CN114279862A - Stress-strain three-dimensional test platform and test method - Google Patents
Stress-strain three-dimensional test platform and test method Download PDFInfo
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- CN114279862A CN114279862A CN202111363411.3A CN202111363411A CN114279862A CN 114279862 A CN114279862 A CN 114279862A CN 202111363411 A CN202111363411 A CN 202111363411A CN 114279862 A CN114279862 A CN 114279862A
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 239000004927 clay Substances 0.000 claims abstract description 72
- 238000000386 microscopy Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 210000000078 claw Anatomy 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011148 porous material Substances 0.000 claims abstract description 15
- 230000005012 migration Effects 0.000 claims abstract description 14
- 238000013508 migration Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 25
- 238000002474 experimental method Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- 238000011160 research Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000011888 foil Substances 0.000 description 4
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- 230000006872 improvement Effects 0.000 description 1
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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 stress-strain three-dimensional test platform comprises a device base, a host and an operating platform are fixedly connected to the top surface of the device base from left to right in sequence, and a magnetic resonance microscope for observing the water distribution and migration conditions in pores when clay deforms is fixedly connected to the top of the operating platform, which is close to the left side; according to the invention, by moving the shell and the fixed claw plate, when the stress, strain and moisture field of the soft clay are required to be synchronously detected, the elastic rubber tube filled with the soft clay and water can be sent to the magnetic resonance microscopy instrument through the detection plate by the hydraulic cylinder, and the distribution and migration condition of the moisture in the pores and the stress and strain of the soft clay during deformation are synchronously completed by matching with the external elastic rubber tube, so that a soil sample deformation and pore response rule model with 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 for stress and strain, stress is defined as "additional internal force borne on a unit area", when an object is stressed to generate deformation, the deformation degrees at various points in the body are generally different, and the mechanical quantity for describing the deformation degree at one point is the strain at the point.
When people research the microscopic deformation mechanism of the soft clay, the deformation mechanism of the soft clay generally cannot be separated from the strain rate effect, the strain of the soft clay in unit time is mostly researched from a macroscopic perspective, the existing relation between the total change of the multi-reaction pores and the deformation rate cannot describe the correlation between the microscopic response (such as the distribution, migration and even the change of the behavior of water in the pores) of the pores and the deformation rate under different loading conditions, meanwhile, the existing research still has the technical limitation of implementation of instruments in stages in the detection test process of the loading process and the water distribution measurement, experimenters are required to continuously go back and forth to carry out experiments among 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 advantages of making up the technical limitation of implementation of a loading process and a water distribution measurement process by stages in the prior research and solving the problem that the prior test method cannot describe the microscopic response of pores under different loading conditions.
The invention discloses a stress strain three-dimensional test platform which comprises a device base, a host and an operating platform, wherein the host and the operating platform are arranged at the top of the device base, the top of the operating platform, which is close to the left side, is fixedly connected with a magnetic resonance microscopy instrument for observing the water distribution and migration conditions inside pores when clay deforms, the host is electrically connected with the magnetic resonance microscopy instrument through an electric wire, the top of the operating platform, which is close to the front side, is provided with a display screen for displaying detection data of the magnetic resonance microscopy instrument and an operating keyboard for controlling relevant equipment in the test platform through the host, and the top of the operating platform is provided with a supporting power mechanism capable of sliding left and right to send the clay into the magnetic resonance microscopy instrument for observation.
Support power unit and include the removal shell at the operation panel top through slider mechanism sliding connection, and slide mechanism's inside is equipped with the pneumatic cylinder that promotes the removal shell and remove, the inside of removing the shell is equipped with the control chamber, and the internally mounted in control chamber has the motor, the motor that establishes in the inside of removing the shell passes through the electric wire with the pneumatic cylinder and is connected with the host computer electricity, the left side of removing the shell is promoted by the pneumatic cylinder and is laminated with the magnetic resonance microscope when slider mechanism end, the position fixedly connected with that removes the shell surface and corresponds the magnetic resonance microscope observation entry can stretch into the inside pick-up plate of magnetic resonance microscope, the surface of pick-up plate is equipped with the clay that is used for making the clay take place to deform and snatchs the mechanism.
