CN114279862B - Stress-strain three-dimensional test platform and test method - Google Patents
Stress-strain three-dimensional test platform and test method Download PDFInfo
- Publication number
- CN114279862B CN114279862B CN202111363411.3A CN202111363411A CN114279862B CN 114279862 B CN114279862 B CN 114279862B CN 202111363411 A CN202111363411 A CN 202111363411A CN 114279862 B CN114279862 B CN 114279862B
- Authority
- CN
- China
- Prior art keywords
- magnetic resonance
- shell
- elastic rubber
- clay
- movable
- Prior art date
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title abstract description 8
- 239000004927 clay Substances 0.000 claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 210000000078 claw Anatomy 0.000 claims abstract description 31
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 238000013508 migration Methods 0.000 claims abstract description 14
- 230000005012 migration Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 27
- 238000002955 isolation Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of stress research, and particularly discloses a stress-strain three-dimensional test platform and a test method, wherein the test platform comprises a device base, a host machine and an operating platform are sequentially and fixedly connected to the top surface of the device base from left to right, and a magnetic resonance microscope for observing the water distribution and migration condition in a pore when clay deforms is fixedly connected to the top of the operating platform close to the left side; according to the invention, when the stress, the strain and the moisture field of the soft clay are required to be synchronously detected through the movable shell and the fixed claw plate, the elastic rubber tube filled with the soft clay and the water can be sent to the magnetic resonance microscope through the detection plate by the hydraulic cylinder, and the distribution and migration conditions of the moisture in the pores and the stress and the strain of the soft clay during the deformation of the soft clay are synchronously completed by matching with the external elastic rubber tube, so that a soil sample deformation and pore response rule model taking the load level, the speed and the like as parameters is constructed.
Description
Technical Field
The invention relates to the technical field of stress research, in particular to a stress-strain three-dimensional test platform and a test method.
Background
Stress strain is a general term of stress and strain, the stress is defined as "additional internal force born by unit area", when an object is stressed to deform, the deformation degree at each point in the body is generally different, and the mechanical quantity used for describing the deformation degree at one point is the strain of the point.
When people study the microscopic deformation mechanism of the soft clay, the deformation mechanism of the soft clay cannot be separated from the strain rate effect, the strain of the soft clay in unit time is mostly studied from a macroscopic angle, the correlation between the total change of the multi-reaction pores and the deformation rate at present cannot be described, the correlation between the microscopic response (such as the distribution and migration of moisture in the pores and even the change of the behavior) of the pores and the deformation rate under different loading conditions, meanwhile, the technical limitation of the implementation of the grading and separation instrument in the detection test process of the loading process and the water content measurement still exists in the existing study, the experimenter is required to continuously carry out experiments between different instruments, and certain inconvenience exists in the operation process.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a stress strain three-dimensional test platform and a test method, which have the technical limitations of the staged and separate instrument implementation of the loading process and the water distribution measuring process in the existing research, and solve the problem that the existing test method cannot describe the microscopic response of the pore under different loading conditions.
The invention relates to a stress strain three-dimensional test platform, which comprises a device base, a host and an operation table, wherein the host and the operation table are arranged at the top of the device base, the top of the operation table, which is close to the left side, is fixedly connected with a magnetic resonance microscope for observing the moisture distribution and migration condition in a pore when clay is deformed, the host is electrically connected with the magnetic resonance microscope through an electric wire, the top of the operation table, which is close to the front side, is provided with a display screen for displaying the detection data of the magnetic resonance microscope and a control keyboard for controlling related equipment in the test platform through the host, and the top surface of the operation table is provided with a supporting power mechanism capable of sliding left and right to send clay into the magnetic resonance microscope for observation.
The support power mechanism comprises a movable shell which is slidably connected to the top of the operating platform through a sliding block mechanism, a hydraulic cylinder which is used for pushing the movable shell to move is arranged in the sliding block mechanism, a control cavity is arranged in the movable shell, a motor is arranged in the control cavity, the motor is arranged in the movable shell and is electrically connected with a host through an electric wire, the left side of the movable shell is attached to the magnetic resonance microscope when being pushed to the end of the sliding block mechanism by the hydraulic cylinder, a detection plate which can extend into the magnetic resonance microscope is fixedly connected to the surface of the movable shell corresponding to the position of the observation inlet of the magnetic resonance microscope, and a clay grabbing mechanism which is used for enabling clay to deform is arranged on the surface of the detection plate.
The clay snatchs the movable groove that the mechanism was offered including the top surface of pick-up plate, and the inner wall sliding connection in this movable groove has two movable blocks, two the top surface of movable block is used for letting the clay produce the fixed claw board of deformation through hinge fixedly connected with, and two fixed claw boards are the mirror image setting, the equal screwed connection of opposite side of two fixed claw boards has solid fixed ring, the equal fixedly connected with of inner wall of two solid fixed rings is used for placing the elasticity rubber tube of clay so that control its deformation, the output of motor is equipped with and is used for driving two movable blocks and tightens up the drive structure that keeps away from each other, and drive structure installs the inside at pick-up plate and removal shell.
