CN108562506A - High frequency in situ imaging fatigue tester - Google Patents
High frequency in situ imaging fatigue tester Download PDFInfo
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- CN108562506A CN108562506A CN201810304049.4A CN201810304049A CN108562506A CN 108562506 A CN108562506 A CN 108562506A CN 201810304049 A CN201810304049 A CN 201810304049A CN 108562506 A CN108562506 A CN 108562506A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 32
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 58
- 238000000429 assembly Methods 0.000 claims abstract description 49
- 230000000712 assembly Effects 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 230000009471 action Effects 0.000 claims abstract description 18
- 230000005469 synchrotron radiation Effects 0.000 claims description 35
- 230000003287 optical effect Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 14
- 238000011160 research Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004154 testing of material Methods 0.000 abstract description 2
- 238000009661 fatigue test Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000012769 display material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000012546 transfer 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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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
-
- 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
- G01N2203/0005—Repeated or cyclic
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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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
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
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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
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to Material Testing Technology fields, and in particular to a kind of high frequency in situ imaging fatigue tester comprising：Testing machine body, sample clamping mechanism, preset power load maintainer and voice coil motor.For sample clamping mechanism for gripping sample, sample clamping mechanism includes the first clamp assemblies and the second clamp assemblies being oppositely arranged.Preset power load maintainer is set to the first clamp assemblies side of sample clamping mechanism, and pressure is preset for applying to sample.Voice coil motor is fixedly connected on testing machine body, and the action shaft of voice coil motor is connected to the second clamp assemblies.It realizes high frequency start by voice coil motor, and high-cycle fatigue is carried out to sample, and three-dimensional imaging, and then the high Zhou Naizhi super high cycle fatigues inefficacy mechanism of research material are carried out to material internal fatigue damage using sigmatron.
Description
Technical field
The present invention relates to Material Testing Technology fields, in particular to a kind of high frequency in situ imaging fatigue tester.
Background technology
Material and the key issues that structural fatigue is that academic and engineering circles are paid close attention to for a long time, traditional light microscope and electronics
The methods of microscope is only capable of obtaining material surface fatigue crack, and three-dimensional fatigue crack caused by internal porosity, slag inclusion, tissue etc.
And its coupling behavior and surface it is entirely different.In situ fatigue test machine is combined with advanced synchrotron radiation X-ray imaging technique
Enable scientist to be deep into material internal, non-destructive and the process in situ for detecting fatigue damage and fracture in real time and its
Development law.But traditional fatigue tester selects stepper motor as driving device, and there are less efficient, hairs for stepper motor
It is hot big, sometimes " step-out " the shortcomings of, there is backlass, effect of inertia, friction effects and rigidity in machine driving not
The problems such as sufficient.And traditional fatigue tester loading frequency is relatively low, and Fatigue Test Time is long, and synchrotron radiation light source is made
For the multidisciplinary top research device of large size, user generally carries out low-cycle fatigue both at home and abroad at present using there is stringent limitation when machine again
Experiment.
With the development of science and technology the machine industries such as Aeronautics and Astronautics, express locomotive to the fatigue strength of parts material,
Fatigue life requirements are higher and higher, such as the critical component fatigue life of the bullet train modern means of communication will generally reach 107
The turbogenerator of cycle or more, aerospace craft even will reach 1010Cycle.The height week of research material and super high cycle fatigue
Inefficacy mechanism is significant, and these also propose the loading frequency of fatigue tester and operational reliability new requirement.Greatly
The low cycle fatigue test frequency of load is between 0.1-50Hz, and high frequency test frequency is within the scope of 50-300Hz.It is existing
In situ imaging fatigue tester can only carry out low cycle fatigue test.
Therefore, there is an urgent need for a kind of in situ imaging fatigue testers that can carry out high week and super high cycle fatigue.
Invention content
The purpose of the present invention is to provide a kind of high frequency in situ imaging fatigue testers, can complete high frequency to material
It is well compatible with synchrotron radiation light source test platform while fatigue test, the three-dimensional image of material internal is obtained, and try
Testing machine has feature simple in structure, small.