The clay snatchs the movable groove that the mechanism includes that the top surface of pick-up plate is seted up, 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 gripper block that deforms through hinge fixedly connected with, and two gripper blocks are the mirror image setting, and the equal threaded connection in opposite side of two gripper blocks has solid fixed ring, and the equal fixedly connected with in inner wall of two solid fixed rings is used for placing the clay so that control its elastic rubber tube that deforms, and the output of motor is equipped with and is used for driving two movable blocks and tighten up the drive structure who keeps away from each other, and drive structure installs in the inside of pick-up plate and removal shell.
The driving structure comprises control shafts which are connected with the surface of the two movable blocks in a threaded manner and used for controlling the transverse movement of the movable blocks, wherein the surfaces of the control shafts, which are close to the two movable blocks, are provided with two opposite thread grooves, the movable grooves and the detection plate are provided with movable holes matched with the control shafts, the control shafts are movably connected in the movable holes, one ends of the control shafts, which are far away from the detection plate, penetrate through the detection plate and extend to the inside of the control cavity, the control shafts are far away from one end of the detection plate and are fixedly connected with a large belt wheel, the surface of the large belt wheel is connected with a small belt wheel through transmission of a transmission belt, and the inner walls of the small belt wheel are fixedly connected with the output end of the motor.
The detecting plate, the quantity of elasticity rubber tube is two, and two detecting plates are located the inside of magnetic resonance micro-appearance and the outside of magnetic resonance micro-appearance respectively with the elasticity rubber tube, the one end that the magnetic resonance micro-appearance was kept away from to the control shaft runs through the inside of removing the shell and extends to the inside of another detecting plate, and be located the outside detecting plate of magnetic resonance micro-appearance and the right side fixed connection who removes the shell, be located the outside elasticity rubber tube inside of magnetic resonance micro-appearance and be equipped with the foil gage, and the foil gage passes through the wire and is connected with the host computer electricity.
The slider mechanism is including seting up the sliding tray at the operation panel top, and the inner wall sliding connection of sliding tray has the link block, the top fixedly connected with support column of link block, and the bottom damping rotation that damping rubber and removal shell were passed through at the top of support column is connected.
The stress-strain three-dimensional test platform comprises two detection plates and two elastic rubber tubes, wherein the two detection plates and the two elastic rubber tubes are respectively positioned inside 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 inside of the movable shell and extends to the inside of the other detection plate, the detection plates positioned outside the magnetic resonance microscope are fixedly connected with the right side of the movable shell, and strain gauges are arranged inside the elastic rubber tubes positioned outside the magnetic resonance microscope and are electrically connected with a host through leads.
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 matched with the spherical bulge.
The stress-strain three-dimensional test platform comprises a magnetic resonance microscope, a movable shell, a sealing shell, a supporting column and an operating platform, wherein the top surface of the operating platform is fixedly connected with the sealing shell, the sealing shell is covered outside the magnetic resonance microscope and the movable shell, a through groove matched with the movable shell is formed in the side surface of the sealing shell, the right side of the movable shell is movably clamped with the sealing shell, the front section of the sealing shell is L-shaped, the surface of the sealing shell is movably connected with the right side of the sealing shell, a through hole matched with the supporting column is formed in the surface of the sealing shell, and the bottom surface of the sealing shell is movably connected with the top surface of the operating platform.
According to the stress-strain three-dimensional test platform, the top surfaces of the two fixed claw plates are fixedly connected with the fixed plate, and the top surfaces of the fixed plates are in threaded connection with the connecting blocks.
According to the stress-strain three-dimensional test platform, the opposite sides of the two connecting blocks are fixedly connected with the elastic supporting rods, and the elastic supporting rods are made of TPU plastics.
According to the stress-strain three-dimensional test platform, the opposite sides of the two connecting blocks are fixedly connected with the telescopic rods, the telescopic rods are made of medical silica gel, and the two elastic rubber tubes are corrugated tubes.
