CN110186816A - A kind of experimental rig for testing granular materials micro kinetics characteristic - Google Patents
A kind of experimental rig for testing granular materials micro kinetics characteristic Download PDFInfo
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- CN110186816A CN110186816A CN201910404280.5A CN201910404280A CN110186816A CN 110186816 A CN110186816 A CN 110186816A CN 201910404280 A CN201910404280 A CN 201910404280A CN 110186816 A CN110186816 A CN 110186816A
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000008187 granular material Substances 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 85
- 238000006073 displacement reaction Methods 0.000 claims abstract description 57
- 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 abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000004044 response Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 description 8
- 238000011160 research Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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- Health & Medical Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of experimental rig for testing granular materials micro kinetics characteristic, including pedestal, upper holder, vertical type servo motor, lower fixed frame, horizontal stepper motor, the first strain gauge, the second strain gauge, the first displacement sensor, second displacement sensor, the first microscope photography machine and the second microscope photography machine；Upper holder is movably installed on pedestal, have vertically to active strokes, bottom, which has, fixes the first fixed station of the first particle；Vertical type servo motor driven upper holder is vertically to activity；Lower fixed frame is oppositely arranged with upper holder, is located at below upper holder, is movably installed on pedestal, have along left and right to active strokes, top, which has, fixes the second fixed station of the second particle；Horizontal stepper motor drives lower fixed frame edge left and right to activity.Technical solution proposed by the present invention aims to solve the problem that traditional equipment shear velocity and the lower problem of accuracy.
Description
Technical field
The present invention relates to geomaterial the field of test technology more particularly to a kind of test granular materials micro kinetics
The experimental rig of characteristic.
Background technique
The research of granularity contact response is more next between geomechanics and petroleum works bound pair geological materials and the particle of composite material
More sense is paid attention to, and is improved using the ability that Discrete-parcel method (DEM) carries out numerical analysis, but at present it is generally accepted that particle exists
Thin see is influenced with the mechanical characteristic on macroscopical direction by small scale crystal grain, including the friction at crystal grain boundary, crystal grain boundary
The rigidity at place, the crushing behavior of crystal grain and morphological feature.In the shearing of Macrovision analog particle, foreign countries rub between proposing selection particle
Significantly affecting for coefficient and shape parameters of particles is wiped, and to the triaxial shear test of composite material (sand grains rubber grain mixture)
In research, discovery friction and rigidity and particle form and elastic characteristic have it is close contact, this affects particle in turn
Friction behavior, and qualitatively propose the intergranular critical shear intensity of minute yardstick contact interface.Pass through Discrete-parcel method
(DEM) analysis shows, macro-scale behavior of the friction to granular materials under dull and cyclic load, between microscopic particles
It has a major impact, this macro strength and its structure behavior influenced including granular materials.It is ground in geomechanics and petroleum works
In studying carefully and practicing, the influence of speed and rate to particle macro-scale behavior is particularly important.It has been recognized that shear velocity pair
The friction of particle contact interface has an impact, and defeated using intergranular friction as sliding speed in Discrete-parcel method (DEM) modeling
Enter, affects true contact condition between particle.
With the development of instrument of new generation, Micromechanics research and particle agglomerate interface row that laboratory contacts soil particle
To have carried out significant research.Although being based on similar concept, researcher is studied using different mechanical structure between particle
Shearing behavior, in many research, micromechanical device used can be the case where not decomposing power and displacement
Lower development shearing test, but shear velocity can only carry out in lower range.
Summary of the invention
In view of this, the embodiment provides a kind of test dresses for testing granular materials micro kinetics characteristic
It sets, it is intended to solve the problems, such as that traditional equipment shear velocity and accuracy are lower.
