CN220271004U - Light fragile porous material axial constrained compression characteristic measurement experiment device - Google Patents
Light fragile porous material axial constrained compression characteristic measurement experiment device Download PDFInfo
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- CN220271004U CN220271004U CN202320971455.2U CN202320971455U CN220271004U CN 220271004 U CN220271004 U CN 220271004U CN 202320971455 U CN202320971455 U CN 202320971455U CN 220271004 U CN220271004 U CN 220271004U
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- 239000011148 porous material Substances 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 title claims description 6
- 238000007906 compression Methods 0.000 title abstract description 13
- 230000006835 compression Effects 0.000 title abstract description 12
- 238000002474 experimental method Methods 0.000 title description 9
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an experimental device for measuring the axial constrained compression characteristic of a light fragile porous material, which comprises a pressure testing machine, wherein the pressure testing machine comprises a frame, a hydraulic system, an upper pressure plate and a bottom plate positioned below the upper pressure plate, the lower surface of the upper pressure plate is movably connected with a vertically downward pressure head, and a sleeve matched with the pressure head is arranged on the bottom plate through a free sliding platform. According to the utility model, the pressure head and the sleeve are kept in a parallel and coaxial state in the experimental process, and the interference of friction force and resistance between the pressure head and the sleeve on experimental data is avoided, so that the accurate compression mechanical characteristics of the light fragile material under the constraint condition, such as elastic modulus and yield limit, are obtained, and accurate data can be provided for indirectly calculating the Poisson's ratio.
Description
Technical Field
The utility model belongs to the technical field of material mechanics, and particularly relates to an axial constrained compression characteristic measurement experimental device for a light fragile porous material.
Background
The Poisson's ratio of the light fragile porous material is not easy to directly obtain through a simple axial compression experiment, the elastic modulus and the yield limit of the light fragile porous material under the two conditions of constraint and unconstrained are respectively obtained through experiments according to the current empirical method, and the Poisson's ratio is indirectly calculated according to a theoretical formula between the elastic modulus or the yield limit and the Poisson's ratio.
The constrained experiment of the light fragile porous material has no special experimental equipment, the experimental device is imperfect, the problem that the effective coaxiality is difficult to realize exists between the constrained sleeve and the pressure head, and no standard solution exists at present.
Constraint experiments require that the fit clearance between the constraint sleeve and the ram be very small and that effective coaxiality cannot be achieved by visual inspection and marking alone. Under the condition that the pressure head and the sleeve are parallel and not coaxial, friction can be generated between the pressure head and the wall of the sleeve, and the friction force can directly influence the stress calculation, so that an experiment result is error; under the condition that the pressure head and the sleeve are not parallel and coaxial, the pressure head can be pressed down in the experimental process to encounter great resistance, so that experimental equipment is damaged, experimental data are wrong and the like. The constrained compression experiment is mainly completed by axial compression equipment common in laboratories, and the pressure head of the equipment cannot meet the pressure head requirement of the constrained experiment, and the required pressure head needs to be fixed on the compression equipment.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the axial constrained compression characteristic measurement experimental device for the light fragile porous material, which can keep the pressure head and the sleeve in a parallel and coaxial state in the experimental process, and avoid the interference of friction force and resistance between the pressure head and the sleeve on experimental data, so that the compression mechanical characteristics of the light fragile material under the constrained condition, such as elastic modulus and yield limit, can be obtained, and accurate data can be provided for indirectly calculating poisson ratio.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a light fragile porous material axial has constraint pressurized characteristic measurement experimental apparatus, includes the pressure testing machine, and the pressure testing machine includes frame, hydraulic system, goes up the pressure disk and is located the bottom plate of pressure disk below, the lower surface of going up the pressure disk has vertical decurrent pressure head through swing joint, have arranged the sleeve with the pressure head through free sliding platform on the bottom plate.