A stress-strain three-dimensional test method comprises the following steps:
s1, taking a plurality of dry clays, uniformly pressing the dry clays into powder, mixing the powder with water in proportion, and uniformly dividing the powder into two parts.
And S2, kneading the mixed soft clay into a cylinder with a diameter similar to the inner diameter of the elastic rubber tube, pressing the kneaded soft clay into the two elastic rubber tubes, uniformly filling the inner parts of the elastic rubber tubes, and cutting off the soft clay exposed out of the elastic rubber tubes by using a knife.
S3, installing two elastic rubber hoses on the fixed claw plates on the two detection plates through the fixed rings, and then starting the main machine and the magnetic resonance microscope, wherein the elastic rubber hose provided with the strain gauge is positioned on the right side of the movable shell.
S4, the hydraulic cylinder is controlled to be started through the control keyboard, the hydraulic cylinder pushes the connecting slide block, the detection plate drives the elastic rubber tube and soft clay inside the elastic rubber tube to enter the magnetic resonance microscopy instrument, and the hydraulic cylinder stops running after the movable shell is contacted with the magnetic resonance microscopy instrument.
S5, an operator observes an image displayed on the display screen, the control motor rotates at a constant speed, the small belt wheel drives the large belt wheel and the control shaft to rotate through the transmission belt, the two movable blocks are close to each other, and the two fixed claw plates bend the elastic rubber pipe and the soft clay inside the elastic rubber pipe slowly.
S6, observing an image observed by the magnetic resonance microscope in the display screen, recording the distribution and migration conditions of water in clay pores when the clay deforms differently, and simultaneously recording the stress generated when the soft clay inside the elastic rubber tube outside the magnetic resonance microscope deforms, thereby completing the synchronous monitoring of the stress, the strain and the moisture field.
And S7, closing the magnetic resonance microscope, controlling the motor to move to enable the fixed claw plate and the elastic rubber tube to return to the original position, and controlling the hydraulic cylinder to enable the movable shell to drive the detection plate to move out of the magnetic resonance microscope.
And S8, closing the main machine, taking down the two elastic rubber tubes, ejecting out the internal soft clay, wiping the interior of the rubber tubes 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, by moving the shell and the fixed claw plate, when the stress, strain and moisture field of the soft clay are required to be synchronously detected, the elastic rubber tube filled with the soft clay and water can be sent to the magnetic resonance microscopy instrument through the hydraulic cylinder, the distribution and migration conditions of the moisture in the pores when the soft clay deforms and the stress and strain when the soft clay deforms are synchronously completed by matching with the external elastic rubber tube, 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 soft soil deformation rate correlation and the changes of the pore size, the distribution, the behavior, the migration and the like under a certain stress condition 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, meanwhile, an external ironware and electromagnetic waves are isolated through the isolation shell, the influence on the experimental process is avoided, and the accuracy of the experiment is ensured.
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 embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic front sectional view of the embodiment 1 of the present invention;
FIG. 2 is a schematic side view of the structure of embodiment 1 of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 1;
FIG. 5 is a schematic front sectional view of embodiment 2 of the present invention;
FIG. 6 is an enlarged view of the structure at C in FIG. 5;
FIG. 7 is a schematic front sectional view of embodiment 4 of the present invention;
fig. 8 is an enlarged schematic view of the structure at D in fig. 7.