The driving structure comprises a control shaft which is used for controlling the movable blocks to transversely move and is in threaded connection with the surfaces of the two movable blocks, two opposite thread grooves are formed in the surfaces, close to the two movable blocks, of the control shaft, movable holes matched with the control shaft are formed in the movable blocks and the detection plate, the control shaft is movably connected to the inside of the movable holes, one end, far away from the detection plate, of the control shaft penetrates through the detection plate and extends to the inside of the control cavity, a large belt pulley is fixedly connected to one end, far away from the detection plate, of the control shaft, a small belt pulley is connected to the surface of the large belt pulley through a transmission belt, and the inner wall of the small belt pulley is fixedly connected with the output end of the motor.
The number of the detection plates and the number of the elastic rubber tubes are two, the two detection plates and the elastic rubber tubes are respectively positioned in the magnetic resonance microscope and outside the magnetic resonance microscope, one end of the control shaft, which is far away from the magnetic resonance microscope, penetrates through the interior of the movable shell and extends to the interior of the other detection plate, the detection plate positioned outside the magnetic resonance microscope is fixedly connected with the right side of the movable shell, the strain gauge is arranged in the elastic rubber tube positioned outside the magnetic resonance microscope, and the strain gauge is electrically connected with the host through a wire.
The sliding block mechanism comprises a sliding groove arranged at the top of the operating platform, the inner wall of the sliding groove is connected with a connecting sliding block in a sliding manner, the top of the connecting sliding block is fixedly connected with a supporting column, and the top of the supporting column is in damping rotation connection with the bottom of the movable shell through damping rubber.
The invention relates to a stress-strain three-dimensional test platform, wherein the number of detection plates and elastic rubber tubes is two, the two detection plates and the elastic rubber tubes are respectively positioned in the magnetic resonance microscope and outside the magnetic resonance microscope, one end of a control shaft, which is far away from the magnetic resonance microscope, penetrates through the interior of a movable shell and extends to the interior of the other detection plate, the detection plate positioned outside the magnetic resonance microscope is fixedly connected with the right side of the movable shell, a strain gauge is arranged in the elastic rubber tube positioned outside the magnetic resonance microscope, and the strain gauge is electrically connected with a host through a lead.
According to the stress strain three-dimensional test platform, one end of the control shaft, which is far away from the movable shell, is provided with the spherical bulge, and the inner wall of the movable groove is provided with the clamping groove which is matched with the spherical bulge.
The invention discloses a stress strain three-dimensional test platform, wherein the top surface of an operation table is fixedly connected with an isolation shell, the isolation shell is covered outside a magnetic resonance microscope and a movable shell, a through groove matched with the movable shell is formed in the side surface of the isolation shell, a plugging shell is movably clamped on the right side of the movable shell, the positive section of the plugging shell is L-shaped, the surface of the plugging shell is movably connected with the right side of the isolation shell, a through hole matched with a support column is formed in the surface of the plugging shell, and the bottom surface of the plugging shell is movably connected with the top surface of the operation table.
According to the stress strain three-dimensional test platform, the top surfaces of the two fixed claw plates are fixedly connected with the fixed plates, and the top surfaces of the fixed plates are connected with the connecting blocks in a threaded manner.
According to the stress strain three-dimensional test platform, the elastic supporting rods are fixedly connected to the opposite sides of the two connecting blocks, and the elastic supporting rods are made of TPU plastic.
According to the stress strain three-dimensional test platform, the telescopic rods are fixedly connected to the opposite sides of the two connecting blocks, the telescopic rods are composed of medical silica gel, and the two elastic rubber tubes are corrugated tubes.
Based on the stress-strain three-dimensional test platform, a stress-strain three-dimensional test method is provided, and comprises the following steps:
s1, taking a plurality of dry clay, uniformly pressing the dry clay into powder, mixing the powder with water according to a proportion, and uniformly dividing the mixture into two parts.
S2, kneading the mixed soft clay into a cylinder with the diameter similar to that of the inner parts of the elastic rubber pipes, pressing the kneaded soft clay into the inner parts of the two elastic rubber pipes, uniformly filling the inner parts of the elastic rubber pipes, and cutting off the soft clay exposed out of the elastic rubber pipes by using a knife.
S3, installing the two elastic rubber tubes on the fixed claw plates on the two detection plates through the fixed rings, and then starting the host machine and the magnetic resonance microscope, wherein the elastic rubber tube with the strain gauge is positioned on the right side of the movable shell.