As a preferable technical scheme of the utility model, the pressure head is movably connected to the lower surface of the upper pressure plate through the combined connecting mechanism, the combined connecting mechanism comprises a clamping block I, a clamping block II, a clamp I, a clamp II and a clamp III, two clamping heads of the clamp III are clamped at the outer sides of the clamping block I and the clamping block II to press and paste the clamping block I and the clamping block II on opposite side walls of the pressure head, and the clamping block I and the clamping block II are respectively fixed on the pressure plate through the clamp I and the clamp II.
As a preferable technical scheme of the utility model, the inner side of the clamping block I is provided with a groove, and the clamping block II is in a cuboid shape.
As a preferable technical scheme of the utility model, the groove is a V-shaped groove.
As a preferable technical scheme of the utility model, the clamping and applying direction of the clamp iii is a horizontal direction, and the clamping and applying directions of the clamp i and the clamp ii are vertical directions.
As a preferred technical solution of the present utility model, the free sliding platform comprises a cage with steel balls and a spacer fixed on top of the cage with steel balls, on which the sleeve is placed.
As a preferable technical scheme of the utility model, a ball-head hinge is connected below the bottom plate, and the orthographic projection of the pressure head is positioned in the orthographic projection range of the ball-head hinge.
As a preferable technical scheme of the utility model, the average clearance between the sleeve and the pressure head nested together is less than or equal to 0.2mm.
As a preferable technical scheme of the utility model, the cross sections of the sleeve and the pressure head are axisymmetric.
As a preferable technical scheme of the utility model, the sleeve is a cylinder, and the pressure head is a cylinder.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: through the multi-degree-of-freedom follow-up adjustment effect of the free sliding platform and the ball head hinge, the utility model can keep the pressure head and the sleeve in a parallel and coaxial state in the experimental process, and avoid the interference of friction force and resistance between the pressure head and the sleeve on experimental data, thereby obtaining the compression mechanical characteristics of the light fragile material under the constraint condition, such as elastic modulus and yield limit, and providing accurate data for indirectly calculating the Poisson ratio.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a front view of the present utility model.
FIG. 2 is a diagram showing the relationship between the press head and the clamp blocks I, II and III according to the present utility model.
In the figure: 1. the device comprises a frame 2, a hydraulic system 3, an upper pressing plate 4, a bottom plate 5, a pressing head 6, a sleeve 7, a clamping block I8, a clamping block II 9, a clamp I10, a clamp II 11, a clamp III 12, a ball head hinge 13, a retainer 14 with steel balls and a gasket.
Detailed Description
Referring to fig. 1-2, the structure of one embodiment of the utility model comprises a pressure testing machine, wherein the pressure testing machine comprises a frame 1, a hydraulic system 2, an upper pressing plate 3 and a bottom plate 4 positioned below the upper pressing plate 3, the lower surface of the upper pressing plate 3 is movably connected with a vertically downward pressing head 5, and a sleeve 6 matched with the pressing head 5 is arranged on the bottom plate 4 through a free sliding platform.
The pressure head 5 is movably connected to the lower surface of the upper pressure plate 3 through a combined connecting mechanism, the combined connecting mechanism comprises a clamping block I7, a clamping block II 8, a clamp I9, a clamp II 10 and a clamp III 11, two clamping heads of the clamp III 11 clamp the clamping block I7 and the clamping block II 8 on the outer sides of the clamping block I7 and the clamping block II 8, the clamping block I7 and the clamping block II 8 are pressed on the opposite side walls of the pressure head 5, and the clamping block I7 and the clamping block II 8 are respectively fixed on the upper pressure plate 3 through the clamp I9 and the clamp II 10.
The inner side of the clamping block I7 is provided with a groove, and the clamping block II 8 is cuboid.
The groove is a V-shaped groove. Under the clamping force of the clamp III 11, two faces of the V-shaped groove of the clamp block I7 are tightly attached to the side wall of the pressure head 5, the pressure head 5 can be calibrated to be in a vertical posture, and one face of the clamp block II 8 is tightly attached to the outer wall of the other side of the pressure head 5, so that the pressure head 5, the clamp block I7, the clamp block II 8 and the clamp III 11 are fixed together; then, the clamp blocks I7 and II 8 are respectively fixed with the upper pressing plate 3 through the clamps I9 and II 10, and finally, the fixing and the holding of the vertical posture of the pressing head 5 are realized.
