CN110261076B - Multi-environment fatigue test device and method for flat plate sample - Google Patents
Multi-environment fatigue test device and method for flat plate sample Download PDFInfo
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
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Abstract
The invention relates to a multi-environment fatigue test device for a flat plate sample, which comprises a kettle body, and a sliding ring, a lower clamping ring, an upper clamping ring and a shear block which are sequentially arranged in the kettle body from bottom to top, wherein a test piece is arranged between the upper clamping ring and the lower clamping ring; the bottom of the kettle body is provided with an annular groove, and the sliding ring is arranged in the annular groove and is spaced from the bottom of the annular groove by a certain distance to form a bottom cavity; the upper part of the kettle body is provided with a shear block mounting groove along the inner wall, and an outer ring of the shear block is mounted in the mounting groove; a liquid discharge hole is formed in the side wall of the kettle body and used for discharging a fatigue environment medium on the upper part of the test piece; the bottom of the annular groove of the kettle body is provided with a pre-pressurizing pipeline interface and a test pressurizing and depressurizing pipeline interface. The invention can be used for simulating the real pressure-bearing working condition of a test piece, circularly loading the test piece, developing a fatigue test, obtaining the fatigue performance condition under the real working condition and the real environment, and reducing the test cost.
Description
Technical Field
The invention relates to the technical field of test devices, in particular to a multi-environment fatigue test device and a multi-environment fatigue test method for a flat plate sample.
Background
In the process of building and using deep sea equipment and pressure vessels, a pressure-bearing structure can involve fatigue problems, and the accurate evaluation of the fatigue performance of the structure is very important for the use safety of the equipment. At present, there are two main methods for analyzing the fatigue life condition of a structure: one method is to obtain the stress state of the key part of the structure through theoretical and numerical calculation, and then calculate the fatigue life of the structure according to the design specification, and the method can not reflect the dispersity of the fatigue life of the structure and accurately simulate the real load working condition in the service process of the structure; the other method is to carry out integral hydraulic fatigue test on the equipment scaling model by a test method to obtain the fatigue life condition of the model, the test cost of the method is higher, the processing quality of the scaling model is greatly different from the actual structure, and the reliability of the conclusion obtained by inferring the fatigue life condition of the structure according to the test result is poorer.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a multi-environment fatigue test device and a test method for a flat plate sample, which can independently perform a fatigue test on a local fatigue key structure of pressure-bearing equipment, obtain the fatigue performance conditions under real working conditions and real service media and reduce the test cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a multi-environment fatigue test device for a flat plate sample comprises a kettle body, and a sliding ring, a lower clamping ring, an upper clamping ring and a shear block which are sequentially arranged in the kettle body from bottom to top, wherein a test piece is arranged between the upper clamping ring and the lower clamping ring; the bottom of the kettle body is provided with an annular groove, and the sliding ring is arranged in the annular groove and is spaced from the bottom of the annular groove at a certain distance to form a bottom cavity; the upper part of the kettle body is provided with a shear block mounting groove along the inner wall, and the outer ring of the shear block is mounted in the mounting groove; a liquid discharge hole is formed in the side wall of the kettle body and used for discharging a fatigue environment medium on the upper part of the test piece; the bottom of the annular groove of the kettle body is provided with a pre-pressurizing pipeline interface and a test pressurizing and depressurizing pipeline interface.
In the above scheme, the inner circle of cauldron body bottom annular slot forms the boss, the boss middle part is equipped with the dirty groove of collection, experimental pressure relief pipeline interface that adds sets up between dirty groove of collection and annular slot, runs through the boss bottom.
In the scheme, a first sealing groove is formed in the inner side of the upper surface of the sliding ring, and a first O-shaped sealing ring is installed in the first sealing groove; and a second sealing groove is formed in the outer side of the upper surface of the sliding ring, and a second O-shaped sealing ring is installed in the second sealing groove.