S4, controlling the hydraulic cylinder to start through controlling the keyboard, enabling the hydraulic cylinder to push the connecting sliding block, enabling the detection plate to drive the elastic rubber tube and soft clay inside the elastic rubber tube to enter the magnetic resonance microscope, and stopping the operation of the hydraulic cylinder after the movable shell is in contact with the magnetic resonance microscope.
S5, an operator observes images displayed on the display screen, controls the motor to rotate at a constant speed, enables the small belt pulley to drive the large belt pulley and the control shaft to rotate through the transmission belt, the two movable blocks are mutually close to each other, and meanwhile the two fixed claw plates enable the elastic rubber tube and soft clay inside the elastic rubber tube to be bent slowly.
S6, observing imaging observed by a magnetic resonance microscope in the display screen, recording distribution and migration conditions of moisture in clay pores when clay is deformed differently, and simultaneously recording stress generated when soft clay in an elastic rubber tube outside the magnetic resonance microscope is deformed, so as to finish synchronous monitoring of stress, strain and moisture field.
S7, closing the magnetic resonance microscope, controlling the motor to move so that the fixed claw plate and the elastic rubber tube return to the original positions, and controlling the hydraulic cylinder so that the movable shell drives the detection plate to move out of the magnetic resonance microscope.
S8, closing the host, taking down the two elastic rubber tubes, ejecting out the soft clay in the interior, wiping the interior clean by using a towel, and ending the experiment.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, when the stress, the strain and the moisture field of the soft clay are required to be synchronously detected, the detection plate can be used for sending the elastic rubber tube filled with the soft clay and the water to the magnetic resonance microscope through the hydraulic cylinder, and the distribution and the migration conditions of the moisture in the pores and the stress and the strain of the soft clay during the deformation of the soft clay are synchronously completed by matching with the external elastic rubber tube, so that a soil sample deformation and pore response rule model taking the load level, the speed and the like as parameters is constructed, and the relationship between the correlation of the soft soil deformation rate and the change of the pore size, the distribution, the behaviour, the migration and the like under the condition of a certain stress is quantized.
2. According to the invention, the control shaft can rotate in the detection plate more stably and smoothly through the spherical bulge and the isolation shell, the external ironware and electromagnetic waves are isolated through the isolation shell, the experimental process is prevented from being influenced, the precision of the experiment is ensured, the elastic support rod is enabled to limit the movable track of the fixed claw plate when the fixed claw plate is tightened through the fixed plate and the elastic support rod, the stability of the subsequent elastic rubber tube during bending is ensured, the elastic rubber tube can not be bent through the telescopic rod and the bellows-shaped elastic rubber tube according to the requirement, the elastic rubber tube is extruded by the fixed claw plate, the stress condition of soft clay is changed, more variables are provided for the experiment, and the precision of the experiment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic view showing the front sectional structure of embodiment 1 of the present invention;
FIG. 2 is a schematic side view of embodiment 1 of the present invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1A;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1 at B;
FIG. 5 is a schematic view showing the front sectional structure of embodiment 2 of the present invention;
FIG. 6 is an enlarged schematic view of FIG. 5 at C;
FIG. 7 is a schematic view showing the front sectional structure of embodiment 4 of the present invention;
fig. 8 is an enlarged schematic view of the structure of fig. 7 at D.
In the figure: 1. a device base; 2. a host; 3. an operation table; 4. a magnetic resonance microscope; 5. a display screen; 6. the connecting slide block; 7. a support column; 8. a hydraulic cylinder; 9. a moving shell; 10. a detection plate; 11. a movable block; 12. a fixed claw plate; 13. a fixing ring; 14. an elastic rubber tube; 15. a control shaft; 16. a control chamber; 17. a large belt wheel; 18. a small belt wheel; 19. plugging the shell; 20. a fixing plate; 21. a connecting block; 22. an elastic strut; 23. a telescopic rod; 24. an isolation case; 25. strain gage.
Detailed Description
Various embodiments of the invention are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.
In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Example 1:
referring to fig. 1-4, a stress-strain three-dimensional test platform comprises a device base, a host machine 2 and an operation table 3, wherein the host machine 2 and the operation table 3 are arranged at the top of the device base 1, the top of the operation table 3 close to the left side is fixedly connected with a magnetic resonance microscope 4 for observing the moisture distribution and migration condition in a pore space when clay is deformed, the host machine 2 is electrically connected with the magnetic resonance microscope 4 through an electric wire, the top of the operation table 3 close to the front is provided with a display screen for displaying the detection data of the magnetic resonance microscope 4 and a control keyboard for controlling related equipment in the test platform through the host machine 2, the top surface of the operation table 3 is provided with a supporting power mechanism capable of sliding left and right to send clay into the magnetic resonance microscope 4 for observation, and the arranged magnetic resonance microscope 4 can replace other equipment to display the moisture distribution and migration condition in the pore space in clay more clearly.
