CN219915168U - Device for measuring Poisson's ratio of material at high and low temperatures - Google Patents
Device for measuring Poisson's ratio of material at high and low temperatures Download PDFInfo
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- CN219915168U CN219915168U CN202320803904.2U CN202320803904U CN219915168U CN 219915168 U CN219915168 U CN 219915168U CN 202320803904 U CN202320803904 U CN 202320803904U CN 219915168 U CN219915168 U CN 219915168U
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- 239000000463 material Substances 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000005485 electric heating Methods 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims abstract description 6
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004964 aerogel Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a device for measuring Poisson's ratio of a material at high and low temperatures, which comprises: the testing machine comprises a testing machine main body, a clamping mechanism and a clamping mechanism, wherein a guide rail is arranged on the testing machine main body; the bottom of the temperature control box is provided with a pulley matched with the guide rail and used for sliding the temperature control box on the main body of the tester, and an optical distance meter used for measuring the front and rear width and thickness of the material spline is arranged in the temperature control box; the temperature control structure is arranged on the temperature control box and used for regulating and controlling the internal temperature of the temperature control box. The utility model adopts the additional installation of the temperature control box, wherein a refrigeration compressor and an electric heating wire are utilized to provide a constant and accurate high and low temperature environment for the specific poisson ratio test, and the multi-azimuth optical distance meter in the constant temperature box can accurately detect the numerical variation of the width and the thickness of the material in the test process, thereby simplifying the test process, improving the test precision and guaranteeing the accuracy of the poisson ratio test of the material.
Description
Technical Field
The utility model relates to the technical field of poisson ratio testing of materials, in particular to a device for measuring poisson ratio of materials at high and low temperatures.
Background
The material deforms in the direction of the load while simultaneously deforming in the direction perpendicular to the load by elongating (or elongating), and the negative value of the ratio of the strain ε 1 in the perpendicular direction to the strain ε in the direction of the load is referred to as the Poisson's ratio of the material.
In the existing device, sometimes, the phenomenon that the stress direction and the spline direction are not coincident and the spline slips caused by clamping the spline by a manual or extensometer can occur, and adverse effects are generated for obtaining final experimental data. Meanwhile, as the environmental temperature has a certain influence on the material performance, the existing device is difficult to detect the Poisson ratio of the material at constant high and low temperatures. Finally, after the existing poisson ratio tensile spline test is finished, a method for measuring transverse and axial strain values of the spline by manually utilizing a vernier caliper can have certain deviation, so that the accuracy of measured data is lower.
Based on the points, the utility model designs a device capable of testing the Poisson ratio of a material at high and low temperatures to solve the existing problems.
Disclosure of Invention
The utility model aims to provide a device for measuring the Poisson's ratio of a material at high and low temperatures, so as to solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an apparatus for measuring poisson's ratio of a material at high and low temperatures, comprising:
the testing machine comprises a testing machine main body, a clamping mechanism and a positioning mechanism, wherein a guide rail is arranged on the testing machine main body;
the temperature control box is internally provided with an optical distance meter for measuring the width and thickness of the material spline before and after the test;
the temperature control structure is arranged on the temperature control box and used for regulating and controlling the internal temperature of the temperature control box.
Preferably, the temperature control structure comprises an electric heating wire and a refrigeration compressor, wherein the refrigeration compressor is connected to the back of the temperature control box and is communicated with the inside of the temperature control box, the electric heating wire is arranged on one side of the inner cavity of the temperature control box, and a metal heat transfer shell is arranged outside the electric heating wire and used for mounting and protecting the electric heating wire.
Preferably, the front surface of the temperature control box is provided with a closable movable door capable of being opened and closed in a rotating way, the outer wall of the closable movable door is provided with a glass observation window for monitoring the internal test condition of the temperature control box, and the glass observation window is a double-layer vacuum glass window.
Preferably, the clamping structure comprises an upper clamp and a lower clamp, wherein a positioning jacket is arranged in the upper clamp and the lower clamp, the lower clamp is arranged on the main body of the testing machine, and a jacking device for lifting the upper clamp is arranged on the main body of the testing machine.
Preferably, the jacking device comprises a cross beam, a lifting device for jacking the cross beam is arranged on the inner side of the main body of the testing machine, a detachable rod is arranged at the bottom end of the cross beam, and the bottom end of the detachable rod is fixedly connected with the upper clamp.