What the embodiment of the present invention was realized in：
A kind of high frequency in situ imaging fatigue tester provided by the invention comprising：
Testing machine body；
Sample clamping mechanism；For gripping sample, sample clamping mechanism includes the first clamp assemblies being oppositely arranged
With the second clamp assemblies；
Preset power load maintainer；Preset power load maintainer is set to the first clamp assemblies side of sample clamping mechanism, uses
Pressure is preset in applying to sample；
Voice coil motor；Voice coil motor is fixedly connected on testing machine body, and the action shaft of voice coil motor is connected to the second folder
Hold component.
In preferred embodiments of the present invention, above-mentioned testing machine body includes tester base and testing machine bearing, experiment
Machine base and testing machine bearing are detachably connected with, and are formed between tester base and testing machine bearing for accommodating voice coil motor
Installation cavity, the action shaft of voice coil motor connect across testing machine bearing with the second clamp assemblies.
In preferred embodiments of the present invention, above-mentioned voice coil motor is provided with buffering in the both sides of action shaft axis direction
Pad.
In preferred embodiments of the present invention, above-mentioned preset power load maintainer includes threaded rod and threaded support cylinder, screw thread
Support tube is rotationally connected with testing machine body, and threaded support jacket casing is set to threaded rod, and threaded support cylinder and threaded rod screw thread are matched
It closes, one end of threaded rod is connected to the first clamp assemblies.
In preferred embodiments of the present invention, above-mentioned preset power load maintainer further includes thrust bearing, and thrust bearing is arranged
In threaded support cylinder, threaded support cylinder is rotatablely connected by thrust bearing in testing machine body.
In preferred embodiments of the present invention, the outer wall of above-mentioned threaded support cylinder is provided with annular flange, and thrust axis is contracted
The first thrust bearing and the second thrust bearing are included, the first thrust bearing and the second thrust bearing are respectively arranged at the two of annular flange
Side.
In preferred embodiments of the present invention, above-mentioned first clamp assemblies include being oppositely arranged along the direction of default pressure
Two the first clamping members, the second clamp assemblies include two the second clamping pieces being oppositely arranged along the direction of default pressure,
The first clip cavity for clamping sample is formed between two the first clamping members, is formed between two the second clamping pieces for clamping examination
Second clip cavity of sample；A first clamping member in relatively close second clamp assemblies of two the first clamping members offers the first peace
Tankage, the first mounting groove extend to the centre position of the first clamping member, two the second clamping piece phases from the edge of the first clamping member
Second mounting groove offered to second clamping piece in the first clamping member, the second mounting groove is from the side of the second clamping piece
Edge extends to the centre position of the second clamping piece.
In preferred embodiments of the present invention, above-mentioned two the first clamping member is relatively distant from one of the second clamp assemblies
One clamping piece is provided with is relatively distant from the first clamp assemblies with matched first groove in one end of sample, two the second clamping pieces
One the second clamping piece is provided with and matched second groove of the other end of sample.
In preferred embodiments of the present invention, above-mentioned high frequency in situ imaging fatigue tester further includes surrounding sample holder machine
Synchrotron radiation light source optical transmitting set and synchrotron radiation light source light-receiving in translucent cover opposite sides is arranged in the translucent cover of structure setting
Device and synchrotron radiation light source platform, testing machine body are rotationally connected with synchrotron radiation light source platform.
In preferred embodiments of the present invention, above-mentioned high frequency in situ imaging fatigue tester further includes data acquisition and control
Device and flat with translucent cover, synchrotron radiation light source optical transmitting set, synchrotron radiation light source optical receiver and synchrotron radiation light source
The high frequency in situ imaging fatigue tester of platform, voice coil motor, synchrotron radiation light source and optical receiver are acquired and are controlled with data
Device communicates to connect.
The advantageous effect of the embodiment of the present invention is：Using voice coil motor as driving device, voice coil motor has high-frequency, height
The features such as precision, high-speed response, high transmission stiffness, stable thrust, high reliability, long lifespan.Electric energy can directly be converted
Be in line the mechanical energy of movement, and then all machine drivings being omitted between motor and fixture, realizes motor and fixture
Between direct-drive, test frequency can reach 50Hz or more, realizes high frequency start, and then carry out high-cycle fatigue to sample,
The high Zhou Naizhi super high cycle fatigues inefficacy mechanism of research material.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of the high frequency in situ imaging fatigue tester of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram for the sample that the high frequency in situ imaging fatigue tester of the embodiment of the present invention is detected；
Fig. 3 is that the structural schematic diagram of sample is clamped in the second clamp assemblies of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the second clamping piece in the embodiment of the present invention；
Fig. 5 is the cross-sectional view of the preset power load maintainer of the embodiment of the present invention.
