CN113607560A - Horizontal external pressure experimental device - Google Patents
Horizontal external pressure experimental device Download PDFInfo
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- CN113607560A CN113607560A CN202110851424.9A CN202110851424A CN113607560A CN 113607560 A CN113607560 A CN 113607560A CN 202110851424 A CN202110851424 A CN 202110851424A CN 113607560 A CN113607560 A CN 113607560A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 abstract description 22
- 238000013461 design Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001687 destabilization Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a horizontal external pressure experimental device, which relates to the technical field of pressure-bearing equipment tests and comprises a cylinder body, a saddle, a water filling port, a water discharging port, a loading port, a flange, a flat cover, an experimental sample, a pressure gauge port and an emptying port, wherein the cylinder body is fixed on the saddle, the water filling port, the water discharging port and the loading port are sequentially arranged below the cylinder body, the pressure gauge port and the emptying port are arranged above the cylinder body, one end of the cylinder body is provided with a hole, the flange is welded on the outer side of the hole, the flat cover is arranged on the flange, a clamp mechanism for fixing the experimental sample is arranged in the cylinder body, the experimental sample is clamped in the cylinder body through the clamp mechanism, the clamp mechanism is fixed on the flat cover, the flat cover is connected with the flange through a stud bolt, the horizontal external pressure experimental device has the characteristics of being reusable and being suitable for external pressure experiments of various pressure vessels, and the experimental sample is connected with the experimental device through a corresponding clamp, has the characteristics of reasonable structural design, high safety and high experimental efficiency.
Description
Technical Field
The invention relates to the technical field of pressure-bearing equipment tests, in particular to a horizontal external pressure experimental device.
Background
In the design of pressure vessels, for vessels subjected to external pressure, stability is the main design problem, and critical destabilization pressure is the main basis for judging the destabilization. However, the critical buckling pressure determined by the design formula is too conservative, resulting in waste of materials in engineering applications. Therefore, in the research on the external pressure container, the external pressure critical instability pressure is often required to be obtained through experiments so as to better analyze the bearing capacity of the container and guide the design of the pressure container. The influence of axial load on the critical instability pressure of a sample is not fully considered by the existing external pressure experiment platform, so that the experiment result is influenced when the experiment is carried out on the container which only bears uniformly distributed circumferential external pressure; the fixing modes of thin shells with different sizes and types are not fully considered in the existing external pressure experiment platform.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a horizontal external pressure experiment device, which can realize different types of thin shell external pressure experiments by changing the type of a supporting plate, and has the characteristics of simple operation and improved experiment efficiency.
The invention provides a horizontal external pressure experimental device which comprises a barrel, a saddle, a water injection port, a water discharge port, a loading port, a flange, a flat cover, an experimental sample, a pressure gauge port and a vent port, wherein the barrel is fixed on the saddle, the water injection port, the water discharge port and the loading port are sequentially arranged below the barrel, the pressure gauge port and the vent port are arranged above the barrel, one end of the barrel is provided with a hole, the flange is welded on the outer side of the hole, the flat cover is arranged on the flange, the horizontal external pressure experimental device is characterized in that a clamp mechanism for fixing the experimental sample is arranged in the barrel, the experimental sample is clamped in the barrel through the clamp mechanism, the clamp mechanism is fixed on the flat cover, and the flat cover is connected with the flange through a double-headed bolt.
Further, the clamp mechanism is a first clamp and a second clamp for clamping the cylindrical shell or a third clamp for clamping the end socket type sample.
Further, first anchor clamps include a set of first layer board, a set of first sample beaded finish and a set of first screw rod, both ends are equipped with first layer board respectively in the barrel, and wherein the first layer board that is close to flat lid one end passes through the bolt fastening with the flat lid, are equipped with first screw rod between two first layer boards, the first recess of a plurality of has been seted up on the first layer board, be equipped with the sealing washer in the first recess, the experiment sample welds on first sample beaded finish, first sample beaded finish sets up in the first recess of the first layer board in both ends, offsets rather than the sealing washer that corresponds.