The support power mechanism comprises a movable shell 9 which is slidably connected to the top of the operating platform 3 through a sliding block mechanism, a hydraulic cylinder which is used for pushing the movable shell 9 to move is arranged in the sliding block mechanism, a control cavity 16 is arranged in the movable shell 9, a motor is arranged in the control cavity 16, the motor arranged in the movable shell 9 is electrically connected with a main machine through an electric wire and the hydraulic cylinder 8, the left side of the movable shell 9 is attached to the magnetic resonance microscope 4 when being pushed to the end of the sliding block mechanism by the hydraulic cylinder 8, the surface of the movable shell 9 is fixedly connected with a detection plate 10 which can extend into the magnetic resonance microscope 4 and corresponds to the position of an observation inlet of the magnetic resonance microscope 4, the surface of the detection plate 10 is provided with a clay grabbing mechanism which is used for enabling clay to deform, and the set clay grabbing mechanism can be accurately controlled by an experimenter according to the content displayed in a display screen through controlling a keyboard and the main machine 2.
The clay snatchs the movable groove that the mechanism includes the top surface of pick-up plate 10 offered, and the inner wall sliding connection in this movable groove has two movable blocks 11, the top surface of two movable blocks 11 is used for letting the clay produce the fixed claw board 12 of deformation through hinge fixedly connected with, and two fixed claw boards 12 are mirror image setting, the equal threaded connection of opposite side of two fixed claw boards 12 has solid fixed ring 13, the equal fixedly connected with of inner wall of two solid fixed ring 13 is used for placing the clay in order to control its elastic rubber tube 14 of deformation, the output of motor is equipped with and is used for driving two movable blocks 11 and tightens up the drive structure that keeps away from each other, and drive structure installs in the inside of pick-up plate 10 and movable shell 9.
The drive structure includes the control shaft 15 that is used for controlling the horizontal activity of movable block 11 of the equal threaded connection in surface of two movable blocks 11, the surface that control shaft 15 is close to two movable blocks 11 is equipped with two opposite screw thread grooves, and the movable hole with control shaft 15 looks adaptation is all seted up to the inside of movable block and pick-up plate 10, control shaft 15 swing joint is in the inside of movable hole, the one end that the pick-up plate 10 was kept away from to control shaft 15 runs through pick-up plate 10 and extends to the inside of control chamber 16, and the one end fixedly connected with big band pulley 17 that the pick-up plate 10 was kept away from to control shaft 15, the surface of big band pulley 17 is connected with little band pulley 18 through the drive belt transmission, the inner wall and the output fixed connection of motor of little band pulley 18.
The number of the detection plates 10 and the number of the elastic rubber tubes 14 are two, the two detection plates 10 and the elastic rubber tubes 14 are respectively positioned in the magnetic resonance microscope 4 and outside the magnetic resonance microscope 4, one end of the control shaft 15, which is far away from the magnetic resonance microscope 4, penetrates through the interior of the movable shell 9 and extends to the interior of the other detection plate 10, the detection plate 10 positioned outside the magnetic resonance microscope 4 is fixedly connected with the right side of the movable shell 9, the strain gauge 25 is arranged in the elastic rubber tube 14 positioned outside the magnetic resonance microscope 4, and the strain gauge 25 is electrically connected with the host machine 2 through a wire.
The sliding block mechanism comprises a sliding groove formed in the top of the operating platform 3, the inner wall of the sliding groove is slidably connected with a connecting sliding block 6, the top of the connecting sliding block 6 is fixedly connected with a supporting column 7, the top of the supporting column 7 is rotatably connected with the bottom of the movable shell 9 through damping rubber, the two detection plates 10 can be matched with the supporting column 7, after clay on one detection plate 10 is detected, the movable shell 9 is rotated to convey clay on the other detection plate 10 into the magnetic resonance microscope 4 for detection, and the detection efficiency is improved.
In embodiment 1, when the stress, strain and moisture field of the soft clay need to be synchronously detected by the movable shell 9 and the fixed claw plate 12, the elastic rubber tube 14 filled with the soft clay and water can be sent to the magnetic resonance microscope 4 by the detection plate 10 through the hydraulic cylinder 8, and the distribution and migration of the moisture in the pores and the stress and strain of the soft clay during deformation are synchronously completed by matching with the elastic rubber tube 14 outside, so that a soil sample deformation and pore response rule model with the load level, the speed and the like as parameters is constructed, and the relationship between the correlation of the soft soil deformation rate and the change of the pore size, distribution, state, migration and the like under a certain stress condition is quantified.
Example 2:
referring to fig. 5, a spherical protrusion is disposed at one end of the control shaft 15 away from the movable shell 9, a slot adapted to the spherical protrusion is formed in an inner wall of the movable slot, a separation shell 24 is fixedly connected to a top surface of the console 3, the separation shell 24 is covered outside the magnetic resonance microscope 4 and the movable shell 9, a through slot adapted to the movable shell 9 is formed in a side surface of the separation shell 24, a blocking shell 19 is movably clamped to a right side of the movable shell 9, an L-shaped positive section of the blocking shell 19 is formed, a surface of the blocking shell 19 is movably connected to a right side of the separation shell 24, a through hole adapted to the support column 7 is formed in a surface of the blocking shell 19, and a bottom surface of the blocking shell 19 is movably connected to a top surface of the console 3.