In the above scheme, the lower surface of the lower clamping ring is matched with the upper surface of the sliding ring, the upper surface of the lower clamping ring is designed in a stepped manner, the outer side of the lower clamping ring is higher than the inner side, the outer side surface is an upper clamping surface of a test piece, the outer side surface is an inclined surface inclined downwards from outside to inside, a third sealing groove is formed in the outer side surface, and a third O-shaped sealing ring is installed in the third sealing groove.
In the scheme, the sliding ring is fixedly connected with the lower clamping ring through the screw.
In the scheme, the lower surface of the upper clamping ring is a lower clamping surface of the test piece, and the lower clamping surface is an inclined surface which is inclined downwards from inside to outside; and a fourth sealing groove is formed in the lower surface of the upper clamping ring, and a fourth O-shaped sealing ring is installed in the fourth sealing groove.
In the scheme, the shear resistant block is a whole circle structure formed by a plurality of shear resistant block segments, and the shear resistant block segments comprise three types of standard sector shear resistant blocks, parallel edge shear resistant blocks and connecting shear resistant blocks: one parallel edge shear resistant block is arranged, and the vertical edges at two sides of the parallel edge shear resistant block are parallel edges; the two connecting shear-resistant blocks are respectively arranged on two sides of the parallel edge shear-resistant block and used for connecting the standard fan-shaped shear-resistant block and the parallel edge shear-resistant block.
In the scheme, the shear block is provided with screw holes for mounting screws.
In the scheme, the contact surface of the shear block and the upper clamping ring is an inclined surface which is inclined upwards from outside to inside.
A test method of a flat plate sample multi-environment fatigue test device comprises the following steps:
(1) filling hydraulic medium into the annular groove at the bottom of the kettle body, and hoisting the sliding ring into the annular groove;
(2) hoisting the lower clamping ring in place, and fastening the lower clamping ring and the sliding ring by using a screw to form a lower sealing cavity;
(3) filling a hydraulic medium into the kettle body, and hoisting the test piece in place;
(4) hoisting the upper clamping ring to the upper part of the test piece, and installing the upper clamping ring in place;
(5) sequentially installing the shear blocks into the annular shear block grooves of the kettle body;
(6) a pressurizing pump is used for pre-pressurizing a cavity at the lower part of the sliding ring to the highest test pressure through a pre-pressurizing pipeline connector, and the sliding ring floats upwards to clamp the upper clamping ring, the lower clamping ring, the test piece and the shear block;
(7) injecting a fatigue environment medium into the upper part of the test piece, and performing pressure increasing and releasing operation by using a pressure increasing and releasing system through a test pressure increasing and releasing pipeline interface according to a set pressure program until the test is finished;
(8) after the test is finished, sequentially unloading the pressure in the lower cavity of the test piece and the pressure in the lower cavity of the sliding ring to 0MPa, and then discharging the fatigue environment medium through a liquid discharge hole;
(9) the upper clamping ring is extruded and sunk through mounting screws on screw holes in the shear-resistant block so as to smoothly remove the shear-resistant block, and then the test device is sequentially disassembled according to the reverse order during mounting.
The invention has the beneficial effects that:
1. the testing device can be used for simulating the real pressure-bearing working condition of a test piece, circularly loading the test piece, developing a fatigue test, obtaining the fatigue performance conditions under the real working condition and the real environment, and reducing the testing cost.
2. Different fatigue environment media can be put into the upper part of the sample according to the actual situation, and the real service environment of the sample is simulated.
3. Through the vertical adjustment of lower grip ring and slip ring, can realize carrying out hydraulic fatigue test to the test piece that has different thickness centre gripping positions.
4. The invention has simple structure, and the shear resistant block is composed of a plurality of small blocks and is convenient to assemble and disassemble.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a perspective view of a multi-environment fatigue testing apparatus for a flat plate sample according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
FIG. 4 is a block diagram of a slip ring of the test apparatus of the present invention;
FIG. 5 is a block diagram of the lower retaining ring of the trial of the present invention;
FIG. 6 is a block diagram of the upper retaining ring of the trial of the present invention;
FIG. 7 is a block diagram of a shear block segment of the trial of the present invention.