In figure：10- high frequency in situ imaging fatigue testers；100- testing machine bodies；110- tester bases；120- is tested
Machine bearing；130- fixed plates；140- support tubes；150- head covers；160- bearing glands；200- sample clamping mechanisms；210- first
Clamp assemblies；210a- the first clamping members；210b- the first clamping members；The second clamp assemblies of 220-；The second clamping pieces of 220a-；
The second clamping pieces of 220b-；The second mounting grooves of 221-；The second grooves of 222-；230- adjustment disks；The preset power load maintainers of 300-；
310- threaded rods；320- threaded support cylinders；The first thrust bearings of 330a-；The second thrust bearings of 330b-；340- lock-screws；
350- release handles；360- load transducers；400- voice coil motors；410- start shaft coupling pieces；420- cushion pads；510- is transparent
Cover；520- synchrotron radiation light source optical transmitting sets；530- synchrotron radiation light source optical receivers；540- synchrotron radiation light source platforms；
600- data acquire and control device；700- shows equipment；800- samples.
Specific implementation mode
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
Referring to attached drawing 1, a kind of high frequency in situ imaging fatigue tester 10 provided in an embodiment of the present invention comprising：Experiment
Machine body 100, sample clamping mechanism 200, preset power load maintainer 300 and voice coil motor 400.
Wherein, sample clamping mechanism 200 includes being oppositely arranged for gripping sample 800, sample clamping mechanism 200
First clamp assemblies 210 and the second clamp assemblies 220.Preset power load maintainer 300 is set to the first of sample clamping mechanism 200
Pressure is preset in 210 side of clamp assemblies for applying to sample 800.Voice coil motor 400 is fixedly connected on testing machine body
100, and the action shaft of voice coil motor 400 is connected to the second clamp assemblies 220.
The both ends of sample 800 are clamped respectively by the first clamp assemblies 210 and the second clamp assemblies 220, then are led to
It crosses preset power load maintainer 300 one end of sample 800 is applied and preset pressure, and after so that pressure is remained unchanged.Pass through again
The action shaft of voice coil motor 400 drives the second clamp assemblies 220 to apply the displacement load of axial reciprocating to sample 800, to come
Complete the fatigue test of materials of high frequency.By having installed preset power load maintainer 300 additional, can prevent during testing because of high frequency
The variation of loading force is vibrated and caused, keeps loading force more reliable and more stable.
Referring to attached drawing 1, testing machine body 100 is the main support construction of equipment, and structure can be closed as needed
Physics and chemistry is arranged, and in the present embodiment, testing machine body 100 includes tester base 110 and testing machine bearing 120, tester base
110 and testing machine bearing 120 be detachably connected with, and between tester base 110 and testing machine bearing 120 formed for accommodating sound
The installation cavity of motor 400 is enclosed, the action shaft of voice coil motor 400 is connect across testing machine bearing 120 with the second clamp assemblies 220.
Specifically, in the present embodiment, tester base 110 is barrel-shaped, and upper part is provided with opening, for voice coil is electric
Machine 400 is placed into tester base 110 from upper opening and is installed.Testing machine bearing 120 is used for testing machine bottom
The upper opening of seat 110 is closed, so that voice coil motor 400 can be by limitation mounted on the inside of tester base 110.
Pass through stud detachable connection between tester base 110 and testing machine bearing 120.110 upper opening one of tester base
The end face at end offers multiple threaded holes, the surrounding of testing machine bearing 120 offer with it is multiple on 110 end face of tester base
The tapped through hole of threaded hole corresponding matching.After the installation corresponding with tester base 110 of testing machine bearing 120 is placed, then pass through
Stud passes through corresponding tapped through hole and threaded hole, and tester base 110 and testing machine bearing 120 are firmly attached and are fixed on
Together, so that when voice coil motor 400 works, the stability of testing machine body 100 is more preferable.