Unlike embodiment 1, the spherical protrusion and the isolation shell 24 are provided, so that the control shaft 15 can rotate inside the detection plate 10 more stably and smoothly, and the external ironware is isolated from electromagnetic waves through the isolation shell 24, thereby avoiding influencing the experimental process and ensuring the experimental accuracy.
Example 3:
referring to fig. 6, the top surfaces of the two fixed claw plates 12 are fixedly connected with a fixed plate 20, the top surfaces of the fixed plate 20 are in threaded connection with connecting blocks 21, the opposite sides of the two connecting blocks 21 are fixedly connected with elastic supporting rods 22, and the elastic supporting rods 22 are made of TPU plastics.
Unlike embodiment 2, the fixing plate 20 and the elastic supporting rod 22 enable the elastic supporting rod 22 to limit the moving track of the fixed claw plate 12 when the fixed claw plate 12 is tightened, so that the stability of the following elastic rubber tube 14 when being bent is ensured.
Example 4:
referring to fig. 7-8, the opposite sides of the two connecting blocks 21 are fixedly connected with telescopic rods 23, the telescopic rods 23 are made of medical silica gel, and the two elastic rubber tubes 14 are corrugated tubes.
Different from embodiment 3, through telescopic link 23 and bellow-shaped elastic rubber tube 14 for can make fixed claw board 12 can not let elastic rubber tube 14 buckle as required, but make elastic rubber tube 14 by fixed claw board 12 extrusion, change the atress condition of soft clay, provide more variables for the experiment, improve the precision of experiment.
Based on the stress-strain three-dimensional test platform, a stress-strain three-dimensional test method is provided, and comprises the following steps:
s1, taking a plurality of dry clay, uniformly pressing the dry clay into powder, mixing the powder with water according to a proportion, and uniformly dividing the mixture into two parts.
S2, kneading the mixed soft clay into a cylinder with the diameter similar to that of the inner parts of the elastic rubber tubes 14, pressing the kneaded soft clay into the inner parts of the two elastic rubber tubes 14, uniformly filling the inner parts of the elastic rubber tubes 14, and cutting the soft clay exposed out of the elastic rubber tubes 14 by a knife.
S3, two elastic rubber tubes 14 are arranged on the fixed claw plates 12 on the two detection plates 10 through the fixed rings 13, and then the host machine 2 and the magnetic resonance microscope 4 are started, wherein the elastic rubber tubes 14 with the strain gauges 25 are arranged on the right side of the movable shell 9.
S4, controlling the hydraulic cylinder 8 to start through controlling the keyboard, enabling the hydraulic cylinder 8 to push the connecting sliding block 6, enabling the detection plate 10 to drive the elastic rubber tube 14 and soft clay inside the elastic rubber tube to enter the magnetic resonance microscope 4, and stopping the operation of the hydraulic cylinder 8 after the movable shell 9 is contacted with the magnetic resonance microscope 4.
S5, an operator observes the image displayed on the display screen 5, controls the motor to rotate at a constant speed, enables the small belt pulley 18 to drive the large belt pulley 17 and the control shaft 15 to rotate through the transmission belt, the two movable blocks 11 are mutually close together, and meanwhile the two fixed claw plates 12 enable the elastic rubber tube 14 and soft clay inside the elastic rubber tube to be bent slowly.
S6, observing the imaging of the inside of the display screen 5 observed by the magnetic resonance microscope 4, recording the distribution and migration conditions of moisture in clay pores when different deformations of clay occur, and simultaneously recording the stress generated when the soft clay in the elastic rubber tube 14 positioned outside the magnetic resonance microscope 4 deforms, so as to complete synchronous monitoring of the stress, the strain and the moisture field.
S7, closing the magnetic resonance microscope 4, controlling the motor to move so that the fixed claw plate 12 and the elastic rubber tube 14 return to the original positions, controlling the hydraulic cylinder 8, and enabling the movable shell 9 to drive the detection plate 10 to move out of the magnetic resonance microscope 4.
S8, closing the host machine 2, taking down the two elastic rubber tubes 14, ejecting out the soft clay inside, wiping the soft clay inside clean by using a towel, and ending the experiment.