In the figure: 10. a kettle body; 11. an annular groove; 12. a boss; 121. a sewage collecting tank; 13. a drain hole; 14. pre-pressurizing a pipeline interface; 15. testing pressure adding and releasing pipeline interfaces; 20. a slip ring; 21. a first O-ring seal; 22. a second O-ring seal; 30. a lower clamping ring; 31. a third O-ring seal; 40. an upper clamping ring; 41. a fourth O-shaped sealing ring; 50. a shear block; 51. a standard fan-shaped shear block; 52. the parallel edge shear block; 53. connecting the shear-resistant blocks; 200. and (5) testing the part.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the apparatus for testing the environmental fatigue of a flat plate sample according to a preferred embodiment of the present invention includes a kettle 10, and a sliding ring 20, a lower clamping ring 30, an upper clamping ring 40 and a shear block 50 sequentially installed inside the kettle 10 from bottom to top, wherein a test piece 200 is installed between the upper clamping ring 40 and the lower clamping ring 30. The bottom of the kettle body 10 is provided with an annular groove 11, and the sliding ring 20 is installed in the annular groove 11 and is spaced from the bottom of the annular groove 11 by a certain distance to form a bottom cavity. The upper part of the kettle body 10 is provided with a mounting groove of the shear resistant block 50 along the inner wall, and the outer ring of the shear resistant block 50 is mounted in the mounting groove. And a liquid discharge hole 13 is formed in the side wall of the kettle body 10 and used for discharging a fatigue environment medium on the upper part of the test piece 200. The bottom of the annular groove 11 of the kettle body 10 is provided with a pre-pressurizing pipeline interface 14 and a test pressurizing and pressure relieving pipeline interface 15. The lower cavity of the slip ring 20 may be pre-pressurized to a maximum test pressure through the pre-pressurizing line connection 14 using a pressurizing pump, and the slip ring 20 floats up to clamp the upper clamp ring 40, the lower clamp ring 30, the test piece 200, and the shear block 50.
Further preferably, in this embodiment, a boss 12 is formed at an inner ring of the annular groove 11 at the bottom of the kettle body 10, a dirt collecting groove 121 is formed in the middle of the boss 12, and the test pressure and pressure adding and releasing pipeline interface 15 is arranged between the dirt collecting groove 121 and the annular groove 11 and penetrates through the bottom of the boss 12. The dirt collecting groove 121 can prevent impurities from entering the pressure adding and releasing pipeline to cause blockage.
Referring to fig. 3 and 4, a first sealing groove is formed in the inner side of the upper surface of the sliding ring 20, a first O-ring 21 is installed in the first sealing groove, and the inner wall of the first O-ring 21 is closely attached to the boss 12. The outer side of the upper surface of the sliding ring 20 is provided with a second sealing groove, a second O-shaped sealing ring 22 is installed in the second sealing groove, and the outer wall of the second O-shaped sealing ring 22 is tightly attached to the kettle body 10.
Referring to fig. 3 and 5, the lower surface of the lower retaining ring 30 is fitted with the upper surface of the sliding ring 20, the upper surface of the lower retaining ring 30 is designed in a stepped manner, the outer upper surface is higher than the upper surface of the boss 12, the inner upper surface is not higher than the upper surface of the boss 12, the outer upper surface is the upper retaining surface of the test piece 200, and the outer surface is a slope which is inclined downwards from the outside to the inside. And a third sealing groove is formed in the upper surface of the outer side, and a third O-shaped sealing ring 31 is arranged in the third sealing groove. The structural design of the lower clamping ring 30 enables a cavity to be formed below the test piece 200, hydraulic medium is filled into the cavity during testing, and the cavity is repeatedly pressurized and depressurized through a test pressurizing and depressurizing pipeline interface 15 according to set pressure parameters by using a pressurizing and depressurizing system, so that the test piece 200 bears the circulating pressure load.