Furthermore, first screw rod holes are respectively formed in the upper portion and the lower portion of the first supporting plate, and the first screw rod penetrates through the first screw rod holes to be matched with a nut to fix the first supporting plate on the flat cover.
Further, the second fixture comprises a group of second support plates, a group of second sample reinforcing rings and a group of second screw rods, wherein the second support plates are arranged at two ends in the barrel respectively, the second support plates are of a step-shaped structure, the height of an experimental sample is convenient to adjust through the step-shaped structure, the second support plates close to one end of the flat cover are fixed with the flat cover through bolts, the second screw rods are arranged between the two second support plates, a plurality of second grooves are formed in the second support plates, sealing rings are arranged in the second grooves, the experimental sample is welded on the second sample reinforcing rings, and the second sample reinforcing rings are arranged in the second grooves of the second support plates at two ends and abut against the corresponding sealing rings.
Furthermore, the third fixture comprises a third supporting plate and a third screw rod, the third supporting plate is arranged at one end, close to the flat cover, in the cylinder, the third screw rod is arranged on the upper portion and the lower portion of the third supporting plate respectively, the third supporting plate is connected with the flat cover through bolts, and the experiment sample is welded on the third supporting plate.
Furthermore, the device comprises a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of the experimental sample and is electrically connected with the computer.
Furthermore, an observation port for conveniently observing the change of the sample is formed in the flat cover.
Furthermore, the device comprises a camera, wherein the camera is arranged at the observation port and is electrically connected with the computer.
Further, including the manhole, the other end welding of barrel has the head, the manhole has been seted up on the head, be equipped with the flange cover on the manhole.
Compared with the prior art, the invention has the beneficial effects that:
1) by adopting the technical scheme, the influence of uniformly distributed external pressure on the critical instability pressure of the sample can be researched, the horizontal external pressure experimental device has the characteristics of repeated use and suitability for external pressure experiments of various pressure vessels, and the experimental sample is connected with the experimental device through the corresponding clamp;
2) in the clamp mechanism arranged in the device, different types of experimental samples can be clamped by changing the type of the supporting plate, so that different types of thin shell external pressure experiments are realized;
3) the device adopts liquid for pressurization, so that the safety of the experiment is ensured;
4) the device has reasonable structural design and high safety, and greatly improves the experimental efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of the overall structure of the present invention;
FIG. 3 is a schematic structural view of a first clamp of the present invention;
FIG. 4 is a schematic structural view of a second clamp of the present invention;
fig. 5 is a schematic structural view of a third clamp according to the present invention.
In the figure: 1-a cylinder body; 1001-viewport; 2-a manhole; 3-a clamping mechanism; 4-a saddle; 5-water injection port; 6-water outlet; 7-a loading port; 8-a flange; 9-stud bolts; 10-flat cover; 11-test sample; 12-a bolt; 13-pressure gauge port; 14-a vent; 15-a first pallet; 1501-a first groove; 16-a first specimen reinforcement ring; 17-a first screw; 18-a second pallet; 1801-a second recess; 19-a second coupon reinforcement ring; 20-a second screw; 21-a third pallet; 23-a third screw; 24-end enclosure; 25-flange cover.
Detailed Description
The invention will be further described with reference to the accompanying drawings, to which, however, the scope of the invention is not limited.
As shown in figures 1-5, a horizontal external pressure experimental device comprises a cylinder 1, a saddle 4, a water injection port 5, a water discharge port 6, a loading port 7, a flange 8, a flat cover 10, an experimental sample 11, a pressure gauge port 13 and a vent port 14, wherein the water injection port 5, the water discharge port 6 and the loading port 7 are sequentially arranged below the cylinder 1 and are respectively used for water injection, water discharge and pressurization in the experimental process, the pressure gauge port 13 and the vent port 14 are arranged above the cylinder 1, gas is discharged through the vent port 14 in the experimental process, and the pressure gauge port 13 is connected with the pressure gauge and can record pressure change.
