CN107976362A - three-point bending fixture - Google Patents
three-point bending fixture Download PDFInfo
- Publication number
- CN107976362A CN107976362A CN201711384833.2A CN201711384833A CN107976362A CN 107976362 A CN107976362 A CN 107976362A CN 201711384833 A CN201711384833 A CN 201711384833A CN 107976362 A CN107976362 A CN 107976362A
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- China
- Prior art keywords
- base
- centering
- seaming chuck
- bearing
- point bending
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- 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
- G01N2203/0023—Bending
-
- 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
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0405—Features allowing alignment between specimen and chucks
Abstract
The present invention provides a kind of three-point bending fixture, including：Base, is equipped with fixed groove on the base, is equipped with base pair and marks on the base；Bearing, the bearing are arranged on the base, and inspection body is equipped with the bearing；Centering plate, the lower part of the centering plate are arranged in the fixed groove, are equipped with alignment and are stitched on plate in described pair；Seaming chuck, the seaming chuck are arranged on the top of the bearing, and the seaming chuck is bonded with the inner surface on the centering plate top, and base seaming chuck is equipped with the seaming chuck and is marked.Compared with prior art, beneficial effects of the present invention are as follows：Simple with device, operation rapid and convenient, the advantages that accuracy of alignment is high, suitable for various sizes of three point bending specimen, have good practical application value.
Description
Technical field
The present invention relates to Experimental Mechanics field, is that one kind can realize that different size test specimens are quick accurate right specifically
In three-point bending fixture designing scheme, particularly a kind of three-point bending fixture.
Background technology
Three-point bend test is that one kind implements relatively easy, conveniently, and widely used mechanical measuring and calculation method, can be used for
Test includes the bending strength of the components such as the bar, tubing, weld seam of the solid materials such as metal, macromolecule, ceramics, semiconductor, puts down
A variety of mechanical performance indexs such as face strain fracture toughness.When three-point bend test is embodied, an important influence factor
It is system to neutrality.Main front and rear/left and right the centering included between seaming chuck and lower supporting mechanism among these, and test specimen with it is whole
Front and rear/left and right centering between sleeve clamp.The quality of system alignment is tested, directly determines the precision of three-point bend test data
With the property allowable of test result, the influence to whole test process is most important.
Found by patent retrieval and analysis net patent searching, at present only two and the relevant China of three-point bending fixture
Patent.One is the Chinese utility model patent of Publication No. CN200920300175.9, publication date is on June 2nd, 2010, specially
Sharp is entitled：Bending fixture for prefabricating fatigue crack.The patent is by being set on reinforcing head relative to two
Symmetrically arranged first point of application of the plane of symmetry of a support roller and second point of application, use so as to reach and effectively extend fixture pressure head
In the service life, shorten the set-up time, ensures the purpose of fatigue precracking effect.The second is Publication No. CN201120475743.6
Chinese utility model patent, publication date are August in 2012 1 day, patent it is entitled：One kind is used for precrack and fracture
The three-point bending fixture of toughness test.The patent is by setting the adjustable support of a pair of of spacing to slide on supporting mechanism base
Block is suitable for the test job of various sizes of test specimen.Further, since the critical component in the fixture is using dismountable
Mounting means so that it is replaced and maintenance becomes succinct, conveniently.Designed fixture in two above patent, all only exists
Trickle change has been done on traditional three-point bending fixture, the major issue of really puzzlement experimenter can not be solved --- how
Quickly and accurately realize the centering problem between fixture itself and test specimen and fixture.
The content of the invention
For in the prior art the defects of, it is an object of the invention to propose it is a kind of quickly and accurately realize fixture from
The three-point bending fixture of centering between body and test specimen and fixture.
In order to solve the above technical problems, the present invention provides a kind of three-point bending fixture, including：Base, on the base
Equipped with fixed groove, it is equipped with base pair and marks on the base；Bearing, the bearing are arranged on the base, in institute
State bearing and be equipped with inspection body；Centering plate, the lower part of the centering plate are arranged in the fixed groove, the plate in described pair
It is equipped with alignment and stitches；Seaming chuck, the seaming chuck are arranged on the top of the bearing, the seaming chuck with the centering plate
The inner surface fitting in portion, is equipped with base seaming chuck mark on the seaming chuck.