In this embodiment, the sliding ring 20 and the lower clamping ring 30 are fastened by screwing screws, and the first O-ring 21 and the second O-ring 22 are pressed at the same time, so that sealing surfaces are formed on both sides of the sliding ring 20 and the lower clamping ring 30.
Referring to fig. 3 and 6, the lower surface of the upper clamp ring 40 is a lower clamp surface of the test piece 200, and the lower clamp surface is a slope inclined downward from the inside to the outside. The lower surface of the upper clamping ring 40 is provided with a fourth sealing groove, and a fourth O-shaped sealing ring 41 is installed in the fourth sealing groove.
Before the test, the two ends of the test piece 200 need to be processed into shapes (trapezoidal shapes with gradually reduced cross sections) matched with the clamping surfaces of the lower clamping ring 30 and the upper clamping ring 40, the design can reduce the rotation constraint on the edge of the test piece 200, reduce the stress on the edge of the test piece 200, and avoid the fatigue failure of the edge of the test piece 200 before the middle.
Referring to fig. 2, 3 and 7, the shear block 50 is a round structure formed by several shear block 50 segments, and the shear block 50 segments include three types of standard fan-shaped shear blocks 51, parallel-edge shear blocks 52 and joint shear blocks 53: the structure design is convenient for the assembly and disassembly of the shear block 50, and the shear block 52 with the parallel edge is provided with one vertical edge and two connecting shear blocks 53, wherein the two vertical edges are parallel edges, and the two connecting shear blocks are respectively arranged on the two sides of the shear block 52 with the parallel edge and used for connecting the standard fan-shaped shear block 51 and the shear block 52 with the parallel edge. The contact surface of the shear block 50 and the upper clamp ring 40 is an inclined surface, which can prevent the shear block from sliding out of the installation groove due to repeated pressurization and pressure relief in the test process.
Further preferably, in this embodiment, the inner side edge of the segment of the shear block 50 is provided with a screw hole for installing a screw, and after the test is finished, the screw is rotated to extrude and sink the movable structural member below the shear block 50, so as to smoothly take out the shear block 50.
The multi-environment fatigue test device for the flat plate sample can independently sample the local fatigue key structure of the pressure-bearing equipment to carry out fatigue tests under real working conditions and real service environments, and the test method specifically comprises the following steps:
(1) and filling hydraulic medium into the annular groove 11 at the bottom of the kettle body 10, and hoisting the sliding ring 20 into the annular groove 11.
(2) The first O-shaped sealing ring 21 and the second O-shaped sealing ring 22 are placed in sealing grooves at two sides of the sliding ring 20, the lower clamping ring 30 is hoisted in place, the lower clamping ring 30 and the sliding ring 20 are fastened by using screws, and meanwhile, the O-shaped sealing rings are tightly pressed to form a lower sealing cavity.
(3) And placing the third O-shaped sealing ring 31 into the sealing groove of the lower clamping ring 30, filling a hydraulic medium into the kettle body 10, and hoisting the test piece 200 in place after the liquid level reaches the position of the third O-shaped sealing ring 31.
(4) And placing the fourth O-shaped sealing ring 41 into the groove at the lower side of the upper clamping ring 40, firmly bonding, hoisting the upper clamping ring 40 to the upper part of the test piece 200, and installing in place.
(5) The shear blocks 50 are sequentially arranged in the groove of the annular shear block 50 of the kettle body 10, the standard fan-shaped shear block 51 is sequentially arranged, and finally the parallel edge shear block 52 and two adjacent connecting shear blocks 53 are arranged.