With further reference to attached drawing 1, in this example, testing machine body 100 further includes that 130 fixed plate 130 of fixed plate is set to
Voice coil motor 400 is clamped for the one end of voice coil motor 400 far from testing machine bearing 120, fixed plate 130 and testing machine bearing 120
It fixes between, fixed plate 130 and testing machine bearing 120 are fixed by long threaded rod.To which voice coil motor 400 can
What is consolidated is fixed on the bottom of testing machine bearing 120 so that the bottom of voice coil motor 400 is hanging, avoids voice coil motor
400 occur rigid collision when working condition is vibrated between tester base 110.When installation, first by voice coil motor 400
It is fixedly mounted between testing machine bearing 120 and fixed plate 130, testing machine bearing 120 is then mounted on tester base again
On 110 so that voice coil motor 400 is located at the inside of tester base 110.
Further, in this embodiment voice coil motor 400 is provided with cushion pad 420 in the both sides of action shaft axis direction.
Cushion pad 420 is mounted on the both sides of voice coil motor 400, and the cushion pad 420 of side can be contacted with testing machine bearing 120,
The cushion pad 420 of other side can be contacted with fixed plate 130, therefore, because voice coil motor 400 makees dynamic frequency height, both sides are set
The cushion pad 420 set can obstruct high-frequency vibration, reduce noise, and structure is made more to stablize.The pad of cushion pad 420 of both sides can simultaneously
In fatigue test, to bear pressure, to generate deformation, the displacement of part action shaft is offset.In real process, sample
800 stress deformation very little, and the amplitude of action shaft is mm grades, pretends moving axis and needs displacement buffering when moving back and forth.Mainly
By the thread pitch of each coupling part, the displacement of the generations such as 420 deformation of 800 deformation of sample and cushion pad is offset.The present embodiment
In, cushion pad 420 is rubber pad, certainly, in other embodiment, cushion pad 420 or foam-rubber cushion etc. other there is elasticity
Cushion.
Referring to attached drawing 1, sample clamping mechanism 200 is the mechanism for gripping sample 800, the both ends quilt of sample 800
It is separately fixed on the first clamp assemblies 210 and the second clamp assemblies 220.First clamp assemblies 210 include along default pressure
The first clamping member 210a that is oppositely arranged of direction and the first clamping member 210b, the second clamp assemblies 220 include along default tension and compression
The the second clamping piece 220a and the second clamping piece 220b that the direction of power is oppositely arranged.Referring to attached drawing 2, in the present embodiment, examined
Promising two clamping parts that can be clamped along its axial direction of two end sets of the sample 800 of survey.Referring again to attached drawing 1,
The first clip cavity of a clamping part for clamping sample 800 is formed between the first clamping member 210a and the first clamping member 210b,
The second folder of another clamping part for clamping sample 800 is formed between second clamping piece 220a and the second clamping piece 220b
Chamber.
Further, the first clamping member 210a in the first clamp assemblies 210 in relatively close second clamp assemblies 220 is opened
Equipped with the first mounting groove, the first mounting groove extends to the interposition of the first clamping member 210a from the edge of the first clamping member 210a
It sets.Referring to attached drawing 3, the second clamping piece 220a in the second clamp assemblies 220 in relatively close first clamp assemblies 210 is offered
Second mounting groove 221, the second mounting groove 221 extend to the interposition of the second clamping piece 220a from the edge of the second clamping piece 220a
It sets.Similarly, structure of the structure of the first mounting groove with reference to the second mounting groove 221.
When carrying out clamping installation sample 800, first one end of sample 800 is placed on the second clamping piece 220b, then
The middle section of sample 800 is slided from the open end of the second mounting groove 221 by the second mounting groove 221 of the second clamping piece 220a
Enter so that sample 800 is located at the centre position of the second clamping piece 220a, and a clamping part of sample 800 is clamped in second
Between clamping piece 220a and the second clamping piece 220b.With further reference to attached drawing 4, opened up on the second clamping piece 220b there are four screw thread
Hole offers corresponding four tapped through holes on the second clamping piece 220a, will one end of sample 800 clamping part be clamped after pass through
Second clamping piece 220a and the second clamping piece 220b is connected and fixed by stud by stud locking.Similarly, sample 800 is another
Clamping part is clamped to the first clamping member 210a also by the first clamping member 210a and the second clamping piece 220b with the above process
Between the first clamping member 210b.
Certainly, in other embodiment, the both ends of sample 800 can also be gripped by other means, the
Correspondence between one clamping piece 210a and the first clamping member 210b and between the second clamping piece 220a and the second clamping piece 220b
Threaded hole and the quantity of tapped through hole may be 3,5 etc., can be also attached by other modes such as axis pins.