According to the horizontal external pressure experimental device, one end of a cylinder body 1 is provided with a hole, a flange 8 is welded on the outer side of the hole, a flat cover 10 is arranged on the flange 8, an observation port 1001 for conveniently observing sample change is formed in the flat cover 10, an end socket 24 is welded at the other end of the cylinder body 1, a manhole 2 is formed in the end socket 24, the manhole 2 is welded on the cylinder body 1 and plays a role of overhauling an experimental platform, a flange cover 25 is arranged on the manhole 2, and the flange cover 25 is movably connected with the manhole 2 and is convenient to open and close.
The horizontal external pressure experimental device is characterized in that a clamp mechanism 3 for fixing an experimental sample 11 is arranged in a cylinder 1, the experimental sample 11 is clamped in the cylinder 1 through the clamp mechanism 3, the clamp mechanism 3 is fixed on a flat cover 10, and the flat cover 10 is connected with a flange 8 through a stud bolt 9.
The clamp mechanism 3 is a first clamp for clamping the cylindrical shell, a second clamp for flexibly adjusting the height of the experimental sample or a third clamp for clamping the end socket type sample.
First anchor clamps include a set of first layer board 15, a set of first sample beaded finish 16 and a set of first screw rod 17, both ends are equipped with first layer board 15 respectively in the barrel 1, wherein the first layer board 15 that is close to flat lid 10 one end is fixed through bolt 12 with flat lid 10, be equipped with first screw rod 17 between two first layer boards 15, a plurality of first recess 1501 has been seted up on the first layer board 15, be equipped with the sealing washer in the first recess 1501, experiment sample 11 welds on first sample beaded finish 16, can avoid the direct and first layer board 15 contact of sample through welding experiment sample 11 on first sample beaded finish 16, and stretch into in first layer board 15, guarantee that all positions of sample length direction all receive the external pressure, unnecessary experimental error has been reduced, first sample beaded finish 16 sets up in the first recess 1501 of the first layer board 15 in both ends, the sealing washer that corresponds with it offsets.
Further, first screw holes are respectively formed in the upper portion and the lower portion of the first supporting plate 15, and the first screw 17 penetrates through the first screw holes to be matched with a nut to be fixed on the flat cover together with the first supporting plate 15.
The second fixture comprises a group of second supporting plates 18, a group of second sample reinforcing rings 19 and a group of second screws 20, wherein the second supporting plates 18 are respectively arranged at two ends in the cylinder 1, the second supporting plates 18 are of a step-shaped structure, the step-shaped structure is convenient for adjusting the height of the experimental sample 11, the second supporting plates 18 close to one end of the flat cover 10 are fixed with the flat cover 10 through bolts 12, the second screws 20 are arranged between the two second supporting plates 18, a plurality of second grooves 1801 are formed in the second supporting plates 18, sealing rings are arranged in the second grooves 1801, the experimental sample 11 is welded on the second sample reinforcing rings 19, so that the sample can be prevented from directly contacting the second supporting plates 18 and extending into the second supporting plates 18, external pressure is guaranteed to be applied to all positions in the length direction of the sample, unnecessary experimental errors are reduced, the second sample reinforcing rings 19 are arranged in the second grooves 1801 of the second supporting plates 18 at two ends, and is abutted against the corresponding sealing ring.
Further, the upper part and the lower part of the second supporting plate 18 are respectively provided with a second screw hole, and the second screw 20 passes through the second screw hole and is matched with a nut to be fixed on the flat cover together with the second supporting plate 18.
The third anchor clamps include third layer board 21 and third screw 23, the one end that is close to flat lid 10 in barrel 1 is equipped with third layer board 21, be equipped with third screw 23 respectively about third layer board 21, third layer board 21 passes through bolted connection 12 with flat lid 10, experiment sample 11 welds on third layer board 21, third screw hole has been seted up respectively to the upper portion and the lower part of third layer board 21 wherein, third screw 23 passes third screw hole cooperation nut and is fixed on flat lid with third layer board 21.
The horizontal external pressure experimental device has the characteristics of repeated use and suitability for external pressure experiments of various pressure vessels. The experimental sample is connected with the experimental device through the corresponding clamp, and the experimental platform is pressurized by adopting liquid for safety consideration.