The embodiment of the present invention provides a kind of experimental rig for testing granular materials micro kinetics characteristic, for testing the
Contact response between one particle and the second particle, including pedestal, upper holder, vertical type servo motor, lower fixed frame, horizontal step
Into motor, the first strain gauge, the second strain gauge, the first displacement sensor, second displacement sensor, the first microscope
Video camera and the second microscope photography machine；
Fixed frame is movably installed on the pedestal, have vertically to active strokes, bottom have fix
First fixed station of first particle；The fixed frame of vertical type servo motor driven is vertically to activity；It is described
Lower fixed frame is oppositely arranged with fixed frame, is located at below fixed frame, is movably installed on the pedestal, has
Along left and right to active strokes, top has the second fixed station of fixed second particle, so that second particle position
It is abutted against below first particle and with first particle；The horizontal stepper motor drives the lower fixed frame along left
Dextrad activity；
First strain gauge is fixed on fixed frame, for obtaining between first particle and the second particle
Vertical stress parameter；Second strain gauge is fixed on the lower fixed frame, for obtaining first particle and
Two intergranular horizontal stress parameters；First displacement sensor is used to obtain the vertical displacement parameter of first particle；
The second displacement sensor is used to obtain the horizontal displacement parameter of second particle；The first microscope photography machine and
Two microscope photography machines are oppositely arranged, for recording described first with first fixed station and second fixed station
The image of particle and second particle.
Further, the vertical type servo motor is equipped with vertically to the guide rail of extension；
Fixed frame includes the fixed part of L-shaped interconnecting piece and the lower end for being fixed on the interconnecting piece, the company
The upper end of socket part is slidably mounted on the guide rail, the fixed frame of vertical type servo motor driven vertically to movement,
To push the fixed part vertically to movement, the fixed part bottom is to fix described the first of first particle to fix
Station, first strain gauge and first displacement sensor are fixed on the fixed part.
Further, the sliding rail along left and right to extension is fixed on the pedestal；
The lower fixed frame includes pedestal, guide way and transmission shaft, and the base bottom is equipped with pulley, is slidably mounted on institute
It states on pedestal, the base top is second fixed station of fixed second particle；The transmission shaft along left and right to
Extend, the propeller shaft slip is installed on the sliding rail, and the guide way other end is fixed on the transmission shaft left end, with institute
It states pedestal to be oppositely arranged, the horizontal stepper motor drives the transmission shaft along left and right to moving, to push the pedestal edge
It controls to movement.
Further, the base top is equipped with vertical displacement reference plate, and the vertical displacement reference plate prolongs in horizontal direction
It stretches, is correspondingly arranged with first displacement sensor, second fixed station is located on the vertical displacement reference plate.
Further, the pedestal is fixed with horizontal displacement reference plate towards the side of the horizontal stepper motor, described
Horizontal displacement reference plate is in be correspondingly arranged vertically to extension with the second displacement sensor.
Further, the load precision of the vertical type servo motor output is 25mN；And/or the horizontal stepper motor
In the horizontal direction cloth away from precision be 0.048 μm.
Further, the photography side of the photography direction of the second microscope photography machine and the first microscope photography machine
To perpendicular.
The technical solution that the embodiment of the present invention provides, which has the benefit that, utilizes vertical type servo motor and horizontal step
Into motor between the shearing force for applying Normal stress and horizontal direction particle, make to set using accurate sensor and microscope photography machine
It is standby to carry out shearing test in high speed range, it can be achieved that carrying out microscopic test at the higher speeds, study intergranular rub
Wiping mechanism, measuring accuracy is high, range is big, extent of information is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the experimental rig of test granular materials micro kinetics characteristic provided by the invention；
Fig. 2 is the partial schematic diagram that the experimental rig of granular materials micro kinetics characteristic is tested in Fig. 1；
Fig. 3 is enlarged diagram at A in Fig. 2；
In figure: 1- pedestal, 11- base body, 111- screw, 12- bracket, 13- sliding rail, 2- vertical type servo motor, 21- are led
Rail, 3- upper holder, 31- interconnecting piece, 32- fixed part, the horizontal stepper motor of 4-, 5- lower fixed frame, 51- pedestal, 511- pulley,
512- vertical displacement reference plate, 513- horizontal displacement reference plate, 514- particle bracket, 52- guide way, 53- transmission shaft, 61-
One strain gauge, the second strain gauge of 62-, the first displacement sensor of 71-, 72- second displacement sensor, 81- first are aobvious
Micro mirror video camera, the second microscope photography of 82- machine, the first particle of 91-, the second particle of 92-.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Referring to Figure 1 to Fig. 3, the embodiment of the present invention provides a kind of test for testing granular materials micro kinetics characteristic
Device, the contact response for testing between the first particle 91 and the second particle 92, including pedestal 1, vertical type servo motor 2, on
Fixed frame 3, horizontal stepper motor 4, lower fixed frame 5, the first strain gauge 61, the displacement of the second strain gauge 62, first pass
Sensor 71, second displacement sensor 72, the first microscope photography machine 81, the second microscope photography machine 82, filter and data note
Record device (not shown).