Further, referring to being relatively distant from the first clamp assemblies in Fig. 4, the second clamping piece 220a and the second clamping piece 220b
210 the second clamping piece 220b is provided with and matched second groove of the other end of sample 800 222.Similarly, the first clamping member
The first clamping member 210b that the second clamp assemblies 220 are relatively distant from 210a and the first clamping member 210b is provided with and sample 800
Matched first groove in one end.Structure setting of the structure setting of first groove with reference to the second groove 222.Pass through the first groove
With the setting of the second groove 222 so that the both ends of sample 800 can more consolidate and be fixed, it is not easy to radial displacement occur.
Referring to attached drawing 5, in the present embodiment, preset power load maintainer 300 includes threaded rod 310 and threaded support cylinder 320, spiral shell
Line support tube 320 is rotationally connected with testing machine body 100, and threaded support cylinder 320 is sheathed on threaded rod 310, threaded support cylinder
320 and 310 screw-thread fit of threaded rod, one end of threaded rod 310 be connected to the first clamp assemblies 210.Threaded rod 310 and first presss from both sides
The lower part for holding the connection of component 210 is located in support tube 140, and the top of support tube 140 is closed by head cover 150, head cover 150
With 140 detachable connection of support tube, connect specifically, the top of support tube 140 and the edge of head cover 150 pass through stud fixation
It connects.Threaded support cylinder 320 is arranged in the placed cavity in the centre position of head cover 150 so that threaded support cylinder 320 is limited in
On head cover 150, and threaded support cylinder 320 can be rotated relative to head cover 150.It is additionally provided with lock-screw 340 on head cover 150, locks
Screw 340 screws end positioned at the outside of head cover 150, and other end passes through head cover 150 that can rotate and is connected to threaded support cylinder
On 320, to achieve the purpose that lock threaded support cylinder 320.
Sample 800 can be fixed by screw-driven by preset power load maintainer 300, and be adapted to a certain range
The sample 800 of interior different length, it is more adaptable.Realize the fatigue under pulling force.It is in 400 action shaft of voice coil motor after energization
Minimum point makes sample 800 by pulling force by 300 tensile sample 800 of preset power load maintainer, after reaching preset value, tightens locking
Screw 340.Control 400 start of voice coil motor, then the start since minimum point of voice coil motor 400, during upward start,
It is equivalent to the pulling force released on sample 800, makes the reduction of its pulling force.It moves back and forth, to achieve the purpose that pulling force fatigue.Similarly,
After the pulling force on sample 800 is zero, if voice coil motor 400 is not up to peak, voice coil motor 400 continues movement will
Pressure is generated to sample 800.In addition it is also possible to make the action shaft of voice coil motor 400 be at the highest notch after being powered, then by pre-
Power load maintainer 300 is set, sample 800 is compressed, makes sample 800 by pressure.After pressure reaches preset value, lock-screw 340 is tightened.
400 start of voice coil motor is controlled, then the start since peak of voice coil motor 400 is equivalent to and releases during downwards
Pressure on sample 800 makes its pressure reduction.It moves back and forth, to achieve the purpose that pressure fatigue.
Further, referring to Fig. 1, preset power load maintainer 300 further includes release handle 350, in the present embodiment, threaded support
The end of cylinder 320 is cuboid, and release handle 350 is provided with the groove coordinated with the cuboid end of threaded support cylinder 320,
To which release handle 350 to be mounted on the end of threaded support cylinder 320, release handle 350 can be rotated to threaded support cylinder 320 very
It is rotated well.Certainly, in other embodiment, the end of threaded support cylinder 320 can also be arranged to triangular prism, pentagonal prism,
The other shapes such as hexagonal prisms are connect with release handle 350.
With further reference to attached drawing 5, in the present embodiment, preset power load maintainer 300 further includes thrust bearing, thrust axis bearing sleeve
Set on threaded support cylinder 320, threaded support cylinder 320 is rotatablely connected by thrust bearing in testing machine body 100.Specifically, spiral shell
The outer wall of line support tube 320 is provided with annular flange, and thrust bearing includes the first thrust bearing 330a and the second thrust bearing
330b, the first thrust bearing 330a and the second thrust bearing 330b are respectively arranged at the both sides of annular flange.