Preferably, the quantity of the bearing is two, and two bearings are disposed on the both sides of the fixed groove.
Preferably, the inspection body includes：Limiting slot, the limiting slot are arranged on the top of two bearings；It is right
Middle ruler, the centering ruler are arranged in the limiting slot.
Preferably, active grab locker is equipped with the base.
Preferably, base grip shank is equipped with the base.
Preferably, seaming chuck grip shank is equipped with the seaming chuck.
Compared with prior art, beneficial effects of the present invention are as follows：
1. the present invention fixture by fixture front set open central channel to middle plate, can rapidly and accurately realize
Front and rear/left and right centering between left and right centering, test specimen and fixture between pressure head and lower supporting mechanism；
2. the fixture of the present invention in two bearings of lower supporting mechanism and test specimen bottom by opening center shallow slot, and wherein
Arrange the mode of centering ruler, can rapidly and accurately realize the front and rear centering of test specimen and fixture；
3. the centering plate on the fixture in the present invention is dismountable mounting structure, can be fast after alignment function is realized
Quick-detach falls, and is directly entered the test phase of test specimen, while the efficiency and precision in effectively improving test specimen pair, and can be big
Big reduction test specimen centering takes the accounting in the whole testing time.
4. the fixture design in the present invention is simple, easy to operate, practicality is very high, there is huge promotional value.
Brief description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, further feature mesh of the invention
And advantage will become more apparent upon.
Fig. 1 is three-point bending fixture front view of the present invention；
Fig. 2 is three-point bending fixture side view of the present invention.
In figure：
1- centering plate 2- centering ruler 3- active grab lockers
4- fixed groove 5- seaming chucks centering mark 6- samples centering mark
The centering of 7- bases marks 8- seaming chuck 9- bases
10- bearing 11- test specimen 12- seaming chuck grip shanks
15- limiting slots are stitched in 13- base grip shanks 14- alignment
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following embodiments will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present invention
Protection domain.
Embodiment one
As shown in Fig. 1~Fig. 2,7050-T6 aviations are carried out with high-strength using a kind of three-point bending fixture provided by the invention
Flat surface of aluminum alloy strain fracture toughness KICValue three-point bend test includes the following steps：
(a) base 9 is clamped under the hydraulic pressure of electo hydraulic servocontrolled fatigue testing machine on collet.
(b) the multi-direction centering plate 1 of fixture is put into the fixed groove 4 of 9 front center position of base of lower supporting mechanism,
And clamp active grab locker 3.
(c) seaming chuck 8 is bonded with the inner surface of centering plate 1, to realize left and right/anteroposterior direction of seaming chuck 8 and base 9
Centering, then locks fatigue experimental machine upper grip, to complete the clamping of seaming chuck 8.
(d) carried out in the opening sharp end of test specimen 11 outer surface to middle mark, COD rule are stuck in 11 opening of test specimen, and will
Test specimen 11 is placed on the bearing 10 of lower supporting mechanism, makes seaming chuck centering mark 5, sample centering mark 6 and base to acceptance of the bid
Note 7 is shown from the alignment of the multi-direction centering plate 1 of fixture in seam 14 at the same time, that is, shows base 7, sample 11 and pressure head 8
Centering has been completed in the lateral direction.
(e) by the front and rear centering on centering limiting groove 4 before and after 11 lower surface of sample and 10 top of bearing of lower supporting mechanism
Limiting slot 15 is substantially aligned, and centering ruler 2 before and after being then inserted into test specimen 11 from the left and right sides respectively, pushes and pulls repeatedly in the lateral direction
Centering ruler 2, it is ensured that the centering ruler 2 of both sides moving left and right in limiting slot 15 is smooth, smooth, then shows between sample and fixture
Anteroposterior direction centering has been completed.Pay attention to checking at the same time in the process and adjust the left and right centering situation of test specimen 11.Sample 11
After being adjusted in left and right and in the front-back direction pair, centering ruler 2 before and after test specimen 11 is extracted out, unclamp locker 3, remove centering plate
1, preparation starts to test.
(f) fatigue crack prefabrication program is called, according to ASTME399《Metal material linear elasticity plane strain fracture toughness mark
Quasi- test method》Requirement, fatigue crack is carried out under conditions of the frequency 10Hz, peak force 4.19kN, amplitude power 1.89kN
It is prefabricated.