Preferably, the back of the inner side of the temperature control box is provided with an air exhausting plate, and the top end and the bottom end of the temperature control box are respectively provided with holes matched with the upper clamp and the lower clamp.
The utility model has the technical effects and advantages that:
the utility model adopts the additional installation of the temperature control box, wherein a refrigeration compressor and an electric heating wire are utilized to provide a constant and accurate high and low temperature environment for the specific poisson ratio test, and the multi-azimuth optical distance meter in the constant temperature box can accurately detect the numerical variation of the width and the thickness of the material in the test process, thereby simplifying the test process, improving the test precision and guaranteeing the accuracy of the poisson ratio test of the material.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model.
FIG. 2 is a schematic diagram of the internal structure of the temperature control box according to the present utility model.
FIG. 3 is a schematic view of the structure of the clamp of the present utility model.
In the figure: 1. a testing machine main body; 2. a temperature control box; 3. a metal heat transfer housing; 4. heating wires; 5. an optical rangefinder; 6. an air exhaust plate; 7. a movable door can be closed; 8. a cross beam; 9. a detachable rod; 10. a clamp is arranged; 11. a lower clamp; 12. a glass viewing window; 13. a hole; 14. and (5) positioning a jacket.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a device for measuring Poisson ratio of materials at high and low temperatures as shown in figures 1-3, which comprises:
the testing machine comprises a testing machine body 1, wherein a clamping structure for positioning a material spline is arranged on the testing machine body 1, the clamping structure comprises an upper clamp 10 and a lower clamp 11, the upper clamp 10 and the lower clamp 11 are clamps matched with the material spline, a positioning jacket 14 is arranged in the upper clamp 10 and the lower clamp 11, the shape of the positioning jacket 14 is matched with two ends of a bone shape (fishbone shape) of the material spline to be tested, the automatic clamping of the material spline can be realized according to the size of a set physical force, the spline is ensured to be vertical and coincide with the direction of a test tensile force, the slipping phenomenon of the spline is prevented in the testing process, the adverse influence caused by manually clamping the spline is reduced, the lower clamp 11 is arranged on the testing machine body 1, a lifting device for lifting the upper clamp 10 is arranged on the testing machine body 1, the lifting device comprises a cross beam 8, the cross beam 8 is used for connection between the upper clamp 10 and the testing machine body 1, a lifting device for lifting the cross beam 8 is arranged on the inner side of the testing machine body 1, the lifting device can be an electric push rod, a cylinder and other equipment which is arranged on the inner side of the testing machine body 1, the lifting device can also can be used for lifting the upper clamp 10 and the lifting device, the upper clamp can be conveniently and the lower clamp 10 can be conveniently detached from the upper clamp 10 or the lower clamp 10 through the lifting device, and the upper clamp 9 can be conveniently detached from the upper clamp 10 through the lifting device, and the upper clamp 9 or the upper clamp 9;
the temperature control box 2 is arranged on the main body 1 of the testing machine, pulleys matched with the pulleys are arranged at the bottom of the temperature control box 2 and used for sliding the temperature control box 2 on the main body 1 of the testing machine, the inner side and the bottom of the temperature control box 2 are respectively provided with holes 13 corresponding to the upper clamp 10 and the lower clamp 11 through the matching of the upper guide rail and the pulleys, so that the poisson ratio of materials in a high-low temperature environment is realized, the inside of the temperature control box 2 is provided with an optical distance meter 5 for measuring the front width and the back thickness of a material spline, the optical distance meter 5 is respectively arranged at the left side and the back side of the inside of the temperature control box 2, the change value of the front length and the back thickness of the spline can be measured and calculated at the same time, compared with the prior art, the error and time consumption caused by the manual or extensometer for measuring the change value of the thickness are reduced, the inner side back of the temperature control box 2 is provided with an exhaust plate 6, the top end and the bottom of the temperature control box 2 are respectively provided with holes 13 corresponding to the clamping structures, after the holes 13 are combined with the upper clamp 10 and the clamp 11, the inside of the temperature control box 2 is sealed by an aerogel sealing ring, a good heat insulation effect is realized, the front face-side is provided with a window 7, the window is provided with a window 12, and the window is provided with a window 12, which is used for observing the temperature window, and is more accurately and has a window 12, and is used for observing the window, and is provided with a window 12;