The horizontal external pressure experimental device comprises a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of an experimental sample 11 and is electrically connected with the computer.
The horizontal external pressure experimental device comprises a camera, wherein the camera is arranged at an observation port 1001 and is electrically connected with a computer.
The invention also aims to provide a using method of the horizontal external pressure experimental device, which comprises the following steps:
1) firstly, sticking a strain gage on the inner side of an experimental sample 11 to be tested, clamping the experimental sample in a cylinder 1 through a clamp mechanism 3, connecting the strain gage stuck on the experimental sample 11 with a computer through an observation port at a flat cover 10, and recording the stress strain of the experimental sample in the experimental process; in order to facilitate the observation of the change of the experimental sample 11, a camera is also arranged at the observation port of the flat cover 10, and the camera is also connected with a computer;
2) then, a pressure gauge is installed on a pressure gauge port 13 of the cylinder 1, the water injection port 5 and the loading port 7 are respectively connected with a water pump and a booster pump, and all instruments and meters are debugged before the experiment is started;
3) then, starting an experiment, namely filling water into the container through the water filling port 5, continuously pressurizing through the loading port 7, observing that the experimental sample 11 begins to be sunken through the observation port at the flat cover 10, gradually enlarging the sunken part along with the increase of pressure, recording pressure data on a pressure gauge after the sunken part is observed to be suddenly changed and a loud sound is heard, wherein the pressure is the critical instability pressure when the experimental sample 11 is unstable;
4) so far, the external pressure experiment is ended, has preserved data such as stress-strain in the computer, then carries out the pressure release through drain 14, later by the interior liquid of drain 6 eduction gear, dismantles experiment sample 11 at last, remains anchor clamps etc. and stays and wait for next use.
Wherein the clamping mechanism in the step 1) is divided into three types, namely a first clamp for clamping the cylindrical shell, a second clamp for flexibly adjusting the height of the experimental sample or a third clamp for clamping the end socket type sample.
Claims (10)
1. A horizontal external pressure experimental device comprises a barrel body (1), a saddle (4), a water injection port (5), a water discharge port (6), a loading port (7), a flange (8), a flat cover (10), an experimental sample (11), a pressure gauge port (13) and a vent port (14), wherein the barrel body (1) is fixed on the saddle (4), the water injection port (5), the water discharge port (6) and the loading port (7) are sequentially arranged below the barrel body (1), the pressure gauge port (13) and the vent port (14) are arranged above the barrel body, one end of the barrel body (1) is provided with a hole, the flange (8) is welded on the outer side of the hole, the flat cover (10) is arranged on the flange (8), and the horizontal external pressure experimental device is characterized in that a clamp mechanism (3) for fixing the experimental sample (11) is arranged in the barrel body (1), the experimental sample (11) is clamped in the barrel body (1) through the clamp mechanism (3), the clamp mechanism (3) is fixed on the flat cover (10), and the flat cover (10) is connected with the flange (8) through the stud bolts (9).
2. The horizontal external pressure experimental device as claimed in claim 1, wherein the fixture mechanism (3) is a first fixture for holding the cylindrical shell, a second fixture or a third fixture for holding the end enclosure type sample.
3. The horizontal external pressure experimental device according to claim 2, wherein the first fixture comprises a set of first supporting plates (15), a set of first sample reinforcing rings (16) and a set of first screws (17), the first supporting plates (15) are respectively arranged at two ends in the cylinder (1), wherein, the first supporting plate (15) close to one end of the flat cover (10) is fixed with the flat cover (10) through a bolt (12), a first screw (17) is arranged between the two first supporting plates (15), a plurality of first grooves (1501) are formed in the first supporting plate (15), sealing rings are arranged in the first grooves (1501), the experimental sample (11) is welded on a first sample reinforcing ring (16), and the first sample reinforcing ring (16) is arranged in the first grooves (1501) of the first supporting plates (15) at two ends and is abutted to the corresponding sealing rings.
4. The horizontal external pressure experimental apparatus as claimed in claim 3, wherein the first supporting plate (15) is provided with screw holes at its upper and lower portions, respectively, and the first screw (17) is fixed to the flat cover through the screw hole and a nut fitted to the first supporting plate (15).