(g) K is calledICTest program, according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard testing
Method》Requirement, force value speedup be 0.2kN/s under conditions of break test specimen.
(h) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement,
It is a to measure 1/4 thickness crack length under low power light microscope respectively2=13.95mm, 1/2 thickness crack length are a3=
14.1mm, 3/4 thickness crack length are a4=13.9mm, it is a=13.98mm that average crack length, which is calculated, and judges to be somebody's turn to do
Prefabricating fatigue crack is effective.
(i) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement, paint
Force-displacement curve processed, determines PQIt is worth for 11.3kN, PmaxIt is worth for 11.9kN, and judges the PQValue is effective.
(j) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement calculate
KQIt is worth for 32.8MPam1/2, and determine that it is effective KICValue.
Embodiment two
As shown in Fig. 1~Fig. 2, measured using a kind of three-point bending fixture provided by the invention by three-point bend test
The plane strain fracture toughness K of 7075-T651 aviation high strength alumin ium alloysICValue.
7075-T651 aviations high strength alumin ium alloy plane strain fracture toughness KICBeing worth three-point bend test includes following step
Suddenly：
(a) base 9 is clamped under the hydraulic pressure of electo hydraulic servocontrolled fatigue testing machine on collet.
(b) the multi-direction centering plate 1 of fixture is put into the fixed groove 4 of 9 front center position of base of lower supporting mechanism,
And clamp active grab locker 3.
(c) seaming chuck 8 is bonded with the inner surface of centering plate 1, to realize left and right/anteroposterior direction of seaming chuck 8 and base 9
Centering, then locks fatigue experimental machine upper grip, to complete the clamping of seaming chuck 8.
(d) carried out in the opening sharp end of test specimen 11 outer surface to middle mark, COD rule are stuck in 11 opening of test specimen, and will
Test specimen 11 is placed on the bearing 10 of lower supporting mechanism, makes seaming chuck centering mark 5, sample centering mark 6 and base to acceptance of the bid
Note 7 is shown from the alignment of the multi-direction centering plate 1 of fixture in seam 14 at the same time, that is, shows base 7, sample 11 and pressure head 8
Centering has been completed in the lateral direction.
(e) by the front and rear centering on centering limiting groove 4 before and after 11 lower surface of sample and 10 top of bearing of lower supporting mechanism
Limiting slot 15 is substantially aligned, and centering ruler 2 before and after being then inserted into test specimen 11 from the left and right sides respectively, pushes and pulls repeatedly in the lateral direction
Centering ruler 2, it is ensured that the centering ruler 2 of both sides moving left and right in limiting slot 15 is smooth, smooth, then shows between sample and fixture
Anteroposterior direction centering has been completed.Pay attention to checking at the same time in the process and adjust the left and right centering situation of test specimen 11.Sample 11
After being adjusted in left and right and in the front-back direction pair, centering ruler 2 before and after test specimen 11 is extracted out, unclamp locker 3, remove centering plate
1, preparation starts to test.
(f) fatigue crack prefabrication program is called, according to ASTME399《Metal material linear elasticity plane strain fracture toughness mark
Quasi- test method》Requirement, fatigue crack is carried out under conditions of the frequency 10Hz, peak force 4.27kN, amplitude power 1.92kN
It is prefabricated.
(g) K is calledICTest program, according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard testing
Method》Requirement, force value speedup be 0.2kN/s under conditions of break test specimen
(h) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement,
It is a to measure 1/4 thickness crack length under low power light microscope respectively2=13.79mm, 1/2 thickness crack length are a3=
14.0mm, 3/4 thickness crack length are a4=13.85mm, it is a=13.88mm that average crack length, which is calculated, and judges to be somebody's turn to do
Prefabricating fatigue crack is effective.
(i) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement, paint
Force-displacement curve processed, determines PQIt is worth for 10.5kN, PmaxIt is worth for 11.01kN, and judges the PQValue is effective.
(j) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement calculate
KQIt is worth for 30.2MPam1/2, and determine that it is effective KICValue.