(6) The lower cavity of the slip ring 20 is pre-pressurized to the highest test pressure through the pre-pressurizing pipe joint 14 by using a pressurizing pump, and the slip ring 20 floats upwards to clamp the upper clamping ring 40, the lower clamping ring 30, the test piece 200 and the shear block 50.
(7) And injecting a fatigue environment medium into the upper part of the test piece 200, and using a pressure adding and releasing system to add and release pressure through the test pressure adding and releasing pipeline interface 15 according to a set pressure program until the test is finished.
(8) After the test is finished, the pressure in the lower cavity of the test piece 200 and the pressure in the lower cavity of the sliding ring 20 are sequentially discharged to 0MPa, and then the fatigue environment medium is discharged through the liquid discharge hole 13.
(9) The upper clamp ring 40 is pressed and sunk by installing screws through screw holes on the shear block 50 to smoothly remove the shear block 50, and then the test devices are sequentially disassembled in the reverse order of the installation.
The multi-environment fatigue test device for the flat plate sample can be used for simulating the real pressure-bearing working condition of the test piece 200, circularly loading the test piece 200 and carrying out a fatigue test; and different fatigue environment media can be put into the upper part of the sample according to the actual condition to simulate the real service environment of the sample. Through the up-and-down adjustment of the lower clamping ring 30 and the sliding ring 20, the hydraulic fatigue test of the test piece 200 with clamping parts with different thicknesses can be realized, and the universality is strong. In addition, the invention has simple structure, the shear resistant block 50 is composed of a plurality of small blocks, the assembly and disassembly are convenient, and the working efficiency can be effectively improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The multi-environment fatigue test device for the flat plate sample is characterized by comprising a kettle body, and a sliding ring, a lower clamping ring, an upper clamping ring and a shear block which are sequentially arranged in the kettle body from bottom to top, wherein a test piece is arranged between the upper clamping ring and the lower clamping ring; the lower surface of the lower clamping ring is matched with the upper surface of the sliding ring, the upper surface of the lower clamping ring is designed in a stepped manner, the outer side of the lower clamping ring is higher than the inner side of the lower clamping ring, the outer side surface of the lower clamping ring is an upper clamping surface of a test piece, and the outer side surface of the lower clamping ring is an inclined surface which is inclined downwards from outside to inside; the lower surface of the upper clamping ring is a lower clamping surface of the test piece, and the lower clamping surface is an inclined surface which is inclined downwards from inside to outside; the bottom of the kettle body is provided with an annular groove, and the sliding ring is arranged in the annular groove and is spaced from the bottom of the annular groove at a certain distance to form a bottom cavity; the upper part of the kettle body is provided with a shear block mounting groove along the inner wall, and the outer ring of the shear block is mounted in the mounting groove; a liquid discharge hole is formed in the side wall of the kettle body and used for discharging a fatigue environment medium on the upper part of the test piece; the bottom of the annular groove of the kettle body is provided with a pre-pressurizing pipeline interface and a test pressurizing and depressurizing pipeline interface.
2. The device for testing the environmental fatigue of the flat plate sample according to claim 1, wherein a boss is formed on an inner ring of the annular groove at the bottom of the kettle body, a sewage collecting groove is arranged in the middle of the boss, and the interface of the test pressure adding and releasing pipeline is arranged between the sewage collecting groove and the annular groove and penetrates through the bottom of the boss.
3. The device for testing the environmental fatigue of the flat plate sample according to claim 1, wherein a first sealing groove is formed in the inner side of the upper surface of the sliding ring, and a first O-shaped sealing ring is installed in the first sealing groove; and a second sealing groove is formed in the outer side of the upper surface of the sliding ring, and a second O-shaped sealing ring is installed in the second sealing groove.
4. The multi-environment fatigue test device for the flat plate samples as claimed in claim 3, wherein a third sealing groove is formed on the outer side surface, and a third O-shaped sealing ring is installed in the third sealing groove.