The clamping force application direction of the clamp III 11 is a horizontal direction, and the clamping force application directions of the clamp I9 and the clamp II 10 are vertical directions.
The free sliding platform comprises a retainer 13 with steel balls and a gasket 14 fixed on top of the retainer 13 with steel balls, and the sleeve 6 is placed on the gasket 14. Under the action of the free sliding platform, the sleeve 6 can automatically move along with the position of the pressure head 5, so that the phenomenon of non-coaxial is avoided.
The lower part of the bottom plate 4 is connected with a ball-head hinge 12, and the orthographic projection of the pressure head 4 is positioned in the orthographic projection range of the ball-head hinge 12. Under the action of the ball head hinge 12, the sleeve 6 can automatically adjust the angle of the sleeve along with the angle of the pressure head 5, so that the phenomenon of non-parallelism is avoided.
The average clearance between the sleeve 6 and the pressure head 5 nested together is less than or equal to 0.2mm. The gap is extremely small, so that the material is prevented from being extruded into the gap in the compression process.
The cross sections of the sleeve 6 and the pressure head 5 are axisymmetric.
The sleeve 6 is a cylinder, and the pressure head 5 is a cylinder.
In other embodiments, the cross-section of the sleeve 6 and the ram 5 may be designed as a regular polygon.
The above description is presented only as a practical solution of the utility model and is not intended as a single limitation on the solution itself.
Claims (8)
1. The utility model provides a fragile porous material axial of light has constraint to be pressed characteristic measurement experimental apparatus, includes the pressure testing machine, and the pressure testing machine includes frame, hydraulic system, goes up the pressure disk and is located the bottom plate of pressure disk below, its characterized in that: the lower surface of the upper pressing disc is movably connected with a vertical downward pressing head, and a sleeve matched with the pressing head is arranged on the bottom plate through a free sliding platform;
the free sliding platform comprises a retainer with steel balls and a gasket fixed at the top of the retainer with steel balls, and the sleeve is placed on the gasket;
the ball-head hinge is connected below the bottom plate, and the orthographic projection of the pressure head is positioned in the orthographic projection range of the ball-head hinge.
2. The experimental set-up according to claim 1, wherein: the pressure head is in through combined type coupling mechanism swing joint the lower surface of last pressure disk, combined type coupling mechanism includes clamp splice I, clamp splice II, clamp clip I, clamp clip II and clamp clip III, and two chucks of clamp clip III press the clamp splice I with clamp splice II on the opposite lateral wall of pressure head in the outside of clamp splice I and clamp splice II, and clamp splice I and clamp splice II are fixed respectively clamp splice I and clamp splice II on the pressure disk.
3. The experimental set-up according to claim 2, wherein: the inner side of the clamping block I is provided with a groove, and the clamping block II is cuboid.
4. A test device according to claim 3, wherein: the groove is a V-shaped groove.
5. The experimental set-up according to claim 2, wherein: the clamping force application direction of the clamp III is a horizontal direction, and the clamping force application directions of the clamp I and the clamp II are vertical directions.
6. The experimental set-up according to claim 1, wherein: and the average clearance between the sleeve and the pressure head nested together is less than or equal to 0.2mm.
7. The experimental set-up according to claim 1, wherein: the cross sections of the sleeve and the pressure head are axisymmetric.
8. The experimental set-up of claim 7, wherein: the sleeve is a cylinder, and the pressure head is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320971455.2U CN220271004U (en) | 2023-04-26 | 2023-04-26 | Light fragile porous material axial constrained compression characteristic measurement experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320971455.2U CN220271004U (en) | 2023-04-26 | 2023-04-26 | Light fragile porous material axial constrained compression characteristic measurement experiment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220271004U true CN220271004U (en) | 2023-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320971455.2U Active CN220271004U (en) | 2023-04-26 | 2023-04-26 | Light fragile porous material axial constrained compression characteristic measurement experiment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220271004U (en) |
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2023
- 2023-04-26 CN CN202320971455.2U patent/CN220271004U/en active Active
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