5. The horizontal external pressure experimental device as claimed in claim 2, wherein the second fixture comprises a set of second supporting plates (18), a set of second sample reinforcing rings (19) and a set of second screws (20), the second supporting plates (18) are respectively disposed at two ends of the cylinder (1), the second supporting plates (18) are of a step-like structure, the step-like structure facilitates adjusting the height of the experimental sample (11), wherein the second supporting plates (18) near one end of the flat cover (10) are fixed to the flat cover (10) through bolts (12), the second screws (20) are disposed between the two second supporting plates (18), the second supporting plates (18) are provided with a plurality of second grooves (1801), sealing rings are disposed in the second grooves (1801), the experimental sample (11) is welded to the second sample reinforcing rings (19), the second sample reinforcing rings (19) are disposed in the second grooves (1801) of the second supporting plates (18) at two ends, and is abutted against the corresponding sealing ring.
6. The horizontal external pressure experimental device as claimed in claim 2, wherein the third fixture comprises a third supporting plate (21) and a third screw (23), the third supporting plate (21) is arranged at one end of the cylinder (1) close to the flat cover (10), the third screw (23) is respectively arranged above and below the third supporting plate (21), the third supporting plate (21) is connected with the flat cover (10) through a bolt (12), and the experimental sample (11) is welded on the third supporting plate (21).
7. The horizontal external pressure experimental device as claimed in claim 1, which comprises a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of the experimental sample (11), and the strain gauge is electrically connected with the computer.
8. The horizontal external pressure experimental apparatus as claimed in claim 1, wherein the flat cover (10) is provided with an observation port (1001) for conveniently observing the change of the sample.
9. The horizontal external pressure experimental apparatus according to claim 8, comprising a camera, wherein the camera is disposed at the observation port (1001) and electrically connected to the computer.
10. The horizontal external pressure experimental device as claimed in claim 1, which comprises a manhole (2), wherein a sealing head (24) is welded at the other end of the cylinder (1), the manhole (2) is arranged on the sealing head (24), and a flange cover (25) is arranged on the manhole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851424.9A CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851424.9A CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113607560A true CN113607560A (en) | 2021-11-05 |
| CN113607560B CN113607560B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110851424.9A Active CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001074624A (en) * | 1999-09-01 | 2001-03-23 | Nippon Steel Corp | External pressure load-testing device of steel pipe |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| CN104215514A (en) * | 2014-08-14 | 2014-12-17 | 合肥通用机械研究院 | Device for verifying critical load of external pressure spherical container |
| CN108458833A (en) * | 2018-03-23 | 2018-08-28 | 广州特种承压设备检测研究院 | The test method of outside pressure test machine and outside pressure test machine |
| CN208076315U (en) * | 2018-04-19 | 2018-11-09 | 福州大学 | Pulse external pressure buckling test device |
| CN208109594U (en) * | 2017-12-04 | 2018-11-16 | 广州铁诚工程质量检测有限公司 | A kind of tubing proof to external pressure experimental rig |
-
2021
- 2021-07-27 CN CN202110851424.9A patent/CN113607560B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001074624A (en) * | 1999-09-01 | 2001-03-23 | Nippon Steel Corp | External pressure load-testing device of steel pipe |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| CN104215514A (en) * | 2014-08-14 | 2014-12-17 | 合肥通用机械研究院 | Device for verifying critical load of external pressure spherical container |
| CN208109594U (en) * | 2017-12-04 | 2018-11-16 | 广州铁诚工程质量检测有限公司 | A kind of tubing proof to external pressure experimental rig |
| CN108458833A (en) * | 2018-03-23 | 2018-08-28 | 广州特种承压设备检测研究院 | The test method of outside pressure test machine and outside pressure test machine |
| CN208076315U (en) * | 2018-04-19 | 2018-11-09 | 福州大学 | Pulse external pressure buckling test device |
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| Publication number | Publication date |
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| CN113607560B (en) | 2024-01-30 |
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