In the figure: 1. a device base; 2. a host; 3. an operation table; 4. a magnetic resonance microscopy; 5. a display screen; 6. connecting the sliding block; 7. a support pillar; 8. a hydraulic cylinder; 9. moving the shell; 10. detecting a plate; 11. a movable block; 12. a fixed jaw plate; 13. a fixing ring; 14. an elastic rubber tube; 15. a control shaft; 16. a control chamber; 17. a large belt pulley; 18. a small belt pulley; 19. plugging the shell; 20. a fixing plate; 21. connecting blocks; 22. an elastic strut; 23. a telescopic rod; 24. an insulating shell; 25. a strain gauge.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1:
referring to fig. 1-4, a stress-strain three-dimensional testing platform includes a device base, host computer 2 and operation panel 3 that device base 1 top set up, operation panel 3 is close to left top fixedly connected with and is used for carrying out the magnetic resonance microscope 4 that observes with the migration condition in the inside moisture distribution of hole when clay deformation, host computer 2 is connected with the magnetic resonance microscope 4 electricity through the electric wire, operation panel 3 is close to positive top and is equipped with the display screen that shows the micro-instrument of magnetic resonance 4 detected data and controls the keyboard of controlling relevant equipment in the experiment platform through host computer 2, but the top surface of operation panel 3 is equipped with the support power unit that can the horizontal slip send into the micro-instrument of magnetic resonance 4 in with the clay and observe, the micro-instrument of magnetic resonance 4 of setting, can replace other equipment, more clear demonstration clay in the inside moisture distribution of hole and the migration condition.
The supporting power mechanism comprises a movable shell 9 which is connected with the top of the operating platform 3 in a sliding way through a sliding block mechanism, and a hydraulic cylinder for pushing the movable shell 9 to move is arranged in the sliding mechanism, a control cavity 16 is arranged in the movable shell 9, and the control chamber 16 is internally provided with a motor, the motor and the hydraulic cylinder 8 arranged in the movable shell 9 are electrically connected with the host through an electric wire, the left side of the movable shell 9 is attached to the magnetic resonance microscopy instrument 4 when being pushed to the end of the slider mechanism by the hydraulic cylinder 8, the position of the surface of the movable shell 9 corresponding to the observation inlet of the magnetic resonance microscopy instrument 4 is fixedly connected with a detection plate 10 which can extend into the magnetic resonance microscopy instrument 4, the surface of the detection plate 10 is provided with a clay grabbing mechanism for promoting the clay to deform, and the arranged clay grabbing mechanism can be used for controlling the deformation amount of the clay accurately by experimenters according to the content displayed in a display screen and the host 2 through controlling a keyboard.
The clay snatchs the movable groove that the mechanism includes that the top surface of pick-up plate 10 is seted up, 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 to produce the fixed claw 12 of deformation through hinge fixedly connected with, and two fixed claw 12 are the mirror image setting, the equal threaded connection in opposite side of two fixed claw 12 has solid fixed ring 13, the equal fixedly connected with in inner wall of two solid fixed ring 13 is used for placing the clay so that 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 tighten up the drive structure who keeps away from each other, and drive structure installs in the inside of pick-up plate 10 and removal 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 the opposite thread groove in two places, and the movable hole with 15 looks adaptations of control shaft is all seted up with the inside of pick-up plate 10 in movable groove, 15 swing joint in the inside in movable hole of control shaft, the one end that pick-up plate 10 was kept away from to control shaft 15 runs through the pick-up plate 10 and extends to the inside in control chamber 16, and the one end fixedly connected with big band pulley 17 of pick-up plate 10 is kept away from to control shaft 15, the surface of big band pulley 17 is connected with little band pulley 18 through drive belt, the inner wall of little band pulley 18 and the output fixed connection of motor.
The detecting plate 10 and the elastic rubber tube 14 are two in number, the two detecting plates 10 and the elastic rubber tube 14 are respectively located inside the magnetic resonance microscopy instrument 4 and outside the magnetic resonance microscopy instrument 4, one end, far away from the magnetic resonance microscopy instrument 4, of the control shaft 15 penetrates through the inside of the movable shell 9 and extends to the inside of the other detecting plate 10, the detecting plate 10 located outside the magnetic resonance microscopy instrument 4 is fixedly connected with the right side of the movable shell 9, the strain foil 25 is arranged inside the elastic rubber tube 14 located outside the magnetic resonance microscopy instrument 4, and the strain foil 25 is electrically connected with the host machine 2 through a conducting wire.
Slider mechanism is including seting up the sliding tray at operation panel 3 top, and the inner wall sliding connection of sliding tray has link block 6, link block 6's top fixedly connected with support column 7, and the top of support column 7 is passed through damping rubber and is connected with the bottom damping rotation of removing shell 9, support column 7 through establishing can cooperate two pick-up plates 10, can detect the completion back at the clay on one pick-up plate 10, rotate and remove the shell 9 and send into magnetic resonance microscopy 4 with the clay on another pick-up plate 10 and detect, improve the efficiency that detects.