Using thrust bearing fixed thread support tube 320, reduce unnecessary friction, keeps preset force load lighter；
Threaded rod 310 is driven, and coordinates two thrust bearings so that the either realization of pressure or pulling force in experiment, operation is all more
Simply.Using the uniaxial transmission of threaded rod 310, ensure the concentricity of loading force and 800 axis of sample, and ensure that using guide groove
Sample 800, not by torsion, keeps 800 stress of sample more accurate in preset force loading procedure.
Referring again to Fig. 1, the first clamping member 210b in the first clamp assemblies 210 passes through adjustment disk 230 and threaded rod 310
It links together, the end of threaded rod 310 is connected to adjustment disk 230,360 lower end of load transducer by load transducer 360
It is threadedly coupled with adjustment disk 230.Sample 800 is connect by the first clamping member 210b with adjustment disk 230.
Second clamping piece 220b is linked together by start shaft coupling piece 410 and the action shaft of voice coil motor 400.Voice coil
The start amplitude (hereinafter referred to as amplitude) of motor 400 be with start frequency dependence, make that dynamic frequency is higher, and amplitude is smaller.As long as negative
It carries power to do in dynamic range at it, amplitude would not change, and just as common electric machine, in nominal load, can control its turn
Speed is constant the same.The start of voice coil motor 400 ranging from mm ranks.400 mover of voice coil motor is with being to be not in contact between stator
, action shaft can be moved up and down arbitrarily when not powering on.After energization, action shaft can be controlled in start amplitude range
Interior any one place is kept constant, as long as power is no more than load, will not be drawn out or is pressed into.Therefore, pass through above-mentioned preset force
Under the action of load maintainer 300, the start of voice coil motor 400 is controlled, the fatigue test under different stress ratios may be implemented.
Further, in this embodiment high frequency in situ imaging fatigue tester 10 further includes surrounding sample clamping mechanism 200
Synchrotron radiation light source optical transmitting set 520 and synchrotron radiation light in 510 opposite sides of translucent cover is arranged in the translucent cover 510 of setting
Source optical receiver 530 and synchrotron radiation light source platform 540, testing machine body 100 are rotationally connected with synchrotron radiation light source platform
540.Wherein, translucent cover 510 can be cloche, in other embodiments, or transparent plastic jacket.In voice coil motor
After the completion of 400 starts, start synchrotron radiation light source optical transmitting set 520, tester base 110 is in synchrotron radiation light source platform 540
Upper rotation drives sample 800 to carry out 180 degree rotation；Meanwhile the synchrotron radiation that synchrotron radiation light source optical transmitting set 520 is sent out is high
Energy X-ray passes through translucent cover 510, then is received by synchrotron radiation light source optical receiver 530 after penetrating the sample 800 of 180 degree rotation,
It completes to be imaged the 180 degree of sample 800, repeat above operation, until reaching the cycle-index of the completion experiment of setting.It captures
High-resolution two-dimensional image data be transferred to image processing unit and carry out three-dimensionalreconstruction, complete material internal three-dimensional appearance
Reconstruct.
The high frequency in situ imaging fatigue tester 10 of the present embodiment further includes data acquisition and control device 600, voice coil electricity
Machine 400, synchrotron radiation light source optical transmitting set 520 and synchrotron radiation light source optical receiver 530 are acquired with data and control device
600 communication connections.In the present embodiment, load transducer 360 and voice coil motor 400 are connected to data by signal transmssion line and adopt
Collection is connect with control device 600.In the present embodiment, high frequency in situ imaging fatigue tester 10 further include display equipment 700 to
It can be with the three-dimensional image inside display material.Wherein, display equipment 700 can be the aobvious of computer either tablet or middle control
Show device etc..
Specific test operation process is in the present embodiment：
After sample 800 is gripped, release handle 350 is turned, drives threaded support cylinder 320 to rotate, in control interface
It can be seen that 360 collected force signal of load transducer becomes zero, can be ready for testing.It is driven by release handle 350
Threaded support cylinder 320 rotates, and makes threaded rod 310 that load transducer 360 be driven to generate axial displacement with the first clamping member 210b, into
And pressure is generated to sample 800 and screws locking after 360 collected force signal of load transducer reaches preset requirement
Screw 340, makes preset force remain unchanged.