Pedestal 1 is for fixing entire experimental rig, and in the present embodiment, pedestal 1 includes base body 11 and vertically to prolonging
The bracket 12 stretched, bracket 12 are fixed on 11 top of base body in being vertically arranged, and base body 11 is rectangular aluminum sheet, pedestal sheet
Body 11 has provided multiple adjustment hole (not shown)s, and adjustment hole inner wall is equipped with internal screw thread, will for cooperating with screw 111
Base body 11 is adjusted to horizontality.
The vertical type servo motor 2 is fixed on 12 upper end of bracket, and the vertical type servo motor 2 is equipped with vertically to extension
Guide rail 21, in the present embodiment, vertical type servo motor 2 controls that precision is higher, and the load precision of motor output is 25mN.On described
Fixed frame 3 is movably installed on the pedestal 1, and in the present embodiment, fixed frame 3 is movably installed in 12 upper end of bracket, tool
Have vertically to active strokes, fixed frame 3 includes L-shaped interconnecting piece 31 and is fixed under the interconnecting piece 31
The fixed part 32 at end, the upper end of the interconnecting piece 31 are slidably mounted on the guide rail 21, and the vertical type servo motor 2 drives institute
Interconnecting piece 31 is stated vertically to movement, to push the fixed part 32 vertically to movement, vertical type servo motor 2 and interconnecting piece
31 can drive for gear, and 32 bottom of fixed part has the first fixed station of fixed first particle 91.
Referring to Figure 1, the horizontal stepper motor 4 is fixed on pedestal 1, and in the present embodiment, horizontal stepper motor 4 is micro-
Type stepper motor, in the horizontal direction cloth away from precision be 0.048 μm.The sliding rail along left and right to extension is fixed on the pedestal 1
13, the lower fixed frame 5 is oppositely arranged with fixed frame 3, is located at fixed 3 lower section of frame, is movably installed in described
On pedestal 1, in the present embodiment, the lower fixed frame 5 includes pedestal 51, guide way 52 and transmission shaft 53, refers to Fig. 2, described
51 bottom of pedestal be equipped with pulley 511, be slidably mounted on the pedestal 1, have along left and right to active strokes, the pedestal 51
Top is equipped with vertical displacement reference plate 512, and the vertical displacement reference plate 512 extends in horizontal direction, refers to Fig. 3, described to hang down
There is the second fixed station of fixed second particle 92, so that second particle 92 at the top of straight displacement reference plate 512
It abuts against in 91 lower section of the first particle and with first particle 91, in the present embodiment, the vertical displacement reference plate 512
Top is equipped with particle bracket 514, is used to fix the second particle 92 at the top of particle bracket 514.The pedestal 51 is towards described horizontal
The side of stepper motor 4 is fixed with horizontal displacement reference plate 513, and the horizontal displacement reference plate 513 is in vertically to extension.It is described
Transmission shaft 53 is along left and right to extension, and the transmission shaft 53 is slidably mounted on the sliding rail 13, and 52 right end of guide way is fixed
It in 53 left end of transmission shaft, is oppositely arranged with the pedestal 51, the horizontal stepper motor 4 drives the transmission shaft 53 along a left side
Dextrad is mobile, to push the pedestal 51 along left and right to moving.