Embodiment 1 is through moving shell 9 and fixed claw 12 for when needing to carry out synchronous detection to the stress, strain and the moisture field of soft clay, can let the pick-up plate 10 send into magnetic resonance microscopy instrument 4 with the elastic rubber tube 14 that fills with soft clay and water through pneumatic cylinder 8, cooperate outside elastic rubber tube 14, synchronous completion is to the distribution and the migration condition of the inside moisture of hole and the stress and the strain of soft clay when deformation of soft clay, the soil sample deformation and the hole response law model of taking load level and speed etc. as the parameter is established to the completion, with the relation between changes such as the ration relativity of the soft soil deformation rate and hole size, distribution, behaviour, migration under the quantitative certain stress condition.
Example 2:
referring to fig. 5, a spherical protrusion is disposed at one end of the control shaft 15 away from the movable housing 9, a slot matched with the spherical protrusion is disposed on an inner wall of the movable slot, a separation housing 24 is fixedly connected to a top surface of the console 3, the separation housing 24 covers the magnetic resonance microscopy 4 and the movable housing 9, a through slot matched with the movable housing 9 is disposed on a side surface of the separation housing 24, a plugging housing 19 is movably clamped on a right side of the movable housing 9, a front cross-sectional shape of the plugging housing 19 is an L-shape, a surface of the plugging housing 19 is movably connected with a right side of the separation housing 24, a through hole matched with the support column 7 is disposed on a surface of the plugging housing 19, and a bottom surface of the plugging housing 19 is movably connected with a top surface of the console 3.
Different from embodiment 1, the control shaft 15 can be more stably and smoothly rotated inside the detection plate 10 by the spherical protrusion and the isolation shell 24, and meanwhile, an external ironware and electromagnetic waves are isolated by the isolation shell 24, so that the experiment process is prevented from being influenced, and the experiment precision is ensured.
Example 3:
referring to fig. 6, the top surfaces of the two fixed jaw plates 12 are fixedly connected with a fixed plate 20, the top surface of the fixed plate 20 is in threaded connection with a connecting block 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.
Different from embodiment 2, the fixing plate 20 and the elastic strut 22 enable the elastic strut 22 to limit the moving track of the fixed jaw plate 12 when the fixed jaw plate 12 is tightened, so as to ensure the stability of the subsequent bending of the elastic rubber tube 14.
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 bellows-shaped elastic rubber tube 14 for can make fixed claw plate 12 can not let elastic rubber tube 14 buckle as required, but make elastic rubber tube 14 extruded by fixed claw plate 12, change the atress condition of soft clay, provide more variables for the experiment, improve the precision of experiment.
A stress-strain three-dimensional test method comprises the following steps:
s1, taking a plurality of dry clays, uniformly pressing the dry clays into powder, mixing the powder with water in proportion, and uniformly dividing the powder into two parts.
And S2, kneading the mixed soft clay into a cylinder with a diameter similar to the inner diameter of the elastic rubber tube 14, pressing the kneaded soft clay into the two elastic rubber tubes 14, uniformly filling the inner parts of the elastic rubber tubes 14, and cutting off the soft clay exposed out of the elastic rubber tubes 14 by using a knife.
S3, mounting two elastic rubber tubes 14 on the fixed claw plates 12 on the two detection plates 10 through the fixed rings 13, and then starting the main machine 2 and the magnetic resonance microscope 4, wherein the elastic rubber tubes 14 provided with the strain gauges 25 are positioned on the right side of the movable shell 9.
S4, controlling the hydraulic cylinder 8 to start by operating the keyboard, enabling the hydraulic cylinder 8 to push the connecting slide 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 microscopy instrument 4, and stopping the operation of the hydraulic cylinder 8 after the movable shell 9 is contacted with the magnetic resonance microscopy instrument 4.