Embodiment three
As shown in Fig. 1~Fig. 2, measured using a kind of three-point bending fixture provided by the invention by three-point bend test
The plane strain fracture toughness K of 2024-T4 aviations highly anti-fatigue aluminium alloyICValue.
2024-T4 aviations highly anti-fatigue flat surface of aluminum alloy strain fracture toughness KICBeing worth three-point bend test includes following step
Suddenly：
(a) base 9 is clamped under the hydraulic pressure of electo hydraulic servocontrolled fatigue testing machine on collet.
(b) the multi-direction centering plate 1 of fixture is put into the fixed groove 4 of 9 front center position of base of lower supporting mechanism,
And clamp active grab locker 3.
(c) seaming chuck 8 is bonded with the inner surface of centering plate 1, to realize left and right/anteroposterior direction of seaming chuck 8 and base 9
Centering, then locks fatigue experimental machine upper grip, to complete the clamping of seaming chuck 8.
(d) carried out in the opening sharp end of test specimen 11 outer surface to middle mark, COD rule are stuck in 11 opening of test specimen, and will
Test specimen 11 is placed on the bearing 10 of lower supporting mechanism, makes seaming chuck centering mark 5, sample centering mark 6 and base to acceptance of the bid
Note 7 is shown from the alignment of the multi-direction centering plate 1 of fixture in seam 14 at the same time, that is, shows base 7, sample 11 and pressure head 8
Centering has been completed in the lateral direction.
(e) by the front and rear centering on centering limiting groove 4 before and after 11 lower surface of sample and 10 top of bearing of lower supporting mechanism
Limiting slot 15 is substantially aligned, and centering ruler 2 before and after being then inserted into test specimen 11 from the left and right sides respectively, pushes and pulls repeatedly in the lateral direction
Centering ruler 2, it is ensured that the centering ruler 2 of both sides moving left and right in limiting slot 15 is smooth, smooth, then shows between sample and fixture
Anteroposterior direction centering has been completed.Pay attention to checking at the same time in the process and adjust the left and right centering situation of test specimen 11.Sample 11
After being adjusted in left and right and in the front-back direction pair, centering ruler 2 before and after test specimen 11 is extracted out, unclamp locker 3, remove centering plate
1, preparation starts to test.
(f) fatigue crack prefabrication program is called, according to ASTME399《Metal material linear elasticity plane strain fracture toughness mark
Quasi- test method》Requirement, fatigue crack is carried out under conditions of the frequency 10Hz, peak force 4.21kN, amplitude power 1.89kN
It is prefabricated.
(g) K is calledICTest program, according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard testing
Method》Requirement, force value speedup be 0.2kN/s under conditions of break test specimen
(h) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement,
It is a to measure 1/4 thickness crack length under low power light microscope respectively2=14.1mm, 1/2 thickness crack length are a3=
14.25mm, 3/4 thickness crack length are a4=14.15mm, it is a=14.17mm that average crack length, which is calculated, and is judged
The prefabricating fatigue crack is effective.
(i) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement, paint
Force-displacement curve processed, determines PQIt is worth for 12.3kN, PmaxIt is worth for 13.0kN, and judges the PQValue is effective.
(j) according to ASTME399《Metal material linear elasticity plane strain fracture toughness standard method of test》Requirement calculate
KQIt is worth for 36.3MPam1/2, and determine that it is effective KICValue.
In conclusion the three-point bending fixture dismounting of the rapid and accurate centering of the present invention is simple, easily operated, efficient,
Plane strain fracture toughness K can be achievedICBe worth the left and right of test specimen and fixture and fixture difference inter-module during three-point bend test/
Anteroposterior direction rapid and accurate centering.The present invention opens the centering plate of central channel by design, realizes seaming chuck and lower supporting mechanism
Front and rear/left and right rapid and accurate centering, and the left and right rapid and accurate centering between test specimen and fixture.By in test specimen and lower support
Centering limiting slot is opened up respectively at the top of mechanism support, and designs centering ruler to realize quick essence in the front-back direction between test specimen and fixture
True centering.Movably lower supporting mechanism bearing is devised, suitable for various sizes of three point bending specimen.Plane strain fracture
Toughness KICIt is worth three-point bend test, the arc-shaped pattern of precrack high degree of symmetry shows that the fixture designed by the present invention can essence
Ensure demonstrate,prove test specimen to neutrality.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the case where there is no conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (6)
- A kind of 1. three-point bending fixture, it is characterised in that including：Base, is equipped with fixed groove on the base, is equipped with base pair and marks on the base；Bearing, the bearing are arranged on the base, and inspection body is equipped with the bearing；Centering plate, the lower part of the centering plate are arranged in the fixed groove, are equipped with alignment and are stitched on plate in described pair；Seaming chuck, the seaming chuck are arranged on the top of the bearing, the seaming chuck and the inner surface on the centering plate top Fitting, is equipped with base seaming chuck mark on the seaming chuck.
