the fracture toughness of correspondence coating.
Step 8, crack expansion test：After step 7 recorded the crack initiation moment, fatigue tester continues according to step
63 mode carries out load test, untill crackle saturation occurs in coating cable specimen surface；In crack expansion test, still need to
Continue collection and record the sound emission feedback profile of three coating cable samples；When crackle reaches saturation, the stress applied
Cycle-index is that this kind of thickness coating cable sample is N in stress amplitudeLCorrosion of coating fatigue life when/2.
Step 9, crack growth rate is assessed：Crackle expansion is carried out using any of appraisal procedure as described below or combination
Open up the assessment of speed.
Appraisal procedure one, crack growth rate qualitative evaluation：To the sound hair in the sound emission feedback profile that is recorded in step 8
Penetrate ring curve, by the density situation of change of sound emission Ring-down count or accumulative ring number with the time, On Crack Propagation it is fast
Slow degree carries out qualitative evaluation.
Appraisal procedure two, crack growth rate qualitative assessment one：Paris formula in fatigue theory, Crack Extension
Speed is the crack growth amount of load cycle once.
Appraisal procedure three, crack growth rate qualitative assessment two：To the sound in the sound emission feedback profile that is recorded in step 8
Emitted energy curve, crack growth rate is the acoustic emission energy variable quantity of load cycle once.
Step 10, S-N curves are drawn：In the case where thickness of coating, Loaded contact analysis and loading stress ratio are constant, according to
Step 3 obtains crack initiation moment, crack growth rate respectively to the method for step 9 to every kind of stress amplitude that step 63 is selected
And corrosion of coating fatigue life value；And according to all stress amplitudes and corrosion of coating fatigue life value, draw this kind of coating
S-N curves corresponding to thickness.
Step 11, optimal thickness of coating is found：By other four kinds different thickness of coating in step 1（Such as 0.12mm,
0.16mm, 0.20mm and 0.24mm）Coating cable sample respectively take some, to the coating cable sample point of every kind of thickness of coating
Do not operated according to the method for step 3 to step 10, and record every kind of thickness of coating respectively in each stress amplitude level when institute
Corresponding crack initiation moment, crack growth rate and S-N curves, during by crack initiation corresponding to five kinds of different thickness of coating
Carve, crack growth rate and S-N curves are compared, and obtain optimal thickness of coating corresponding under every kind of stress amplitude level.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (6)
1. a kind of acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension, it is characterised in that：Including
Fatigue tester, stretching clamp, etching tank, corrosive medium, acoustic emission monitoring system, fujinon electronic video endoscope and computer；Sound emission
Monitoring system and fujinon electronic video endoscope are connected with computer；
The Loaded contact analysis of fatigue tester includes sine wave, and the stress ratio of fatigue tester can be adjusted；
Stretching clamp includes the upper stretching gland and lower stretching gland being coaxially disposed, and lower stretching gland is connected to tired examination
Test on the base of machine, upper stretching gland is connected to the stretching pressure head bottom of fatigue tester, the height of stretching pressure head can rise
Drop；
Many coating cable samples, which can be parallel to each other, to be fixed between stretching gland and lower stretching gland；
The periphery of every coating cable sample is arranged an etching tank respectively；
Each etching tank includes corrosion-resistant sleeve pipe and two rubber stoppers, and two rubber stoppers distinguish sealing blocking in corrosion-resistant sleeve pipe
Two ends；Coating cable sample is passed through from two rubber stoppers in correspondence etching tank respectively, corrosion-resistant sleeve pipe is set in coating
Cable sample periphery；
Corrosive medium is filled in the cavity between corrosion-resistant sleeve pipe and coating cable sample；
Fixed fujinon electronic video endoscope on the internal face of every corrosion-resistant sleeve pipe, fujinon electronic video endoscope can be to coating cable
The surface of sample is imaged and shot；
Acoustic emission monitoring system includes acoustic emission device, sound emission harvester and the sound equal with coating cable sample quantities
Transmitting probe；
Acoustic emission device is used to launch elastic wave signal to every coating cable specimen surface；
One acoustic emission probe is respectively set on the every coating cable sample outside corrosion-resistant sleeve pipe, and each sound emission is visited
Head is connected with sound emission harvester.
2. acoustic emission detection cable corrosion of coating fatigue crack initiation according to claim 1 and the experimental rig of extension,
It is characterized in that：The shape of every coating cable sample is two ends thick middle thin dog-bone shapes or dumbbell shape.
3. acoustic emission detection cable corrosion of coating fatigue crack initiation according to claim 1 and the experimental rig of extension,
It is characterized in that：The corrosive medium is Nacl solution, and the concentration range of Nacl solution is 4-6%, and pH range is 6.5-
7.2。
4. acoustic emission detection cable corrosion of coating fatigue crack initiation according to claim 1 and the experimental rig of extension,
It is characterized in that：Corrosion-resistant sleeve pipe is lucite sleeve pipe.
5. acoustic emission detection cable corrosion of coating fatigue crack initiation according to claim 1 and the experimental rig of extension,
It is characterized in that：It can be parallel to each other between upper stretching gland and lower stretching gland and fix three coating cable samples.
6. acoustic emission detection cable corrosion of coating fatigue crack initiation according to claim 1 and the experimental rig of extension,
It is characterized in that：Also include calibrator, the calibrator can be measured to the thickness of coating of coating cable specimen surface.
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| CN108489824A (en) * | 2018-04-04 | 2018-09-04 | 上海凯尔孚应力腐蚀试验设备有限公司 | Multi-axial Loading stress corrosion (cracking) test equipment |
| CN110568083A (en) * | 2019-09-27 | 2019-12-13 | 中北大学 | acoustic emission detection method for online monitoring of corrosion fatigue damage of steel |
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| CN112033989A (en) * | 2020-09-23 | 2020-12-04 | 西安热工研究院有限公司 | Method for judging crack formation time of surface of coated metal substrate |
| CN112748007A (en) * | 2020-12-29 | 2021-05-04 | 长沙理工大学 | Corrosion-resistant fatigue performance testing device based on acoustic emission |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201803903U (en) * | 2010-09-19 | 2011-04-20 | 航天科工防御技术研究试验中心 | Aluminum alloy tensile stress corrosion test device |
| CN102288492A (en) * | 2011-07-01 | 2011-12-21 | 中国科学院金属研究所 | High-temperature and high-pressure circulating water constant-load extension experimental device with acoustic emission testing function |
| CN104007058A (en) * | 2014-06-13 | 2014-08-27 | 东南大学 | Portable type metal wire stretching stress corrosion testing device |
| CN104266909A (en) * | 2014-10-16 | 2015-01-07 | 河海大学 | Corrosion experimental device for metal material under constant stress action |
| CN105973690A (en) * | 2016-04-28 | 2016-09-28 | 西安交通大学 | Multi-field coupled environment simulating and online monitoring/observing system |
-
2017
- 2017-04-25 CN CN201710277319.2A patent/CN107101885A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201803903U (en) * | 2010-09-19 | 2011-04-20 | 航天科工防御技术研究试验中心 | Aluminum alloy tensile stress corrosion test device |
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