Data are acquired controls voice coil motor 400 with the frequency start of setting, the work of voice coil motor 400 with control device 600
Moving axis drives the second clamp assemblies 220 to move back and forth up and down, and applies the displacement load of axial reciprocating to sample 800；Meanwhile load
Sensor 360 detects the load signal that sample 800 is born, and passes to data processing and control device 600；When reciprocal vertical position
After transfer lotus reaches the imaging cycle number of setting, data processing controls voice coil motor 400 with control device 600 and stops start；
Start synchrotron radiation light source, testing machine body 100 rotates, and sample 800 is driven to carry out 180 degree rotation；Meanwhile synchrotron radiation light source
The synchrotron radiation sigmatron that optical transmitting set 520 is sent out pass through translucent cover 510, then penetrate 180 degree rotation sample 800 after by
Synchrotron radiation light source optical receiver 530 receives, and completes to be imaged the 180 degree of sample 800, repeats above operation, set until reaching
The cycle-index of fixed completion experiment.The high-resolution two-dimensional image data captured is transferred to image processing unit and carries out three
Dimension reconstruct, completes the reconstruct of material internal three-dimensional appearance.
In conclusion using voice coil motor 400 as driving device, voice coil motor 400 has high-frequency, high-precision, high speed
The features such as response, high transmission stiffness, stable thrust, high reliability, long lifespan.Electric energy can be directly changed into linear motion
Mechanical energy, and then all machine drivings being omitted between motor and fixture realize direct between motor and fixture
Transmission, test frequency can reach 50Hz or more, realize high frequency start, and then carry out high-cycle fatigue, research material to sample 800
High Zhou Naizhi super high cycle fatigues inefficacy mechanism.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, above in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Described in usual attached drawing here and represent of the invention real
Applying the component of example can be arranged and designed with a variety of different configurations.
Therefore, the detailed description of above the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is instruction or implies relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Claims (10)
1. a kind of high frequency in situ imaging fatigue tester, which is characterized in that it includes：
Testing machine body；
Sample clamping mechanism；For gripping sample, the sample clamping mechanism includes the first clamp assemblies being oppositely arranged
With the second clamp assemblies；
Preset power load maintainer；The preset power load maintainer is set to first clamp assemblies of the sample clamping mechanism
Pressure is preset in side for applying to the sample；
Voice coil motor；The voice coil motor is fixedly connected on the testing machine body, and the start axis connection of the voice coil motor
In second clamp assemblies.
2. high frequency in situ imaging fatigue tester according to claim 1, which is characterized in that the testing machine body includes
Tester base and testing machine bearing, the tester base and the testing machine bearing are detachably connected with, and the testing machine
The installation cavity for accommodating the voice coil motor, the action shaft of the voice coil motor are formed between pedestal and the testing machine bearing
It is connect with second clamp assemblies across the testing machine bearing.
3. high frequency in situ imaging fatigue tester according to claim 2, which is characterized in that the voice coil motor is described
The both sides of action shaft axis direction are provided with cushion pad.
4. high frequency in situ imaging fatigue tester according to claim 1, which is characterized in that the preset power load maintainer
Including threaded rod and threaded support cylinder, the threaded support cylinder is rotationally connected with the testing machine body, and the threaded support
Jacket casing is set to the threaded rod, and the threaded support cylinder and the threaded rod screw-thread fit, one end of the threaded rod are connected to
First clamp assemblies.
5. high frequency in situ imaging fatigue tester according to claim 4, which is characterized in that the preset power load maintainer
Further include thrust bearing, the thrust bearing is sheathed on the threaded support cylinder, and the threaded support cylinder passes through the thrust axis
It holds and is rotatablely connected in the testing machine body.
6. high frequency in situ imaging fatigue tester according to claim 5, which is characterized in that outside the threaded support cylinder
Wall is provided with annular flange, and the thrust bearing includes the first thrust bearing and the second thrust bearing, first thrust bearing
The both sides of the annular flange are respectively arranged at second thrust bearing.