5. The multi-environment fatigue testing device for the flat plate test specimen as claimed in claim 4, wherein the sliding ring and the lower clamping ring are fastened and connected through screws.
6. The multi-environment fatigue test device for the flat plate samples as claimed in claim 4, wherein a fourth sealing groove is formed in the lower surface of the upper clamping ring, and a fourth O-shaped sealing ring is installed in the fourth sealing groove.
7. The flat panel sample multi-environment fatigue testing apparatus according to claim 1, wherein the shear blocks are formed into a full circle structure by a plurality of shear block segments, and the shear block segments include three types of standard fan-shaped shear blocks, parallel-edge shear blocks and connecting shear blocks: one parallel edge shear resistant block is arranged, and the vertical edges at two sides of the parallel edge shear resistant block are parallel edges; the two connecting shear-resistant blocks are respectively arranged on two sides of the parallel edge shear-resistant block and used for connecting the standard fan-shaped shear-resistant block and the parallel edge shear-resistant block.
8. The device for testing the environmental fatigue of the flat panel test specimen according to claim 7, wherein the shear block segment is provided with screw holes for mounting screws.
9. The device for testing the environmental fatigue of the flat plate specimen according to claim 1, wherein the contact surface of the shear block and the upper clamping ring is a slope inclined upwards from outside to inside.
10. The method of testing a flat panel sample multi-environment fatigue testing apparatus according to claim 8, wherein the method comprises the steps of:
(1) filling hydraulic medium into the annular groove at the bottom of the kettle body, and hoisting the sliding ring into the annular groove;
(2) hoisting the lower clamping ring in place, and fastening the lower clamping ring and the sliding ring by using a screw to form a lower sealing cavity;
(3) filling a hydraulic medium into the kettle body, and hoisting the test piece in place;
(4) hoisting the upper clamping ring to the upper part of the test piece, and installing the upper clamping ring in place;
(5) sequentially installing the shear blocks into the annular shear block installation grooves of the kettle body;
(6) a pressurizing pump is used for pre-pressurizing a cavity at the lower part of the sliding ring to the highest test pressure through a pre-pressurizing pipeline connector, and the sliding ring floats upwards to clamp the upper clamping ring, the lower clamping ring, the test piece and the shear block;
(7) injecting a fatigue environment medium into the upper part of the test piece, and performing pressure increasing and releasing operation by using a pressure increasing and releasing system through a test pressure increasing and releasing pipeline interface according to a set pressure program until the test is finished;
(8) after the test is finished, sequentially unloading the pressure in the lower cavity of the test piece and the pressure in the lower cavity of the sliding ring to 0MPa, and then discharging the fatigue environment medium through a liquid discharge hole;
(9) the upper clamping ring is extruded and sunk through mounting screws on screw holes in the shear-resistant block so as to smoothly remove the shear-resistant block, and then the test device is sequentially disassembled according to the reverse order during mounting.
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| CN201910324044.2A CN110261076B (en) | 2019-04-22 | 2019-04-22 | Multi-environment fatigue test device and method for flat plate sample |
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| CN201910324044.2A CN110261076B (en) | 2019-04-22 | 2019-04-22 | Multi-environment fatigue test device and method for flat plate sample |
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| JP3773005B2 (en) * | 1996-12-26 | 2006-05-10 | 株式会社フジタ | Plane strain compression test equipment |
| CN101419147B (en) * | 2008-11-30 | 2011-02-02 | 青岛大学 | Rubber diaphragm antifatigue test device |
| CN202066761U (en) * | 2011-05-20 | 2011-12-07 | 长安大学 | Torsion shear test device used for bituminous pavement materials and structure |
| CN103969114B (en) * | 2014-04-15 | 2016-02-10 | 昆明理工大学 | A kind of cellular board fatigue test device and method of testing |
| CN105466677A (en) * | 2016-01-11 | 2016-04-06 | 北京九州一轨隔振技术有限公司 | Tunnel acoustic baffle fatigue tester |
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