the temperature control structure is arranged on the temperature control box 2 and used for regulating and controlling the internal temperature of the temperature control box, the temperature control structure comprises an electric heating wire 4 and a refrigerating compressor, the refrigerating compressor is connected to the back of the temperature control box 2 and is communicated with the inside of the temperature control box through a pipeline, the refrigerating purpose is achieved by changing the high-low pressure state of a refrigerant, compared with the traditional method of introducing liquid nitrogen for refrigerating, the efficiency of the refrigerating compressor is higher, safer, more environment-friendly and more cost-saving, the accuracy of the temperature is improved, the adverse effect of the inaccuracy of the ambient temperature on a test result is reduced, the electric heating wire 4 is arranged on one side of the inner cavity of the temperature control box 2, a metal heat transfer shell 3 is arranged on the outer part of the electric heating wire 4 and used for installing and protecting the electric heating wire 4, the electric heating wire 4 is used for heating the internal temperature of the temperature control box 2 and is matched with the refrigerating compressor to achieve the control of the accurate temperature in the temperature control box 2, the high-low temperature range of the inside the temperature control box 2 is-40 ℃ to 150 ℃, and the temperature accuracy of the temperature is +/-0.1 ℃.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (6)
1. An apparatus for measuring poisson's ratio of a material at high and low temperatures, comprising:
the testing machine comprises a testing machine main body (1), wherein a guide rail is arranged on the testing machine main body, and a clamping structure for positioning material sample strips is arranged on the testing machine main body (1);
the temperature control box (2) is provided with pulleys matched with the guide rails at the bottom and used for sliding the temperature control box (2) on the tester main body (1), and an optical distance meter (5) for measuring the width and thickness of the material sample strip before and after the test is arranged in the temperature control box (2);
the temperature control structure is arranged on the temperature control box (2) and used for regulating and controlling the internal temperature of the temperature control box.
2. The device for measuring the poisson ratio of the materials at high and low temperatures according to claim 1, wherein the temperature control structure comprises an electric heating wire (4) and a refrigeration compressor, the refrigeration compressor is connected to the back of the temperature control box (2) and is communicated with the back of the temperature control box, the electric heating wire (4) is arranged on one side of an inner cavity of the temperature control box (2), and a metal heat transfer shell (3) is arranged outside the electric heating wire (4) and used for mounting and protecting the electric heating wire (4).
3. The device for measuring the poisson ratio of the materials at high and low temperatures according to claim 1, wherein the front surface of the temperature control box (2) is provided with a closable movable door (7) which can be opened and closed in a rotating way, the outer wall of the closable movable door (7) is provided with a glass observation window (12) for monitoring the internal test condition of the temperature control box (2), and the glass observation window (12) is a double-layer vacuum glass window.
4. The device for measuring the poisson ratio of the materials at high and low temperatures according to claim 1, wherein the clamping structure comprises an upper clamp (10) and a lower clamp (11), a positioning jacket (14) is arranged in the upper clamp (10) and the lower clamp (11), the lower clamp (11) is arranged on a tester main body (1), and a jacking device for lifting the upper clamp (10) is arranged on the tester main body (1).
5. The device for measuring the poisson ratio of the materials at high and low temperatures according to claim 4, wherein the jacking device comprises a cross beam (8), a lifting device for jacking the cross beam (8) is arranged on the inner side of the tester main body (1), a detachable rod (9) is arranged at the bottom end of the cross beam (8), and the bottom end of the detachable rod (9) is fixedly connected with an upper clamp (10).
6. The device for measuring the poisson ratio of the materials at high and low temperatures according to claim 1, wherein the air exhausting plate (6) is arranged on the back side of the inner side of the temperature control box (2), and holes (13) which are matched with the upper clamp (10) and the lower clamp (11) are respectively formed in the top end and the bottom end of the temperature control box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320803904.2U CN219915168U (en) | 2023-04-12 | 2023-04-12 | Device for measuring Poisson's ratio of material at high and low temperatures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320803904.2U CN219915168U (en) | 2023-04-12 | 2023-04-12 | Device for measuring Poisson's ratio of material at high and low temperatures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219915168U true CN219915168U (en) | 2023-10-27 |
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ID=88426867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320803904.2U Active CN219915168U (en) | 2023-04-12 | 2023-04-12 | Device for measuring Poisson's ratio of material at high and low temperatures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219915168U (en) |
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2023
- 2023-04-12 CN CN202320803904.2U patent/CN219915168U/en active Active
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