S5, an operator observes an image displayed on the display screen 5, the motor is controlled to rotate at a constant speed, the small belt wheel 18 drives the large belt wheel 17 and the control shaft 15 to rotate through the transmission belt, the two movable blocks 11 approach each other, and meanwhile the two fixed claw plates 12 enable the elastic rubber tube 14 to be slowly bent with soft clay inside the elastic rubber tube.
S6, observing the imaging observed by the magnetic resonance microscope 4 in the display screen 5, recording the distribution and migration conditions of water in clay pores when the clay deforms differently, and simultaneously recording the stress generated when the soft clay in the elastic rubber tube 14 outside the magnetic resonance microscope 4 deforms, thereby completing the synchronous monitoring of the stress, the strain and the water field.
S7, the magnetic resonance microscope 4 is closed, the motor is controlled to move so that the fixed claw plates 12 and the elastic rubber tube 14 are restored, and the hydraulic cylinder 8 is controlled so that the movable shell 9 drives the detection plate 10 to move out of the magnetic resonance microscope 4.
And S8, closing the main machine 2, taking down the two elastic rubber tubes 14, ejecting out the soft clay inside, wiping the inside of the soft clay clean by using a towel, and ending the experiment.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
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 platform close to the left side is fixedly connected with a magnetic resonance microscopy instrument for observing the water distribution and migration conditions inside pores when the clay deforms, the host is electrically connected with the magnetic resonance microscopy instrument through an electric wire, a display screen for displaying detection data of the magnetic resonance microscopy instrument and an operation keyboard for controlling relevant equipment in the experiment platform through the host are arranged at the top of the operating platform close to the front side, and a supporting power mechanism capable of sliding left and right to convey the clay into the magnetic resonance microscopy instrument for observation is arranged at the top surface of the operating platform;
the supporting power mechanism comprises a moving shell which is connected to the top of the operating platform in a sliding mode through a slider mechanism, a hydraulic cylinder which pushes the moving shell to move is arranged inside the sliding mechanism, a control cavity is arranged inside the moving shell, a motor is arranged inside the control cavity, the motor and the hydraulic cylinder which are arranged inside the moving shell are electrically connected with the host through electric wires, the left side of the moving shell is attached to the magnetic resonance microscopy instrument when pushed to the end of the slider mechanism by the hydraulic cylinder, a detection plate which can extend into the magnetic resonance microscopy instrument is fixedly connected to the surface of the moving shell corresponding to an observation inlet of the magnetic resonance microscopy instrument, 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 includes that the top surface of pick-up plate is seted up, 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 gripper block that deforms through hinge fixedly connected with, and two gripper blocks are the mirror image setting, and the equal threaded connection in opposite side of two gripper blocks has solid fixed ring, and the equal fixedly connected with in inner wall of two solid fixed rings is used for placing the clay so that control its elastic rubber tube that deforms, and the output of motor is equipped with and is used for driving two movable blocks and tighten up the drive structure who keeps away from each other, and drive structure installs in the inside of pick-up plate and removal shell.
2. The stress-strain three-dimensional test platform of claim 1, wherein: the drive structure includes two the equal threaded connection in surface of movable block is used for controlling the control shaft of the horizontal activity of movable block, the surface that the control shaft is close to two movable blocks is equipped with the opposite thread groove in two places, and the activity hole with the control shaft looks adaptation is all seted up to the inside of activity groove and pick-up plate, control shaft swing joint is in the inside in activity hole, the one end that the pick-up plate was kept away from to the control shaft runs through the pick-up plate and extends to the inside in control chamber, just the big band pulley of one end fixedly connected with of pick-up plate is kept away from to the control shaft, the surface of big band pulley is connected with little band pulley through drive belt, the inner wall of little band pulley and the output fixed connection of motor.
3. The stress-strain three-dimensional test platform of claim 1, wherein: the slider mechanism is including seting up the sliding tray at the operation panel top, and the inner wall sliding connection of sliding tray has link block, link block's top fixedly connected with support column, and the bottom damping rotation that damping rubber and removal shell were passed through at the top of support column is connected.