The foregoing description is only illustrative of the invention and is not to be construed as limiting the invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present invention, should be included in the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a stress strain three-dimensional test platform, includes host computer and the operation panel that device base, device base top set up, its characterized in that: the top of the operating table, which is close to the left side, is fixedly connected with a magnetic resonance microscope for observing the moisture distribution and migration condition in the pores during clay deformation, the host is electrically connected with the magnetic resonance microscope through an electric wire, a display screen for displaying detection data of the magnetic resonance microscope and a control keyboard for controlling related equipment in an experiment platform through the host are arranged at the top of the operating table, and a supporting power mechanism capable of sliding left and right to send clay into the magnetic resonance microscope for observation is arranged at the top of the operating table;
the support power mechanism comprises a movable shell which is slidably connected to the top of the operation table through a sliding block mechanism, a hydraulic cylinder which pushes the movable shell to move is arranged in the sliding block mechanism, a control cavity is arranged in the movable shell, a motor is arranged in the control cavity, the motor arranged in the movable shell is electrically connected with the hydraulic cylinder through an electric wire, the left side of the movable shell is attached to the magnetic resonance microscope when being pushed to the end of the sliding block mechanism by the hydraulic cylinder, a detection plate which can extend into the magnetic resonance microscope is fixedly connected to the surface of the movable shell at a position corresponding to an observation inlet of the magnetic resonance microscope, and a clay grabbing mechanism which is used for pushing clay to deform is arranged on the surface of the detection plate;
the clay grabbing mechanism comprises a movable groove formed in the top surface of the detection plate, two movable blocks are slidably connected to the inner wall of the movable groove, fixed claw plates used for enabling clay to deform are fixedly connected to the top surfaces of the movable blocks through hinges, the two fixed claw plates are arranged in a mirror image mode, fixed rings are connected to opposite sides of the two fixed claw plates in a threaded mode, elastic rubber pipes used for placing the clay so as to control deformation of the clay are fixedly connected to the inner walls of the two fixed rings, driving structures used for driving the two movable blocks to tighten and separate from each other are arranged at the output end of the motor, and the driving structures are arranged inside the detection plate and the movable shell;
the driving structure comprises two control shafts which are in threaded connection with the surfaces of the movable blocks and used for controlling the movable blocks to transversely move, two opposite threaded grooves are formed in the surfaces, close to the two movable blocks, of the control shafts, movable holes matched with the control shafts are formed in the movable blocks and the detecting plate, the control shafts are movably connected to the inside of the movable holes, one ends, far away from the detecting plate, of the control shafts penetrate through the detecting plate and extend to the inside of the control cavity, the control shafts are far away from the detecting plate, one ends of the control shafts are fixedly connected with large belt pulleys, the surfaces of the large belt pulleys are connected with small belt pulleys through transmission of transmission belts, and the inner walls of the small belt pulleys are fixedly connected with the output ends of motors.
2. The stress-strain three-dimensional test platform according to claim 1, wherein: the sliding block mechanism comprises a sliding groove formed in the top of the operating platform, the inner wall of the sliding groove is connected with a connecting sliding block in a sliding mode, the top of the connecting sliding block is fixedly connected with a supporting column, and the top of the supporting column is connected with the bottom of the movable shell in a damping rotation mode through damping rubber.
3. The stress-strain three-dimensional test platform according to claim 1, wherein: the number of the detection plates and the number of the elastic rubber tubes are two, the two detection plates and the elastic rubber tubes are respectively positioned in the magnetic resonance microscope and outside the magnetic resonance microscope, one end of the control shaft, which is far away from the magnetic resonance microscope, penetrates through the interior of the movable shell and extends to the interior of the other detection plate, the detection plate positioned outside the magnetic resonance microscope is fixedly connected with the right side of the movable shell, the strain gauge is arranged in the elastic rubber tube positioned outside the magnetic resonance microscope, and the strain gauge is electrically connected with the host through a wire.
4. The stress-strain three-dimensional test platform according to claim 1, wherein: the control shaft is provided with a spherical bulge at one end far away from the movable shell, and a clamping groove matched with the spherical bulge is formed in the inner wall of the movable groove.
5. The stress-strain three-dimensional test platform according to claim 1, wherein: the top surface fixedly connected with isolation shell of operation panel, isolation shell cage is in the outside of magnetic resonance microscope and removal shell, and isolation shell side offered with remove the logical groove of shell looks adaptation, the right side activity joint that removes the shell has the shutoff shell, and the positive cross-section shape of shutoff shell is L shape, the surface of shutoff shell and the right side swing joint of isolation shell, the through-hole with support column looks adaptation has been seted up on the surface of shutoff shell, the bottom surface of shutoff shell and the top surface swing joint of operation panel.
6. The stress-strain three-dimensional test platform according to claim 1, wherein: the top surfaces of the two fixed claw plates are fixedly connected with fixed plates, and the top surfaces of the fixed plates are connected with connecting blocks in a threaded manner.
7. The stress-strain three-dimensional test platform of claim 6, wherein: the opposite sides of the two connecting blocks are fixedly connected with elastic supporting rods, and the elastic supporting rods are made of TPU plastics.