- 2. three-point bending fixture according to claim 1, it is characterised in that the quantity of the bearing is two, two institutes State the both sides that bearing is disposed on the fixed groove.
- 3. three-point bending fixture according to claim 2, it is characterised in that the inspection body includes：Limiting slot, the limiting slot are arranged on the top of two bearings；Centering ruler, the centering ruler are arranged in the limiting slot.
- 4. three-point bending fixture according to claim 1, it is characterised in that be equipped with active grab on the base and lock Device.
- 5. three-point bending fixture according to claim 1, it is characterised in that base grip shank is equipped with the base.
- 6. three-point bending fixture according to claim 1, it is characterised in that be equipped with seaming chuck on the seaming chuck and clamp Handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384833.2A CN107976362B (en) | 2017-12-20 | 2017-12-20 | Three-point bending fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384833.2A CN107976362B (en) | 2017-12-20 | 2017-12-20 | Three-point bending fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107976362A true CN107976362A (en) | 2018-05-01 |
| CN107976362B CN107976362B (en) | 2020-02-21 |
Family
ID=62006986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711384833.2A Active CN107976362B (en) | 2017-12-20 | 2017-12-20 | Three-point bending fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107976362B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844831A (en) * | 2018-07-01 | 2018-11-20 | 北京工业大学 | Truss core structural bending experimental rig |
| CN109142087A (en) * | 2018-07-02 | 2019-01-04 | 上海交通大学 | Texture evolution home position observation experimental provision, system and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202362206U (en) * | 2011-11-25 | 2012-08-01 | 苏州热工研究院有限公司 | Three-point bending jig for precrack and fracture toughness test |
| CN103760037A (en) * | 2014-01-23 | 2014-04-30 | 湖南大学 | Bearing-type damage biomechanic three-point bending test device and bearing-type damage biomechanic three-point bending method |
| CN105300810A (en) * | 2015-11-27 | 2016-02-03 | 武汉钢铁(集团)公司 | Three-point bending test device with laser centering device |
| CN105547858A (en) * | 2016-01-07 | 2016-05-04 | 江苏科技大学 | Measuring device and testing method for glass micro channel bending mechanical property |
| CN106769433A (en) * | 2017-03-31 | 2017-05-31 | 沈阳盛远检测技术有限公司 | Composite bends and interlayer shear sample fast fixture |
-
2017
- 2017-12-20 CN CN201711384833.2A patent/CN107976362B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202362206U (en) * | 2011-11-25 | 2012-08-01 | 苏州热工研究院有限公司 | Three-point bending jig for precrack and fracture toughness test |
| CN103760037A (en) * | 2014-01-23 | 2014-04-30 | 湖南大学 | Bearing-type damage biomechanic three-point bending test device and bearing-type damage biomechanic three-point bending method |
| CN105300810A (en) * | 2015-11-27 | 2016-02-03 | 武汉钢铁(集团)公司 | Three-point bending test device with laser centering device |
| CN105547858A (en) * | 2016-01-07 | 2016-05-04 | 江苏科技大学 | Measuring device and testing method for glass micro channel bending mechanical property |
| CN106769433A (en) * | 2017-03-31 | 2017-05-31 | 沈阳盛远检测技术有限公司 | Composite bends and interlayer shear sample fast fixture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844831A (en) * | 2018-07-01 | 2018-11-20 | 北京工业大学 | Truss core structural bending experimental rig |
| CN109142087A (en) * | 2018-07-02 | 2019-01-04 | 上海交通大学 | Texture evolution home position observation experimental provision, system and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107976362B (en) | 2020-02-21 |
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