7. high frequency in situ imaging fatigue tester according to claim 1, which is characterized in that the first clamp assemblies packet
Two the first clamping members being oppositely arranged along the direction of the default pressure are included, second clamp assemblies include along described pre-
It is formed if two the second clamping pieces that the direction of pressure is oppositely arranged, between two the first clamping members described for clamping
First clip cavity of sample forms the second clip cavity for clamping the sample between two second clamping pieces；Described in two
A first clamping member in relatively close second clamp assemblies of the first clamping member offers the first mounting groove, described
First mounting groove extends to the centre position of the first clamping member, two second folders from the edge of the first clamping member
Second clamping piece in the relatively close the first clamping member of gripping member offers the second mounting groove, second installation
Slot extends to the centre position of second clamping piece from the edge of second clamping piece.
8. high frequency in situ imaging fatigue tester according to claim 7, which is characterized in that two the first clamping members
A first clamping member for being relatively distant from second clamp assemblies is provided with and one end of the sample matched first
Groove, second clamping piece that two second clamping pieces are relatively distant from first clamp assemblies are provided with and institute
State matched second groove of the other end of sample.
9. the high frequency in situ imaging fatigue tester according to claim 1~8 any one, which is characterized in that the height
Frequency in situ imaging fatigue tester further includes the translucent cover for surrounding sample clamping mechanism setting, is arranged in the translucent cover phase
Synchrotron radiation light source optical transmitting set and synchrotron radiation light source optical receiver to both sides and synchrotron radiation light source platform, it is described
Testing machine body is rotationally connected with the synchrotron radiation light source platform.
10. high frequency in situ imaging fatigue tester according to claim 9, which is characterized in that further include data acquisition with
Control device, the voice coil motor, the synchrotron radiation light source optical transmitting set and the synchrotron radiation light source optical receiver with
The data acquisition is communicated to connect with control device.
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| CN2018101925012 | 2018-03-08 | ||
| CN201810192501 | 2018-03-08 |
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| CN108562506A true CN108562506A (en) | 2018-09-21 |
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| CN201810304049.4A Pending CN108562506A (en) | 2018-03-08 | 2018-04-03 | High frequency in situ imaging fatigue tester |
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| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
| CN110132727A (en) * | 2019-05-29 | 2019-08-16 | 山东省分析测试中心 | Sample separating apparatus and its application in a kind of ultrasonic wave fatigue test |
| CN110161048A (en) * | 2019-06-17 | 2019-08-23 | 西南交通大学 | Super high cycle fatigue damage test system based on advanced light source in situ imaging |
| CN111122344A (en) * | 2020-01-06 | 2020-05-08 | 大连理工大学 | Structure for realizing ultrahigh-temperature heating of in-situ stretching CT imaging experiment of synchrotron radiation light source |
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| CN112113844A (en) * | 2020-09-25 | 2020-12-22 | 中国科学院高能物理研究所 | In-situ mechanical performance testing device and testing method |
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| CN109883847A (en) * | 2019-03-20 | 2019-06-14 | 西南交通大学 | Big load high-frequency original position stretching and fatigue tester based on x-ray imaging |
| CN110132727A (en) * | 2019-05-29 | 2019-08-16 | 山东省分析测试中心 | Sample separating apparatus and its application in a kind of ultrasonic wave fatigue test |
| CN110132727B (en) * | 2019-05-29 | 2024-07-19 | 山东省分析测试中心 | Sample separation device in ultrasonic fatigue test and application thereof |
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
| CN110108565B (en) * | 2019-06-05 | 2024-02-09 | 长春浩园试验机有限公司 | High-frequency composite electronic universal testing machine |
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| CN111122350A (en) * | 2020-01-03 | 2020-05-08 | 同济大学 | Triaxial apparatus for synchronously loading high-frequency cyclic load under static load |
| CN111122344A (en) * | 2020-01-06 | 2020-05-08 | 大连理工大学 | Structure for realizing ultrahigh-temperature heating of in-situ stretching CT imaging experiment of synchrotron radiation light source |
| CN112113844A (en) * | 2020-09-25 | 2020-12-22 | 中国科学院高能物理研究所 | In-situ mechanical performance testing device and testing method |
| CN112881172A (en) * | 2021-01-19 | 2021-06-01 | 西南交通大学 | Well rate of strain loading device |
| CN112858043A (en) * | 2021-02-24 | 2021-05-28 | 同济大学 | Soil-structure contact surface shear test device capable of realizing bidirectional high-frequency vibration |
| CN113514336A (en) * | 2021-07-22 | 2021-10-19 | 吉林大学 | Biaxial-loading weldment fatigue performance testing device and method |
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