8. The stress-strain three-dimensional test platform of claim 7, wherein: the opposite sides of the two connecting blocks are fixedly connected with telescopic rods, the telescopic rods are formed by medical silica gel, and the two elastic rubber tubes are corrugated tubes.
9. A testing method based on a stress-strain three-dimensional testing platform according to any one of claims 1-8, characterized by comprising the steps of:
s1, taking a plurality of dry clay, uniformly pressing the dry clay into powder, mixing the powder with water according to a proportion to form soft clay, and uniformly dividing the soft clay into two parts;
s2, kneading the mixed soft clay into a cylinder with the diameter similar to that of the inner parts of the elastic rubber pipes, pressing the kneaded soft clay into the inner parts of the two elastic rubber pipes, uniformly filling the inner parts of the elastic rubber pipes, and cutting off the soft clay exposed out of the elastic rubber pipes by using a knife;
s3, installing two elastic rubber tubes on fixed claw plates on the two detection plates through a fixed ring, and then starting a host machine and a magnetic resonance microscope, wherein the elastic rubber tubes with strain gauges are positioned on the right side of the movable shell;
s4, controlling the hydraulic cylinder to start through controlling the keyboard, enabling the hydraulic cylinder to push the connecting sliding block, enabling the detection plate to drive the elastic rubber tube and soft clay in the elastic rubber tube to enter the magnetic resonance microscope, and stopping the operation of the hydraulic cylinder after the movable shell is contacted with the magnetic resonance microscope;
s5, an operator observes images displayed on a display screen, controls the motor to rotate at a constant speed, enables the small belt pulley to drive the large belt pulley and the control shaft to rotate through the transmission belt, enables the two movable blocks to be mutually close to each other, and simultaneously enables the elastic rubber tube and soft clay in the elastic rubber tube to be bent and deformed slowly through the two fixed claw plates;
s6, observing imaging observed by a magnetic resonance microscope in the display screen, recording distribution and migration conditions of moisture in clay pores when clay is deformed differently, and simultaneously recording stress generated when soft clay in an elastic rubber tube positioned outside the magnetic resonance microscope is deformed, so as to complete synchronous monitoring of stress, strain and moisture fields;
s7, closing the magnetic resonance microscope, controlling the motor to move so that the fixed claw plate and the elastic rubber tube return to the original positions, and controlling the hydraulic cylinder so that the movable shell drives the detection plate to move out of the magnetic resonance microscope;
s8, closing the host, taking down the two elastic rubber tubes, ejecting out the soft clay in the interior, wiping the interior clean by using a towel, and ending the experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111363411.3A CN114279862B (en) | 2021-11-17 | 2021-11-17 | Stress-strain three-dimensional test platform and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111363411.3A CN114279862B (en) | 2021-11-17 | 2021-11-17 | Stress-strain three-dimensional test platform and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114279862A CN114279862A (en) | 2022-04-05 |
| CN114279862B true CN114279862B (en) | 2023-12-26 |
Family
ID=80869327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111363411.3A Active CN114279862B (en) | 2021-11-17 | 2021-11-17 | Stress-strain three-dimensional test platform and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114279862B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002264118A (en) * | 2001-03-09 | 2002-09-18 | Isamu Kawakami | Equipment and method for removing change in shape of clay |
| KR20070103617A (en) * | 2006-04-19 | 2007-10-24 | 재단법인서울대학교산학협력재단 | Soil testing apparatus for various stress path tests under plane strain condition |
| KR100901083B1 (en) * | 2007-11-29 | 2009-06-03 | 한국수자원공사 | A pre-consolidation testing apparatus equipped with shear wave generators and receivers for measuring shear wave velocity distribution of soils |
| CN104749073A (en) * | 2015-04-02 | 2015-07-01 | 东南大学 | Device and method for testing mechanical strength of particles |
| CN106442135A (en) * | 2016-10-11 | 2017-02-22 | 深圳大学 | Soft clay soil body in-situ testing device and testing method |
| CN106546485A (en) * | 2016-11-08 | 2017-03-29 | 重庆大学 | A kind of alternating layers rock mass layer manages the multiple dimensioned assay method of micro structure non-compatible deformation |
| CN109283029A (en) * | 2018-11-26 | 2019-01-29 | 西南石油大学 | A kind of method, apparatus and clay preparing instrument measuring clay bound water and mechanics parameter |
| WO2019093966A1 (en) * | 2017-11-07 | 2019-05-16 | Nanyang Technological University | Soil displacement measurement device |