Refer to Fig. 2, first strain gauge 61 is fixed on fixed frame 3, in the present embodiment, is fixed on
Determine in portion 32, for obtaining the vertical stress parameter between first particle 91 and the second particle 92；Second stress sensing
Device 62 is fixed on the lower fixed frame 5, in the present embodiment, is installed between guide way 52 and transmission shaft 53, described for obtaining
Horizontal stress parameter between first particle 91 and the second particle 92, in the present embodiment, the first strain gauge 61 and the second stress
The precision of sensor 62 is 0.01N.First displacement sensor 71 is fixed on the fixed part 32, with vertical displacement reference
Plate 512 is oppositely arranged, for obtaining the vertical displacement parameter of first particle 91；The second displacement sensor 72 is fixed on
It on pedestal 1, is oppositely arranged with horizontal displacement reference plate 513, for obtaining the horizontal displacement parameter of second particle 92, this reality
It applies in example, the first displacement sensor 71 and second displacement sensor 72 are non-contact displacement transducer, and precision is 0.01 μm.
First strain gauge 61, the second strain gauge 62, the first displacement sensor 71 and second displacement sensor 72 successively with filter
Wave device and data logger electrical connection, data logger acquisition data simultaneously store, and the sample frequency of data logger is 30Hz.When
When device remains static, the noise water of a ± 0.06N is can be detected in the first strain gauge 61 and the second strain gauge 62
Flat, a ± 1.4 × 10 can be detected in the first displacement sensor 71 and second displacement sensor 72-4The noise level of mm, the mould of acquisition
Quasi- signal is filtered by filter, and the signal denoising analysis based on small echo can eliminate the noise in data, disclose true
Particle contact response.
Fig. 2, the first microscope photography machine 81 and the second microscope photography machine 82 are referred to, with first regular worker
Position and second fixed station are oppositely arranged, for recording the image of first particle 91 and second particle 92, institute
The photography direction for stating the photography direction and the first microscope photography machine 81 of the second microscope photography machine 82 is perpendicular.
Using test granular materials micro kinetics characteristic experimental rig tested when, first according to material select to
The first particle 91 and the second particle 92 of test, can be respectively rubber grain and sand particle, particle size range 1-50mm,
First particle 91 is fixed in the first fixed station, the second particle 92 is fixed in the second fixed station, the first particle 91 with
Second particle 92 abuts against, and on vertical direction；Secondly, rotary screw 111 debugs base body 11, make base body 11
In horizontality, drive fixed part 32 vertically to mobile to vertically to promotion first using vertical type servo motor 2
Grain 91, and then make the first particle 91 vertically to the second particle 92 is squeezed, using horizontal stepper motor 4 driving transmission shaft 53 along a left side
The mobile shearing force to apply horizontal direction to the second particle 92 of dextrad, in the process, 81 He of the first microscope photography machine
Second microscope photography machine 82 can observe particle in orthogonal direction, and recorded video acquires stress parameters number by data logger
According to and displacement data, extent of the destruction, shear strength and the coefficient of friction obtained between the first particle 91 and the second particle 92 can be analyzed.
Shearing using vertical type servo motor 2 and horizontal stepper motor 4 to Normal stress and horizontal direction is applied between particle
Power causes the device to the speed model in 0.19mm/h to 950mm/h using accurate sensor, microscope photography machine and data logger
Enclose interior progress shearing test, it can be achieved that carrying out microscopic test at the higher speeds, it can be at least in the velocity interval of five orders of magnitude
The interior intergranular scraping mechanism of research, measuring accuracy is high, range is big, extent of information is high.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of experimental rig for testing granular materials micro kinetics characteristic, for testing between the first particle and the second particle
Contact response, which is characterized in that including pedestal, upper holder, vertical type servo motor, lower fixed frame, horizontal stepper motor,
One strain gauge, the second strain gauge, the first displacement sensor, second displacement sensor, the first microscope photography machine and
Second microscope photography machine；Fixed frame is movably installed on the pedestal, have vertically to active strokes, bottom
The first fixed station with fixation first particle；The fixed frame of vertical type servo motor driven is vertically to work
It is dynamic；The lower fixed frame is oppositely arranged with fixed frame, is located at below fixed frame, is movably installed in the pedestal
On, have along left and right to active strokes, top has the second fixed station of fixed second particle, so that described second
Particle is located at below first particle and abuts against with first particle；The horizontal stepper motor drives the lower fixation
Frame edge is controlled to activity；
First strain gauge is fixed on fixed frame, for obtain first particle and second it is intergranular hang down
Normal stress parameter；Second strain gauge is fixed on the lower fixed frame, for obtaining first particle and second
The horizontal stress parameter of intergranular；First displacement sensor is used to obtain the vertical displacement parameter of first particle；It is described
Second displacement sensor is used to obtain the horizontal displacement parameter of second particle；The first microscope photography machine and second is shown
Micro mirror video camera is oppositely arranged with first fixed station and second fixed station, for recording first particle
With the image of second particle.
2. the experimental rig of test granular materials micro kinetics characteristic as described in claim 1, which is characterized in that described vertical
Formula servo motor is equipped with vertically to the guide rail of extension；
Fixed frame includes the fixed part of L-shaped interconnecting piece and the lower end for being fixed on the interconnecting piece, the interconnecting piece
Upper end be slidably mounted on the guide rail, the fixed frame of vertical type servo motor driven vertically to movement, thus
Push the fixed part vertically to movement, the fixed part bottom is first regular worker of fixed first particle
Position, first strain gauge and first displacement sensor are fixed on the fixed part.
3. the experimental rig of test granular materials micro kinetics characteristic as claimed in claim 1 or 2, which is characterized in that institute
State the sliding rail being fixed on pedestal along left and right to extension；
The lower fixed frame includes pedestal, guide way and transmission shaft, and the base bottom is equipped with pulley, is slidably mounted on the base
On seat, the base top is second fixed station of fixed second particle；The transmission shaft edge is controlled to extension,
The propeller shaft slip is installed on the sliding rail, and the guide way other end is fixed on the transmission shaft left end, with the bottom
Seat is oppositely arranged, and the horizontal stepper motor drives the transmission shaft along left and right to moving, to push the pedestal along left and right
To movement.
4. the experimental rig of test granular materials micro kinetics characteristic as claimed in claim 3, which is characterized in that the bottom
Seat top is equipped with vertical displacement reference plate, and the vertical displacement reference plate extends in horizontal direction, with first displacement sensor
It is correspondingly arranged, second fixed station is located on the vertical displacement reference plate.
5. the experimental rig of test granular materials micro kinetics characteristic as claimed in claim 3, which is characterized in that the bottom
Seat surface is fixed with horizontal displacement reference plate to the side of the horizontal stepper motor, and the horizontal displacement reference plate is in vertically to prolonging
It stretches, is correspondingly arranged with the second displacement sensor.
6. the experimental rig of test granular materials micro kinetics characteristic as described in claim 1, which is characterized in that described vertical
The load precision of formula servo motor output is 25mN；And/or the horizontal stepper motor in the horizontal direction cloth away from precision be
0.048μm。
7. the experimental rig of test granular materials micro kinetics characteristic as described in claim 1, which is characterized in that described the
The photography direction of two microscope photography machines and the photography direction of the first microscope photography machine are perpendicular.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910404280.5A CN110186816B (en) | 2019-05-16 | 2019-05-16 | Test device for testing microscopic dynamics characteristics of granular materials |
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|---|---|---|---|
| CN201910404280.5A CN110186816B (en) | 2019-05-16 | 2019-05-16 | Test device for testing microscopic dynamics characteristics of granular materials |
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| CN110186816B CN110186816B (en) | 2024-02-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397197A (en) * | 2021-12-23 | 2022-04-26 | 东南大学 | Rock-soil micro-mechanical property tester |
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