4. The stress-strain three-dimensional test platform of claim 1, wherein: the detecting plate and the elastic rubber tube are two in number, the two detecting plates and the elastic rubber tube are respectively located inside the magnetic resonance micro-meter and outside the magnetic resonance micro-meter, one end, far away from the magnetic resonance micro-meter, of the control shaft penetrates through the inside of the movable shell and extends to the inside of the other detecting plate, the detecting plate located outside the magnetic resonance micro-meter is fixedly connected with the right side of the movable shell, the strain gauge is arranged inside the elastic rubber tube located outside the magnetic resonance micro-meter, and the strain gauge is electrically connected with the host through a lead.
5. The stress-strain three-dimensional test platform of claim 1, wherein: one end of the control shaft, which is far away from the movable shell, is provided with a spherical bulge, and the inner wall of the movable groove is provided with a clamping groove matched with the spherical bulge.
6. The stress-strain three-dimensional test platform of claim 1, wherein: the top surface fixedly connected with of operation panel separates the shell, separate the shell cage cover in the outside of magnetic resonance micro-meter and removal shell, and separate the shell side and offer with the logical groove that removes shell looks adaptation, the right side activity joint of removal 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 separation shell, the through-hole with support column looks adaptation is seted up on the surface of shutoff shell, the bottom surface of shutoff shell and the top surface swing joint of operation panel.
7. The stress-strain three-dimensional test platform of claim 1, wherein: two the top surface fixedly connected with fixed plate of fixed claw board, the top surface threaded connection of fixed plate has the connecting block.
8. The stress-strain three-dimensional test platform of claim 7, 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.
9. The stress-strain three-dimensional test platform of claim 8, wherein: two the opposite side fixedly connected with telescopic link of connecting block, and the telescopic link is a medical silica gel and constitutes, and two elasticity rubber tubes are the bellows.
10. A stress-strain three-dimensional test method is characterized by comprising the following steps:
s1, taking a plurality of dry clays, uniformly pressing the dry clays into powder, mixing the powder with water in proportion to form soft clay, and uniformly dividing the soft clay into two parts.
And S2, kneading the mixed soft clay into a cylinder with a diameter similar to the inner diameter of the elastic rubber tube, pressing the kneaded soft clay into the two elastic rubber tubes, uniformly filling the inner parts of the elastic rubber tubes, and cutting off the soft clay exposed out of the elastic rubber tubes by using a knife.
S3, installing two elastic rubber hoses on the fixed claw plates on the two detection plates through the fixed rings, and then starting the main machine and the magnetic resonance microscope, wherein the elastic rubber hose provided with the strain gauge is positioned on the right side of the movable shell.
S4, the hydraulic cylinder is controlled to be started through the control keyboard, the hydraulic cylinder pushes the connecting slide block, the detection plate drives the elastic rubber tube and soft clay inside the elastic rubber tube to enter the magnetic resonance microscopy instrument, and the hydraulic cylinder stops running after the movable shell is contacted with the magnetic resonance microscopy instrument.
S5, an operator observes an image displayed on the display screen, the control motor rotates at a constant speed, the small belt wheel drives the large belt wheel and the control shaft to rotate through the transmission belt, the two movable blocks are close to each other, and the two fixed claw plates enable the elastic rubber pipe to be slowly bent and deformed with soft clay inside the elastic rubber pipe.
S6, observing an image observed by the magnetic resonance microscope in the display screen, recording the distribution and migration conditions of water in clay pores when the clay deforms differently, and simultaneously recording the stress generated when the soft clay inside the elastic rubber tube outside the magnetic resonance microscope deforms, thereby completing the synchronous monitoring of the stress, the strain and the moisture field.
And S7, closing the magnetic resonance microscope, controlling the motor to move to enable the fixed claw plate and the elastic rubber tube to return to the original position, and controlling the hydraulic cylinder to enable the movable shell to drive the detection plate to move out of the magnetic resonance microscope.
And S8, closing the main machine, taking down the two elastic rubber tubes, ejecting out the internal soft clay, wiping the interior of the rubber tubes clean by using a towel, and ending the experiment.
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