| CN109883585A (en) * | 2019-02-20 | 2019-06-14 | 莆田学院 | A kind of remote pressure measurement experiment device and its system based on virtual emulation platform |
| CN110057703A (en) * | 2019-05-13 | 2019-07-26 | 陈忠信 | A kind of forestry soil hardness detection device |
| CN210862622U (en) * | 2019-12-31 | 2020-06-26 | 桂林电子科技大学 | Model test soil body internal strain measuring device |
| CN213563430U (en) * | 2020-09-25 | 2021-06-29 | 深圳市伟业陶瓷有限公司 | Pugging machine is used in production of carborundum ceramic |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200109533A1 (en) * | 2018-10-09 | 2020-04-09 | North Carolina State University | Portable mini dynamic penetration and torque (mdpt) device |
-
2021
- 2021-11-17 CN CN202111363411.3A patent/CN114279862B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002264118A (en) * | 2001-03-09 | 2002-09-18 | Isamu Kawakami | Equipment and method for removing change in shape of clay |
| KR20070103617A (en) * | 2006-04-19 | 2007-10-24 | 재단법인서울대학교산학협력재단 | Soil testing apparatus for various stress path tests under plane strain condition |
| KR100901083B1 (en) * | 2007-11-29 | 2009-06-03 | 한국수자원공사 | A pre-consolidation testing apparatus equipped with shear wave generators and receivers for measuring shear wave velocity distribution of soils |
| CN104749073A (en) * | 2015-04-02 | 2015-07-01 | 东南大学 | Device and method for testing mechanical strength of particles |
| CN106442135A (en) * | 2016-10-11 | 2017-02-22 | 深圳大学 | Soft clay soil body in-situ testing device and testing method |
| CN106546485A (en) * | 2016-11-08 | 2017-03-29 | 重庆大学 | A kind of alternating layers rock mass layer manages the multiple dimensioned assay method of micro structure non-compatible deformation |
| WO2019093966A1 (en) * | 2017-11-07 | 2019-05-16 | Nanyang Technological University | Soil displacement measurement device |
| CN109283029A (en) * | 2018-11-26 | 2019-01-29 | 西南石油大学 | A kind of method, apparatus and clay preparing instrument measuring clay bound water and mechanics parameter |
| CN109883585A (en) * | 2019-02-20 | 2019-06-14 | 莆田学院 | A kind of remote pressure measurement experiment device and its system based on virtual emulation platform |
| CN110057703A (en) * | 2019-05-13 | 2019-07-26 | 陈忠信 | A kind of forestry soil hardness detection device |
| CN210862622U (en) * | 2019-12-31 | 2020-06-26 | 桂林电子科技大学 | Model test soil body internal strain measuring device |
| CN213563430U (en) * | 2020-09-25 | 2021-06-29 | 深圳市伟业陶瓷有限公司 | Pugging machine is used in production of carborundum ceramic |
Non-Patent Citations (1)
| Title |
|---|
| 新型真三轴仪调试及重塑黄土强度变形特性的试验研究;罗爱忠;《中国优秀硕士学位论文全文数据库》(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114279862A (en) | 2022-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8132447B2 (en) | Universal testing machine | |
| US5269190A (en) | Apparatus for the performance of rheological measurements on materials | |
| EP0041375B1 (en) | Moving die rheometer and die for use therein | |
| CN108333046B (en) | Device for measuring mechanical property of membrane material and method for measuring by adopting device | |
| US20220365038A1 (en) | Battery in-situ test system | |
| Charalambides et al. | Biaxial deformation of dough using the bubble inflation technique. I. Experimental | |
| CN106771097A (en) | Concrete shrinkage and drying shrinkage pressure tester and test method | |
| CN114279862B (en) | Stress-strain three-dimensional test platform and test method | |
| KR100406154B1 (en) | Apparatus for indentation test, method for measuring data of indentation test and mechanical properties using it, and record medium saving method for measuring mechanical properties | |
| CN108387193A (en) | A kind of measurement accurately has the sonigauge of defencive function | |
| CN110618038A (en) | Testing device and testing method for concrete stress deformation in extreme temperature environment | |
| CN201251533Y (en) | Block compression testing machine | |
| KR20180093585A (en) | Extension-compression fatigue tester of rubber | |
| CN111141614A (en) | Automatic tensile testing machine and method | |
| CN218212343U (en) | Rock lever type single-shaft creep test device | |
| WO2020224001A1 (en) | Visual flexible-material bending performance measuring device | |
| US8511172B2 (en) | Sheet metal stretch-bend-draw simulator apparatus and method | |
| CN210923390U (en) | Detection equipment for detecting thixotropic performance | |
| US6925889B2 (en) | Devices and methods for applying known resistance loads and measuring internal angles of gyration in gyratory compactors | |
| CN207964457U (en) | A kind of fixing device for measuring loess body tensile stress under effect of vibration | |
| CN113640133A (en) | Sealing film mechanical property testing device based on expansion method | |
| CN113933160A (en) | Biaxial tension test machine | |
| CN220323039U (en) | Mortar setting time tester | |
| CN220271024U (en) | Electronic universal material testing machine | |
| CN220104825U (en) | Demolding force testing device for vulcanized rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |